Need help with an unusual .051 cylinder

Admin wrote:Hmm

You ruled out the NFFS and Killer Bee...

Let me think about it. Does a .051 TD piston fit in it?

Cox International wrote:

Admin wrote:Hmm

You ruled out the NFFS and Killer Bee...

Let me think about it. Does a .051 TD piston fit in it?

Yes, yes, it's an 051 SET.

ticomareado wrote:Did it come from China?

Admin wrote:

Cox International wrote:

Admin wrote:Hmm

You ruled out the NFFS and Killer Bee...

Let me think about it. Does a .051 TD piston fit in it?

Yes, yes, it's an 051 SET.

What I was meaning by asking is that from my understanding is that Killer Bee .051, TD .051, and NFFS .051 pistons are not interchangeable, even though they are all .051 pistons.
This one definitely fits with a .051 Medallion piston.

Was it in factory packaging? The packaging could help with placing a date and maybe trying to get an idea of what they had in mind.
No, just loose and actually found a second set.

There was a moment back in the early 80s when Cox was fitting slit cylinders on many engines (excluding TDs) in effort to keep flames from coming out of the exhaust ports. They probably even toyed with creating a Medallion .051 before the NFFS approached them.
Possibly but then how does someone in Vancouver end up with two of them? We have handles 1,000's of cylinders and have never seen one; and obviously no one so far reading this thread.

If it appears to be from the early 90s, if could be related to the development of the NFFS Medallion.
Could be but see comment above.

Unfortunately without actual knowledge of a specific engine using the cylinder, it's all speculation as to why it exists.

Maybe Mark knows something.

Mark Boesen wrote:I'd contact Bob Smith(?) to verify NFFS, single port on each side doesn't seem right. I've never had a really great interest in anything made  after mid seventies

GallopingGhostler wrote:Does the set eliminate SPI? Didn't in the late 1980's Cox also market a .051 Tee Dee R/C?

Cox International wrote:There is no SPI but I believe that the 050RC has open ports and not slit-exhausts. Can't check before Monday as I am not at the office.

However, this is the chap that sent a dozen modified engines to us, such as these and am beginning to wonder if he opened up the cylinder himself. Will call him on Monday.

E-Bay: #14 - 049 Cox Tee Dee Experimental Hybrid Engine .049


E-Bay: #10 - 049 Custom Space Bug Black Widow Style Mix .049


E-Bay: #06 - 049 Custom Space Bug Tee Dee Style Mix .049


E-Bay: #05 - 049 Custom Cox Black Widow Tee Dee Style Mix .049

GallopingGhostler wrote:

Cox International wrote:There is no SPI but I believe that the 050RC has open ports and not slit-exhausts. Can't check before Monday as I am not at the office.

However, this is the chap that sent a dozen modified engines to us, such as these and am beginning to wonder if he opened up the cylinder himself. Will call him on Monday.

E-Bay: #14 - 049 Cox Tee Dee Experimental Hybrid Engine .049


E-Bay: #10 - 049 Custom Space Bug Black Widow Style Mix .049


E-Bay: #06 - 049 Custom Space Bug Tee Dee Style Mix .049


E-Bay: #05 - 049 Custom Cox Black Widow Tee Dee Style Mix .049

Certainly an interesting combination of engines.   Top one, side port is unique. Those type engines to include the 1963 A.C. Gilbert .074 & .11 and late 1950's Fox .09 Rocket were easy runners, but never known for being very powerful. .074 had the power of a Cox .049 Babe Bee. Larger .11 and Fox .09 were a very mild 1.5cc engine to say nonetheless.

My guess is that the Cox custom side port .049 is probably as powerful as a .020 Pee Wee.

Mark Boesen wrote:I'd contact Bob Smith(?) to verify NFFS, single port on each side doesn't seem right. I've never had a really great interest in anything made after mid seventies