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Frisco Standard - Casting Project

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CI:
During COVID, I tried to get some Hicks marine engine drawings from the museum out west, but everything was shut down, and they never responded to my emails.

I was able to find some material on a Frisco Standard, and so have been 3D modeling that, with the intent of casting the parts one day.

I saw the new thread on the Hicks model on grabcad, and it reminded me of my Frisco Standard work.

The Frisco Standard uses a side shaft, with 2:1 helical gears.
JasonB has provided me with a nice 3D model for the gears I need.

Rather interesting head and valve design on the Frisco Standard, and perhaps a bit more difficult to make than a Hicks.
I like the Hicks design, but have come to like and appreciate the Frisco Standard design also.

I used Solidworks to play around with some molding options on the head.

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CI:
Here are the JasonB-designed 2:1 helical gears that I 3D printed.
They mesh and operate flawlessly, and can be 3D printed at any size.
I will probably have to use some sort of investment process to cast these gears.
I am not going to try to cut them from blanks.

It is a bit of a trick to design 2:1 helical gears.
I got close to a viable design in Solidworks, but not close enough for a functional set of gears.
JasonB nailed the gear design.

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CI:
Here is a print I found online somewhere (can't recall where).

I don't have any go-by Frisco Standard drawings, but did find some original patent drawings on the head, and that has been very useful.
The exact scale of this model is to be determined, but I generally like a 2 inch diameter piston minimum.

Supposedly a very reliable and rugged marine engine, with ignitor ignition (no spark plug).

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CI:
A video of a nice 5hp Frisco Standard running.
It took me a while to get the valve gear geometry worked out on my 3D model.


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http://www.youtube.com/watch?v=q7l_Vy9BfG4

maury:
CI, this looks like a really fun project. I have a 2 cyl Frisco Standard on my bench being worked on intermittently.

I could probably help you with the 2:1 helical gears. I have a Barber Coleman gear hobber that would make short work of them. I've done several 90 deg 2:1 helical designs for other engines.

maury
Lone Star Engine Works Retired

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