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Author Topic: McCoy 098 glow  (Read 2873 times)

ChrisSarnowski

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McCoy 098 glow
« on: January 28, 2013, 05:50:25 AM »
Hi Guys,

I picked up a little McCoy 098 glow engine at a club auction. It appears to be the non-ring one. I have read that this engine is not a powerhouse, but I wonder if it is worth fooling around with. I was searching here and there, and saw Howard Rush built an All American Jr with the little McCoy. Looks cool!!!

Does this engine have a fiber or paper head gasket? It looks that way from the outside but I haven't pulled the head.

It also needs a bolt for holding the prop on. I haven't taken it down to the shop yet - anyone know what size size and thread I should use?

Thanks
Chris
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Offline Phil Bare

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Re: McCoy 098 glow
« Reply #1 on: January 28, 2013, 07:32:04 AM »
Hi Chris, The McCoy .098 is a fine little engine and I have used one quite abit over the years. It will fly the .09 to .19 sized planes just fine.  I will have to go to the shop to check the prop bolt size, I am not sure about the head gasket as I haven't had one apart in many, many years.

Regards, Phil Bare.
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ChrisSarnowski

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Re: McCoy 098 glow
« Reply #2 on: January 28, 2013, 08:27:46 AM »
Thanks Phil. I will get some bench runs on it when the weather warmer here in Massachusetts.

What are you using for a prop? I would guess maybe 7x4 or 7x5?

I expect that I should use a healthy dose of castor with this engine, given its iron piston and age.

-Chris
 
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Offline Bill Little

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Re: McCoy 098 glow
« Reply #3 on: January 28, 2013, 09:21:19 AM »
Chris,

The .098 is not a power house for sure, pretty anemic......

10% nitro, 25%-28% mostly castor.  I add castor to Sig Champion.  Possible even a 7-6 prop and let it rev.

BIG Bear
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Offline Phil Bare

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Re: McCoy 098 glow
« Reply #4 on: January 28, 2013, 09:38:36 AM »
Chris, I use 7 X 4 props on the .098 and run 5% nitro and 29% all castor fuel. I am flying a profile ME 109 with a wingspan of 30 inches with one, .012 x 50 ft. lines

Regards, Phil Bare
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Offline RandySmith

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Re: McCoy 098 glow
« Reply #5 on: January 28, 2013, 03:00:30 PM »
Quote from: Phil Bare on January 28, 2013, 07:32:04 AM
Hi Chris, The McCoy .098 is a fine little engine and I have used one quite abit over the years. It will fly the .09 to .19 sized planes just fine.  I will have to go to the shop to check the prop bolt size, I am not sure about the head gasket as I haven't had one apart in many, many years.

Regards, Phil Bare.

Hi Phil
Just so people know, the engine will not fly many ships that call for a 19, only the very small easy to pull ships will fly with this engine.
Unless you just want to fly around in a level lap circle.
Planes like the Ringmaster, P-51  Yak 9 , Buster....etc ....  will not do well with this engine, as will the Lil T-Bird will suffer

Regards
Randy
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Offline Phil Bare

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Re: McCoy 098 glow
« Reply #6 on: January 28, 2013, 04:22:37 PM »
The McCoy .098 will fly most anything that calls for an .09 to .19,  from my experience. Your milage may vary.

Regards, Phil Bare
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ChrisSarnowski

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Re: McCoy 098 glow
« Reply #7 on: January 28, 2013, 06:05:47 PM »
Thanks for the input, guys. I am thinking about putting it on the All American Jr, which has 26" wingspan and 140 sq. inches of wing area.

Looks like the original plans for the All American Jr. called for a McCoy 098, or either a OK Cub 074 or 099.
I will definitely bench run it before I commit, though.

My engine seems to have a scary amount of sub-piston induction. Is 1/16" too much?

Seems like a 6-32 machine screw would work to hold the prop on.

-Chris

ps. (EDIT) Piston liner is in backwards, that is why it looks like it has sub-piston induction. Also yes does have head gasket, paper or such.
« Last Edit: January 28, 2013, 08:18:24 PM by Chris Sarnowski »
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Offline dennis lipsett

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Re: McCoy 098 glow
« Reply #8 on: January 28, 2013, 06:23:24 PM »
I never had the lapped piston 098, rather the ringed version. I had 2 of them and they came about one half wore out from Duromatic. They were anemic and the starting drill pretty soon degraded too a shot of 30 wt oil, a prime and flip it like you meant it. Mine wore out reasonably fast and towards the end of one of the engines life I swear that it would free wheel about 2X after the engine quit. I then moved up to an improved engine the OS Pet 09. Can anyone see a pattern here. It got better when I hit 10 and moved up to larger engines.

Dennis
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ChrisSarnowski

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Re: McCoy 098 glow
« Reply #9 on: January 28, 2013, 08:24:10 PM »
Yeah, point taken Dennis. Still I want to see the thing run though, just for the heck of it.

-Chris

ps. Exploded view, courtesy of da bay.

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Offline John Eyer

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Re: McCoy 098 glow
« Reply #10 on: February 15, 2013, 12:19:39 PM »
My first engine was a McCoy 098 ring around 1952 or so.  It taught me how to hand flip a propeller with authority and provided  many hours of practice too .
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Offline Ward Van Duzer

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Re: McCoy 098 glow
« Reply #11 on: February 24, 2013, 02:15:41 PM »
I put one on my Wee-Duper Ziltch (very light!) and it wiould barely do an old time climb. Replaced it with an OS .10 and it was a blast!

Good luck!


Ward
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