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Electric powered Gyro any thoughts?

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stanislavz

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I have made an long discussion with Jukka Tervamaki: https://www.tervis.fidisk.fi/JTsite/elgyro.html , on replacing 447 rotax with battery and electric motor (+- close weight and power with 5 gal of fuel) - if memory servesm two tesla battery packs and 15 kw el motor.

And some data was updated - but in short it was more than not yet. 447 powered autogyro are on the edge of too low power, and battery powered - will take al battery juice in 20 minutes plus some reserve..
 

byronhead

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Dec 23, 2011
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PRA.org had a cover with a jump gyro on it and it is already complete and flying. It had a tri blade rotor that in pre rotation was flat without pitch until the pilot wanted to add it. It would jump up 700 ft, switch from pre rotor to prop and start flying. used a subaru 3.5
 

vhhjr

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The best airframes for electric power are those with very high aerodynamic efficiencies. I doubt gyros fall into this category. The jump gyro described above is powered by a 3.5 Subaru. To convert to electric power would require supplying an equal amount of power, something North of 150 HP (112 kw). To run this at cruise (75%) would require at least 80 kw/hr. At 120 watt hrs/lb, that's over 650 lbs of batteries for one hour of flying not to mention the initial cost of a battery pack of this size. Battery powered helicopters have flown, but not for very long.

All that said, they are called experimental aircraft and an electric powered gyro would certainly be an experiment.
 
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dino

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Gyros are one of the most inefficient flying machines. Hybrid distributed power might combine reduction gear, prerotation, starter and alternator into one system while providing some redundancy but probably at a significant weight penalty.
 
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