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Apr 11, 2002, 09:08 PM
Registered User

Need input regarding twin edf300 design project


Hi all. Im cooking up a design for twin edf 300 power. I want it to be similar to a hotliner aerobatic glider. Im wondering how much weight can a pair of these fans carry. The plane will be hand launched, and should be able to loop from level if this is possible. I plan on using standard spd 300 motors, and an 8x600ae nicad pack to power both fans. I think I can keep weight down around 18 ounces. Also,, what kind of wing loading should I shoot for to be sure the model is fast like a df should be, and yet be no problem to hand launch? Thanks!
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Apr 11, 2002, 09:22 PM
EDF all the way!
bruff's Avatar

EDF 300


I'm using a WeMoTec 300 fan in a EJF Minx. It has a flying weight of 18 oz. I'm using a 280 BB on 10 600 AE. No problem looping from level flight. This plane flies very well. Good luck with your project.
Bob Ruff
Apr 12, 2002, 08:25 AM
Registered User

surprizing performance


Bob, thanks for the info. It sounds like the little edf 300 is much more powerful than I expected. I would have never guessed that a single edf 300 would support 18 oz of flying weight and be able to loop from level. This broadens my limits a bit. I am pretty sure 18 oz is doable with twin fans and a single pack of 8x600ae, but I may just go a bit bigger, and use slightly larger cells now. I think twin edf 300 may have been pushing those 600ae a bit hard anyway.
Apr 12, 2002, 08:37 AM
Speed Demon
GregG's Avatar
I would also have never thought this would work. I'm glad to hear different, however. Bob, how many amps does it pull?
Apr 12, 2002, 08:40 AM
EDF all the way!
bruff's Avatar

AMPs


The Minx is pulling 9 AMPs fresh off the charger.
Bob Ruff
Apr 12, 2002, 10:28 PM
Registered User
dave morris's Avatar
The speed 300's draw a lot of current, a twin setup may be a bit much for 600ae's. I would plan to use 1300cp cells think that would add about 5oz over a 600ae pack using 8 cells.