3 radial cylinders

[gg89220]

hello

Is your radius turningmashine homemade ?

it is a device to cut spokes in a grinding wheel, I replaced the diamond with a lathe tool.
provisional motor assembly

 

[gg89220]

hello
intake cam

 

[gg89220]

hello
the engine finished

 

[gg89220]

hello
here is the video

 

[awake]

Very nice - love the way it responds to the throttle, and the overall sound!

Are you running this on an oil/gas mix?

 

[propclock]

Great , runs superb. !!
I didn't see the source of the plans?

 

[johnmcc69]

Beautiful! Runs very well!

John

 

[propclock]

Plans?

 

[gg89220]

hello
plans Baupläne Modellmotore - Online-Shop der Fa. CAD+Modelltechnik Jung

Are you running this on an oil/gas mix?

2% petrol / oil mixture + a little oil in the crankcase

 

[Peter Twissell]

Very nice runner. Well done that man!

 

[Steamchick]

Congratulations on a top-class model. Can you make one about 500ccs displacement? - May be more fun than my Guzzi-V50!

 

[propclock]

Thank you for the plans link. You put the plans picture many times in your posts.
Sorry my laziness. After looking at all your wonderful posts today , again,
are the valves made from screws? Were the stems good enough? or did you
cut the seat and then cut/polish the stem? or just the opposite? take a screw
finish the stem and then cut the head? You must have wonderful German screws
available. Thanks,
The proof is in the running, that is a wonderful running engine.

 

[Richard Hed]

hello
here is the video

There are three cylinder motors all over asia running all sorts of things. they are barely larger than your beautiful motor but they are not radials. Goo Work!

 

[ddmckee54]

I've got a question about your valves. I see that you are making the valves out of a countersunk phillips' head screw. That's a neat idea, but I'm wondering if that could lead to potential hot spots on the valves? Is this the first time you've used this type of screw for a valve, or is something you know won't cause problems? I realize that the vast majority of model engines don't exactly see what you'd call "HARD" use, so a hot spot would probably never be a problem.

Don

 

[gg89220]

I have already built several motors with this process, to run a few minutes at each session there is no problem