Seems simple enough to design in solenoid activated pins to prevent the
blades from folding during reverse.Â* ...But the reverse thrust just
might put the blade tips into the ground...

On 8/19/2020 9:31 AM, Eric Greenwell wrote:
Chris Wedgwood wrote on 8/19/2020 7:33 AM:
On Tuesday, August 18, 2020 at 3:01:45 AM UTC+2, Dave Nadler wrote:
On Monday, August 17, 2020 at 8:01:08 PM UTC-4, Cumungus wrote:
When the propeller spins backwards in the demo reel, confidence
that the
engineers will make an airworthy aircraft is instantly flushed down
the toilet.

That feature is for backing into your parking space.

Or for landing downwind on golf courses..

That's an interesting idea, sort of the modern tail parachute like I
had on my H301. It was enormously powerful, but not controllable, just
deployed or not. An electrically powered propeller could be used to
provide adjustable drag from zero to "a lot". The design issue is
keeping the propeller from folding backwards when you want it to
produce drag.


--
Dan, 5J