Model engine bore size

[JamesPruitt]

I am attempting a build of lycoming o360. If you use a 1/4 scale the bore size will be 1.25" is this to big for a model engine
thanks dave

 

[Brian Rupnow]

No, model engines can be any size you want. Most of mine are 1" bore. There is no governing body that determines what can and can not be called a "model engine".

 

[stevehuckss396]

I'm with brian on that one. As long as the replica is smaller than the original i would call it a model even if it is only 10% smaller. If the build is the same size then it would be a recreation.

 

[rklopp]

I am attempting a build of lycoming o360. If you use a 1/4 scale the bore size will be 1.25" is this to big for a model engine
thanks dave

How big is your machinery? I suggest don't try this at home on a Sherline, though there is probably some prodigy who could pull it off with a file and a hammer. On the other hand, you should have no capacity issues, per se, with a Myford or SBL.

 

[JamesPruitt]

thanks for the quick responce will post some pictures as soom as i get started still in design

 

[JamesPruitt]

I have a shopmaster machine.
thanks Dave