Chris,
With a few engines (in fact at least 50%, maybe more), when made from the plans, they do require fine tuning and tweaking.
When I made my elbow a few years ago, I think it was about 1/16th on an inch I had to remove from the end of each piston, it all depends on the final radius of the bend you end up with.
This is where most beginners meet their downfall. They hit a problem with plan dimensions, and because of lack of experience, they don't know where to start looking when trying to solve it.
That is why you should NEVER take plan dimensions as though they were gospel, expect them to be wrong somewhere, and when the engine finally runs, you can give yourself a big pat on the back and a Cheshire cat grin.
John
With a few engines (in fact at least 50%, maybe more), when made from the plans, they do require fine tuning and tweaking.
When I made my elbow a few years ago, I think it was about 1/16th on an inch I had to remove from the end of each piston, it all depends on the final radius of the bend you end up with.
This is where most beginners meet their downfall. They hit a problem with plan dimensions, and because of lack of experience, they don't know where to start looking when trying to solve it.
That is why you should NEVER take plan dimensions as though they were gospel, expect them to be wrong somewhere, and when the engine finally runs, you can give yourself a big pat on the back and a Cheshire cat grin.
John
