Gerry White wrote:

 Has any one done a fuel burn comparison between the Mazda 13B and a Lycoming
O-320 or O-360 in the same or similar aircraft?

Gerry White

Tracy claims they are the same when flown side by side.
That was before he started running it 100 degrees F LEAN of
peak EGT.

Of course most people run their Lyc's and Cont's 50 to 100 degrees
rich of peak so you don't burn those $250 sodium cooled 
exhaust valves.  I average 500 hours per $90 SS exhaust valve
in my Cont. O-470. Actually the total cost is more like $1000 per 500
hours because once you take the cylinder off and pay the FAA certified 
mechanic you might as well overhaul it.

I forget and fail to adjust the mixture from time to time.
I am sure it goes lean on me when that happens.

It takes a lot of extra fuel to make up the difference.

Least you think the exhaust valve is running at EGT think again.
It runs way hotter.
 
Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org