NanoBandit for brushless edf40 [Archive]

devmonkey

Oct 13, 2004, 05:32 PM

My super mite arrived from superflyrc today together with the brushless edf40 fan. I decided to leave the mite on the shelf for now and build something else for the fan.

So probably the smallest bandit todate, went together very quickly in about an hour then another to cover it. Still need to fit a tiny canopy.

Specs are
18" span, 17" long
empty weight 28g (solarfilm covering added 12g!)
AUW 130g with 3S 830 lipoly.

Joe

FAQ written by Tres Wright on this superb little jet.
http://www.rcgroups.com/forums/showpost.php?p=2881069&postcount=577

Arbo

Oct 13, 2004, 06:03 PM

Outstanding. Now I wanna see some video of that in the air. ;)

Good job.

Paul

FredN

Oct 13, 2004, 08:27 PM

I like it!!

Fred

SWAT1

Oct 13, 2004, 08:44 PM

where did you get it

alexpEDF

Oct 14, 2004, 03:40 AM

Very nice Joe, look forward to seeing it fly! :D

Alex

devmonkey

Oct 14, 2004, 04:30 AM

Thanks for the kind comments.

Model is built entirely from 3mm depron, the wing is flat plate and has a 2mm carbon spar. The transparent solarfilm makes the model look like it had a metalic finish on it, this doesn't show up in the photos because of the flash, need to take some pics in daylight.

I actually made two. The first one was trimmed to a minimum shape to accomodate the fan, batteries, and intake area then deconstructed to make templates for the second one.

These are very quick to build, they only have about 6 parts, most of the time is spent covering. If it flys well i'll make a load of them and we can do some highspeed nano combating ;-)

Joe

wireit

Oct 14, 2004, 10:47 AM

cool I want one

devmonkey

Oct 14, 2004, 10:59 AM

Does anyone have a cad model of a jet pilot I could have? I'll scale it to size and mill it on my cnc machine.

Cheers

Joe

p.s. would people be interested in templates for the nanobandit?

Cyberman

Oct 14, 2004, 12:02 PM

These are very quick to build, they only have about 6 parts, most of the time is spent covering. If it flys well i'll make a load of them and we can do some highspeed nano combating ;-)

Joe
*Humor*
Oh No it's the begining of the RC nano wars! Full scale RC combat (because the planes assemble in 60 minutes you can build 8 on a saturday!)

Unfortunately there is no missile launch system, they aren't legal, you'll just have to deal with the lasers ;)
*End Humor"

Looks nice what fan are you putting into it?

Cyb

Doc Dyer

Oct 14, 2004, 01:01 PM

p.s. would people be interested in templates for the nanobandit?

Yes Thanks, That would be Great :)

Bradley

devmonkey

Oct 14, 2004, 02:42 PM

Looks nice what fan are you putting into it?
Cyb

The one that comes with this kit

http://www.superflyrc.com/SF_Frames.asp?HeaderFrame=SF_Header.asp&MenuFrame=SF_Menu.asp&ContentFrame=SF_Home.asp

kicks out 5-6 ounces of thrust so thrust to weight should be well over 1:1 and about 250watts/lbs.

U812

Oct 14, 2004, 02:47 PM

Nice!

Steve

Arbo

Oct 14, 2004, 04:21 PM

kicks out 5-6 ounces of thrust so thrust to weight should be well over 1:1 and about 250watts/lbs.

I think it really kinda kicks butt that now, when talking about watts/lb, and quoting numbers like 250, it doesn't mean a $600 setup in an even more expensive plane... rock on.

Paul

Racebelly

Oct 14, 2004, 05:59 PM

Nice looking EDF!

Templates would be great.:D

-Mark

JimF

Oct 14, 2004, 10:13 PM

Would people be interested in templates?
Would PEOPLE be interested in templates?
Would people be INTERESTED in templates?

You had to ask!!! That's like asking if people sit in front of their computer at 11:14 on a Thursday night looking at pictures of EDFs.

Yes, I'd love templates. I was just fixin' to order one of those super mites myself. Time to go to Lipos!

Jim

roccobro

Oct 14, 2004, 11:16 PM

Of course we would be interested in templates. Maybe smooth out the intakes and some other little changes Devmonkey might suggest for the final run.

