From: " 12348ung@gmail.com" <flyrotary@lancaironline.net>
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	"'Peter Michelini'" <petermichelini@hotmail.com>
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Subject: RE: [FlyRotary] Ross Redrive Dimensions
Date: Mon, 19 Jul 2021 09:23:46 +1000
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Le roux,
                  First Lou Ross was an excellent machinist so =
tolerances are tight.  I suspect that the ring gear may be threaded and =
then loctited??  I am guessing in the dark without being unable to sight =
 "in person" Then in order to get bearings over the shaft, one of the =
ends must be able to be removed.  I can understand the oil holes to =
allow movement of oil for lubrication and possibly cooling.  So it =
appears that Lou assembled the bearings on the shaft and then the final =
assembly was the prop shaft to hold all together, hence the 3 pins.  Are =
thrust bearings behind the prop flange or in front of  the ring gear.  =
How did Lou allow for thrust both ways?
	Without a fixed ring gear the rotation will be less in RPM and counter =
clockwise. =20
You say Ford g/box bits available?  Can you tell me where, as to date no =
one in the US will answer emails let alone sell me bits?  What is the =
prop tip speed at 2900 rpm?  Seems high, so must be smaller dia than =
normal?    Nothing like a guess to be verified in practice.   My =
experience with P ports is that they do give a little extra HP, but not =
as much as Paul Lamar often quoted.  However just get flying and then =
fiddle, or you may never leave the ground -- we all fiddle too much and =
go by hearsay far too much.
Regards,  Neil. =20

-----Original Message-----
From: Rotary motors in aircraft <flyrotary@lancaironline.net>=20
Sent: Thursday, March 18, 2021 9:23 PM
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [FlyRotary] Ross Redrive Dimensions

=EF=BB=BFNeil: I got it wrong the propellor flange and ringgear flange =
is not the same.
Can=E2=80=99t figure it out ? how the ringgear side flange is stuck to =
the hollow shaft.Seems to me it has thread that screw in. Somehow it =
must be locked. I did not removed the pilot bearing as there is no need =
to do so as it is still brandnew never been used.
The propellor flange has 3 pins that holds it in place after the =
pressfit.
The hollow shafts needle bearings ,run over the oil holes in the shaft, =
and there is some holes between them too.


This psru is counter rotating and a 2,17 : 1 ratio.Therefor needs an =
anti - clockwise prop pilotside view. I am planning to put in just a 6 =
pinion planet steel casing planetary No other modifications to be =
done.There is a  6 pin planetary with 12 lug available to drop into the =
housing.
I believe with the 2  - 44 mm p ports @ 6500 rpm will have sufficient Hp =
for take off and climb turning the prop at 2900 rpm.
The at =E2=80=9Ctop of climb =E2=80=9C level out and cruise at 2300 prop =
rpm.