I found also part for FORD 9"dia and 3 to 1 ratio
 but
 much
 stronger

 Jean Prudhomme

 On second thought this is not such a bad idea.
 What do those parts weigh Jean?

 Do you know of a NC machine shop in Florida that can
 make
 housings for you?

 Also what is your budget for shafts and gear boxes?

 Paul Lamar



 I'm also interested in the 3 to 1 part number.
 Have not received reply from Tracy Cook on PSRU.
 May have to build my own, or be part of project.
 C. Smith

 Are you also going to use two engines in a pusher
 arrangement like this?

 BTW Jean your rotor housings are in.

 Paul Lamar


 Never mind.
 C. Smith


 I think you should try building something like this
 :)

 Paul

 It looks very interesting, but I wouldn't know where to start.
 C. Smith

Hi Paul

The main gear and pinon weigh 21 lbs and the spool 11 lbs , i can buy
the aluminum front housing from  www.nationaldrivetrain.com

pinion support al at $155.00

i have to choice of aluminum housing with 3-06 bore bearing at $475.00 or the 3.25 bore at $475.00

The full spool with35spl at $145.00 or the 40spl at $265.00

Gear and pinion at 3to1 ratio $165.00

They sell bearings but i need good advises about the one can stand 6000 to 7000 rpm
I want you Paul to make a look on those parts and the only part i need to
fabricate is the aluminum rear housing.

I know a few good machinist and i been graduate as technician machinist
beginning 60's but it been a long time , may be is a good time to buy a
maling machine and late for my project or get an experience one and let do the work

Do you have any suggestion about housing design???and prop shaft
arrangement with trust bearings

Jean Prudhomme

Those spool bearings are bullet proof so you can probably use them for
prop thrust bearings. 7000 RPM is no problem for take off.

Find a smaller ring and pinion in the 3:1 range.
What you have so far is too heavy.
Take a look at this outfit. http://www.arrowgear.com/

I would build a tig welded steel housing out of .049" with ribs. It will weigh
the same as a .150 aluminum housing but it won't expand so much
with heat and change the gear mesh.

A two inch or three inch diameter carbon fiber prop shaft is the way to
go. You want it stiff. Use a needle bearing on the outer end to cut
weight. Ross used prop shaft needle bearing for years with no problems.

Paul Lamar