At 06:31 PM 7/14/04, you wrote: > The B17F is the only variant in >the lower HP ranges that is >set up for propeller use. The B-17 C and D are set up for prop use. Here's an interesting application http://www.aircraftersllc.com/classifieds/cirrusn420a.htm The D is basically the same engine as the C, but aerobatic.