X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) From: "Kelly Troyer keltro@gmail.com" Received: from mail-lj1-f176.google.com ([209.85.208.176] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 1314315 for flyrotary@lancaironline.net; Mon, 15 Mar 2021 22:02:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.208.176; envelope-from=keltro@gmail.com Received: by mail-lj1-f176.google.com with SMTP id f16so18614170ljm.1 for ; Mon, 15 Mar 2021 19:02:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=cFmfS9olCwx5iDTQAJNE47pfRnR7osgI4KUFpnCTU7E=; b=KXt2W8J5+VAA2Q9nr3hNG7IZqFu5a11u+KiceCL2WB+jQmjpaPKGFTRIvVQA/FBeAC /RnUXrNzAgBS4fd5uTuq0ksjfk7d7gPpTzjYGtuTF9vJpYSas6QQdjli3LISRRDrcU0h Fk9aBVeexu319exoL8CisMpHOEgzLoQcPOjl/snitGzxCoEzl3louRyoWFY7WaG9RTxE JHPaFJN/aV5sj4HJ+0gY0zi0Y9gcYxeBfsviFmGDCbQMCR9BWi7dRXUBBPyhjMi9d6b7 y+QpQULrAvrNlxcoZMvpSPCsK8It+XqSFldqTSgvYTUtSOeGgYI6aVp8enGoyfdWtUHh iPzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=cFmfS9olCwx5iDTQAJNE47pfRnR7osgI4KUFpnCTU7E=; b=QyMe+bCoU+GZt2pIF4W08NnUG1fD+o2XgDdUoTaHkiQn06PJk3Zd7goDkH43hQcCAg xbGc7gn79E0j787pU5W2JMr6ntV1KJ+JuBy3HzX89lci+6tN5Ib5VM8Co3rJLlvrabsU wyK9RCXABq6P/5hKlrtSpciIbPeU3cBDnKRNTA9vfrRL1cTBCyZajBU8KbXPjwPw8ViG SfQjCM1YRZjzYReZp1ucixw5cjBW+BX9Wpi6xfejECSQfE9Hk1ZRjYQG0oBeOFcdD1Hr G6IeG2gJzf1SziIWup+OzrpbUjjVpy+3nbEwc7qLNlnvfxlXsnEASsSMZvksxdywDZXv wnag== X-Gm-Message-State: AOAM530vqtdjtw7yPbCScycg/Eoq6TWWKLHd1ghsKDmoDHBLTiSHNLbu sIyfm59ILe7PLMFSMDxZE1K4YYLIQblNnupLNUSbgLi2 X-Google-Smtp-Source: ABdhPJy2gK92Fz5SEkkVpeRUK09e8/5cg20kcb9QDpe+sBwP/P25254wRTovvFw0ofl56orvNvt1XCcJvwZyZm5h938= X-Received: by 2002:a2e:720c:: with SMTP id n12mr1131315ljc.67.1615860144899; Mon, 15 Mar 2021 19:02:24 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Mon, 15 Mar 2021 20:59:15 -0500 Message-ID: Subject: Re: [FlyRotary] Re: MISTRAL To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000f1895605bd9dc1c8" --000000000000f1895605bd9dc1c8 Content-Type: text/plain; charset="UTF-8" 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 engine only has about 10 flying hours on it.............. Thanks, Kelly Troyer 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. > > 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. > 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 > worn apex seals. Both ceramic and carbon seals need to be sized to the > housing width. > Any question, any time. > Lynn E. Hanover > > message dated 3/14/2021 11:29:17 PM Eastern Standard Time, > flyrotary@lancaironline.net writes: > > > 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)........... > > Thanks, > -- > Kelly Troyer > > > --000000000000f1895605bd9dc1c8 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Lee,
=C2=A0 =C2=A0 =C2=A0 I ask becau= se I recently became the proud owner of the final iteration (Designed to be= certified)=C2=A0 "Mistral G200-C1B" 200hp
Rotary engin= e=C2=A0 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 ou= t)..............I do not need apex seals as the=C2=A0
engine=C2= =A0only has about 10 flying hours on it..............=C2=A0

<= /div>
Thanks,
Kelly Troyer

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 installa= tions prior to first flight, or to assist with installations.
But=C2=A0=C2=A0if asked I would have su= ggested Ceramic=C2=A0 seals.=C2=A0
=C2=A0
We raced with Carbon seals and later, Ceramic seals. Carb= ons wear too fast for aircraft use but are soft and leave the housing chrom= e looking better than new as the years go by. No detectable wear at all. Ne= ar perfect sealing.=C2=A0 No skipping, no need for an extra spring.<= /div>
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.=C2= =A0 The duty cycle of an aircraft engine is much tougher than that of a rac= er or street engine.=C2=A0=C2=A0
All early engines Had the wide carbon seals. We machined t= hem down to fit the later rotors. So early housings would often run well ov= er 100,000 miles.=C2=A0 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=C2=A0
worn apex seals.=C2=A0 Both ceramic and carbon seals need = to be sized to the housing width.
Any question, any time.=C2=A0
Lynn E. Hanover=C2=A0
=C2=A0
=C2=A0me= ssage dated 3/14/2021 11:29:17 PM Eastern Standard Time, flyrotary@lancaironline.net<= /a> writes:
=C2=A0
Lee Hanover,
=C2=A0 =C2=A0 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 us= ed in their engines ? (Iron , Ceramic , Etc)...........
=C2=A0
Thanks,
--
Kelly Troyer





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