PaulWells1966

Need info for plug and fuel type Super Tigre G21 .35 combat with large venturi.
Have pressure tap in place and is on an old reinforced flight streak.

used to know this stuff just long forgot and lost the manual.
Gonna go to the park and scare the kids

the Wasp

My Feedback: (1)

you should ask in my link too, tell if it has a tuned pipe and what head shims are used

https://www.rcuniverse.com/forum/ext...op-planes-104/

Jim

PaulWells1966

It's from the 60's...control line engine with open exhaust. no head shims. G21 .35

PaulWells1966

I just need what kind of glo plug for an old super tigre control line. fox, k&B, enya..? what heat range?

aspeed

K&B 1L was a pretty standard plug for that time. The Fox plugs would bend the element and fail. I would use a low nitro fuel, even though they respond well to nitro. I think the cranks are the weak point. A bit of castor is always insurance. I don't get fanatical about it, but put a bit in just in case the rumours are true. They were pretty popular here for slow combat back in the day, although I never had one myself.

PaulWells1966

thank you! so when you say not too much nitro do you mean 5, 10, or 15?

aspeed

5% is likely enough. Not 25% anyway. There is no need for idle or anything, and it would be hard to get replacement parts from the last millenium motors.