At 03:26 PM 1/6/2012, you wrote: >What are your opinions on using an O-290-D Lycoming for the KR2-S? ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
If your KR is of reasonable weight, 100 hp is plenty of hp to fly well. The 0-235 and 0-290 are similar in weight to the 0-200 but several components, like cylinders, are 50 percent higher in price then the 0-200, a high price to pay for a few extra ponies. If you intend to go with a certified aircraft engine, the 0-200 is hard to beat. Building to 650 pounds empty weight and not 725 to 750 pounds empty weight will more than make up for the 25 less horsepower. Before laying your money down on a small Lycombing, check part prices in Trade-A-Plane, Aircraft Spruce, etc. Larry Flesner