Justin

AirX

Oct 15, 2004, 06:57 AM

p.s. would people be interested in templates for the nanobandit?

Yup, that would be cool... :)

Eric B.

jet_jer

Oct 15, 2004, 07:34 AM

TEMPLATES! :P I'm game!

jer

jamin

Oct 15, 2004, 07:35 AM

YES, templates, flight reports, construction photos, specs....

We want it all!

devmonkey

Oct 15, 2004, 07:55 AM

I'll draw up the templates tonight.

I have now cut the hatches, installed the servos and fan, and added some more stripes. The entire nose comes off and the battery slides into the gap, then the nose is held on with a friction fit.

I need to extend the servo cables, roll the paper exhaust duct, connect the tailerons and make a canopy (any ideas?) then it will be ready to fly. I'll post some photos when I get back from work.

devmonkey

Oct 15, 2004, 08:29 AM

Wing loading is very respectable for an EDF (although most of mine are quite a bit larger than this). It has about 0.5 sq. feet of area so we are in the region of 9 oz/sq foot. Just can't imagine it going that slowly, though it feels light for its size with all the equipement installed.

Tres Wright

Oct 15, 2004, 09:02 AM

jperch

Oct 15, 2004, 09:16 AM

What about carving a tiny canopy out of the EPP scrap from the mite? It wouldn't be clear but you could paint it black or something. It would be very light especially if you hollow it out.

Joe

devmonkey

Oct 15, 2004, 09:36 AM

COOL JET! Yes, templates... muuuust haaaaaave templaaaates :) I'm really curious to see how fast it will go. My Mite was clocked at 46 mph at a fly-in last weekend. I would think something less draggy than the Mite should be good for well over 50 on the same setup. On the canopy, your best bet for one that tiny is to do a balsa buck and form one from sheet plastic yourself.

Cool, how was the vertical on your mite?

There will be a tailpipe on this that will probably increase efflux slightly, however it is already well over 100mph on this setup so is really just to clear the equipement in the rear of the plane.

Tres Wright

Oct 15, 2004, 10:16 AM

devmonkey

Oct 15, 2004, 10:32 AM

I measured 5 oz. thrust and the Mite weighs 4.8 oz., so the vertical isn't huge or anything, but it will go vertical for a short while. It seems to like a 60 degree climb angle a lot better, it'll do that without wimping out as it does going full vertical.

==it is already well over 100mph==

Nice! Is that measured through the ducting or out of the jet? What do you think on the flight speed, maybe 65 or so?

I got that figure from the testing that has been done in this thread
http://www.rcgroups.com/forums/showthread.php?t=278331

Anything over 50mph will look ballistic with this size model.

Going to do two sets of templates, one for edf40 one for edf50.

dave morris

Oct 15, 2004, 10:40 AM

hmmm I wonder if I can fit retracts on it?

great work, use some blue foam, hollowed out it will weight negative oz.

Tres Wright

Oct 15, 2004, 10:43 AM

==Anything over 50mph will look ballistic with this size model. ==

Absolutely! That's the fun of it! The guy that clocked my Mite couldn't believe it, he thought it was going a LOT faster :)

devmonkey

Oct 15, 2004, 08:13 PM

I have drawn the parts in Rhino so they should fit accurately. I exported the templates to a dxf which is posted here. I have also rendered some images of the constructed model so you should see how it fits together, all very simple really.

This is scaled for the edf40, 830 3S combo and small servos. All parts are 3mm depron, wing has a carbon rod through it (2mm on mine).

Enjoy,

Joe

devmonkey

Oct 15, 2004, 08:14 PM

Here is the model put together, sorry or the colours but it helps show which parts fit inside others.

devmonkey

Oct 15, 2004, 08:17 PM

The curved yellow section at the rear of the canopy is just a couple of layers of depron sanded to shape, I found it easier to construct this on the forward top piece before gluing it to the rear top - stops you hitting the top of the model with the sanding block.

AirX

Oct 15, 2004, 08:28 PM

Joe to sand depron and not cut something you dont want to sand just put some clear tape down arround the area and sand till it is finished the tape will not let the sandpaper cut the foam beneath it. I used this on my 757 and the S-54 works great.

Cheers,

Eric b.

