skeptic36 Posted July 28, 2013 Share Posted July 28, 2013 http://www.ebay.com.au/itm/Avro-Avian-1927-/300940116054?pt=AU_Aircraft&hash=item46116dc056&_uhb=1 1 Link to comment Share on other sites More sharing options...
Marty_d Posted July 29, 2013 Share Posted July 29, 2013 Saw that - beautiful looking old plane. Perfect for someone with a big shed, lots of time and buckets of money! At the risk of being stoned by the purists you could bolt on a 912UL with the cylinder heads hanging out in the breeze... Link to comment Share on other sites More sharing options...
fly_tornado Posted July 29, 2013 Share Posted July 29, 2013 they got $10k for it. Link to comment Share on other sites More sharing options...
facthunter Posted July 29, 2013 Share Posted July 29, 2013 the original motor was probably only 90 HP but they are Clydesdales. Different type of power.. You can't pull a draggy plane with a tiny prop. Nev 1 Link to comment Share on other sites More sharing options...
Marty_d Posted July 29, 2013 Share Posted July 29, 2013 Wouldn't it be all in the gearing? At the risk of revealing my ignorance, can you bolt on different ratio drives to the Rotax 912? Original was 84 HP, depending on version of course. they got $10k for it. Not surprised - seemed cheap to me. It'll probably need heaps of money to restore to flying condition though. Link to comment Share on other sites More sharing options...
fly_tornado Posted July 29, 2013 Share Posted July 29, 2013 being nearly 90 years old, going to be expensive. Link to comment Share on other sites More sharing options...
facthunter Posted July 29, 2013 Share Posted July 29, 2013 Torque and prop dia and area. Move more air . Many of the Rotary engined scouts were only 110 HP with engines revving at 1100 RPM and big props, they gain altitude fast. Same principle as a tractor. You don't put a small high revving engine in them either. Gearboxes absorb power too. Nev 1 Link to comment Share on other sites More sharing options...
Marty_d Posted July 29, 2013 Share Posted July 29, 2013 Thanks FH - that makes a lot of sense. Link to comment Share on other sites More sharing options...
facthunter Posted July 31, 2013 Share Posted July 31, 2013 Same with props on outboards with displacement hulls. Gear then down and make them bigger so a larger column of water is shifted. Give a small velocity increase to a large column of water is better than a large velocity increase to a small column. Nev Link to comment Share on other sites More sharing options...
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