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Old Oct 08, 2009, 12:31 AM
Doppler wrangler
hyperdyne's Avatar
Joined Sep 2007
717 Posts
I have an 80A esc in my stryker. First had a mega motor.

Now I have a medusa motor in my stryker. Worked well on a 6x5.5 apc prop. I went to my 6.5x6.5 graupner speed prop since I just got a couple of these 40C 4s 2350 batts. The batteries are hellacious! Man they hardly get warm after a full throttle run.

Anyway, first run went well. Second run the next day I cooked the medusa motor. Smoke came pouring out of it. But man that stryker was scary fast. I blew by some gassers in their nitro planes.

Battery was not even bothered by this. Anyone have a motor recommendation that will take 60-70A on my speed prop?
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Old Oct 08, 2009, 02:28 AM
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Hi all,

Medusa has gone out of business, so you cannot get anything repaired there.

MicroDan has said that he would rebuild other motors than his own brand(gobrushless.com). I heard that from multiple sources.

__________________________________________________ _______

***

MEGA has made 16/30/X and 16/35/X motors and they test 2000W static ...usually with 20-25% discharged battery if it is great battery. They have been tested by me and my friends and have been bought be several folks….I know them all.

16/30/2 2130KV (tests 2225KV-2250KV) at 100-110A on 3S-5S
For high power: 3300 30C min, up to 3850 45C
max 5S prop same as 4S on motor below

16/35/1.5 2700KV (on 4S tests 2800KV) at 140A on 3S-4S
For high power: 5000 30C min, up to 4400/5000 45C
max 4S prop: APC Pylon 6.5X6.0 even 6.5X6.5 if you really know what you are doing with huge heat sink.

*********In airframes other than a Stryker expect lower AMP capability due to reduced air flow for motor cooling.

Send me a PM and use wattmeter. Motors available for sale from only one MEGA dealer.
Both motors are available in regular 3.2mm shaft or the 5mm Combat shaft at no extra charge.

Expect 140MPH to 150+ MPH pending your Stryker build at "sea level" !!!!!


Gryphon
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Old Oct 08, 2009, 10:38 AM
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Looks like MEGA is making a 16/40/xx sized motor now and a new 16/25/1.5 motors now too. Do you have any specs on these?
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Old Oct 08, 2009, 12:58 PM
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tho98027,

There is no 16/40/x unless someone did a type error. Where did you see such a thing? Wishful thinking? Show me a link and specs for it.

16/25/1.5 is available with (2) different KV and resistances.
3700KV @ 0.006 ............and 2990KV @ 0.007

There are (2) 2990KV motors on the way to USA, and one of them is spoken for. More will be ordered after that.


Gryphon
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Old Oct 08, 2009, 03:30 PM
Doppler wrangler
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Where can I get one of those 16/30/2 motors?
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Old Oct 08, 2009, 06:04 PM
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hyperdyne,

Let me get the link in a few minutes, and I'll PM you ASAP.

Resistance is .008 Ohms and weight is 135 grams, lenght is 51.5 mm.
( That is 4.5 mm longer than a standard 480 16/25/X which is 114 grams )


Make sure to specify the size of shaft that you want, and it would be 2 week to build one if they are not on hand....and 1 week in to get it to USA.


Compare that with other manufacturers that take 6-8 weeks to only build the motors...add shipping time on top of that.


***All of the 16/30/X and 16/35/X motors have 5mm shafts inside, but if/when you order 3.2mm; the outside part of those shafts get ground down to 3.2mm prior to assembly. It is machined nicely with a nice little curve instead of sharp 90 degree….PERFECT. Thumbs up.


Gryphon
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Old Oct 08, 2009, 09:30 PM
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Quote:
Originally Posted by GryphonRCU
tho98027,

There is no 16/40/x unless someone did a type error. Where did you see such a thing? Wishful thinking? Show me a link and specs for it.

16/25/1.5 is available with (2) different KV and resistances.
3700KV @ 0.006 ............and 2990KV @ 0.007

There are (2) 2990KV motors on the way to USA, and one of them is spoken for. More will be ordered after that.


Gryphon
It's on the czec website. Go to www.megamotor.cz and it's in the czec language. If you click on the link to read it in english it's not updated. But it is in czec. No specs shown yet. Plus it looks like they have bigger version of the edf 120 motor too for 12s instead of 10s.
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Old Oct 08, 2009, 11:13 PM
zoom zoom
gotboostedvr6's Avatar
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Joined Oct 2007
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hmmm 40mm now thats something i would spend a few $ on haha


I know Gryphon/Mopar will be all over this!
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Old Oct 09, 2009, 01:12 AM
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tho98027,

I got to the bottom of it after much searching of various links.

