|July 27, 2005
Here's the Mosquito - wing span 4" (actually 3.7"), weight 1.35 grams. It's basically my Mono4 on a diet.
One weight saver was the 4 mm, 28 ohm motor that I got down to 290 mg by replacing the motor can with a 1/64" ply and 0.010" carbon rod frame, and replacing the shaft with carbon rod. I did add back a small flux ring machined from the can - makes a huge difference to the output power. No gear box either - direct drive to a 1" x 3/4" carbon prop weighing about 20 mg, my best prop yet. Other weight savers included using a lightened PIC chip with my YAPP code on the Leichty Micro and soldering directly to the receiver. I also used 2 g/m^2 mylar - about 7 times lighter than Reynold Wrap.
The only significant design change from the Mono4 is in the vertical stab - it is swept back. The theory is that this gives a small up elevator effect from the rudder when it is deflected either way, as in a turn. Not having an identical plane to compare with, it is hard to tell whether this really works, but it does turn well. It uses a left-handed prop to keep the motor direction normal, so it tends to turn right. I need to add some left thrust.
I called it Mosquito because it sounds exactly like one in flight - that little DD prop really screams, but quietly. It flies on about half throttle.