Thanks Tom!
You saved me from having to tromp out to my out building (it's raining) and digging through my stuff!
Amazing that R/C carb is STILL epoxied onto the the engine in that last photo! An epoxied carb wasn't one of Duke's finer moments. When the epoxy failed, typically the carb swung into to the arc of the spinning propeller. Not good.
A follow up:
Though the carb on the 36X R/C was really a pretty decent carb (when everything was "right") it was finicky about production standards. As I recall it had idle, mid, and high speed adjustment needles. A good example, dialed in nicely, would idle very slow and the response to full speed would be instant. In my mind I can still hear Chester running those out in the engine shed... prrrrrrrr.. BRAPPP.... prrrrrr... BRAPP... BRAPP. Yup, I can still hear evidences of my years at Fox 24/7 in my ears: Riiiiinnnnnnnnngggggggggg.
Duke decided to throw in the towel on the 36X R/C and designed an entirely new sleeve bearing case and two-needle simpler carb. This carb was held in place with set screws. The case, back plate, and head were much lighter than the X model. All the innards were essentially 36X. Unfortunately, this new case was fraught with issues, and it was this line of 36 engines that I cut my teeth on when first given the Assembly department, but that's another story told before.
NOTE to X fanatics: The reuse of the 36X innards in a 36 R/C means that if you can pick up a nice example of the 36 R/C that replaced the X R/C, you just picked up an entire replacement parts set for the piston, sleeve, crank, wrist pin, connecting rod, head gasket, for your favorite 36X NB case. Also, I think I recall the 36 series back plate had less slop (case stuffer) so it's usable on an X and provides marginal case-stuffing gains compared to the stock X back plate.
This is NOT the case (pun!) on the Fox 36 C/L "Sport" engine: The case, thus crank, was shorter, so the crank will NOT fit a 36X NB.
Over the decades, for my nostalgia combat models, the 36X NB became my preferred engine on account of the crank issue vs a BB version. At the time I theorized that by using NB versions I could keep them alive longer on account of complete innards interchangeability with the 36 R/C. In actuality that proved to be over-thinking (I tend to do that) because I never flew my models enough to even START to wear out the innards!
Oddly, I've super enjoyed recalling, typing out, and sharing these past few posts.
All fer now.
Andre