Richard:

Go into the 1/8 A and 1/2A forum, look up user name “Tim Wiltse.” He ahs a home shop and does plain and fancy anodizing. Best part, he’s right there in North Carolina with you.

\AJCoholic also does anodizing, but he’s in Canada/

Bill.

Some comments and opinions:

McCoy Redheads (front intake) were an excellent design. The first ones ran well. I understand that due to the "engine wars" at the time, McCoys were eventually assembled by not necessarily skilled people and fits suffered. Sometimes you got a good one, sometimes a bad one. George Aldrich also said that what killed many of them was the inferior lube in Testors 39 fuel...get the connection, cheap engines, cheap fuel = worn out quickly. Most of the cheap ones were bought by inexperienced people who did not know how to break them in. I currently have a couple of the good .35's. I'll have to fess-up to using Testors 39 back in the day also.

BTW, during those price wars, K&B came out with the "Stallion" series and Fox came out with the "Rocket" series. These engines used no bronze crankcase bearings, and some other "cost cutting" shortcuts. (Fox STILL made the stunt .35 during this time.)

I believe the McCoy blue heads were RC and the lightning bolts were constructed better. I think the lightning bolts have a better crankcase bearing.

The Series 21 was never really accepted well because of the weight induced by the massive square crankcase. I have a couple of .19 CL's.

George

Actually as I recall,the case of the 21 was not that heavy. I have one and the weight is from the steel finned sleeve. It may have been slightly heavier than most stell finned sleeved models, but not much. Actually steel finned models are rare for sizes above .20 or so, so its hard to compare. The case is aluminum and not as much heavier than you might think. I thought it was the dykes ring, that made novices think it was worn out right out of the box, that did it in.

I flew a McCoy 35 redhead in Old Time Stunt (on a Sterling Yak-9) for a couple of years and was quite pleased with it. I've flown the redhead 19's for several years and think they are perhaps a better engine than the 35. I got rid of all my McCoy 35's because Fox 35's do as well or better and one can get parts. I still have the 19's. I've flown the Series 21 40's some and was not well impressed with them, although they have their advocates.

So far as the age of the Fox stunt 35. I think it has evolved a little, but is basically the same engine as back when it had two backplate bolts and 4 head bolts. So I would call it the longest in continuous production US engine.

The current Fox .35 Stunt is legal for SAM Foxacoy and is substantially the same as the original 3-screw backplate versions. The most noticable difference is the provision for muffler mounting, and a "50th Anniversary" logo on the bypass. I've seen several different needle valve assemblies and thrust washers and maybe a different head or two, but don't believe the internals have changed. I haven't heard that any particular version has a performance advantage, either.

I haven't worn one out yet, but they seem to take forever to wear IN

Actually most e ngines from that time frame had steel fined cylinders. The Johnson, K&B, Anderson, OK, etc all had stell cylinders

There was a standard joke about Testors/McCoy engines in the 60's. If you ever got one started, you just wore it out. They had very soft piston and cylinders and wore out quickly. That's why they only cost $5.95 for a 35 when a Johnson ran about $18 to $25 and a Super Tigre was $17. Even a Fox 36X was $14.95. A K&B Torpedo was $18. The K&B Torpedo 45 R/C was $27.95.

Actually, not. The Series 21 was made in the early 70's, those were made in the 50's. But I get your gist. Still most of those engines had thin walled sleeves and fins, the 21 McCoy had thick fins, not sure about the sleeve itself.

I didn't say anything about the Type 21. They came out in 1971 and were the worst of the bunch. The straw that broke the camel's back as they say. They came out in 1971 and disappeared shortly thereafter. They were the engine that put McCoy out of business for good. One of the engine guys, George Aldrich, even called them Junk in a column. They had the same one piece cylinder which was zinc plated. The aluminum piston has a single Dykes ring. They wore even faster then the old red and blue heads. I have a box of them in the basement. Again, none of them had sleeves. They all had one piece steel cylinders with integral fines. All made from one piece. Just like Johnson, K&B, OK and several other engines of the day.

The old redhead/Testors came out in 1957. They were around in some form or another until 1970 as headheads, blue heads and with and without lightning bolts. The parts were all interchangable and all were worth exactly what you paid for them. $4.95 for the 19 and $5.95 for the 29/35. The prices did go up during their run but compared to the other engines of the day they were DIRT cheap. If you didn't know better or couldn't afford better, you bought a McCoy. This excludes the old Duromatic 60 which was THE class "C" speed engine until the late 60's when it was overtaken by Dooling and some of the later screamers.

The first Testors had the plug centered and had no bosses on the venturi. After that, in 58, the plug was offset and the venturi had bosses where the spray bar went through. Other than the lightening bolt, color changes, and R/C carbs on the blue ones, they were the same engines.

Hobbsy,

I noticed in the picture of your engine stuff that there is a K & B needle valve assembly. I would like to buy it if it is for sale. Do you have, or know where I might find some vintage parts such as gaskets, needle valve assemblies, etc. for McCoy & Veco/K & B?

Thanks,

Richard

PS: I also am looking for a prop drive washer for a Veco .29 u/c.

http://www.mecoa.com/kb/48/48-parts.htm Part # 9255 towards bottom of page. On the 61 page it is listed as 99-9255.

w8ye,

Thanks for the reply. If the needle valve assembly is for a .61, don't you think it might be a bit much for an old .29 u/c?

Thanks,

Richard

OS now uses the same remote needle assembly for the LA40 up through the 91FX

K&B also uses the same remote needle valve assembly on all their engines from the smallest to the largest.

The K&B NVA is also higher quality than the Oriental Scrap part. The K&B not only has an o-ring to seal the needle itself, the seal is adjustable for wear. Never need the fuel tubing on the outside that seems to be an automatic addition to the OS needles.

Bill.

And we continue to bad mouth OS engines.

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We will stop when OS quality is back to where it was 40 years ago.

Bill.

It is. We??? Do you have a mouse in your pocket??