BTW thanks for sharing the plan, this is such a neat little plane.

roccobro

Oct 15, 2004, 09:36 PM

Yes, thank you very much. Now, how am I going to work this into my build schedule...

Justin

Arbo

Oct 15, 2004, 09:41 PM

Thanks for the plans...

SWAT1

Oct 15, 2004, 10:47 PM

Can anyone convert them to PDF?

devmonkey

Oct 16, 2004, 05:12 AM

6 A4 PDFs zipped up, there are a couple of 100mm scaling markers so you can check your print out is correct.

Appie

Oct 16, 2004, 05:40 AM

Joe,

VERY, VERY NICE :D

I just dowloaded the plans, looks like an easy build. Mmmh i still have a couple of EDF 40's lying around, i may have to give this one a try :cool:

Cheers,

Appie

SWAT1

Oct 16, 2004, 12:37 PM

Thanks devmonkey

jamin

Oct 16, 2004, 06:42 PM

Would the EDF-40 CN12-RXC stand a chance in the plane?

Tres Wright

Oct 16, 2004, 08:48 PM

THANK YOU!! Wow, there are a lot less parts than I thought there would be :)

Now how about a flight report? :D

netmechanic

Oct 17, 2004, 02:21 AM

Were are you setting the CG?

W@CC0

Oct 17, 2004, 03:26 AM

Would the EDF-40 CN12-RXC stand a chance in the plane?
same question here.
and how did you coverd her. just ironned the solarfilm on it??
thx for making the plans available. this really is a cool project.

did she flew allready because I really am curious.

grtz

Tom

btw did I said this is a cool project :p

devmonkey

Oct 17, 2004, 06:43 AM

THANK YOU!! Wow, there are a lot less parts than I thought there would be :)

Now how about a flight report? :D

Just got back from a windy wet field, and yes it did fly and flew well. Took a while to get it sorted out though.

Wind ~15mph
1st flight: Slight push into wind, went straight up flipped over and landed upside down about 10feet in front of me on its fin. No damage, cofg too far back.

2nd flight: cofg moved forwards, slight push into wind and she's away. Climbing at about 40 degrees. Tailerons are not responsive enough in the roll and nose is ducking on every turn. Land after 2 mins.

3rd flight: Dialled in 50% differential on roll, increased roll deflection to about 30 degrees. Flew much much better, fast, smooth even in the wind (no-one else was flying at this point because it was too windy ;-). Did a lot of fast low passes and landed after 10mins.

Recharged 600mAh back into the 830 cells after these flights.

4th flight: wind had dropped slightly so tried some slow speed stuff, slows down to a fast walking pace. Lots more fast low stuff then landed after 12mins. Batteries aren't even warm.

Flys on less than half throttle, vertical is not great but I can probably tune this up. Flat out is probably about 50mph, looks quite quick but is easy to follow.

Hopefully we can get some video done this week weather permitting.

Joe

cyberbipe

Oct 17, 2004, 07:03 AM

Thanks for the templates this looks cool. Congrats on your maiden flight.
Could you please post some of your findings on CG location and how about some pics. of your paper ducting and hatches. I have 2 EDF 40's and mhy two boys think they can't live without one of these little jewls.
Thanks again for the templates
Michael

devmonkey

Oct 17, 2004, 09:22 AM

Some more pics. The nose comes off and is held on by the friction force of the battery (plus a bit of tape if you don't completely trust this). I have put some ply tabs top and bottom of the nose to help alignment.

Reciever fits inside the open ended splitter plate, just behind the battery. ESC is next to the fan.

Servos are recessed into the bottom. The duct is rolled paper and is held in place by a 1/16" balsa former glued to the back of the model, I used a circle cutter from the art shop to cut the hole.

All leads are taped to the top or bottom on the inside fuselage, on the next one i'll route them though the foam behind the cockpit. I had to cut the top of the fuselage to tape the wires, the glue it back on.

CofG is 50mm behind leading edge.

