… And then 3 come along at once!

Gentlemen, start your engines!

It’s a race between Germany and Hong Kong!
The flight electronics for the Bormatec have now been ordered from HK-based stockists, Hobbyking.

http://www.hobbyking.com/hobbyking/store/index.rc

2x 4000 mAh, 14.8 volt, 4S1P (4 series, 1 parallel) Lithium-Polymer cells, for main power.
An NTM Prop Drive Series 42-38 brushless motor, rated at 750kv*
Along with a 70 Amp ESC and the servos required to operate the aircraft.
Oh, and a LiPo charger. ‘Cos I was lacking one.

The combination of these, using one battery at a time (for better at-the-field testing times), should allow flight times of approximately half an hour. For propeller choice, I have gone for a scale-ish 3-bladed unit from Master Airscrew; 12 x 6 inch.

Running cost at this point, is now c. £350, including the original Arduino electronics and sensor modules. Significantly less, it’s worth noting, than any comparable equipment you could buy… Let’s say a comfortable factor of 10. At the minimum.

And now the waiting begins…

* KV in the sense of brushless RC motors, means RPM per Volt. (so max RPM 11,100)