At 04:42 PM 2/13/2015, you wrote: >Yep, it was a J-3 >+++++++++++++++++++++++++++
If you're speaking of the one Mike posted a week or so back, it was a Tripacer, not a J3 As for single engine, two props, I don't recall another single aircraft since the Wright Flyer, 100+ years ago, other then multi rotor helicopters and other VTOL aircraft, that used that configuration. I can't imagine how you could adapt that system to a KR but then, there are a lot of things I can't imagine. One thing I am sure of, if you build with one engine and one prop, you'll be in the air years sooner and enjoying the wonderful time of flying a KR. Larry Flesner