Pedal powered rotorcraft....technically :)

cbonnerup

More Senior Every Day
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Greenville, NC / USA
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Building a Gyro, modified J4B2
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Max 1HP continuous input ~ 800 watts, but only for a well-trained pilot and short time.
PHEW is correct. That's why God made IC engines.
 

Thomas

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Big Idea

Big Idea

Seems like they could find something better to do with their spare time. That is like building a ship in the basement and not able to get it out. Attach a prop to a bicycle frame under a blimp is a better idea.
 

WHY

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miami,oklahoma
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Did Santos Dumont do something like that before he put a engine driven propellor on the airframe under a ballon ??

Tony
 

Arnie Madsen

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Mar 14, 2007
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Southport Aerospace - Manitoba Canada
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Bell 47 G2
I see four rotorblades in ground effect that lift the pedal-powered machine off the gymnasium floor ..... nothing wrong with that .... i love what they have accomplished .... but my question is .... if the rotors were mounted above the booms would it lift off ????

I think not .... just a guess .... anyone have an opinion ? thanks. Ground effect is one thing .... powered rotors out of ground effect is something else .... esp. pedal powered.

I still really like the machine in the video ... and the organization of the ground crew who assisted ... I admire youth who attempt such things.
 

buckwill

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Feb 19, 2011
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trona california,
same reason they built dragonfly, never meant to be practical,, but one more hurdle to challenge,, one more "never done before human powered before"
 

Rotor Rooter

Dave Jackson
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Feb 23, 2004
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Yes
Arnie,

Yes it is challenging endeavor. They are attempting to win Sikorsky's award of $250,000.00 for staying aloft for 1 minute and achieving an elevation of 3 meters at some point in the flight.


It shows the significant advantage for vertical flight to have a slow speed rotor combined with low disk loading. Of course, forward flight is another story.

De Bothezat claimed 25 lb per sq-ft for his GB-5, and this craft had a coaxial configuration. Moving the two rotors apart will increase the lift per sq-ft significantly more.

A slow speed rotor combined with low disk loading is particularly important for electric VTOL flight.



Dave
 
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