Arvo Avian on ebay

[skeptic36]

http://www.ebay.com.au/itm/Avro-Avian-1927-/300940116054?pt=AU_Aircraft&hash=item46116dc056&_uhb=1

[Marty_d]

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...

 

 

[fly_tornado]

they got $10k for it.

 

 

[facthunter]

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

 

 

[Marty_d]

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.

 

 

[fly_tornado]

being nearly 90 years old, going to be expensive.

 

 

[facthunter]

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

 

 

[Marty_d]

Thanks FH - that makes a lot of sense.

 

 

[facthunter]

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