Planes > Electrics
New build - RCME Bambina
angry_muppet:
The prop will be a 6x4, as recommended.
Not sure of the all-up weight, but electronics are about 200g. I guess the airframe will be at least 300-400g?
angry_muppet:
Seems my guess-timation is way off! Design weight is 300g (10.5oz in real measurements ;)) with a wing loading of 9oz/sqft.
Spec is:
31" wingspan
189sqin wing area
10.5oz weight
9oz wing loading
24" long
2050kV 2321 motor
6x4 prop
350-500mAh battery
11A peak power
Power/weight: 189W/lb
Happy Days:
Ha!,at full throttle she'll be very fast I'd say.
It'll either put a smile on your face, or something less welcoming in your pants! :)
angry_muppet:
I'm making loads of mistakes... :-[
Power is 120W, but that's 189W/lb! ??? I can see visions of underwear filling moments already!
I got the recommended motor delivered yesterday... The mounting bracket is MUCH too big for the firewall. Thankfully the screws are long enough to mount the motor directly to the firewall. Downside is that the cowling I'd already made won't fit around the motor. Today's job!
Quick question; is it sufficient to just secure the control snakes as is, or would another retainer at the end of the fuselage be recommended? I'd be of the tendency to over-engineer and add additional support...
angry_muppet:
After a frustrating afternoon, I finally got the 2mm motor and battery connectors soldered to the ESC. Even with a pair of crocodile clip "helping hands", it's damn fiddly!
Motor is mounted and it's now a matter of trying to figure where the battery will fit to keep the CoG on the spar so I know where to place an access hatch. The model was designed to remove the wing to replace the battery - not my preferred method! It's busy inside the fuselage at the moment, but there's room to place the ESC and battery side by side just ahead of the LE. I estimate the CoG should be approximately correct with that.
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