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Engine identification please

Posted: Sun Mar 18, 2018 5:23 pm
by SteveM
I have this engine that a friend of my dad's gave to him about 30-40 years ago.

There is no name that I can find on it and it's missing the carb, which probably would have had some markings.

It is big and it has a transmission on it that has a variable pitch system. A lever on the side opposite the prop end rotates the propeller mounting shafts.

The prop mounts to about 22" tip-to-tip.

Anyone recognize this?

What size plane would something this big have been used on?

Steve

Re: Engine identification please

Posted: Sun Mar 18, 2018 5:24 pm
by SteveM
More pictures

Re: Engine identification please

Posted: Tue Mar 20, 2018 12:30 pm
by SteveM
70 views and no answers?

Must be pretty unique :-)

Does anyone have any suggestions for websites / groups where I might make a post asking for help?

Steve

Re: Engine identification please

Posted: Tue Mar 20, 2018 12:35 pm
by warmstrong1955
Sorry....I'm a miner. We don't use too many airplane engines in underground mines.....

;)
Bill

Re: Engine identification please

Posted: Tue Mar 20, 2018 8:28 pm
by SteveM
warmstrong1955 wrote:
Tue Mar 20, 2018 12:35 pm
Sorry....I'm a miner. We don't use too many airplane engines in underground mines.....
We can adapt it to make a variable pitch rotary tunnel boring machine.

Steve

Re: Engine identification please

Posted: Tue Mar 20, 2018 8:30 pm
by warmstrong1955
SteveM wrote:
Tue Mar 20, 2018 8:28 pm
warmstrong1955 wrote:
Tue Mar 20, 2018 12:35 pm
Sorry....I'm a miner. We don't use too many airplane engines in underground mines.....
We can adapt it to make a variable pitch rotary tunnel boring machine.

Steve
Sorry again. Real men drill & blast.
We leave the tunnel boring machines to the sissies.

:)

Re: Engine identification please

Posted: Tue Mar 20, 2018 11:05 pm
by Bob D.
Can't help on an ID. Sure looks like it could power an ultralight aircraft. Not that there isn't some RC stuff big enough to run that huge of a prop prop but I think you have an early 70’s homebuilt manned ultralight aircraft power plant.
Sachs? Hirth? If you measure the displacement it might help in searching.
Really cool setup!!

Bob D.

Re: Engine identification please

Posted: Wed Mar 21, 2018 1:21 am
by NP317
Contact the Academy of Model Aeronautics.
http://www.modelaircraft.org/museum/museuminfo.aspx

They maintain a remarkable museum which include many engines, some designed for early military "drone" power.
Your engine looks related to those.
~RN

Re: Engine identification please

Posted: Wed Mar 21, 2018 8:03 am
by SteveM
Bob D. wrote:
Tue Mar 20, 2018 11:05 pm
Can't help on an ID. Sure looks like it could power an ultralight aircraft. Not that there isn't some RC stuff big enough to run that huge of a prop prop but I think you have an early 70’s homebuilt manned ultralight aircraft power plant.
I looked up some data on prop size vs wingspan and it indicated that a prop this big would be for an airplane with an 80" wingspan, so my guess is one of those REALLY big airplanes, but maybe it could push an ultralight, like one of those powered hang gliders.

Steve

Re: Engine identification please

Posted: Wed Mar 21, 2018 8:21 am
by SteveM
NP317 wrote:
Wed Mar 21, 2018 1:21 am
Contact the Academy of Model Aeronautics.
http://www.modelaircraft.org/museum/museuminfo.aspx
Thanks!

I sent them a note. We'll see if they come back with anything.

Steve