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Old Feb 28, 2006, 05:49 PM
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Vinyl tape is that electrical tape from Ace hardware at 1$ a roll



Vinyl tape does not handle heat well, so the spacers between motor and fan housing are made with 3m masking tape (papery stuff) from Ace hardware:



You can find most of these tapes at target, loews, home depot etc as well. Hope this helps hwh
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Old Mar 05, 2006, 05:14 PM
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I saw Gregg fly his on the weekend, WOW. It was the first time i had seen a ducted fan fly. The speed is impressive and so was the flight. This is one very nice plane.
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Old Mar 07, 2006, 08:05 PM
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Quote:
these 3S packs have all comparable dimensions, and so I think will fit in width/height (lenght is not much of an issue) in the MiG-15:

Kokam 3200 131x43x23mm 240g

PQ 3700XP 130x44x21mm 255g

Tanic 3650 135x44x21mm 273g

XCell 3900 134x43.5x21mm 276g

Above dimensions and weights are without shrinkwrap, cables etc.
I was just about ready to buy a set of these PQ 3700XP "so called twenties" for testing in the MiG , when I noticed these sobering experiences :

http://www.rcgroups.com/forums/showthread.php?t=485351

Some people report poor performance (sagging voltage under load) after ca. 30 cycles here as well:

http://www.rc-network.de/forum/showt...t=40229&page=3

so these don't seem isolated cases .

It looks like these newer PQ XP's are just as overhyped as the previous generation of junk they produced, which is quite unfortunate.

Will have to stick to the trusty Kokam's for now ...
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Old Mar 07, 2006, 08:19 PM
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Herb, Gregg is using 6s2p 2100 saheen cells and performance is outstanding, it may be worth a look
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Old Mar 09, 2006, 11:46 PM
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There's certainly something to be said for good quality smaller packs - they are cheaper (ie Apex Mk2), and can be re-arranged to fit lots of different tight spaces, and planes - including smaller ones
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Old Mar 21, 2006, 04:22 PM
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Just flew the MiG-15 last weekend on a new Hyperion VX 3700 6S pack (3S+3S), which fits fine since the size is almost identical to the Kokam 3200 pack.

It gives slightly more power (lower impedance), but more importantly it runs a lot cooler than the Kokam pack. The Kokam 3200's seem to be losing their competitive price/performance edge. The flight was short though due to the very high winds (20-30+ knots) .

.
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Old Mar 21, 2006, 04:57 PM
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That's cool Herb
I use the same batt in the K@A mig good flight times battery hardly warm after 5min @50 amps Thats my next build Herb is the wemotec mig your videos of it are fantastic with awesome performance

Cheers to your great mig

Tony
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Old Mar 22, 2006, 01:50 PM
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Is this model in full production yet. And if so is it available in the UK

www.densplanes.co.uk
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Old Mar 22, 2006, 02:14 PM
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It is in full production for nearly a year now, but qty is low.
There are a couple in the UK already, but to my knowledge there is no dealer stocking it so far.

Our new webshop is nearly ready and you will be able to find all information there on april 3rd.

Oliver
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Old Mar 22, 2006, 02:14 PM
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Quote:
Originally Posted by Bigplumbs
Is this model in full production yet. And if so is it available in the UK

www.densplanes.co.uk
Randy
Sells them here is a link
http://www.dynamoelectrics.com
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Old Mar 22, 2006, 02:26 PM
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Quote:
Originally Posted by Bigplumbs
Is this model in full production yet. And if so is it available in the UK
Order it directly from WeMoTec ? God knows how many planes I got shipped from Oliver (wife keeps count ) and believe me I am alot farther than you are ...
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Old Mar 22, 2006, 02:40 PM
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@Herb:
Two? Three?

I feel you may have declared others as "coming from Oliver" to bypass "wify customs" easier.

"Oh I have an old friend in Germany, no idea why he keeps sending me models..."

Oliver
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Old Mar 23, 2006, 05:12 PM
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Quote:
Originally Posted by WeMoTec
@Herb:
Two? Three?

I feel you may have declared others as "coming from Oliver" to bypass "wify customs" easier.

"Oh I have an old friend in Germany, no idea why he keeps sending me models..."

Oliver
Oliver

How do I get one of these shipped to the UK and what would be the price.

Thanks

www.densplanes.co.uk
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Old Mar 24, 2006, 05:47 AM
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Hi Herb,

do you use cooling for the flight pack?

