Greetings from this side of the pond.
One thing about being in Colorado is that we do not get hit by hurricanes!
I hope that those mayhemers located down in the islands are safe from Irene.
Now to business -
I built a D10 last year, and then this year I have been adding the reversing gear.
I read very carefully the thread from George, and used his flat linkage setup.
It worked out pretty well.
I have still to finish up the linkage, since it will be going in a boat, I may not use the
handle provided, instead I will be making up my own.
I have attached a picture.
The issue I am having is that I think I am getting "blow-by"
First, I followed the plans and put the three oil grooves on the pistons rather than a
ring. I did not have any rings to use. I am using air for the moment, and
only running for less than a minute. I squirted in some oil, and I see a little
dripping from the exhaust, so I think I should have adequate lubrication.
But I get a steady stream of air out the exhaust, on very low pressure,
once the engine starts, the stream continues but also puffs like I would
normally expect.
So - I started looking at o-rings, and I am curious about what size
I should get. I need to reverse engineer as the pistons and cylinders are
already done.
I have found a good source I think - not the local DYI store but instead:
http://www.theoringstore.com/index.php?main_page=index Also what type is favored? PTFE? Silicone? other?
What size cross-section? 1/16", 1/8"
All advice is appreciated.
Thanks,
Jim Pope
Denver, Colorado