How low(cost) can you go and still fly? That question forms one of the pursuits of the Minimalist Airplane Study Group, hosted by William Rich on Yahoo Groups. He may have found an answer that leads to several intriguing alternative uses for the type of electric powerplant described below. Use of model aircraft components leads to a low-cost build, and judicious use of off-the-shelf parts from other hobbies keeps costs low and speeds up the development process. He points to a hack from Laserhacker.com, which uses a motor, controller, propeller batteries and connectors one might find at the local hobby shop. This assemblage manages to fly a paramotor despite the small size of the motor and the relatively small size of the propeller. The Laserhacker link shows not only several videos (this has to be the most fun per dollar flying machine), but includes the parts list and pricing for everything but the final battery pack. Components include 3D-printed items …
Thrust Testing Wingtip Puffers
Oliver Garrow, President of Garrow Aircraft, LLC in Mountain View, California, has been developing the Verticopter® concept for the last several years, and made a dinner presentation on his design at last year’s Electric Aircraft Symposium. Garrow’s Verticopter uses pivoting motors to provide vertical and horizontal thrust, with tip and tail thrusters fine tuning low-speed maneuvering capabilities. Verticopters will come in all sizes, with a single-seater ultralight as an entry-level machine and an inexpensive way to test the concept, especially when one uses a low-cost model aircraft motor unit from Turnigy (distributed by HobbyKing in Hong-Kong, P/N CA120-70), and a SPIN 300 Optically-isolated electronic speed controller (ESC) from Jeti for power – at least for the wing-tip thrusters. The motor shown costs a mere $299 for its promised 20 horsepower, while similar German and American units run over $1,000, with similarly high prices for controllers. Testing shown in the video was carried out with lithium-polymer battery packs arranged in a 16S2P configuration …