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Post  Oldenginerod Thu Mar 19, 2015 4:09 pm

Anyone ever seen one of these? Aero 35
I haven't been able to figure out how the piston might link to the crank.  It looks weird hey? Crazy Eyes

Rod.
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Post  pkrankow Thu Mar 19, 2015 4:39 pm

Not in person. Interesting engineering on them though, that is fer sure! Shame they were considered an under performer.

http://www.modelenginenews.org/cardfile/aero35.html
http://stunthanger.com/smf/index.php/topic,36008.0.html

have fun reading.
Phil
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Post  Oldenginerod Thu Mar 19, 2015 6:37 pm

Looks like a lot of unnecessary complexity. Why would you bother for only a 20% height advantage?
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Post  pkrankow Thu Mar 19, 2015 6:59 pm

Oldenginerod wrote:Looks like a lot of unnecessary complexity.  Why would you bother for only a 20% height advantage?

Scale look? There was a geared inline Russian engine linked in one of those articles built for the express purpose of the look.

You are right that is a lot of complexity for a reduced profile. Now just go electric with a good sound system for the scale look and sound!

Phil
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Post  TDbandit Thu Mar 19, 2015 8:03 pm

It's unusual indeed. if they weren't so rare, I wouldn't mind tinkering with one. (Bandit)

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Post  Oldenginerod Thu Mar 19, 2015 9:09 pm

Then there's these RCV engines still in production.
Aero 35 Inline 60sp10
Aero 35 Inline Rcv-sp10
4 stroke, geared rotating cylinder driving the prop at 2:1 ratio, crankshaft only used for a starter, "sleeve valve" arrangement for intake & exhaust.

Rod.
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Post  1/2A Nut Thu Mar 19, 2015 9:54 pm

I would think there may be additional wear induced having a spinning piston sleeve. Also this is just plain dirty having the piston work to spin the mass of the crank and sleeve is scrubbing off power regardless if the gear ratio adds torque you then give up rpm. Its a neat engine to have fun with but not perfection in power into power out. If your goal is low profile mission successful. St.Pats Beers
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