I agree, engine power is a seducing answer... but not a good one. I used to operate my KR2 in Johannesburg, South Africa. The field was 5,300' altitude, temperature could add another 2000'+. My aircraft had a 65hp VW engine.
The aircraft would fly at gross weight, but then the main issue was the take-off roll, which could exceed 1000m, then the the climb rate, which could fall to 150fpm. So, a lower wing loading would have helped more than a more powerful engine. If I had to build a KR2 with altitude operations in mind, I would first of all go for the new airfoil, increase the wing span, enlarge the rudder, and get more power, but honestly, 80hp is all you need. That's what my new engine pulls, and it gave me more than enough power at that altitude. Can't wait for the first flight near sea level. Serge Vidal Paris, France
