From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] MISTRAL
Date: Tue, 16 Mar 2021 18:50:47 +0800
References: <list-1314307@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-1314307@logan.com>
Message-Id: <222B2C58-AB68-41BB-ABD2-0F159A3FEBE4@gmail.com>

Hi Kelly
Sounds really cool. Such a shame Mistral didn=E2=80=99t make it.
I thought their engines were side port. I=E2=80=99d love to know the =
length of the inlet from the engine face to the throttle body and the =
rpm that they rate the 200hp.

Cheers

Steve Izett
Glasair Super IIRG Renesis 4 port RD1C


> On 16 Mar 2021, at 9:59 am, Kelly Troyer keltro@gmail.com =
<flyrotary@lancaironline.net> wrote:
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> Lee,
>       I ask because I recently became the proud owner of the final =
iteration (Designed to be certified)  "Mistral G200-C1B" 200hp
> Rotary engine  and I am just curious as to what apex seals they used =
in them........Since "Mistral" seems to be out of business I
> do not know where to get information (I have heard that the Chinese =
bought them out)..............I do not need apex seals as the=20
> engine only has about 10 flying hours on it..............=20
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> Thanks,
> Kelly Troyer
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> On Mon, Mar 15, 2021 at 6:01 PM lehanover lehanover@aol.com =
<flyrotary@lancaironline.net> wrote:
> I did not. I was asked to travel about inspecting installations prior =
to first flight, or to assist with installations.
> But  if asked I would have suggested Ceramic  seals.=20
> =20
> We raced with Carbon seals and later, Ceramic seals. Carbons wear too =
fast for aircraft use but are soft and leave the housing chrome looking =
better than new as the years go by. No detectable wear at all. Near =
perfect sealing.  No skipping, no need for an extra spring.
> Same for Ceramics. Light weight. No wear. Very expensive. But if you =
can use the same housings for 4 or 5 years, then not so bad.  The duty =
cycle of an aircraft engine is much tougher than that of a racer or =
street engine. =20
> All early engines Had the wide carbon seals. We machined them down to =
fit the later rotors. So early housings would often run well over =
100,000 miles.  The iron seals with a chrome face have you running a =
chrome face against a chrome housing. Bad Mojo. With Premixing and or =
oil injection not so bad. Hard starting suggests=20
> worn apex seals.  Both ceramic and carbon seals need to be sized to =
the housing width.
> Any question, any time.=20
> Lynn E. Hanover=20
> =20
>  message dated 3/14/2021 11:29:17 PM Eastern Standard Time, =
flyrotary@lancaironline.net writes:
> =20
> Lee Hanover,
>     I seem to remember that you had some interaction back in the day =
with "MISTRAL" when they were developing their
> Rotary engines .........If so did you ever hear what tip seals they =
used in their engines ? (Iron , Ceramic , Etc)...........
> =20
> Thanks,
> --=20
> Kelly Troyer
>=20
>=20
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