Most important thing is the roll differential, without this the model will not fly properly.

devmonkey

Oct 17, 2004, 09:28 AM

There is a small hatch in the top to get to the fan and esc. I cut slots in the hatch and fuselage bottom to accept the fan lip, fan is then hot glued to the fuse floor like the servos.

roccobro

Oct 17, 2004, 10:24 AM

cyberbipe

Oct 17, 2004, 11:41 AM

Thanks for all the info I think I may try to put one of thes togeather this afternoon. :D If I do I will post some pics.and proibibly more ?s
Michael

niels polfliet

Oct 17, 2004, 01:31 PM

Does it really need the solarfilm? I guess its strong enough in just bare depron finish? It really looks cool, thanks for the templates! :)

Niels

devmonkey

Oct 17, 2004, 01:36 PM

I'm getting 120g thrust at the moment, plane weighs 150g which is slightly more than I wanted mainly because of wiring. I am going to make another but 12% larger so I can fit an edf50 with cdrom motor. This should weigh about the same and have 220-250g thrust.

Can anyone point me to any proven cdrom edf50 conversions? Something that draws about 10A on 3S.

devmonkey

Oct 17, 2004, 01:38 PM

Does it really need the solarfilm? I guess its strong enough in just bare depron finish? It really looks cool, thanks for the templates! :)

Niels

No it doesn't need solarfilm, and it doubled the weight of the airframe. However I hate bare foam planes as they dent too easily. Maybe i'll get some light film for the next one.

If you don't cover it, it'll only take an hour to build.

devmonkey

Oct 17, 2004, 01:43 PM

What is the diam of the exhaust? Is it at 100% FSA? The thougth of getting a little better performance from a smaller outlet makes this sweet plane look even better!!

Keep the pictures comming!

Justin

It is about 38mm which is close to the FSA. Does anyone know if these fans perform better with a constricted exhaust? I think the 120g thrust i'm getting now is probably close to what can be achieved with this unit inside a model. It is only 2g off what others are measuring without any ducting at all.

We need to pour more power into the motor (which this can't take) or use a cdrom motor to go vertical. I only have larger stators so will be building an edf50 cdrom conversion.

papasmurf

Oct 17, 2004, 01:45 PM

he has converted the GWS edf's to CD-ROMs and has some info on windings and amp draw. I am converting one at the moment for a PCW and for the plane mentioned in this thread. Will regular FFF be too heavy? I will sand it down alot. I was thinking about going with CF tape on one or both sides of the wing instead of the tube. I think I would prefer ailerons and a conventional tail setup also so I may try that.

niels polfliet

Oct 17, 2004, 01:46 PM

Ok, thanks.

any proven cdrom edf50 conversions? Something that draws about 10A on 3S.

20 mm stator, 8-10 winds of the thickest wire that fits, 6 pole magnet. thrust +- 200gr with 7A.

Would be interested in a little larger version too, have a bunch of etec 1200 packs and an edf55 laying around...

Niels

AirX

Oct 17, 2004, 03:36 PM

The fan will always perform better with a conical shaped exhaust with the area at FSA or slightly less. When just using a tubular shaped exhaust efflux velocity suffers as the air that is squeezed thru the motor holder and shroud expands to fill in the area after the fan. The fan will even produce better without the tube as long as there is no outer section for the air to expand to such as a podded setup will produce but even then if there is tube extending past the motor the airflow will slow as it expands to fill in the area differences.

Cheers,

Eric B.

Added Comment: 38mm should be ok for the outlet diameter without choking the fan down too much

devmonkey

Oct 17, 2004, 03:41 PM

Hi Niels,

Is that with the 3 or 5 blade rotor? Did you double up the magnets, 2 per pole?

I don't have an edf55 to hand so can't give you the scaling. Basically the front of the fan is level with the back of the wing, and the fuselage is made just wide enough so the shroud touches the sides. You should be ableto scale the dxf to size with that info.

If the edf55 has a 1mm housing wall then you should scale the plan up by 22%, giving a ~ 22" span. How much thrust can you get out of a 55 at 10A?

Tres Wright

Oct 17, 2004, 03:56 PM

Great flight report! Sounds like a fun little jet! Shame it won't go vertical, but sounds like it can handle wind impressively well.

==I think the 120g thrust i'm getting now is probably close to what can be achieved with this unit inside a model. It is only 2g off what others are measuring without any ducting at all. ==

I measured 145 grams on mine installed on the SuperMite (strapped the whole thing to my thrust stand). I doubt it'll generate much more than what you're seeing through ducting though.

niels polfliet

Oct 17, 2004, 04:08 PM

Its with the 2030 prop, 3 blade. 5 blade gives higher thrust, but i think the 3 blade is more efficient, giving more speed. double magnets indeed.

