Anybody know what cylinder this is?

edw Sat Feb 16, 2019 7:35 pm

I recently purchased an .020 for next to nothing. It was seized, filthy, and looked like the cylinder was rusted. When I got it apart on my bench I realized that the cylinder wasn't rusted, that was the color of the barrel. I'm not a collector or expert on these engines (yet), but had never heard of a brown cylinder. Can anyone shed light?

PS-engine has good compression, plan to run it this week.

Thanks, Ed

ticomareado Sat Feb 16, 2019 7:49 pm

Probably a cylinder that was de-blackfaced sometime and somewhere.

edw Sat Feb 16, 2019 11:41 pm

Anybody know what cylinder this is? Img_0410

test to see if I did it right.

edw Sat Feb 16, 2019 11:43 pm

How 'bout that? I fingered it out! The brown is too uniform to have beendone in somebody's shop. Looks like it came from factory this way.

Jason_WI Sat Feb 16, 2019 11:44 pm

Probably a R/C throttle ring was on it at some point.

**Cribbs74** Sun Feb 17, 2019 12:40 am

Dried burnt castor. Throttled Pee Wee cylinder.

balogh Sun Feb 17, 2019 1:32 am

Cribbs74 wrote:Dried burnt castor. Throttled Pee Wee cylinder.

Yes it may be so..the ground neck is brownish because of slight rusting but the fins are black. I also have a No2 new oldstock thin wall cylinder that is rather brown than black and not because of rust. See the one at the bottom:

Anybody know what cylinder this is? 15503810

edw Sun Feb 17, 2019 10:41 am

No,this is neither rust or dried castor. The brown finish looks like an anodizing. There are no inconsistent edges that would suggest someones' homebrew, and the coloring is even.

edw Sun Feb 17, 2019 10:42 am

And no wear marks that would suggest throttle ring.

ticomareado Sun Feb 17, 2019 11:12 am

The throttle ring could have been summarily removed by some prior owner without ever having been used (or used very little), thus no scratch marks.

ffkiwi Tue Feb 19, 2019 8:01 pm

edw wrote:No,this is neither rust or dried castor. The brown finish looks like an anodizing. There are no inconsistent edges that would suggest someones' homebrew, and the coloring is even.

Well you can't anodise steel for a start-so forget about that as an option. I'd still opt for it having had a rotating exhaust throttle on it at some stage-possibly only at the factory-that was later removed for some reason-the brown could be either castor residue from actual running or simply oxidised oil/grease from initial assembly-if left undisturbed long enough the stuff dries out like this....or it could simply be a case of the cylinder being inadequately blacked during the treatment process-either thru operator error, or because of time, bath depletion etc etc

ChrisM
'ffkiwi'

Mark Boesen Tue Feb 19, 2019 10:42 pm

ffkiwi wrote:
edw wrote:No,this is neither rust or dried castor. The brown finish looks like an anodizing. There are no inconsistent edges that would suggest someones' homebrew, and the coloring is even.

Well you can't anodise steel for a start-so forget about that as an option. I'd still opt for it having had a rotating exhaust throttle on it at some stage-possibly only at the factory-that was later removed for some reason-the brown could be either castor residue from actual running or simply oxidised oil/grease from initial assembly-if left undisturbed long enough the stuff dries out like this....or it could simply be a case of the cylinder being inadequately blacked during the treatment process-either thru operator error, or because of time, bath depletion etc etc

ChrisM
'ffkiwi'

what Chris said...

getback Wed Feb 20, 2019 10:18 am

Well if it bothers you U can reblue it with little effort and small amount of $$ Babe Bee .049

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Anybody know what cylinder this is?

Anybody know what cylinder this is?

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