Alex
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Old Mar 26, 2006, 02:22 PM
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The 3700 pack seems to run quite cool so far.... Had one more flight with it yesterday, and after a 4-5min flight it was barely warm!!

I use a lot of throttle management, so the *average* current draw is probably only in the 40A range? After the flight I put back about 1.5 Ah, so it seems I used only 40% of the pack ...

The whistle on this one is just unbelieveable . But I still need to work on the takeoffs and landings. I think on ground takeoff the nose gets "glued" to the ground by the fan suction, so when I give it a lot of elevator it eventually tends to snap off and goes up a bit abruptly . Also, on landings it tends to bounce off the ground an get airborne again - and if I slow it down too much it tipstalls. Practice practice ...
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Old Mar 26, 2006, 09:19 PM
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Watch Herb fly it yesterday and today, It rocks!
Today he worked out the hyperions with several long WOT circuits(not just passes)
and it really started moving!(Scary Fast!)
I'd guess somewhere over 130mph at least.
It does need a drag chute or something for the landings!
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Old Mar 27, 2006, 07:30 AM
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thanks herb,

so 4.5 mins flight, 1.5Ah used, implies 20 amps average, ~ 420 watts average for the whole flight, sounds good.
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Old Mar 27, 2006, 01:11 PM
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... Yesterday's flight (the one Bruce is referring to) was around 5 mins too, but with more wot than on Saturday's flight.

At home I put back 2.1Ah, so that was again only around 2.1/3.7 = 57% used up capacity (between flying and cooling/resting the pack, I don't fly these kind of superpacks more than once per afternoon).

Pack temperature right after the flight was 40 deg Celsius (ca 100 deg Fahrenheit). The pack has almost no cooling, the shrinkwrap on the Hacker Master 77A opto yesterday melted off completely though, has been re-wrapped in kapton now.
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Old Mar 28, 2006, 05:25 AM
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Quote:
Originally Posted by Herb
the shrinkwrap on the Hacker Master 77A opto yesterday melted off completely though, has been re-wrapped in kapton now.
dang thats hot

but nice pack temp
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Old Apr 10, 2006, 02:28 PM
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Pictures from the field - yes we do have grass now, but not yest in the right spots

Hacker 77A master still gets a bit hot after 5 min flight, battery still using only ca. 2.1 Ah out of 3.7 Ah, and barely warm.


.
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Old Apr 10, 2006, 07:19 PM
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Herb
I have one of the migs on order.
Are you using the Hacker b50-18s if so can I run the b50 in a 609fan for the K&A mig if not what would you suggest for both.

Thanks

Tony
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Old Apr 11, 2006, 01:56 PM
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I find it often hard to use the same motor in two quite different airframes. The answer to your question is in principle: yes.

But the WeMoTec MiG-15 is quite a bit bigger than the K&A one, and the latter does not have a whole lot of space for the batteries (at least not in the "standard" configuration).

So, while a natural setup for the WeMoTec MiG-15 is a 3S+3S=6S LiPo pack (which naturally leads to a MidiFan motor like the Hacker B50-18S or Kontronic Fun 600-17 etc), for the K&A MiG-15 it makes more sense to use a beefy 3S to 4S pack (which leads to a motor with a hotter wind, eg B50-12S or similar for the HW-609 fan).

Also, the K&A would fly fine even with the Minifan - today there's motors out there that can deliver 600-700 Watts reliably in this size fan. But then heating can be an issue too.
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Old Apr 11, 2006, 01:58 PM
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Incidentally, WeMoTec now has a completely re-designed and re-wamped page :

www.wemotec.com
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Old Apr 11, 2006, 04:16 PM
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Thanks alot Herb

Just tryin to mimic your setups cause they rock
..
Tony
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Old Apr 11, 2006, 05:08 PM
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Quote:
Originally Posted by Bigplumbs
Oliver

How do I get one of these shipped to the UK and what would be the price.

Thanks
When I first asked about this model they were all going out pre-ordered, but when there are spare kits available they will be stocked in UK by Puffin (a UK Distributor for Wemotec).

You can order directly from Oliver at Wemotec.
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Old Apr 12, 2006, 10:24 AM
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Herb

If you get a chance can you post an updated link to your wemo mig roll off dirt.

Thanks

Tony
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Old Apr 14, 2006, 09:09 PM
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The video should work fine, use "save as" though.

