Originally Posted by
lfinney
mb 40 engines use the ball on crank scheme as well..IIRC
The limiting factor with our model engines has been the size of the tunnel going through the crank, so it makes sense to go this route.
I don't know what the pitfalls are during manufacturing to get the heat treating just right.
An ambitious engine man could see if the OPS speed engines could be retrofitted with this same idea and cram an extra large crankshaft into one of those. OPS has that modular case design, so it seems like the biggest chore would be producing the larger shafts. Some German speed freaks are probably already working at this.