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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> RC Fuels >> Rings and castor?
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Rings and castor? - 9/19/2003 2:51:05 PM   
flyingflash


 

Posts: 25
Joined: 9/12/2003
From: gfjdjhjh, UNITED KINGDOM
Status: offline 		i have purchased an old os max-h 60 and a mccoy 19 redhead? (most of paint missing)
i started the hobby running castor straight in all my glow engines this was in an os46fx and mds25. although they did run it was pretty hopeless.

i have been told that for the mccoy (ringed i think) and ringed os max-h 60 i can only use castor straight again instead of my usual 5% synthetic/castor mix or 5%synthetic fuels.
Apparently the rings will wear out in no time on fuels with no less than 20% castor.

dont want this as these are old engine and spares are very hard to find!!

any advice??
       Post #: 1

RE: Rings and castor? - 11/2/2003 10:06:20 PM   
canesugarrules



Posts: 174
Joined: 4/6/2002
From: New Orleans, LA,
Status: offline 		I am instrested also. Any body?

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RE: Rings and castor? - 11/3/2003 3:58:44 AM   
downunder



Posts: 3105
Joined: 10/10/2002
From: Adelaide, AUSTRALIA
Status: offline 		I must admit I use straight castor in everything (ringed, ABC, lapped iron) but I can't see that something like a 50/50 mix of castor and synthetic can hurt. The main thing is having enough oil and to me that means 20% minimum. This would be fine in the OS but have a good look at the McCoy to make sure if it's ringed or a cast iron piston. If it's cast iron then I'd use 25% all castor. I'm not totally sure but I think McCoy made a rear induction .19 similar to their larger engines..if yours is one of these then I'd mount it on a display stand

OK, I just had a look at the instructions for my ringed Super Tigre G51 and although it doesn't say specifically for their ringed engines they recommend a 50/50 mix of castor and Ucon synthetic at 20% total oil.

(in reply to canesugarrules)
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RE: Rings and castor? - 11/6/2003 10:44:51 PM   
canesugarrules



Posts: 174
Joined: 4/6/2002
From: New Orleans, LA,
Status: offline 		I have a ringed Enya 60 from mabey 1985. Do you know what the piston/cylinder is made of? Would this use the same fuel as an OS 46 FX or 40 LA? I am trying to decide what percentage of synthetic/castor. Is 20% oil made of 50/50 synthetic/castor (Sig Championship) OK for ringed and nonringed engines? Thanks

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RE: Rings and castor? - 11/7/2003 1:09:31 AM   
downunder



Posts: 3105
Joined: 10/10/2002
From: Adelaide, AUSTRALIA
Status: offline 		Almost all ringed engines use a hardened steel liner although some of the earlier Super Tigres had their liners chromed as well. The pistons are always aluminium but don't need to be the high silicon type as used by ABC engines because they're not relying on the piston to give the seal. That Sig Championship fuel should be fine in the Enya and the 46FX but personally I'd add a little more castor to it to bring it up to about 22% for the LA because it uses a bushed crankshaft.

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RE: Rings and castor? - 11/7/2003 3:15:50 AM   
Hobbsy



Posts: 10379
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		I made an interesting observation when running in an MVVS .61, I was using 5% nitro fuel with 20% lube that is 18% synthetic and 2% castor. After the first half hour of break in I pulled the backplate to see how things looked. The counterweight or flywheel was bone dry, the bushings on both ends of the rod were oily and the rear bearing had some oil in it. Apparently the synthetic does not stick to metal very well to leave the counterweight dry. I had never seen that before. I think 50/50 lube would be much safer to use.

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RE: Rings and castor? - 11/7/2003 3:19:02 AM   
Sport_Pilot



Posts: 7412
Joined: 1/21/2002
From: Acworth, GA, USA
Status: offline 		Those old ringed Supertigres with the chromed sleeve were brass sleeved and advertised as ABC. I think the ringed Enya's used steel sleeves. I would use a healthy amount of castor oil on an old engine, even ringed. Might be a good idea to use all castor as the synthetic oil will clean up some of the varnish which may be built up behind the rings. Depends on how gunked up it looks like inside. Most McCoys were cast iron piston and need all castor oil.