You saw:

MEGA AC 16/30/x , 16/35/x 16/40/x:
MEGA AC 16/30/1
Střídavý elektromotor pro pohon soutěžních modelů lodí v kategorii ECO EXPERT ( MEGA AC 16/30/1, lodní šroub 30 mm, vodní chlazení hliníkovou trubičkou, regulátor 66A, LIPOL 7,4V 5000 mAh)

MEGA AC 16/35/1,5
Speciální střídavý elektromotor pro pohon soutěžních modelů v kategorii F5D, na 5 LIPOL.

MEGA AC EDF 120 II
Nový střídavý elektromotor pro pohon elektrodmychadel o průměru 120 mm na 8- 12 LIPOL, 3 kW, hmotnost 515g
MEGA AC F3A 2,5Kw

______________________

The 16/40 refers to that EDF motor....should not have been called 16/40/X

I also called MEGA motor USA and there is no 16/40/X , So that mistake needs to be corrected and an e-mail regarding that has been sent.


Also on the very top line in that paragraph when you see:
"MEGA AC 16/30/x , 16/35/x 16/40/x" if you click it, it is a short cut to this link:

http://www.megamotor.cz/v3/script/de...c4884acf3e038b

Now see the top of that page....no 16/40/X

you got all of our hopes up....but at least you caught a mistake though.


16/35/2 is in testing phase though, so you let the cat out of the bag... It is 1890 KV not 1840 KV , now how did I know that? Shhhhhhhhh
The resistance of that one and 16/35/1.5 is less than advertised



Gryphon
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Old Oct 09, 2009, 03:48 PM
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I don't think Ken knows that much and never seems to be up to date on things. My guess is that Dan is still updating his website. We'll see.
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Old Oct 09, 2009, 04:07 PM
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tho98027,

I totally know what you mean and agree with you.


Things have changed in the last few weeks. I've been stirring the pot.

Ken has the latest spread sheet from Mega and knows about all of the new motors.

He (Ken) almost updated his web site 4 days ago, but is awaiting agreement/word from MEGA on how to name/code some of the motors.

For example the 16/25/1.5 being available in (2) KVs with different resistances.

Also, you will probably see an extra option for all of the 1.5 turn options (16/25 & 16/35) to be able to get them at slightly lower resistance than normal for added $10 or so due to the extra labor intensive winding option (code X or something else???).

Due to such special options, they need to figure out codes such as "C" for Combat 5mm shaft, or "E" as in some 22/X/X series motors. New letters to differentiate the two 16/25/1.5 turn KVs (3700 & 2990) (possibly R vs S), etc....

Expect his web site to be updated soon...so now he really does have the latest information.


You never know what next year holds in store...hopefully 40 length or even bigger motors.



Gryphon
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Old Oct 09, 2009, 09:20 PM
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Good News! I'm glad there are going to be some changes. Ken definately needs to revamp his website. I'm glad there will be some custom options more readily available. Hopefully, we can have the option of adding a integral fan in any motor we choose aswell. Sounds like they are playing with both "Y" and "D" winds. I've got to see this new spreadsheet. My guess is the edf 120 II motor is something like a 22/60/1.5E base off of the current 22/50/2e.
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Old Nov 04, 2009, 02:26 PM
You down with EPP?
johnnyrocco123's Avatar
Houston, Tx
Joined May 2009
6,853 Posts
Stock Stryker To the Limit

I'm building my fourth stryker as we speak. I replaced the cheesy spars with
.210 Carbon and A-framed it across the motor mount. I sanded it down and got rid of the fake air scoops. Point being, I guess the next step would be to glass it, but it seems like such a pain and I dont' know the first thing about it. SO..... How fast do you think I could push this thing with a ARC 28-47-1.5 without it breaking up on me? .. without glassing it of course. Or maybe just glassing the bottom?
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Old Nov 04, 2009, 03:38 PM
Philippians 4:13
Seward, NE
Joined Nov 2006
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as long as you don't pull out of anything while going WOT, you can go as fast as you want :-) I never reinforce anything because I only fly fast while going straight and level.
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Old Nov 04, 2009, 03:58 PM
You down with EPP?
johnnyrocco123's Avatar
Houston, Tx
Joined May 2009
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Quote:
Originally Posted by ty_horn View Post
as long as you don't pull out of anything while going WOT, you can go as fast as you want :-) I never reinforce anything because I only fly fast while going straight and level.
Yeah, I was thinking the same thing. Except I can see that the stock elevons will not hold up for long. I better go to balsa elevons and then I think I will be good.

Ive only gotten to 85mph on level passes and they started to give out.
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