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Need to identify this engine (Please look at page 2)

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Need to identify this engine (Please look at page 2)

Post  coxaddicted on Sat Jul 21, 2012 4:47 am

Hi, I tried to find out which engine it is. But I like to ask the experts here to be sure.







It has a thimble drome mark on the tank. On the backplate is written Made in USA.
This engine was built in a cox cl warhawk from 70`s. The plane looks like never used (no castor oil or other residues), but the engine might be. I am wondering if this original, as I also never have seen this combination before (with a muffler).


Last edited by coxaddicted on Mon Feb 04, 2013 1:57 am; edited 1 time in total
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Re: Need to identify this engine (Please look at page 2)

Post  Kim on Sat Jul 21, 2012 7:25 am

Looks like a QZ .049.

From Mr. Hepperle's Site:

http://www.mh-aerotools.de/airfoils/cox_frameset.htm
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Re: Need to identify this engine (Please look at page 2)

Post  coxaddicted on Sat Jul 21, 2012 7:41 am

Thanks a lot. So it could be original fitted in a cl warhawk I think.

I just bought another engine at ebay (and maybe I will buy a couple of engines if the price is not too high). If it does not bother anybody, I will post it here after receiving it.
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Re: Need to identify this engine (Please look at page 2)

Post  RknRusty on Sat Jul 21, 2012 9:17 am

That would be a Super Bee from a P40 Warhawk. A Babe with dual bypass ports. I had a P40, but for some reason I can't locate the tank with Thimble Drome printed on it. When I was a kid, one of the carwash workers nabbed a Bee out of our back seat, maybe that's the one I'm missing.

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Re: Need to identify this engine (Please look at page 2)

Post  microflitedude on Sat Jul 21, 2012 9:45 am

Is that a high compression head? (there would be rotary knurling on the top of the head)

Can you get the cylinder off? Some numbers/letters would help.
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Re: Need to identify this engine (Please look at page 2)

Post  RknRusty on Sat Jul 21, 2012 10:38 am

microflitedude wrote:Is that a high compression head? (there would be rotary knurling on the top of the head)
.
No, I can tell by the shape of the combustion chamber in the third picture that it's a standard compression head.

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Re: Need to identify this engine (Please look at page 2)

Post  lousyflyer on Sat Jul 21, 2012 11:20 am

The prop and spinner look like they are from a P40 Warhawk, but I don't remember any p40 having a muffler.

All the Super bees that I remember had the heavier crankcase snout on them, as well.

But I am old and my memory is not as good as it used to be, so...um...what were we talking about again? OH yeah, the bee.

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Re: Need to identify this engine (Please look at page 2)

Post  coxaddicted on Sat Jul 21, 2012 12:09 pm

Yes indeed, I also never seen a engine with muffler on a warhawk, therefore I ask.

Maybe the thief who stole RknRusty's the bee installed it into a brand new warhawk, shipped it to europe, waited a couple of years and sold it to me. lol!

The head has no knurlings. I tried to disassemble the engine, but the cylinder has no keyways for the cox-tool. How do you remove the cylinder with a gripper? Sorry for those questions but I do not want to ruin the engine

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Re: Need to identify this engine (Please look at page 2)

Post  Cribbs74 on Sat Jul 21, 2012 1:25 pm

There are a couple ways.

Strap wrench or leather strip and pliers the leather strip bring wrapped around the cylinder and the pliers around that.

That is the only way pliers are to be used on these engines Very Happy

Hope that helps

Ron
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Re: Need to identify this engine (Please look at page 2)

Post  Cribbs74 on Sat Jul 21, 2012 1:27 pm

Oh wait, there is another way a bit riskier but, soft wood either side of the cylinder clamped in a vice would work.

Easy on the clamping force though.


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Re: Need to identify this engine (Please look at page 2)

Post  ahrma_581 on Sat Jul 21, 2012 2:05 pm

'n solvents n' heat (Lösungsmittel und Hitze: thanx to babelfish!)

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Re: Need to identify this engine (Please look at page 2)

Post  RknRusty on Sat Jul 21, 2012 2:32 pm

Okay people, I'm gonna start a rash of people telling me I'm nuts.

