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Foam Board Jenny

Daniel Kezar

Ultimate Cheap Skate
#41
I just designed it around whatever I had at the time. It used a 3007, 1100Kv Hobbyking Donkey motor turning a 9x4.7 Slowfly prop. A 3s battery was a bit too powerful but it flew nice on a 2450ma 2s running a 30Amp ESC. Servos were 5 gram but 9 gram might be a better idea. To sum up:

Motor: 1100KV Brushless Motor
ESC: 30A Brushless
Prop: 9x4.7 Slow Fly
Battery: ~2500ma 25-30c 2s
Servos: (4) 5 or 9Gram servos

I stole all the electronics from this plane for another project I'm working on, but someday I'd like to build an improved Jenny 2.0 so I can add a step-by-step build log for it.
ok. do you think it would downscale well for a 2213 935kv with 20 amp esc and 9x4.5 prop running 1000 3s? 9g servo of course
 

Tench745

Active member
#42
The setup as is gives theoretical values of:
Thrust: 11.2oz
Stall Speed: 14.5 MPH
Max Speed: 26.7 MPH
Amp draw: 6.2A

Your setup would give you:
Thrust: 21oz
Stall Speed: 14.5 MPH
Max Speed: 36.3 MPH
Amp draw: 8.25A

I think this would work, but can't promise anything without trying it. You will most likely need to add some nose weight to get the balance correct.
If you do attempt to build this, I'm happy to answer questions and may end up building along. No promises though, I'm out of storage space. ;)
 

Daniel Kezar

Ultimate Cheap Skate
#43
The setup as is gives theoretical values of:
Thrust: 11.2oz
Stall Speed: 14.5 MPH
Max Speed: 26.7 MPH
Amp draw: 6.2A

Your setup would give you:
Thrust: 21oz
Stall Speed: 14.5 MPH
Max Speed: 36.3 MPH
Amp draw: 8.25A

I think this would work, but can't promise anything without trying it. You will most likely need to add some nose weight to get the balance correct.
If you do attempt to build this, I'm happy to answer questions and may end up building along. No promises though, I'm out of storage space. ;)
haha! thanks for the info! you should submit this plane for the card game (if you haven't already). you have all the specs!