Martin Morgan wrote:

Well I've talked about it before and even mailed Tracy off list. But it is
finally going to happen. After this coming weekends jolly flight and
beat-up, I'm going to pull my Pitts apart.

I will have to rebuild 51% (or rather, build 51% of a new Pitts and use 49%
of my existing one) to qualify for experimental, so this will still take a
while.

I intend to use a N/A 13B with a bit of porting.My current Lyco should be
putting out something over 200hp and I don't want any less than that! (more
IS better). I'm hoping that Tracy will have the higher ratio box out soon
that he mentioned working on a while back (any chance Tracy?).

My main concerns are the gyroscopic loads. Tracy believes that his Gearbox
can handle Advanced levels aeros if the output shaft is replaced as part of
seasonal maintenance. But what about the gearbox mount and engine mount?
(and the rotors themselves for that matter, I'll use the lighter late model
ones to help with this)

For those Australians on the list that sent me their email addresses, Thank
You! BUT I managed to lose all of them along with some thousands of list
mails in a lesson on Linux email servers (what's a backup?). Please do mail
me off list and I'll try not to be so stupid in future...

Regards to All

Martin Morgan
Pitts S-1S
martin@i-byte.com.au

You will probably need peripheral ports to insure that you have over 200 HP.
We will be testing Tracy's 2.17:1 gear box and the rotors in my engine 
for gyroscopic loads with carbon blades when I get back from your 
country. I assume you will use a composite prop.

It will be an inevitable outgrowth our test on the LAEV 
prop hub. We plan to nod the prop dyno at a 60 degree per second rate 
constantly while running the engine at 6000 RPM WOT. This is how
Butch described the test: 

"That's one hell of a SCARY big 240 HP Fan to just turn loose 
while developing 360 deg gargantuan gyroscopic forces." 

It should be a rather exciting experience. We are thinking of charging 
admission to view the tests :-)

Paul Lamar
 
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