A Cox wrench that hasn't been warped or bent, slips over the exhaust ports without touching the inner edges that get galled and interfere with the piston. But it's so soft that it spreads when you apply pressure to a too-tight cylinder and mars it. BUT... if you clamp the whole wrench, including the fork, into a vice tight enough to keep the fork from from spreading, slip the upside down cylinder into the forks while holding the crankcase, and unscrew it, it works every time and will never gall your exhaust ports.

Okay, you may pile on now.

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Re: Need to identify this engine (Please look at page 2)

Post  dckrsn on Sat Jul 21, 2012 3:36 pm

As a last resort, after heating the crankcase with a
small torch, I have used a wrench through the exhaust ports.
Works like a charm.
I would never admit it though............ DAMMIT!


Last edited by dckrsn on Fri Sep 19, 2014 7:02 pm; edited 1 time in total
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Re: Need to identify this engine (Please look at page 2)

Post  lousyflyer on Sat Jul 21, 2012 4:13 pm

Will the standard Cox wrench fit through the slot in the muffler housing? I haven't had one of those mufflers for quite some time.
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Re: Need to identify this engine (Please look at page 2)

Post  lousyflyer on Sat Jul 21, 2012 4:19 pm

Stick it in the oven at 350F for about ten minutes and the aluminum crankcase will heat up faster than the steel cylinder, allowing the threads to loosen up.
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Re: Need to identify this engine (Please look at page 2)

Post  Admin on Sat Jul 21, 2012 9:51 pm

I'm almost sure you have a post 1962 Babe Bee with a muffler added later on. Does the engine have SPI? Is it a double bypass?

I have tried many different ways to remove cylinders, the one that seems to do the best is a leather strap wrapped around the top of the cylinder several times and then very slowly tightened up in a vice grips. If it is on there too tight for the vice grips to loosen it, I use my small torch to heat around the threads on the crankcase and then try again.

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Re: Need to identify this engine (Please look at page 2)

Post  RknRusty on Sat Jul 21, 2012 10:51 pm

Oh yeah, I forgot about that muffler blocking access to the exhaust ports. Throw that thing in your box when you get it off, they don't do much anyway. Besides, iirc, a Super Bee has spi.

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Re: Need to identify this engine (Please look at page 2)

Post  coxaddicted on Sun Jul 22, 2012 7:22 am

Thank you all for your answers. I did not get the cylinder off, it is really tight. I have a little gas torch but no bench vice (but I will buy one).
I will carry it off in a few days, I hope.

I have seen through the crankcase, that the cylinder has open exhaust ports and 1 bypass port with no bypass bosters.

I have also seen through the muffler, that somebody already tried to get the cylinder of with the cox tool as described above.

So it is clear that the engine was opened from a previous owner.
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Re: Need to identify this engine (Please look at page 2)

Post  coxaddicted on Sun Jul 22, 2012 9:11 am

Heat helps Very Happy



It is a #2 stamped on the cylinder

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Re: Need to identify this engine (Please look at page 2)

Post  Admin on Sun Jul 22, 2012 12:33 pm

Yeah, you have a Babe Bee that someone put a muffler on. I would say around the early 1960s, so far the details would say it is a post 1962.

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Re: Need to identify this engine (Please look at page 2)

Post  lousyflyer on Sun Jul 22, 2012 12:42 pm

That's a great Babe Bee. I learned to fly control line with the same type engine mounted on a PT19 trainer.
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Re: Need to identify this engine (Please look at page 2)

Post  coxaddicted on Mon Jul 23, 2012 3:29 am

Running ! Beer Cheers
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Re: Need to identify this engine (Please look at page 2)

Post  coxaddicted on Wed Jul 25, 2012 4:49 am

As written before I received another engine purchased from Ebay.
I already search at Mr. Hepperle's Homepage regarding the modell but I like to ask here to be sure.

It looks like a product engine from the 70's but i am surprised about the exhaust port (it is slotted)

Here is a picture:


Thank you in advance
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Re: Need to identify this engine (Please look at page 2)

Post  nitroairplane on Wed Jul 25, 2012 6:20 am

That's a later product engine, later cox engines had slotted ports.
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Re: Need to identify this engine (Please look at page 2)

Post  coxaddicted on Wed Jul 25, 2012 7:47 am

nitroairplane wrote:That's a later product engine, later cox engines had slotted ports.

Thank you!
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Re: Need to identify this engine (Please look at page 2)

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