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RE: Rings and castor? - 11/7/2003 3:28:49 AM   
ZAGNUT



Posts: 2436
Joined: 2/26/2003
From: tel-aviv, ISRAEL
Status: offline
quote:

ORIGINAL: downunder

I'm not totally sure but I think McCoy made a rear induction .19 similar to their larger engines..if yours is one of these then I'd mount it on a display stand




yep, there was a .19 red head disk valve! there was also a front intake version but without ball bearings. both had rings. i'm sure that synth oil would be fine if it has rings but i use ALL castor in all my engines, even the big gassers. sometimes low-tech is the way to go!

dave

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RE: Rings and castor? - 11/7/2003 3:32:59 AM   
ZAGNUT



Posts: 2436
Joined: 2/26/2003
From: tel-aviv, ISRAEL
Status: offline 		downunder, i'll post a pic of the red head .19 for ya when i get back home
like some of the enyas, it has no removable backplate!

dave

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RE: Rings and castor? - 11/7/2003 10:54:24 PM   
canesugarrules



Posts: 174
Joined: 4/6/2002
From: New Orleans, LA,
Status: offline
quote:

ORIGINAL: Sport_Pilot

Those old ringed Supertigres with the chromed sleeve were brass sleeved and advertised as ABC. I think the ringed Enya's used steel sleeves. I would use a healthy amount of castor oil on an old engine, even ringed. Might be a good idea to use all castor as the synthetic oil will clean up some of the varnish which may be built up behind the rings. Depends on how gunked up it looks like inside. Most McCoys were cast iron piston and need all castor oil.



Do you mean old as in worn out, or old as in age? My uncle gave it to me a few weeks ago. He said that the engine has very little run time since he bought it. When he gave it to me, the rearer bearing was rusted so I replaced both of them. I have run it a few times and there is some castor or carbon deposits on the cylinder and piston. Should I take the engine apart again and clean it out? If so, what do I do? Thanks

(in reply to Sport_Pilot)
       Post #: 10

RE: Rings and castor? - 11/8/2003 2:05:12 PM   
downunder



Posts: 3105
Joined: 10/10/2002
From: Adelaide, AUSTRALIA
Status: offline 		Zagnut...would that be the spark ignition one on e bay right now? I've got a feeling it's going to bring some big money

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       Post #: 11

RE: Rings and castor? - 11/13/2003 2:21:14 AM   
ZAGNUT



Posts: 2436
Joined: 2/26/2003
From: tel-aviv, ISRAEL
Status: offline 		well it's more of an "artist's rendition" than a pic, guess they didn't have cameras back in the fifties
i got to fondle one of these awhile back, nice, but the shiny die-cast case is nowhere near as attractive as the sand cast .60.

another good reason for castor in the mccoy is the disk to backplate contact. a lot of these engines had both parts made from alum and insufficient lube can lead to galling and wear.

anyone in need of rings for old engines should look up Frank Bowman here on rcu

dave

edit: forgot all about loading the pic

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< Message edited by ZAGNUT -- 11/13/2003 12:58:23 PM >

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RE: Rings and castor? - 11/13/2003 3:48:03 AM   
Sport_Pilot



Posts: 7412
Joined: 1/21/2002
From: Acworth, GA, USA
Status: offline 		That is old as made a long time, regardless of how worn it is. I wouldn't bother cleaning it unless really caked on.

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       Post #: 13

RE: Rings and castor? - 11/13/2003 2:28:22 PM   
downunder



Posts: 3105
Joined: 10/10/2002
From: Adelaide, AUSTRALIA
Status: offline 		Zagnut...yep, that's the one...I used to have the .29RR and there was a steel shim between the disc and backplate to avoid alloy to alloy contact.

(in reply to Sport_Pilot)
       Post #: 14

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