Hybrid hex uses gas/electric combo to get 2.5 hours flight time

If you can ignore the over-the-top music on this video from Top Flight, the MIT spin-off company has some very interesting power technology that can get 100 mile range of one gallon of gas.  More details in this Technology Review article

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Comment by Jiro Hattori on May 2, 2015 at 2:35pm

https://www.flickr.com/photos/democonference/15642319029/in/photost...

Complete coverage of DEMO, New Tech Solving Big Problems, can be found at bit.ly/DEMOsite. Photo by Stephen Brashear (www.stephenbrashear.com)

Comment by Acorn on May 2, 2015 at 5:22pm
Why not a hydrogen fuel cell. They're off the shelf.
Comment by Paul Schreiber on May 3, 2015 at 2:24am

afaik hydrogen fuel cells are not really off the shelf. After a few use lots of parts need to be replaced.

Comment by Patrick Poirier on May 3, 2015 at 1:35pm

It looks like a Wankel type engine like LiquidPiston is developping:

http://liquidpiston.com/technology/x-mini-gasoline/

Connected to a Hallback Array type of motor-generator

http://www.launchpnt.com/portfolio/aerospace/electric-machines-for-...

Comment by Gary McCray on May 3, 2015 at 7:11pm

Very cool, the 95% efficient generator and a light weight engine design like the Wankel are probably just what you need to make this work.

Comment by Todd Urban on May 3, 2015 at 11:02pm

those liquid piston engines are awesome

Comment by Patrick Poirier on May 5, 2015 at 11:25am

Getting back to inboard generator, here's what SULLIVAN (RC Starters and accs.) if offering since 2013.

http://www.sullivanuv.com/images/products/NEW/alternators/S676-500D...

This is one of the compatible engines....Looks familiar ?

Just add a fan cooling assembly and a voltage regulator and you get 2800 Watts under 5 pounds (dry).

Comment by 小夕kevin on May 6, 2015 at 2:19pm
cool!But will the vibra of the gas-motor influence the aircraft?

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