Road roller engine completed and running
- I finally got the parts for the roller engine finished and test ran
the unit for about 20 minutes while I played with carb settings.
The engine is about 80% ETW design, I changed the detailing of the
camshaft, contact breaker and carb. At the moment it's back in
pieces for painting.
The biggest change was incorporating a float chamber into the basic
suction carb design. I used the float chamber from ETW's 1831
locomotive engine, the result is a less sensitive carb and better
slow speed operation.
Other minor changes included making taper lock style bushings for
the engine cams and contact breaker cam, that way I could adjust
them and test run the engine without having to cross drill the
Overall I'm pleased with the engine, for a design from 1938 it is a
very competent rendering of the original Ruston CSB compression
I can press on with the rest of the roller now, I will be straying
from the ETW design in terms of external appearance, following the
prototype a bit more faithfully.
Assuming no computer glitches I will try to post a picture of the
completed engine on its test run.
Any other ETW model roller builders out there?