Geezz Randy you sure took the wind out of my sails. I was all set for a big long winded answer and your saying wow, stop, the engine is not suitable. Well as I think back most of that era's engines all vibrated some just more than others. Randy did his home work and knows a lot more than I do about the G21 .35 so I'm not much on that engine but I can sort of answer your question. The Nostalgia rules say nothing about carburetors, the word is nowhere to be found in the rules section so yes you could use a Perry Carburetor if you wanted to. I like the Perry's and have used them on a lot of different engines and they work well if you follow the instructions. As for size, you measure ID of the throat on the engine your going to put the carburetor in and write that down. Then you have to make a guess as to how big the inside diameter should be that will allow you to make top RPMs and still give you a reasonable fast idle because you probably will not be putting your plane in a hang just flying it around as slow as the plane will fly. Now you write this mystical measurement down next to the engine throat ID. Now you move an inch or so over to the right of these figures and write "Perry ID and OD"and put your figures under ID and OD.
Now you go to Perry's web page and get up on Carburetors and scan down till you come the many different carburetors and look for the one that comes nearest to your two measurements. Oh, and if you want to look at the Nostalgia rules you can go up on "navycarriersociety.org" then go to rules, then go to Nostalgia Rules and you wont find carburetors mentioned anywhere. Hope this helps, it has for me many times. Eric
Topic: Carb for G21 .35 Combat motor (Read 1368 times)