From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] RD-1C input shaft oil seal
Date: Thu, 4 Mar 2021 15:51:19 +0800
References: <list-1275096@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-1275096@logan.com>
Message-Id: <090C8279-F514-4E8E-82F3-6F90A0663097@gmail.com>

Whats the downside to the drive filling with oil?
Pressurising the beast and its seals?
Is there more frictional losses and heat?

Steve Izett

> On 4 Mar 2021, at 2:35 pm, Sboese sboese@uwyo.edu =
<flyrotary@lancaironline.net> wrote:
>=20
> Finn,
>=20
> When I installed a vent in the top of my RD-1C drive it acted as an =
additional drain.  The drive operated completely filled with oil until =
the size of the original rear drain was increased to an ID of ~5/8=E2=80=9D=
 (1/2=E2=80=9D NPT pipe).
>=20
> Steve Boese=20
>=20
>=20
>=20
>> On Mar 3, 2021, at 5:46 PM, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>=20
>> =EF=BB=BF
>> =E2=97=86 This message was sent from a non-UWYO address. Please =
exercise caution when clicking links or opening attachments from =
external sources.
>>=20
>>=20
>> Dang! I just bought two of the National 350909 (single-lip) seals.
>>=20
>> I can see how I could add a retainer, but don't see enough space in =
the 1/2" plate for an o-ring.
>> I added a vent to my RWS RD-1C drive, so internal pressure should not =
be an issue (unless vent line gets clogged).
>>=20
>> Finn