dgjessing
Well-Known Member
- Joined
- Feb 16, 2010
- Messages
- 295
- Reaction score
- 9
After a couple of attempts I was unable to make a workable built-up crankshaft for "take one": http://www.homemodelenginemachinist.com/index.php?topic=17090.0
I might try it again now that I've straightened up my mini-mill per these excellent instructions: http://www.homemodelenginemachinist.com/index.php?topic=6007.0
But at any rate, I've started on a completely new version. This time, I did the crank first, and am building around it. The crank is carved out of one piece of 3/8" CRS plate:
... after some time on the lathe:
Much better than the built-up attempts!
Also, since I know how to make gears now, the new version is going to have the valve shaft up in the head, gear driven:
It's going to have a 5/8" bore, 3/4" stroke. The crank will run in ball bearings, but they haven't arrived yet. (I'll be boring out the end plates for them once they get here...)
I might try it again now that I've straightened up my mini-mill per these excellent instructions: http://www.homemodelenginemachinist.com/index.php?topic=6007.0
But at any rate, I've started on a completely new version. This time, I did the crank first, and am building around it. The crank is carved out of one piece of 3/8" CRS plate:
... after some time on the lathe:
Much better than the built-up attempts!
Also, since I know how to make gears now, the new version is going to have the valve shaft up in the head, gear driven:
It's going to have a 5/8" bore, 3/4" stroke. The crank will run in ball bearings, but they haven't arrived yet. (I'll be boring out the end plates for them once they get here...)