Dale Williams wrote:

                    I'm finally getting ready to assemble rx-7 to go into my w8 tailwind. Would
                    like to use my existing motor mount and gear legs with modifications to use
                    rx-7. This would mean a 60" diameter prop. I've been flying this prop/90 hp
                    cont. combo for 40 years. I really hesitate to increase gear length because
                    of the excellent results I have had in the past.

                    Please sign me up for acre .

                    Thank You,

                    Dale Williams

               Wow a 60 inch prop should turn 8000 engine RPM for take off using a 2.85:1
               gear box. With a p-port that would be close to 275 HP. Quite spectacular.
               Paul Lamar

          And if you don't enlarge the ailerons and rudder, your first takeoff could
          be really spectacular :)
          Bulent

Not necessarily true. 0-320 W-8 are not uncommon. There is one 0-360 with a constant speed said to fly rather nicely. In spite of the size of the control surfaces, the Tailwind is extremely responsive. Thank you Mr Steve Wittman. Of course, Tailwinds are not cookie cutter aircraft and each one is unique. And the more recent model the W-10 does have somewhat larger tail feathers. This is a easy modification if the aircraft is being restored. Dale, unless you have something unusual, you should be able to swing a 68 inch prop. Feel free to contact me off line. I am quite familiar with this installation.
Jerry
jerryhey@earthlink.net

 
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