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Sideshaft Hit-Miss
Dave G:
Thank you Rob, the rocker arm has a horizontal ledge milled into it just above the roller follower pin in the back. In the third pic you can see an L shaped piece just to the rear of cam that pivots on a pin that has a head like a rivet which you can also see. The bottom edge of the L shaped piece is cut into a wedge and traps the horizontal ledge in the rocker arm and holds the exhaust valve open. The rear part of the L shaped piece is connected to a couple of links that are raised or lowered as the flyballs move the spindle up or down. The speed is regulated by the 4 star shaped piece made of brass. In the second pic you can see the spring that is attached to the piece of brass and then the other end is connected to the L shaped piece. The L shaped piece only moves about .030" to trap the rocker arm. This was the hardest part of building this engine and I have many hours of time thinking about how to do it and keep it simple. All the pivots and links are on a double shear to give the components better support and life. The engine has many hours on it and seems to run better everytime I let it run. Dave
Brass_Machine:
Nice work. :thumbup: The pictures are very clear too!
Eric
cfellows:
Very nice, Dave. Couldn't see it but I assume the spark plug is on he back of the valve block? Got a video lurking around somewhere?
Chuck
spuddevans:
That is a beautiful engine, I too would love to see a vid of it working if you have one.
Tim
sbwhart:
Very Very Nice David
:clap: :clap: :clap: :clap: :clap:
I've got a fasination for hit and miss engines.
Would it be posible for you to post a Video of it running
Stew
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