Paul Carey wrote:

Hi Paul

Thought you might like to see pics of my drag racing engine, after an
overhaul and modifications.
We put Tracey's apel seals in there - so this should be a good test for
them!

The sump plate is to be welded to a structural box sump - to stop the three
rotor twisting on launch
and high boost. And yes - that is a Piper Chieftain dual magneto. The engine
has run before, and
on alcohol, sounds like a Top Fuel dragster.

I enjoy your posts guys.

Regards

Paul Carey LAME, MC
Aero Management - aviation consultants.
www.aeromanagement.com.au
(08) 9371 5205  0418 959 892

Really interesting looking engine. Got a torque curve for us?

What is the evidence that the motor is twisting on launch Paul?
A lot of guys install a bunch of hollow dowel pins around the tension bolts
which would have the same effect. The two that are in every engine
between each housing should do the job. Come to think about it... perhaps 
the end housings are cracking around the stock dowel pins on high power 
engines as I recall.

The magneto drive looks expensive. I would think triggering a bunch
of MSD ignitions off the e-shaft or flywheel would be less costly, weigh less and 
might work much better than an aircraft mag. What is happening in the
states is most of the experimental aircraft guys are switching to solid 
state ignition systems. My next door hangar neighbor Klause of LSE is 
making most of them.


Paul Lamar
 
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