Here's the link again:

SOD ("scrape off the dirt") MiG-15 video
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Old Apr 14, 2006, 09:30 PM
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Thanks Herb..
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Old Apr 16, 2006, 01:01 PM
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Herb

I have a 60amp controller will I need to get an 80 also are you running the kokams in a series and what type of voltage is the motor seeing .

Thanks tony
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Old Apr 17, 2006, 02:40 AM
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Yes I am running the Kokams in series. On a 6S the voltage under load is around 20V. The 60A controller might work, but it's always good to have some margin. It just depends what you setup and how many amps you are drawing.

Here's another video of the MiG-15, taken by Mr. Chang - with music:

Another MiG-15 SOD video
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Old Apr 17, 2006, 09:48 AM
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Thanks Herb
Just trying to figure out what esc I will need to run on the setup you have your setup is awesome I have every thing but the plane and controller.
The plane should be here in a few weeks just in time for some good weather here in the NW . I will be running your setup other than the esc which I think you are using a hacker.How many amps are you drawing..

Thanks

Tony
ps Thanks for the vids
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Old Apr 17, 2006, 03:15 PM
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Tony, I watch Herb fly the Mig every weekend and I would recommend the 80 ESC
as the Mig gets going so fast at WOT, it starts to look like a pylon racer!
(over 130mph easily)
The 80 will run cooler then the 60 when using partial throttle and give you a chance to keep it in sight!
just my two cents.
Bruce
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Old Apr 17, 2006, 07:21 PM
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Thanks Bruce the 80 it is..


Tony
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Old Apr 18, 2006, 12:18 PM
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Quote:
Originally Posted by mediq
... Herb, just trying to figure out what esc I will need to run on the setup you have. Your setup is awesome, I have everything but the plane and controller ... I will be running your setup other than the esc which I think you are using a Hacker. How many amps are you drawing? ...
My setup is a bit hot and requires very careful throttle managment and very good lipos. I run a Hacker B50-18S and a Hacker Master 77A which are both three years old, in flight the amps wot are around 65 I think.

But I would recommend a softer wind (kv of around 1700) on 6S, and maybe the larger Hacker B50-xxL motor (or equivalent Kontronic 600-17).

http://www.hacker-motor.com/deutsch/motor-b50.html

http://www.espritmodel.com/accesories_hacker.html

http://www2.towerhobbies.com/cgi-bin...&I=LXGCW7&P=ML

As stated before, the MiG-15 will fly very well already on around 800 Watts!

In any case you will require very good MOTOR COOLING (NO cone behing motor ever, and NO un-necessary static tests) and very good ESC COOLING (some indirect airflow, ESC behind motor or esc with fan).

I would suggest a good quality ESC such as Hacker-Jeti Master 77, Jeti Acro or Kontronic and possibly Hyperion?

http://www.hacker-motor.com/deutsch/...hlsteller.html

http://www.espritmodel.com/accesories_jetiesc.html

http://www.jetimodel.cz/eng/hlavnien.htm

I do not own any CC ESC's, all the ones I bought eventually failed one way or another.


.
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Old Apr 18, 2006, 08:15 PM
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Thanks Herb

For the wisdom thats why I want to mimic your setup I recieved the B50 18s 2 days ago I will take your advice on the on the controller I will go with hacker.
I plan on using 2 hyperion 3s3700 want to get my packs standardized that can run also in the K&A mig running 22/20/3 with 609 fan

Thanks again

Tony
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Old Apr 22, 2006, 10:55 AM
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Did you guys glue the wings on or just tape them?

Jim Phelps
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Old Apr 22, 2006, 01:14 PM
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I taped mine in (bottom only) with the idea of glueing them in later on. But then you know how things go, I still fly with the tape.
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Old Apr 24, 2006, 07:10 AM
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I did the same thing with the Panther and it's still flying with the tape on the bottom.

Jim
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Old Apr 24, 2006, 12:07 PM
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Radar-gunned yesterday by Mr. Chang at 129mph level into a 10-15kt headwind, and it's wasn't even full throttle except for a relatively short burst.
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Old Apr 24, 2006, 05:58 PM
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Herb

Will your current setup allow you to skid off short grass...?

Thanks

Tony
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Old Apr 25, 2006, 12:14 PM
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Really short grass definitely yes, longer grass probably no .