I already scaled up the dxf file by 25%. I'm having problems to print it now, since i've never drawn larger parts than one page yet. I'll figure it out, hope I can get it printed.

Its a long time ago I've measured my oldest edf55's thrust, it was around 210 grams, but already pulled 8A. Never really experimented further.
The latest one I made for aircraft world had 150 grams with only 5 amps on 3S, pretty efficient. I'm now experimenting with other winds on this motor, i hope to get at least 250 grams on 10A.

btw, do you think a 25 % larger model can handle +-200gr aow? I guess i should use 5mm depron for the wing then? I really want to use an etec 1200 pack(85g)...the fan/motor weights 43g

Niels

shschon

Oct 17, 2004, 04:22 PM

[/QUOTE]
Most important thing is the roll differential, without this the model will not fly properly.[/QUOTE]

What is roll differential? Is it just dial in more travel in aileron while keeping the the elevator travel low in the elevon mixing?

devmonkey

Oct 17, 2004, 04:24 PM

btw, do you think a 25 % larger model can handle +-200gr aow? I guess i should use 5mm depron for the wing then? I really want to use an etec 1200 pack(85g)...the fan/motor weights 43g

Niels

Definitely, 25% larger model gives you 56% more wing area.

devmonkey

Oct 17, 2004, 04:26 PM

Most important thing is the roll differential, without this the model will not fly properly.[/QUOTE]

What is roll differential? Is it just dial in more travel in aileron while keeping the the elevator travel low in the elevon mixing?[/QUOTE]

No it means more up aileron than down. Didn't use the term aileron differential since this model doesn't have ailerons.

soundman

Oct 19, 2004, 07:07 AM

I went out flying with Joe (Devmonkey) yesterday & grabbed some video footage.

The video is only short, but will give you a good idea of the performance so far.

It's a 4.6mb wmv file - please download to your drive before viewing.

I apologise for some of the wobbly camera work - it was a little tricky to keep up with it :rolleyes:

i've started to build one for myself for an EDF50 - it'll hopefully be finished this week....I'll post some pics & info when I'm done.

Frenche

Oct 19, 2004, 07:24 AM

Where is the vid?

devmonkey

Oct 19, 2004, 07:26 AM

whoops, here you go

http://www.onlycells.com/gallery/misc/NanoBandit.wmv

soundman

Oct 19, 2004, 07:41 AM

Doh!

Sorry - that's what happens when the phone goes in the middle of writing a post :o

netmechanic

Oct 19, 2004, 08:33 AM

Whats the motor again?

Arbo

Oct 19, 2004, 08:37 AM

Wow... nice video. That think is a little rocket ship. Great job.

Paul

Tres Wright

Oct 19, 2004, 08:47 AM

devmonkey

Oct 19, 2004, 08:52 AM

Whats the motor again?

Its the Feigao 6kv 12mm motor. Pulls about 6A on 3S.

I just realised I have a couple of spare microfans and a b20 12L at home plus a load of 3S irate 1800 packs. This combo would put the weight up to 270g, with a slightly larger model. How much thrust would I get?

This probably isn't the best combination for these packs and fan, I really would need a hotter motor to get 18A(10C) into the microfan on 3S.

Can anyone recommend a setup that will put 18A on 3S (50-55mm fan)?

Cheers

Joe

devmonkey

Oct 19, 2004, 08:55 AM

==Whats the motor again?==

GWS EDF40 with a 12mm Feigao 6k brushless motor. Superflyrc.com sells the motor preinstalled in the fan, I think it's 50 bucks.

Coooooool video! Man, that thing scoots! Looks like it's quite a bit faster than my SuperMite. How do you think it would do on ailerons/elevator instead of tailerons?

It doesn't actually seem that fast when flying, certainly not too quick. Ailerons would be better but difficult to fit on this model. On the next one i'll make the tailplane span anout 30% longer to give more roll.

