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Subject: Re: [FlyRotary] Re: Leaking input shaft
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From: Tracy <rwstracy@gmail.com>
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Date: Sat, 8 Mar 2014 17:58:03 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Just FYI,  I have found that life of the input shaft seal is closely related=
 to oil temperature.   The hotter the oil temp, the sooner the seal gets har=
d and looses its elasticity and ability to seal.

Tracy

Sent from my iPad

> On Mar 8, 2014, at 15:17, Christamarmc <christamarmc@gmail.com> wrote:
>=20
> Hi Tracy
> Many thanks for the input, I have removed the seal and she was a bit hard f=
rom use, so a new one is being  installed and should fix it. Certainly love f=
lying behind the rotary.
>=20
> Cheers
> Christian
>=20
> Sent from my iPad
>=20
>> On 08/03/2014, at 10:39 PM, Tracy <rwstracy@gmail.com> wrote:
>>=20
>> Neil's advice was right on.   When installed, there should be virtually n=
o side play but there is nothing to restrain it when removed from the engine=
 other than the pilot bearing on the prop shaft and that alone would allow i=
t to wobble about quite a bit.  The clearance on that bearing is fairly larg=
e in order to flow enough cooling oil for the gears.  =20
>>=20
>> Tracy
>>=20
>> PS:  Congrats on getting 400 hours in your plane Christian, and to Bob on=
 that great article in Experimenter.  I always get a kick out of hearing tha=
t rotary powered planes are out there and flying.
>>=20
>> Sent from my iPad
>>=20
>>> On Mar 8, 2014, at 3:13, Christamarmc <christamarmc@gmail.com> wrote:
>>>=20
>>> Cheers Neil
>>> Just wondering how much play there should be, but seal is worn so will r=
eplace and see how it goes.
>>>=20
>>> Cheers
>>>=20
>>> Sent from my iPad
>>>=20
>>>> On 08/03/2014, at 5:49 PM, "Neil Unger" <neil.unger@bigpond.com> wrote:=

>>>>=20
>>>> Chris,
>>>>       That shaft is held true in the flywheel and in the planetries the=
 other end.  Once removed I suspect that the shaft would be "moveable" as yo=
u describe.  Suggest a new seal and see what happens.  hours is reasonable f=
or a simple 1 inch seal.  Neil.
>>>>=20
>>>> -----Original Message----- From: Christamarmc
>>>> Sent: Saturday, March 08, 2014 4:06 PM
>>>> To: Rotary motors in aircraft
>>>> Subject: [FlyRotary] Leaking input shaft
>>>>=20
>>>>=20
>>>> Hi all
>>>> Just wondering whether anyone can tell me what the play side to side sh=
ould be in the rd1c gearbox input shaft and what to expect from the oil seal=
, i can move the input shaft a little and see a visible gap on the input sea=
l once removed from the motor.Motor has done approx 400 hrs.
>>>> Just reinstalled the motor after some work and noticed oil dribbling fr=
om under the flywheel, thus why it was removed.
>>>>=20
>>>> Cheers
>>>> Christian
>>>> Sent from my iPad
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>=20
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