I think wet grass is more slippery too, so that would help. In any case very short grass would clearly work the best. Make sure there's no stuff in the way to get sucked in .
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Old Apr 25, 2006, 01:37 PM
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Quote:
Originally Posted by Herb
Really short grass definitely yes, longer grass probably no .

I think wet grass is more slippery too, so that would help. In any case very short grass would clearly work the best. Make sure there's no stuff in the way to get sucked in .

Will do thanks Herb.

I have all the electronics just waiting on the plane..
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Old May 01, 2006, 08:34 PM
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A possibly welcome development for edf'rs is the termination of FMA as a US exclusive distributor for Kokam Lipo cells:

http://www.rcgroups.com/forums/showt...=510817&pp=100

http://www.rcgroups.com/forums/showp...13&postcount=2

The packaging of the Kokams (first rate cells with a lot of potential) left somewhat to be desired:

The pcb board connections were dimensioned incorrectly for their claimed sustained currents (solder would melt into the bottom of the battery tray ).

The 4800 cells available in Europe since last fall were never introduced in the US either.

Their idea of using non-removable double sided mounting tape for attaching cells to each other (as opposed eg to a stripe of Kapton), so that there would be no way in hell to remove a cell from a pack , seemed idiotic as well.
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Old May 01, 2006, 08:40 PM
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LOL, plus - you won't have FRED to deal with
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Old May 01, 2006, 08:41 PM
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Herb,
All you have to do is drip some solvent between the cells and they will eventually come apart with no damage.

Steve C
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Old May 01, 2006, 08:53 PM
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Their pricing structure recently looked more and more anachronistic, did they have a good look at their competition lately? Does the cellpro charger work ?with a skorpion cable ?? in a balancepro module???

Thanks Steve, looks like these FMA geniuses did not know about this method :

http://www.rcgroups.com/forums/showp...5&postcount=44

At first the above post looked to me more like material suited for a mad tv episode.
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Old May 02, 2006, 12:02 AM
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Hey Herb!
"Strapping tape bandsaw method"
Sounds like something I would attempt to do at the field!LOL

Bruce
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Old May 02, 2006, 05:21 PM
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Herb

Are you running the controller in the exhaust or are you running it about midship..?
also I have a question on your K&A mig since you own both threads I hope you don't mind if I ask it here.
I have a mega 22/20/2 6s2p w/wemotec 609 fan do you have an idea what my amp draw might be..?

Thanks

Tony
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Old May 02, 2006, 05:56 PM
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The ESC is located in the tail under the duct, I like having the ESC-to-batt leads short (ie within specs) and have the ability to swap ESC if the need arises. The ESC (now Hacker 77 Master with gws low profile heatsink) did get really hot a few times though


.
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Old May 03, 2006, 11:04 AM
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Tony

I would not use 6s with the 22/20/2.
With 4s XCELL 3900 I get almost 70amp and over 1000w.
( fantastic cells btw.)

Mikael
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Old May 03, 2006, 01:57 PM
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Mikael, thats very interesting, i just ordered two 4s3900 xcell packs yesterday, for minifan use, but thats interesting!

what are your readings after 1 minute, volts and amps please. if you've already measured it, or maybe inflight. i thought even 4s would be too much for that motor

alex
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Old May 03, 2006, 06:06 PM
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Alex

Yes,4s of these cells are probably too much. Have to be carefull with the throttle.
I have only done a short static test, and no test flight yet. I dont really want to do a longer static test, because the motor will probably melt.

Mikael
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Old May 03, 2006, 06:45 PM
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i understand! thats fair enough
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Old May 03, 2006, 08:47 PM
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The Mega to use in EDF application is the "E" version, it was specifically designed for such abuse . The slightly lower kv with respect to the normal version is not from the copper windings, but due to the use of special high temp magnets:

http://www.megamotor.cz/new/script/m...a6673f936fe2fa

http://www.megamotor.cz

Mikael I already answered Tony's question here yesterday: http://www.rcgroups.com/forums/showp...&postcount=276
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Old May 03, 2006, 10:40 PM
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I'm sorry for the K&A question here I thought I would ask both questions while I had you attention..

My mistake..


Tony
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Old May 03, 2006, 11:46 PM
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No problem Tony Thought it was easier to answer it in the other thread just in case somebody else had a similar setup (and fan)...
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Old May 12, 2006, 03:11 PM
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Herb, I have enjoyed you construction of the MIG, waiting to get my hands on them ( The Mig 15 a favorite of mine). Now I have a few in, and you have to see them to appreciate how well thing are thought out.