InTheLift

Oct 19, 2004, 09:19 AM

Nice devmonkey! That little thing really rips. :)

Tres Wright

Oct 19, 2004, 09:45 AM

It looks like the ailo servo could go dead center facing down, and torque rods could be used. I'll add a skid to keep the linkage from getting torn up on landing. The way you've ducted it leaves a nice spot in the middle for a servo :) It looks like a rod can be run across to join the elevator halves, so that shouldn't be too difficult. I just finished another project, so I may be able to start this one very soon. Looks like I need to order another Feigao :D Do you have any kind of cooling holes in the nose for the battery pack?

devmonkey

Oct 19, 2004, 09:58 AM

Do you have any kind of cooling holes in the nose for the battery pack?

None, but the battery isn't even warm after 8mins, I haven't actually measured the current, I might try advancing the timing on the Pheonix. The original idea was to cut a hole under the nose so the fan would draw air over the battery since the splitter plate is open, however this is not needed.

andyUK

Oct 19, 2004, 10:03 AM

Hi dev

Great plane - great video - Next time i may see you at the scrubbs and see it live.

And for those of you in UK - the motor is available as www.robotbirds.com

Andy

KSU Flyer

Oct 19, 2004, 10:16 AM

That was awesome! Must get 6000 rpm/v Feigao for Mig 15!!!

AirX

Oct 19, 2004, 11:54 AM

Joe,

that thing scoots... :)

Eric B.

titaniumracingt

Oct 19, 2004, 03:22 PM

That is the baddest butt thing i've ever seen! I'm ordering stuff to build one right now!

niels polfliet

Oct 19, 2004, 04:17 PM

started building mine!

Enlarged it to 22.5 in wingspan, so the edf55 is a snug fit.
Building a new motor for it right now, I really want more than 150 gram thrust for this bird.:) .

It indeed took me about an hour to built it, now just have to glue the upper deck when the fan is built in.

The frame weight is now 22 gram.. :rolleyes: pointing on less than 200 gram aow with 3S etec 1200 and a 43 gram brushless edf55.

I'll post a pic of my installation tomorow..

Niels

devmonkey

Oct 19, 2004, 05:26 PM

Excellent Niels,

How much thrust could you get from the 55 at 10A on 3S? Maybe you could convert one for me? How much?

Joe

AirX

Oct 19, 2004, 07:11 PM

About 10oz at 14amps from my calculations using the two I have.

Eric B.

BellX1

Oct 19, 2004, 07:33 PM

Very cool plane! I have the supplies to build one of these, but I only have 1320 mah 3 cell li-po's. They weigh 2.9oz. Do you think these will be too much weight for this plane?

Kevin Cox

Oct 19, 2004, 08:00 PM

Very nice Joe!

titaniumracingt

Oct 19, 2004, 08:56 PM

dave morris

Oct 19, 2004, 10:01 PM

just watched the vid, great job, I will be building one soon.

stumax

Oct 19, 2004, 10:08 PM

Too cool!

Stu.

Tres Wright

Oct 19, 2004, 10:45 PM

==They weigh 2.9oz. Do you think these will be too much weight for this plane?==

It's on the heavy side, but it would likely still fly OK. I'm going to be using a 3s 730 TP pack which weighs in at 1.6 oz. This TP pack works great on the SuperMite with the same Feigao/EDF40 fan setup. I get 7-9 minute flights on it.

Joe, it's amazing how much the excitement level ramped up after you posted that video! If a picture is worth a thousand words, a video is worth 100K at least ;)

AirX

Oct 19, 2004, 10:48 PM

ok so I have the parts coming in a few days. I've decided to build the 55 version, but I have some questions. How many winds would ya'll recommend for a edf55? Also are there any threads/how-to's on building CD-ROM edf motors? Thanks guys!

It would depend onthe battery you want to use, for 3s i would go at least the equivalent of the Himax 2025-4200 and if you really want speed use the equivalent of the Himax 2025-5300. Use a heat sink on the 5300 and make sure you get enough battery for the amp draw.

Eric B.

AirX

Oct 19, 2004, 10:52 PM

Joe, it's amazing how much the excitement level ramped up after you posted that video! If a picture is worth a thousand words, a video is worth 100K at least ;)

Yup, I'm excited... :eek: :D
I have the makings for a 55 and will run one soon. I would also like to get the EDF40 and the Feigao motor, who sells these two together?

