flyrotary@lancaironline.net Mailing List Archive

Stephen,

Sorry for the delay in getting back with you about the "Mistral" intake runner lengths , etc............Be aware these numbers are approximate but in the ballpark............The runner lengths are approx centerline

from the face of the 13B engine block to the throttle body..........Both the primary and secondary runners merge into a "V" shaped cast aluminum plenum which includes the throttle body.........The runner lengths

are to the interior side of the throttle body..........The runners from cast aluminum intake manifold to cast plenum are thin wall aluminum tubing..........I do not have access to the ID of these but have OD only.......

Primary Runner length approximately.........24 inches

Primary Runner "OD" approximately..........1.40 inches

Secondary Runner length approximately.....24 inches

Secondary Runner "OD" approximately.......1.66 inches

Throttle Body "ID" approximately..................2.85 inches

Hope this helps,

Kelly Troyer

On Tue, Mar 16, 2021 at 5:08 PM Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:

Thanks Kelly. If possible the ID of those runners as well please.

> On 16 Mar 2021, at 10:44 pm, Kelly Troyer keltro@gmail.com <flyrotary@lancaironline.net> wrote:
>
> Steve,
> Bear with me but as soon as practicable I will do my best to measure the intake length from engine face to face of the
> throttle body (plus ID of throttle body)............Yes the "Mistral" engines are side intake ports............I believe (from memory)
> that they rated HP at 6500 rpm...........Still waiting on all the "Mistral" documentation from the seller............
>
> Best,
> Kelly Troyer
>
> On Tue, Mar 16, 2021 at 5:51 AM Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
> Hi Kelly
> Sounds really cool. Such a shame Mistral didn’t make it.
> I thought their engines were side port. I’d 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:
> >
> > 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
>