Jumbo Ball Hopper Monitor

[PatJParticipant @patj87806]

Jumbo Ball Hopper Monitor

[PatJParticipant @patj87806]

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.

[JasonBModerator @jasonb]

Looks good Pat, is this for the VJ or one of the larger Monitors?

[PatJParticipant @patj87806]

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

[PatJParticipant @patj87806]

I think that first screencap I posted was an early 3D model for the flywheel.

This one seems to be my latest version, and I think is the one I used to print with.

[PatJParticipant @patj87806]

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.

[JasonBModerator @jasonb]

That's going to be quite a beast based on the size of the one I made. You may want to cast in the balancing grooves as they need a fair sized rotary table if they are going to be milled though my Soba coped ok with the 9" radius and 11mm bull nose cutter.

What will you do about the clamping bosses on the hub?

[PatJParticipant @patj87806]

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.

[JasonBModerator @jasonb]

Also the bosses for the governor weight and spring on one wheel and the bosses for the take off pulley on both will be needed

[PatJParticipant @patj87806]

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

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