Testors McCoy .29 Engine

[John Beiser]

I have a Testors McCoy .29 engine which I acquired from a relative. It is new in the box, and has never been run. I was thinking about using it on a Brodak Super Clown to get back started in control line. I am not familiar with this engine, all of my experience has been with the old McCoy red head engines or Fox 35s. What do you think?

[Just One-eye]

If you have the odd "square" one, it's a better runner than its truly strange looks seem to indicate.  The metallurgy is still anchored in Red Head territory, however, with its steel cylinder, so you'll need a high oil content fuel, same as for a red Head.  I would consider it on the heavy side of the range for a Super Clown, however.  My favorite engine in those was one or another .19, like the GH Torp, or the Veco 19 BB, or the old Max III 19 from OS. 

[Garf]

If it is a pre redhead model, it's a good engine, but low on power.

[Joe Messinger]

If your engine is a Testors McCoy Series "21" it was probably made in the 1960's - 1970's period.  These engines feature a "Dykes" piston ring.  I have one each of the Series 21 engines.   .19, .29, .35 & .40. I've used all of them on airplanes and they perform reasonably well.  They are on the heavy side and run best (for me) on all castor fuel.  25% seems about right.  They aren't set up for a muffler and strap on mufflers can cause over heating.

That being said, an OS .25 might be a better choice for your Super Clown.  That engine is quite a bit lighter than the Series 21 and offers better, more user friendly performance, in my opinion.

Joe

[Will Hinton]

What Joe said.  (Ya can't beat the LA25 in that size ship, IMHO.)
Will

[billbyles]

I have a Testors McCoy .29 engine which I acquired from a relative. It is new in the box, and has never been run. I was thinking about using it on a Brodak Super Clown to get back started in control line. I am not familiar with this engine, all of my experience has been with the old McCoy red head engines or Fox 35s. What do you think?

Email John Wright, he has a lot of experience with the Testors McCoy series engines and really likes them.  They are a good running engine, although they are just a bit heavy (John has the fix for that.)