Appropriate .15 engine

[coosbaylumber]

Am still going along with my 1960's era racer. Had originally planned on a certian engine to be mounted up, but the old K&B Series 64 RR is now getting difficult to fire off (due to low compression).

Need another popular .15 cid glow engine with or without muffler, that I should ask around for now. Don't need to be speedy, but has to look it and has to have been one of those in the 1960's to 1970's that were known for such.


Wm.

[RHarding]

I too am looking for an older .15 engine for the old 1/4 midget. I'm dating myself, but still having fun. Bought a Sig Doubler II kit at a swap meet last weekend and will be needing a r/c .15 engine. I have a couple K & B .15 RR but they are u/c. I don't plan on any serious racing, but just want to have a little fun and bring back the good old days. Anyone having any engines in this catagory get in touch.

Thanks,

Richard

[coosbaylumber]

I was thinking the .19 or .20 was a bit more popular for your interests. Used in the original Goodyear events.

I have lotttsa my friends saying Getta Cox, Getta Cox, Getta Cox, as they are more popular and easier to start, obtain parts for etc. Naww, I want something else. Right now, all I can locate if the unthrottled controlliner types.

Wm.

[daven]

The cox conquest .15 was used primarily before the Nelsons came out. They ran well and produced good power. The straight pipe out of the back of the head was a bit loud. I have 3 that still run well, but would never consider selling them. They are not as easy to find as they use to be, but still pop up on ebay occasionally. They are listed on the RJL Mecoa site, but I don't think they have any.

I've been running the master airscrew 8x3 on mine for combat and its been fun.

[a betancourt]

What about a ST X15 FI TST?

What dou think about this engine?

I got this engine NIB from Ebay a t a very good price.

Alfredo

[EloyM]

Magnum has just come out with a new .15 in their XLS blue head series. Haven't tried one, but my .52 runs well. Might not compare with the old QM Cox's and Rossi's, but should be great for sport flying.

[coosbaylumber]

Well, do not have anything personally against the Magnum series, 'cept theytend to have a large cylinder head. I can't find information on it yet, they did not mention such at the AMA show in Ontario either. I really do not want to rearrange things up front in order to fit a huge cylinder head.

As this is an older design, I was thinking on a modern equavalent to an older glow engine. You know, have to keep up appearances.

Wm.

[snow800]

I have a older 1/4 midget plane that I use to race 20 years ago.
It has a Conquest .15 on it with a rear exhaust that Screams!!!.
Compression is great !!!
I even have a few carbon fiber hand made props available that I ran on it.
It has a aluminum spinner on it also with fuel tank installed.
I have a few sets of landing gear with it also.

I am not sure what the kit is, but it has a 3 channel setup for those not familiar with the planes (aileron, elevator and throttle pinch to shutoff ) that has a fiberglass fuse that mirrors a little toni type airplane, it is red in color.

I would say the plane is a 8.5 to 9 as it has never been crashed or dorked, very very slight hanger rash.
The covering on the wing has a few wrinkles on it.
The paint on the fuse is nice, few minor blemishes.
It flys great and straight.

I did not build the plane, I bought the plane off a friend years ago and put my engine and radio in it.

It is ready to fly as soon as you add your reciever.
It has 3 Futaba S-148 servos in it with the switch harness installed.


I would let it go as a whole for reasonable offer with or without the radio gear.
I will not sell just the engine
Mike

[coosbaylumber]

That resembles my Midget Mustang of the 1970's, except for the glow engine sticking out.

Wm.

[wpifarmer]

If you can find them, you would do well with a Norvel .15. Either the BB or the plain bushing. They are a bit smaller than your average .15, but do very well in the air. So they may fit into your application quite well being good performance and smaller .15 form factor.

The trick is finding one. :)

Farmer


Well, do not have anything personally against the Magnum series, 'cept theytend to have a large cylinder head. I can't find information on it yet, they did not mention such at the AMA show in Ontario either. I really do not want to rearrange things up front in order to fit a huge cylinder head.

As this is an older design, I was thinking on a modern equavalent to an older glow engine. You know, have to keep up appearances.

Wm.

[Conquest 15]

The cox conquest .15 was used primarily before the Nelsons came out. They ran well and produced good power. The straight pipe out of the back of the head was a bit loud. I have 3 that still run well, but would never consider selling them. They are not as easy to find as they use to be, but still pop up on ebay occasionally. They are listed on the RJL Mecoa site, but I don't think they have any.

I've been running the master airscrew 8x3 on mine for combat and its been fun.


If you or anyone on this site has any questions about the conquest 15 and what makes them run just email me,I am Ron Young and know more about this engine than RJL or the engines that K&B made.

[Conquest 15]

I have a older 1/4 midget plane that I use to race 20 years ago.
It has a Conquest .15 on it with a rear exhaust that Screams!!!.
Compression is great !!!
I even have a few carbon fiber hand made props available that I ran on it.
It has a aluminum spinner on it also with fuel tank installed.
I have a few sets of landing gear with it also.

I am not sure what the kit is, but it has a 3 channel setup for those not familiar with the planes (aileron, elevator and throttle pinch to shutoff ) that has a fiberglass fuse that mirrors a little toni type airplane, it is red in color.

