Another version of how not to build a model engine

Gallery, Projects and General > Project Logs

<< < (16/41) > >>

sorveltaja:
Nick, the vapour carburetor is most certainly next thing to test, if the current carb doesn't give good results.

I soldered the parts together, and noticed that the carb throat was filled with solder also.

Took it apart, drilled the holes open, and removed rest of the solder. After cleaning the parts, plan B was to try super glue. It seems to work better in this case :thumbup:.

sorveltaja:
I had to add an extension piece for carb, so that it's possible to put in place and remove it without removing breaker/cam combo:

Now the carb throat has 0.7mm(~0.027") diameter, and the engine fires with that, but doesn't run.

Next thing is to drill the throat to 0.8mm(~0.031"). Cleaning the carb after drilling might be more difficult, without having to disassembe it, as it's little more complex, than the previous ones.

sbwhart:
Thats developing into a great little engine:- :clap: :clap: :clap:

Stew

sorveltaja:
Thanks for kind comments :wave:.

Here is a cross section sketch of that carburetor:

Basically the principle is same, that has been used at least on small commercial glow engine's carbs. That concept makes it possible to make a carb, that's needle doesn't intrude across the throat.

Bernd:
S,

I don't see any "venturi", just a straight hole to the engine in your drawing. I recall that the glow plug engines all had some kind of venturi on the carburator before the fuel got mixed in with the air. :scratch:

Bernd

Navigation

 Message Index

Go to full version