I am also printing some patterns for a jumbo ball hopper monitor IC engine.

The pattern is about 13" diameter, and after double shrinkage and machining it should finish out at about 12" diameter.

I will cast permanent pattern halves in 356 aluminum.

The 3D model was created in Solidworks.

The spokes are not true ellipsoidal, because lofting those is problematic, but I will sand the spokes on the pattern to an ellipsoidal shape before casting the flywheel in gray iron.

I have the VJ on my list, and I think the flywheel is close enough that I could use it on a VJ or a Ball Hopper, but this flywheel print will be used for the Ball Hopper Monitor.

I will attach a photo which I think is one of your builds.

Also attached are the beginnings of some of the other 3D models for this engine.

Edited By PatJ on 10/03/2019 18:15:23

Here is the logo that I carved out of a block of linoleum.

It is flexible, so I will adhere it to the gas tank before I make a casting.

In my haste to find new things to try out on the printer, I neglected to include the hub clamping bosses and spoke bosses, and so I will have to add those to the plastic patterns before I make the aluminum permanent pattern.

For the balancing grooves, at this point I could gouge them out of the plastic, or cut them in the permanent aluminum pattern.

I may make a rough cut for the grooves in the plastic that is undersized, and clean it up in the aluminum pattern.

Thanks for pointing that stuff out.

Small but important details for sure.

Thanks, looks like I have a bit of work to do before trying a casting.