wrote: > Dave, > > Any firm conclusions for the apparent lack of lubrication getting to the > upper planets of your > RD1B re-drive during your Reno race heats ?...............I fully realize > you were putting a lot of > turbo boosted power (probably 250+ hp) through the drive.............Have > you had a chance to > inspect the re-drive that you borrowed for signs of overheat of the upper > planets ?.......... > > Several years ago when the "Ross" re-drives were the only ones available > for the Rotary I > remember reading of a similar problem with the 2.17 ratio..........The > theory was that because > the 2.17 planet is fixed with the ring gear rotating around it that > centrifugal force at high rpm > forced the lube from the ring gear and starved the upper > planets.............Theory at that time > was the 2.85 and 3.17 re-drives were largely immune to this problem > because the ring gear > of these drives is fixed and the planet rotates in an oil bath with this > same centrifugal force > slinging lube directly to the ring gear teeth more or less > equally.............FWIW > > Kelly Troyer > *"DYKE DELTA JD2" (Eventually)* > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold > "TURBONETICS"_TO4E50 Turbo > --001517473452acaf8904b001de76 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Kelly,

NOW you tell me. =A0:-)

Unfortunately, = I have not had time to even get to the bearings of the old drive, let alone= take apart the new one (which I don't really plan to do.

That theory does make sense. =A0There was clear evidence that th= e upper planets had overheated while the lower ones did not show heat damag= e. =A0That still does not really explain why the bearings=A0seized=A0as wel= l. =A0They still wont let the prop shaft turn in the housing, so I cant tur= n the access holes in the prop flange to access the=A0Allen=A0screws to rel= ease the retainer plate. =A0I'll let Tracy deal with that one.

Unfortunately, I have=A0opposite=A0engine offset and ve= rt-stab offset that really would not like it if I reversed the prop directi= on. Hmmm. =A0That is an interesting problem.. how to cool those upper plane= ts.

--=A0
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

On Sun, Oct 23, 2011 at 5:11 PM, Kelly Troyer <keltro@att.net> wrote:

Dave,

=A0

=A0=A0 Any firm conclusions=A0for the apparent lack of lubricati= on getting to the upper planets of your

RD1B re-drive during your Reno race he= ats ?...............I fully realize you were putting a lot of

turbo boosted=A0power (probably 250+ hp)=A0through the drive....= .........Have you had a chance to

inspect the=A0re-drive=A0 that you bor= rowed for signs of overheat of the upper planets ?..........

=A0

=A0 Several years ago when the "Ross" re-d= rives were the only ones available for the Rotary I

remember reading of a similar problem with the 2.17 ratio.......= ...The theory was that because

the 2.17 planet is fixed with the ring gear rotating around it t= hat centrifugal force at high rpm

forced the lube from the ring gear and starved the upper planets= .............Theory at that time

was the 2.85 and 3.17 re-drives were l= argely immune to this problem because the ring gear

of these drives is fixed and the planet rotates in an oil bath w= ith this same centrifugal force

slinging lube directly to the ring gear teeth more or less equal= ly.............FWIW

=A0

Kelly Troyer
"DYKE DELTA JD2&= quot; (Eventually)

"13B ROTARY"_ Engine
"RWS"_RD1C/EC= 2/EM2
"MISTRAL"_Backplate/Oil Manifold

"TURBONETICS"_TO4E50 Turbo

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