Morris
Ductefans.com
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Old May 24, 2006, 10:26 PM
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Herb I'm at a loss on how to remove the tray w/o damaging the intake.
Is it attached to the duct and the fuse or just the duct...?
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Old May 26, 2006, 12:40 PM
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I used a long and thin kitchen knife to go in there and carefully separate the battery holder from the duct (I think that's where it was glued, I wrote about it above). Since it still would not come out though, I had to open a hatch in the front bottom, to get the battery holder detached from a ply former:

http://www.rcgroups.com/forums/showp...3&postcount=63

That front opening is after all not a bad idea, as it allows some air to get sucked in and cool the battery. With velcro on the back of the hatch, it also holds the battery in place.

It is my understanding that the production version of the MiG-15 will not have that FG battery holder.

I like the low location of the LiPo battery, it increases stability in flight. The FG fuse is quite strong and I've had no problems with "landing on the batteries".

My main problems so far have been with the esc (HM 77A) overheating on partial (<1/2) throttle, which usually would cut the flight short after 5mins or so. I have made several large openings in the fuse bottom which hopefully have cured the problem once and for all . At full throttle it pulls around 1500 Watts and accelerates to about 140mph in half a circuit.

I had around 20-25 flights with it, the takeoffs on grass seem less hairy than on packed dirt, as the grass keeps the intake a bit further from the ground, and the slide seems now a bit less bumpy. As a result I don't need all that "up" to get the nose unglued from the ground.


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Old May 26, 2006, 02:52 PM
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Thanks Herb

I do like the idea of them on the bottom than saddled on each side of the intakes.
Heck when will the production model start you had had yours for quite a while.
Well wish me luck..
Thanks
Tony
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Old May 27, 2006, 12:45 PM
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Yes I think the new version is supposed to come without that tube

http://www.wemotec.com/prototype/pro...=47&cPath=2_30
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Old May 27, 2006, 09:20 PM
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Tony

Check out post 194 before you comit to the tube thing. It was very easy to convert it to the top hatch thing.
I have now over 20 flights on this model and it is just awsome. A really great package. I am sure everone who has flown this model will agree.

Gregg
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Old May 28, 2006, 02:22 AM
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Gregg

Thanks for the heads up on the hatch .
I think I will try that for me at least it looks easier than hacking out the bottom.
Thanks

Tony
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Old Jun 13, 2006, 02:11 PM
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If you still have a few weeks before the maiden, you might want to consider getting the aluminum spinner upgrade for the Midi fan from WeMoTec, here's a few pictures of mine:

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Old Jun 13, 2006, 06:55 PM
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I'm running the aluminium spinner on mine and would also recommend this. Initially it was a little hard to get to fit but some careful trimming and all is well. PLUS it runs very smooth.
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Old Jun 14, 2006, 11:53 PM
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Do you order them from Wemo..?
Also Herb did you have to trim the exhaust duct..?
I have mine put together just need to put the fences on and decals.
Is there a performance plus with the alum spinner ? If not I'll keep the one I have it's balanced.


Thanks

Tony
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Old Jun 14, 2006, 11:59 PM
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The performance plus is only that the aluminium ones donít explode at high power levels. I think if you are running over 1kW then you should consider this as a safety feature.
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Old Jun 15, 2006, 04:50 PM
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Quote:
Originally Posted by mungrelv8ute
The performance plus is only that the aluminium ones donít explode at high power levels. I think if you are running over 1kW then you should consider this as a safety feature.

That makes good sense...
Thanks for the Tip
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Old Jun 17, 2006, 09:49 PM
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Is The CG accomplished rightside up or upsidedown..?
Thanks
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Old Aug 06, 2006, 04:46 PM
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Quote:
Originally Posted by mediq
Do you order them from Wemo..?
Also Herb did you have to trim the exhaust duct..?
I have mine put together just need to put the fences on and decals.
Is there a performance plus with the alum spinner ? If not I'll keep the one I have it's balanced. Thanks Tony

I got mine from WeMoTek, but the one in the MiG-15 still has the 3-year old plastic spinner. If you overtighten the screw, you might crack the plastic spinner .

I doubt the new spinner will give you a performance upgrade, unless you have bad vibrations to start with.

