Rotary Vee Engine

First an update on the project over the last few days.
The next two pictures show how the end plates and the cylinders are assembled. The brass nipples are where the air supply is attached and for the exhaust air.
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A close up view of the end plates front and back. Using a surface plate and 600 sand paper I sanded the end plate and the cylinder ends for a good fit.
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This is one of the piston assemblies that shows the scratches and swirl marks on the piston caused by them binding in the aluminum cylinder.
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The motor will run for a very short time but then it binds up.

I believe I made two fatal mistakes when I started this project. I made the cylinders out of an unknown grade of aluminum that was difficult to turn and drill. It seemed to be gummy but I used it anyway thinking it would be OK for this.

Using brass for the pistons was probably not the best choice either. A steel piston in a steel cylinder may have been a better choice.

I am not giving up on this project but letting it rest a while for now as I think it over some.

Thanks for looking
Ray
 
If you did brass on brass would the mass of the cylinders substitute for a flywheel? Perhaps brass is too soft anyway?
 
rwm said:
Perhaps brass is too soft anyway?
Click to expand...
I think it is too soft for the pistons but might be alright for the cylinders.
I'm thinking that it should be on both cylinders to equal things out or I'm not sure that you need a flywheel at all.

Thanks for the thought.
Ray
 
I decided to make Model #2 and it is much smaller than Model #1.
All the parts are made just like the larger model just smaller which has changed the stroke now to 11/16" instead of 1".
The original pistons were turned down for the smaller bore. No flywheels this time either.

This is a video to show it does run but not as I would like.

I am going to call this project a small success and may continue exploring ways of improvement in the future.

Thanks for looking
Ray
 
I would say that runs great! Fantastic!
 
Bravo! It appears to run very well for a prototype. What don't you like about how it's preforming? what modifications do you think it might need?
 
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