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On Fri, 25 Nov 2005 23:16:20 -0500, "Morgans" wrote:
"Ron Wanttaja" wrote In either case, he swapped it for a VW with the Valley Engineering PSRU and is now turning a 96 inch diameter prop with 60 inches of pitch. He claims it provides 70% more thrust than the old engine. Hmmm, lengthen the gear legs on the Fly Baby.... :-) Wow! It is hard for me to get my brain wrapped around the fact that a VW could be stronger than an A-75, even with a redrive! OX-5 engine: 90 HP O-200 engine: 100 HP Pull the OX-5 out of a Jenny, install an O-200, and try flying. Back in the '60s, Boeing decided to build a replica of their first aircraft, the B&W (Boeing and Westervelt) for the 50th anniversary of the company. The original was a great big biplane and had a 125hp Hall-Scott A-5 engine with a long, wide-chord prop. http://www.centennialofflight.gov/es...y/Aero17G2.htm The replica was ALSO a great big biplane. They used a geared GO-435 engine with twice the horsepower and a leetle-bitty propeller. http://1000aircraftphotos.com/Biplanes/BoeingB-W.htm I've heard that the replica, even with twice the horsepower, can barely get out of its own way. Big draggy airplanes want big, slow-turning props, and apparently half the HP is OK if it's being pushed into a big prop. Ron Wanttaja |
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