> >>>Jerry M Williams wrote:

 >>>
 >>>
 >>>> Hi all,
 >>>>
 >>>> I was told there are a couple of OMC engineers that look at
the site from
 >>>> time to time. Well, here goes. I bought a 1973 OMC RC-35-Q
Rotary engine
 >>>> to go into my Hummelbird. It is 35 hp, air cooled, takes two cycle oil,
 >>>> has 1250 miles and is in really fine condition. There is light carbon
 >>>> build up on the rotor and surface dirt. It was running a year ago when
 >>>> the guy I bought it from started it when he bought the
Evinrude snowmobil
 >>>> he bought with it in it. looking down the carb it looks brand new aand
 >>>> the needle valve is not even worn. the starter gear/flywheel have seen
 >>>> very little usage. With the starter and cooling fans still
on, she weighs
 >>>> a hefty 71 lbs. In it's day, it was a true gem of an engine. I think it
 >>>> still is , and wish more than 17000 were built-mine is 11578.
 >>>>
 >>>>
 >>>> I guess what I need is a little help. I am an A&P, but that helps me
 >>>> little here, and besides, I never even seen a rotary taken apart except
 >>>> in pictures. I do have more than average mechanical Know-how. As a
 >>>> proffession, I am an Avionics tech in the Navy. The only
picture I saw of
 >>>> this engine before it showed up is of a cut model of its 45 hp brother.
 >>>>
 >>>>
 >>>> These engines came in Evinrude and Johnson sleds in I think
1972-1974 or
 >>>> 5. Are there any ideas on a PSRU out there? I have no way right now of
 >>>> accessing a machine shop. I may be able to find a hook-up on
base, but I
 >>>> will need to give the operator as good drawing. I would rather just
 >>>> direct drive this engine. I would have to do it on the fan end of the
 >>>> shaft I think to turn the prop right. On the other end of the eccentric
 >>>> is about a 5 inch long splined shaft. I kno the thrust
bearing is on the
 >>>> fan side and I am bout to pull the housing apart in my auto hobby shop
 >>>> and examine it. I have the factory EVINRUDE manual and it describes in
 >>>> detail and gives tips and steps on anything about this
engine. The plane
 >>>> takes a 46 X 34 prop on the 1/2 vW it was designed for, which turns out
 >>>> to be about 2/3 the price of 6k for this wonderful little airplane. Any
 >>>> advice is truly appreciated.
 >>>> Thanks,
 >>>> Jerry

 >>   Hi Jerry
 >>  If you want to build a cog belt redrive I can make custom pulleys.
 >>  Check out my web site and you can see some of the pulleys that
I have made.
 >>
 >>  Ken Welter
 >>  http://homepage.mac.com/rotarycoot/

 Ken, do you have prices on the different sizes
 Namely a 3.11 ratio, and a  2.95.
 Thanks
 Royce

   The 2.95 and the 3.11 use a 118 tooth upper pulley made from
aluminum and the price on it is $900
   The 3.11 uses a 38 tooth lower and the 2,95 uses a 40 tooth and
they are made from 1045 steel and the cost is $400 for the lower ones.
  For a lower horse power engine the pulleys could be much smaller in
both diameter and width cutting the cost way down as the 60 pound
chunk of aluminum that I make that 10 pound upper pulley from costs
me $350 and you wouldn't believe what 50 pounds of shavings looks
like.
   Ken Welter

 
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