running old engine...

Hello all - when my father passed away he left me a number of engines, on some of which, I've already recived good advice.

I've also discovered a used McCoy .19 red head and an O&R engine which looks to be a .19 also (no numbers anywhere). Knowing my father, I'm certain they were well cared for when they were being used. However they've just been stored in a box for many, many years. They are u/c engines and I can barely recall my dad having u/c planes about, let alone flying them. So they've been sitting around for a good thirty years.

Both engines LOOK to be in excellent condition and they seem to have good compression. Any procedures to follow before I fire them up and see just how well they run?

Also, I've purchaesd a Ringmaster Jnr. for my son. He's too young for it so, I guess I'll have to fly it for awhile . What sized modern motor would be a good fit? The kit recommends a .19, but there don't seem to many around.

TIA

Yes!

One very important thing is to use fuel that has at least 25-29% lubricants, and most if not all of it to be good old castor oil. These engines needed the castor for the cast iron piston to steel cylinder lubrication. Do not use plain old R/C fuel in these engines - they will wear out very prematurely if you do!! Use someting like GMA's Powermaster all castor 29% oil fuel in these engines.

I presume you are talking about the front intake McCoy 19 Redhead. I have several and like them very much. I run 9 x 5 APC props and Sig Champion 50/50 10% nitro fuel. I've put over 300 flights on one I bought used and it is still in fine shape. Many would prefer an all castor fuel. The Sig Champion 50/50 is a low as I would go on oil. The trick with those Mccoy's is to never, ever, put a too lean run on them.

A friend has a Jr Ringmaster that flys fine on an OS Max 10. Your McCoy 19 would be too much engine for it, in my opinion. I would say a Jr. Flitestreak is to small for a McCoy 19, but then I put an Enya 29 on the first one I built. When was that, you ask? Before I knew better.

I have a Russian Mk-17 diesel (.09) in my Ringmaster Jr. Any good .10 will do well. I would not exceed .15.

Since you can not remember your Dad using the old engines, make sure they have been broken-in. You might want to flush a little fuel through them before mounting and run them very rich for a few minutes to get any old rust/residue out of them.

Good luck,
George

Yep, when I re-started CL, I put an OS FP20 in a Ring Jr and boy, did it ever screw me into the ground! Wouldn't loop for any amount of money, but it was fast. The strong 10s and weaker 15s are just fine. I have a NIB Tee-Dee .09 coming and kind of wonder if a light Ring Jr wouldn't fly pretty well with it. Think I will do a Flite Streak first, though. If I ever do another Ringmaster, I'll scratch build it and hold the weight down.

I think a lot of confusion is caused by the manufacturer. The text in the plans refers to using a Fox .25 and the picture on the box shows a Fox schnuerle .25. Apparently when the plane was redesigned it was intended for some racing event that never came to be.
Some unsuspecting newbie will sure have trouble keeping up with it in that configuration.
I think the original Ringmaster Jr. was intended for a .09 to .19 of the old 50's baffle type engine. Can't remember for sure and my old mags aren't handy.
A TD .09 should do well. The Ringmaster Jr. has a little thinner wing than the Flite Streak Jr.
Good luck,
George

> I think the original Ringmaster
>Jr. was intended for a
>.09 to .19 of the
>old 50's baffle type engine.
>Can't remember for sure and
>my old mags aren't handy.
>
> A TD .09 should do
>well. The Ringmaster Jr. has
>a little thinner wing than
>the Flite Streak Jr.

The Jr. Ringmaster was my first "big" model, and it was indeed intended for .09-19 50's-vintage engines. It's a tiny model, smaller than a lot of .049 stunters, but built too heavily to use an .049. Even a vintage 19 is a lot of motor for a reasonably well-built airplane, forget a new one. Look for an old, real light 15.

It's not much of an stunt plane unless you drastically lighten it up, use super-slow controls, and have a lot of skill. It's fine for rudimentary sport flying.

Mine had a ST g20/.23, and it went about 100 mph. It also shook itself to pieces on every flight, never ran out a full tank.

I'm turning a hair over 4 second laps with my Jr. Flitestreak and TD 09, 7 x 3.5 Cox grey prop, Sig Champion 10% 50/50 fuel, crankcase pressure off the backplate, 57 ft 012 lines. According to the power curve in the Aeromodeller review, at the speed it is running in the air, @ 16K, it is putting out some 0.22 HP. For comparison, Aeromodeller gives the peak HP for an Enya 09-II as 0.115 at @ 12.5K.

So think of the TD 09 as a small, light, moderately powerful 15 and you'll be in the ballpark. I know the later RC model TD 09's were holding their own running against OS FP 10's in pylon racer in the St. Louis area, so that's another comparison.

I have both the Jr Ring and the Streak Jr. They both like Fox .15 baffle jobs. I agree that an old baffle .19, like the Redhead, is a bit much.

To show you how adventurous I was in my callow youth, I had a Flying (not Super) Clown with an OS Max 35-I. It actually flew. With permanent up, maybe at a 45 degree elevator angle. One flight was enough, however. Friends definitely don't let CL friends do this.

Three Summers ago, I had another Ring Jr. with a Silver Swallow .15 diesel. Way noseheavy. Needed tail weight. Mushy, but flyable.

Right now I am finishing a scratch Vickers Wellesley semi-scale. It has a high aspect ratio wing of 36" span, but only about 166 square inches of area. It will get a baffle OS .10. The Jrs. Ring and Streak are in the low 200 square inch range. It has that big cowl, so I am going to try a 7.5-4 for starters.

I'd bet that a Norvel .074 would work on the Ring. Jr. It has a claimed HP of over .35 at 22K! This is a lot more than the Fox and K & B .15 Greenhead of the looped scavenged era.

I'll try this screamer someday...

I wish more people could be introduced to the old '70s Japanese Kimura line of .15s. Beautiful little jobs, even a mini "Jetco" Shark! Nobler-looking things, too. Only problem is the weight and mystery wood in the kits. Came with just about everything, though, including tank. Grab one if they come up on ebay, and sub to balsa.