I did not trim the exhaust duct, but I do have a bit of down thrust and get some slight trim changes on power on (1500W) vs off . It does pitch up a bit in the turns when reduce the throttle, but I am used to it by now.
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Old Aug 06, 2006, 05:59 PM
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Mine went 90degs vertical sliding off ground it was so quick and unexpected that I could not recover smashing the nose.
At least it is easy to remove the battery tray.now.
And I don't know If i can repair it and getting another fuse doesen't seem possible either.
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Old Aug 06, 2006, 07:35 PM
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One thing to note with the wing fences.
When I got mine they had small tabs that were left from the CNC cutting process. I went ahead and removed these. What I should have done is left them on the bottom, the side that glues onto the wing, and instead cut small slots in the wing skin to accept these tabs. This would make the wing fences very secure.
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Old Aug 07, 2006, 12:00 PM
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Colour match

Could anyone let me know the exact make and colour of paint that the Wemo Mig 15 is sprayed , as i need to match it for the wing fences.
Thanks,

Bruce
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Old Aug 08, 2006, 03:11 PM
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Tony sorry to hear about your mishaps . Hope it's repairable with a bit of epoxy and glass cloth.

I feel a bit guilty of not having you warned enough about the pitch up, I had some hairy takeoffs with the MiG-15 myself occasionally - and some very smooth ones as well. The recent takeoffs have been very nice since I have learned what to expect. I think part of it was due to the nose getting glued to the ground, and the elevator being a bit on the sensitive side.

I flew it last Sunday and it was VERY windy (15kt winds, bursts to 25+) and it seems on the landing approach it got sucked by some nasty turbulence into the tree we have unfortunately placed right on the landing approach , so I just finished a few nose repairs myself.
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Old Aug 08, 2006, 03:59 PM
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Quote:
Originally Posted by Herb
Tony sorry to hear about your mishaps . Hope it's repairable with a bit of epoxy and glass cloth.

I feel a bit guilty of not having you warned enough about the pitch up, I had some hairy takeoffs with the MiG-15 myself occasionally - and some very smooth ones as well. The recent takeoffs have been very nice since I have learned what to expect. I think part of it was due to the nose getting glued to the ground, and the elevator being a bit on the sensitive side.

I flew it last Sunday and it was VERY windy (15kt winds, bursts to 25+) and it seems on the landing approach it got sucked by some nasty turbulence into the tree we have unfortunately placed right on the landing approach , so I just finished a few nose repairs myself.
Yea Bruce told me you were out of the country I tried to wait till you got back but a kid with a new toy set in.
I'm hoping to be able repair it ,I cut the nose off where the panel line is because the intake ducting is glassed to the nose.
Once that was removed I was able to cut the intake ducting back to where it wasn't smashed by the batteries. One thing for sure I can make the battery tray much better to accomadate the lipo's better. Then I will re-glass the nose back on to the fuse alittle touch up paint and away we go.
Herb

I rememberd your warning about the nose pitching skyward But being a rookie the precautions I took were negated by having the wrong model on the TX.
But I don't think it would have made much difference because untill you experience it first hand the nose pitching straight up quickly most times you will loose .Show me some pic's of your damage and I'll show you mine LOL.

Welcome back Herb
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Old Aug 08, 2006, 04:05 PM
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@mediq:
I am still working on a fix with the manufacturer so a picture of your damage would be highly appreciated. Online or offline.

Oliver
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Old Aug 08, 2006, 05:52 PM
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Quote:
Originally Posted by WeMoTec
@mediq:
I am still working on a fix with the manufacturer so a picture of your damage would be highly appreciated. Online or offline.

Oliver
I sent you some oliver but I'll post some here you can see.
To anyone seeing these pictures they have nothing to do with either quality or construction of the Wemo Mig. But rather my dumb thumbs
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Old Aug 08, 2006, 06:13 PM
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It does not look that bad at all ... Mine's being worked on, but I am hopeful The K&A Mig is in good shape, I still have most of the tail (background) ...

The JePe Pyranha (largest piece left, blue in the background) might take longer to rebuild


.
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Old Aug 08, 2006, 08:19 PM
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That's too funny Herb

Yours looks like it can fly now I have to reconstruct the nose.
I was really looking forward to flying this mig, I saw your's fly and fell in love with it.
My wife say's maybe I should leave the mig alone LOL.
Until they come out with a 90mm F-100 the MIg-15 is my favorite it's like being in love with a girl and she doesn't love you back
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Old Aug 09, 2006, 06:48 AM
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Quote:
Originally Posted by mediq
...it's like being in love with a girl and she doesn't love you back
But at least you're in control, or at least should be.
How did you get the F-4?
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Old Aug 09, 2006, 11:37 AM
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I was on Markos waiting list for 3-4 months
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Old Aug 09, 2006, 04:09 PM
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Oliver

If I could get intake ducting That would work If fuses are tough to get..

