Hello

I am now the owner of this rotary engine that was made by Yaw power. It is
installed in my newly acquired Merlin GT. The aircraft has never been flown
and
the engine has 0 hours on it. To make a long story short I have limited
knowledge on rotary and I need all the help I can get.

Thanks

Ron Anderson


I added you to the list Ron so ask any question you wish no matter
how dumb you might think it is. There are no dumb questions
on here.

BTW Since the Merlin GT is an ultra light I assume the engine
you bought from Paul Yaw was a one rotor. Even the one rotor
Mazda engine is a bit heavy for this airplane.
-- 
Paul Lamar ...No rotor no motor.

I agree and I may have to replace it, but it came mounted in the plane so

I think I'm going to try it first. Other Merlins at Blue yonder Aviation are
flying with  O 200s, I think they are about 200lbs. And yes it is a one rotor
engine and I have no idea how much it weighs, and it is the same engine that is
in the picture. Paul paints his engines blue and the red was a one of special
request.

1st question (all my questions will be dumb. sorry)

What type of electronic fuel pump would you recommend and how much fuel
pressure is required for a one rotor

2. Any special way to plumb the engine to avoid excessive heat?
3. Any special type of exhaust system needed?
4. what would be normal temps and oil pressure readings?

Thank you for repleying

Ron Anderson

1. I like the MSD or Carter rotary vane fuel pumps.
Not Walbro.

2. Yes of course. The rad and oil cooler ducting and sizes of rad and
oil cooler must be correct. This adds weight of course.
You will need a rad of about 300 cubic inches and an oil cooler
around 120 cubic inches. The larger the frontal area the better.
In other words 20" by 20" by 1" thick is better than 10" by 10" by 4"
thick. Get my cooling book from AC Spruce.

3. Exhaust design is not important but use .065" wall 321 SS on the first
third or half of the exhaust. Do Not use mild steel.

4. Try to keep the water and oil below 200 F. 220 F water and oil is OK
for awhile but not recommended.