Military Surplus 4 cyl engine Model 4AO32-4 Manufactured by Teledyne
David Waynescott
runs a story on this military surplus engine. It also says that the engine
is a 20 HP engine but all of the research I could find on it shows it as a 6
HP engine. Can anyone shed some light on this?
Wee Moose
>runs a story on this military surplus engine. It also says that the engine
>is a 20 HP engine but all of the research I could find on it shows it as a 6
>HP en
16 HP would probably be about maximum. So far I have no evidence that this
engine has flown anything out of ground effect.
Engine only has splash lubrication to rods and the aluminium rods are their own
bearings.
Carl
Unknown
wrote:
The engines are rated in a strange way to what everyone is used to.
The ratingr is the power at elevated temps and altitudes. The 32 gets
rated at 107° and 7,000. The 6 hp is also not the max rating either.
The best you could reliably get out of it is going to be 18-20hp.
It has a full pressure oil system. Pump filter and all. There is a
group on yahoo that deals with just these engines for aviation use.
surplusengines I think is the name of the group.
G
Wee Moose
>The best you could reliably get out of it is going to be 18-20hp.
>
>It has a full pressure oil system. Pump filter and all. There is a
>group on yahoo that deals with just these engines for aviation use.
>surplusengines I think is the name of the group.
Not a single owner of one of the 32s has found an oil passage in the crankshaft
to the rods. Other parts of the engine also depend on oil sling for
lubrication, such as the valve train.
I would like to see someone get 18-20 hp out of one, but it will require a
redrive and the engine is already overweight, (70lbs I think). I also don't
think its going to be reliable either.
surplusengines is the name of the Yahoo Group -- go there and check the
archives.
The 42 and the 84 are much better prospects -- in particular the 84. I am not
sure they are really that much better than a VW conversion.
The 32 is cute, but I wouldn't put one in an RC much less something I would
trust my life to.
Carl
Unknown
>to the rods. Other parts of the engine also depend on oil sling for
>lubrication, such as the valve train.
Talk to Bruce Holtz he seems to have found a bit of oil. If its splash
lube why do the manuals show pressure and why is there even a oil
pump? (Bruce has about 13 of the 32's running right now btw)
The dash-1's didn't have the pumps but the -2, -3 and -111's do.
>The 32 is cute, but I wouldn't put one in an RC much less something I would
>trust my life to.
>
>Carl
Bruce was mubleing something about 4 of them in a small scale b-17
(no idea if he's really serious) Lots of people working on using the
32's. I'd agree with you on the fact its going to be a bit tought to
make it work. I think people are expecting too much from them hp wise.
Doesn't help when the few articles you find talk about 35-40 hp with
just a few mods either.
G
Wee Moose
>>lubrication, such as the valve train.
>
>Talk to Bruce Holtz he seems to have found a bit of oil. If its splash
>lube why do the manuals show pressure and why is there even a oil
>pump? (Bruce has about 13 of the 32's running right now btw)
>
>The dash-1's didn't have the pumps but the -2, -3 and -111's do.
>
I am a member of the group, but I do not remember any post saying there was
pressure to the rod ends. Actually, that is not that big of a problem on small
engines. However, having the rods be their own bearings is not a good idea. I
know of no small engines that use this practice other than a few cheap model
engines. All of the model engines I have have bearings on both ends of the
rods.
Oil pump provides pressure to mains and other parts of the engine that are not
able to be lubricated by the oil slung off the mains.
<Doesn't help when the few articles you find talk about 35-40 hp with
just a few mods either.
>
Early Honda CB/CL 450s can easily make that kind of HP. Of course, the redline
was 10,500 RPM. Dual cams, mousetrap valve springs, roller bearings everywhere,
dual carbs.
Carl
DC3Gooney
Mirage, about 2 years ago. Just thought I'd lurk through
some threads, and caught this one.
Just found a site that may give you guys some help,
it interested me ~ hope you don't all say "duh, it's
our most helpful group member"....
http://home.cfl.rr.com/aircraft/
Discusses these motors.
I wouldn't want to be his neighbor.
DC3
