Ball Hopper Monitor - Casting Project

[Alyn Foundry]

Some progress on the Petter Apple top. Core box with register for correct alignment with the spark plug aperture. The core will sit vertically in the Drag ( bottom box )

 

[GreenTwin]

Some progress on the Petter Apple top. Core box with register for correct alignment with the spark plug aperture. The core will sit vertically in the Drag ( bottom box )

That is some really clean looking pattern work, especially that LETTERING !
You are definitely on a roll with that engine.
Impressive !
.

 

[Jasonb]

I can take the credit for the lettering CAD . For an idea of size the letters are 5mm high x 1mm extrusion. Printed nicely on the P1S. Doing the letters separately and setting them into a groove in the main casting means the letters can be done with a fine layer height and won't get damaged when sanding the main pattern

The black parts are carbon reinforced filament. Interesting to see if it's strength allows a thinner wall and less percentage of fill. If it does that will offset the highter cost of the carbon over PLA with the bonus of shorter print times as there is less material being printed.

 

[Alyn Foundry]

Here’s a selection of photos…. In fact the printer wasn’t able to do one job because of the nozzle limitations.

 

[Alyn Foundry]

The Carbon fibre PLA is exceedingly tough but only a trip to the foundry will prove one way or the other.

 

[GreenTwin]

Are you planning on filling around the lettering a bit, or are you going to try and pull it as-is ?
.

 

[Fidlstyks]

This is a 6HP (plated 5 1/2HP) Manatoba built engine not a 7HP

I found that engine, it was in KansasCity, now in Arkansas.
He said they are the same enough that he bought a Monitor engine and took the parts off of it, to finish the Manitoba. Monitor is now missing valve chest , carb, muffler and rod
He said the main difference is that the Manitoba has no part numbers. And has square gas tank

 

[petertha]

I envision the thinned fastpatch as having the consistency of slightly thick latex paint.

Not sure what airbrush you ordered but that sounds problematically thick from my experience. Guess you will find out soon enough. I would have gone for a mini HVLP 'touch up' gun. Even a cheapo knock off. Those have viscosity limits too, but that style of gun typically has a wider range needle/cap orifice combinations to try. You can typically dial that size of gun down to say 1.5" spray fan but its also a function of viscosity. Good luck. Cant wait to see some of these 3DP parts turn into metal, ultimately.