I would say the plane is a 8.5 to 9 as it has never been crashed or dorked, very very slight hanger rash.
The covering on the wing has a few wrinkles on it.
The paint on the fuse is nice, few minor blemishes.
It flys great and straight.

I did not build the plane, I bought the plane off a friend years ago and put my engine and radio in it.

It is ready to fly as soon as you add your reciever.
It has 3 Futaba S-148 servos in it with the switch harness installed.


I would let it go as a whole for reasonable offer with or without the radio gear.
I will not sell just the engine
Mike

If you need any help with your engine let me know. I am Ron Young and I built these engines for years.

[Konrad]

Ron,

Welcome to RCG.

I ran these for years. I found that the inner bore of the crankshaft was restrictive and that the rods where questionable. Did you find that these two things were the major limitation. To the P&L, did you make your own or were they fitted from Rossi stock. What do you know about the RJL ABC P&Ls? I found that stock the engine produced power in the 27K range but failed at about 23K rpm.

Are you still winding R/c car motors?



Konrad

[Terryoc]

Have a look at some of the Car engines . In Australia we race QM with 21 motors which are mostly modified car motors.
For something to fly evan a 12 size would do as they are closer to a 13 than a 12 and probably a lot better than the 15's of the 70's and 80's

[Konrad]

You don't know the Nelson or Ron Young 2.5cc ( 0.15 cid) engine. With slight modification they will were bullet proof. I still love the Nelson plug (mod. Glow Bee).
Konrad

[Thekid3418]

I can second the new magnum thats out. Turns an 8x3 at 19000 rpm with a stock muffler, i could only imagine a pipe with a smaller prop, that would be awesome

Also, whta about the RJL .15, they are pretty stout little monsters...

[coosbaylumber]

I do not have anything against the RJL engine, 'cept that it is a bit "too Modern" and puts out more poop that I think the airfame and wing will hold up to. Which is why am looking for a "calmer" screamer. w/o pipe too, please.

Wm.

[Konrad]

Cox/K&B/RJL 0.15 cid can be made into a dog just by putting too large a prop on it.
Actually the Cox Conquest with the stock muffler, small Perry Carb, a Top Flight 8x4 prop on Fox Missle Mist (25% nitro and castor oil) makes a very nice sport engine. It also runs fine on the extractor. Note: An extractor is not the same as a pipe.

Konrad

[Conquest 15]

Ron,

Welcome to RCG.

I ran these for years. I found that the inner bore of the crankshaft was restrictive and that the rods where questionable. Did you find that these two things were the major limitation. To the P&L, did you make your own or were they fitted from Rossi stock. What do you know about the RJL ABC P&Ls? I found that stock the engine produced power in the 27K range but failed at about 23K rpm.

Are you still winding R/c car motors?



Konrad

I never had any problems with the Rods or the cranks,these engines set up correct with the A.B.C. P/L were very good engines. I am starting to rebuild these engines again using A.B.C. P/L and also have iron pistons to replace the old centered Iron pistons that were in the original Conquest 15 engines. When Q.M. was big Ken Hulick went 1:11.0 with one of these engines using a carbon fiber prop he made and could have went faster.

Ron.

[Conquest 15]

I have a older 1/4 midget plane that I use to race 20 years ago.
It has a Conquest .15 on it with a rear exhaust that Screams!!!.
Compression is great !!!
I even have a few carbon fiber hand made props available that I ran on it.
It has a aluminum spinner on it also with fuel tank installed.
I have a few sets of landing gear with it also.

I am not sure what the kit is, but it has a 3 channel setup for those not familiar with the planes (aileron, elevator and throttle pinch to shutoff ) that has a fiberglass fuse that mirrors a little toni type airplane, it is red in color.

I would say the plane is a 8.5 to 9 as it has never been crashed or dorked, very very slight hanger rash.
The covering on the wing has a few wrinkles on it.
The paint on the fuse is nice, few minor blemishes.
It flys great and straight.

I did not build the plane, I bought the plane off a friend years ago and put my engine and radio in it.

It is ready to fly as soon as you add your reciever.
It has 3 Futaba S-148 servos in it with the switch harness installed.


I would let it go as a whole for reasonable offer with or without the radio gear.
I will not sell just the engine
Mike

Its looks like you have a Tery Prather little Toni.

[CryHavoc]

I do not have anything against the RJL engine, 'cept that it is a bit "too Modern" and puts out more poop that I think the airfame and wing will hold up to. Which is why am looking for a "calmer" screamer. w/o pipe too, please.

Wm.


An engine that is woefully underestimated is the little Fox .15BB. Its an ABC engine that is an excellent little sport screamer. It would definitely be a period looking engine that will run on modern fuels and is small and light. I have one that I run an 8x4 on YS 20/20 and it really goes. Its no Nelson so I don't think it'd be too much for your plane. The problem will be finding one as I think the only place to get one now is directly from Fox. Just remember to ask for the ABC version. The carb is a little chinsy looking but it is a two needle job that actually works well. I love mine and would put it up against a Magnum any day.

Mike

[Alexandre Cruz]

The .15 engine I know to be the best performer is the russian F1C engine http://www.rusengines.ru/?lang_upd=en however it will cost you a fortune, 2000-3000 rpm over a Nelson does not come at a low price.