Jasonb

If you can sort out your rubbing threading tool then I would cut that one oversize, not really critical what the diameter is as the...

A quick little project that was prompted by a couple of threads on ME Forum where a member was having problems with a Stuart Dynamo...

36mm diameter

If they are cast from castings as he says then watch the sizes!

But you don't seem to know the various settings of the printer or ways to finish the prints . Moving so fast you are getting ahead of...

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...

You adjust the valve looser so that it is drawn towards the power piston as the piston moves towards BDC which restricts the flow or...

Looking at the drawing in the mag I read it as thread 1x 32" and then open up the top to 1" dia x 0.187 deep. Thread will need to go...

Your tap is 1" x 32NS from the photo so that is a 60deg thread form so stick with that and don't change to 55deg Typical tapping size...

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...

Pat how does patent come into it, neither model engine is patented so no patent claim. At best it's copyright but more likely as the BW...

If you are going to single point the cylinders then 60 or 55 won't really matter provide you use the same for both. So will depend on...

The Blackwidow was an improved Challenger so it has it's roots in that first design. A bit like your 4HP hopper being an improved...

So which one of these gentlemen are you Casted? https://craftsmanshipmuseum.com/exhibit/challenger-v8-prototype-engine/

The contents of these two are more than beginners engines and all can be done from barstock...