Cheers,

Eric b.

Tres Wright

Oct 19, 2004, 10:57 PM

==I have the makings for a 55 and will run one soon==

You go Eric! :D

SuperflyRC.com sells the Feigao preinstalled in the EDF 40 unit for 50 bucks. Quite reasonable considering the motor alone goes for 40 everywhere.

Incidentally, if anyone is buying the motor separately make sure you get the 6k motor, not the 4k motor. The 4k motor would roast if run in the fan. The 6k motor hasn't been out long and currently is somewhat hard to find.

AirX

Oct 19, 2004, 11:12 PM

Thanks Tres,

I will look into SuperflyRC.com and see what is up. The advent of the 12mm motors has made the little fans more appealing for sure.

Cheers,

Eric B.

blucor basher

Oct 19, 2004, 11:51 PM

I've been messing w/ the edf 50 and 55 on the superfly planes.

The 50 flies great on the Flea w/ 16 turns delta, 6 poles.

The real kick is the 55 w/ 17 turns delta, custom single-stator can and 2mm thick magnets. You wil need a 25 amp controller, though.

niels polfliet

Oct 20, 2004, 09:58 AM

Here's how far I am now.

I've milled the edf55 duct to be square, otherwise it wouldn't fit into the fuse. :rolleyes: . I didn't remove the whole inlet ring, to leave as little gap as possible. everything but the reciever and 2 servo's+ connections weights 164 grams...190gr aow should be possible...I really hope i stall have 1:1 thrust :)

Also finished my motor today. 10 winds star configuration. on a fresh etec 1200 pack it pulls 10.2A and 241 gram thrust, quickly dropping to 9.8A an 218 gram. This is with the duct milled square, if you leave the inlet ring intact you'll probably have more...Other pack will possibly also give more juice, since this is the first generation of etec packs, which drop much voltage under load. The motor gets warm from the test running, and it doens't have much cooling, but when i see smoke I'll just stop, no problem ;) . Also made a nice uitlet cone. The whole fan with motor now weights 45g

If you want some info on how i make my edf 55 motors, look here.
http://aircraft-world.com/prod_datasheets/cdmotor-edf55.htm
Please note i didn't use the aircraft-world cd-motor, mine's a bit larger. If you want I'll experiment futher with it to see how much i can get from the aircraft-world motor. (andeuh, ignore the "I was the first to try" thing in the sheet. I'm not such an ******* in real life, I was just a little pissed when i wrote it ;) )

Btw, how much thrust does a fegao produce with 3S, what current? My cd-rom edf40 (see the "cd-motor in 50 mm homemade ducted fan thread") gives 100 grams at 4A if i remember correctly...

@ devmonkey, i'll check if i have a similar motor in my stack of cd-motors, if i have I'll convert you one.

If everything goes well i should have it ready by saturday :)

Niels

titaniumracingt

Oct 20, 2004, 11:39 AM

Is this on a 22mm or 25mm stator?

niels polfliet

Oct 20, 2004, 11:44 AM

20.6mm stator. Out of a cd-rom drive, like in the good old days, not gobrushless ;)

Niels

devmonkey

Oct 20, 2004, 11:44 AM

Awesome Niels, milling the intake square is pure genius.

Did you use 3mm or 6mm depron in the end?

Are you going to cover it or just fly it as it is?

German_wing

Oct 20, 2004, 12:20 PM

We want to see a movie of this bird! plz

testpilot

Oct 20, 2004, 12:25 PM

Could the GWS EDF-40 be used instead of the brushless?

niels polfliet

Oct 20, 2004, 12:25 PM

Its all 3 mm with a 2mm carbon rod. I planned to make the wing 5 mm, but I tried the 3mm and it seems stiff enough to me.

Going to leave it as it is for now. Maybe I'll paint it with some black markers if it flies ok, but that are worries for later...

Can you tell me at how many % the CG is? Then I know where to place the components. I'd like to place the reciever in the tail, far away from the esc and motor...

Niels

Doc Dyer

Oct 20, 2004, 01:12 PM

movie posted on post 64 ish page 5 :)

Niles,

using his scale and 50 mm I get approx 41.244% of wing chord

Bradley

power

Oct 20, 2004, 02:19 PM