Tony
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Old Aug 09, 2006, 04:54 PM
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Tony I check both options. The manufacturer will be back to business next week.

Oliver
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Old Aug 09, 2006, 05:17 PM
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Thanks Oliver
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Old Aug 10, 2006, 11:21 AM
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Herb

Did you damage the intake on your's?
I had to cut the intake back about 4" before the fan.
I 'm sure my diameter is off a few mm.
I used some ducting I had left over from the K&A mig and seems to work well will know more when I crank the engine on and see if amps go up
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Old Aug 10, 2006, 12:50 PM
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There was no major damage to the intake as my batteries are located in the fuse bottom. If you have the batteries sitting on the intake, they might tear throught it on a hard landing.
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Old Aug 10, 2006, 12:59 PM
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Yep they were riding side saddle now the have a channel on the bottom was very easy to get at the tray once the nose was off.
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Old Aug 11, 2006, 02:19 AM
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My Mig-15 is still ok, I just put the Lipos beside the tube, 2 left, 2 right and fix them in position with bubble plastic.
The Kontronik FUN 600-21 is the right motor for those birds with 90mm fan. Very light and powerful at 4s1p. (tested it in my Lip-20 with 90 mm EDF, the LIP goes vertical at 4 KOKAM 3200!)



Heiner
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Old Jan 19, 2007, 04:51 AM
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Hi there, Byam Wight from Canberra, Australia.

I realise this is a late posting but does anyone know the pros and cons of shaping the exit duct as shown on the CD.

My understanding is that shaping it to the fuselage will give significant down thrust. What is everyone doing in this regard. B.
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Old Jan 19, 2007, 05:25 AM
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You DO NOT want any downthrust. I sanded the fuse inner top to eliminate any downthrust, and it still has a bit of it left. It slightly pulls the nose up in the turns when I reduce the throttle a bit. Hope this helps hwh
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Old May 24, 2007, 04:27 PM
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Still trying to decide what Jets to bring to our local electric event in Costa Mesa on Saturday

http://www.1hss.org/contests/may2007phillydogff.pdf

Had a few circuits with the MiG-15 yesterday just to warm up the new Kokam LiPos

.
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Old May 24, 2007, 04:31 PM
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Decisions decisions ...

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Old May 24, 2007, 10:38 PM
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Bring all of them of course! And the F-86 too! and don't forget the havoc heli! we can have a race as we run after ours when the wind blows them away!LOL
See you there.
Bruce
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Old May 25, 2007, 12:26 PM
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Hope Mr. Chan will be there with his radar gun
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Old May 25, 2007, 10:15 PM
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I heard he returned from Korea, but I haven't seen him at the field recently.
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Old May 27, 2007, 12:07 AM
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Herb,
Nice flying with you today, I like how those TP5000extremes perform!
I didn't really appreciate your GWS P-38 outrunning my
Hyperion P-51 however!

Regards, Bruce
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Old May 28, 2007, 03:12 PM
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The MiG-15 needed some minor 3/4 oz cloth reinforcement on the intake duct just past the intake, as it was making some really nasty noises on power up. Yes the TP XS are going well, too bad they don't fit the MiG
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Old May 28, 2007, 04:53 PM
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Hello there,

Two weeks ago we had an F5b comp here so I put my 6S lipo powered MIG through the course. I did two runs each being 2.6 seconds which converts to 207kph or 125mph.

Byam.
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Old May 29, 2007, 03:45 AM
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Hi Byam and All.
I did hear that you ran the Mig through the course. I took the F16 to Jet action in Adelaide last weekend. The guys put the radar gun on the F16 and came back with 170 MPH~ 270 KPH. I was pretty happy with that!
Bill.
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Old May 29, 2007, 03:28 PM
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You guys are insane ... The MiG-15 is rated for < 100 mph ...

Anyhow the Mig is so sleek it keeps picking up quite a bit of speed if you do circuit after circuit. What's the upper limit I don't know, probably the fuse safely back on the field but the wings back at the parking lot
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