From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: over square and detonation of a rotary for my
 pilot friend
Date: Sat, 18 Jul 2020 22:08:43 +0800
References: <list-542333@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-542333@logan.com>
Message-Id: <C510147D-D291-40E9-BC4F-A4D837E61CF9@gmail.com>

Thanks Bobby.
We are just NA, but the idea of a turbo and 250hp is appealing and would =
make the Glasair hum along at altitude!

Steve I

> On 18 Jul 2020, at 9:17 pm, Charlie England ceengland7@gmail.com =
<flyrotary@lancaironline.net> wrote:
>=20
> Hi Steve,
> Are you running a turbo? I didn't see it listed when you asked about =
oversquare, so I thought you were running NA.
>=20
> Sent from BlueMail
> On Jul 18, 2020, at 7:34 AM, "Bobby J. Hughes bhughes@qnsi.net" =
<flyrotary@lancaironline.net> wrote:
> Steve,
>=20
> I used 6800-7000 rpm, 36-38=E2=80=9D MP with F/A in the 12=E2=80=99s =
for takeoff.  Around pattern altitude I would reduce to 6000 rpm and =
30-32=E2=80=9D MP with F/A a little richer than best power in the =
13=E2=80=99s. I monitored EGT=E2=80=99s during all phases of flight and =
would make mixture changes as needed to keep EGT around 1600 or less =
during high power operations. I used a vernier cable to control the =
super charger bypass and could dial in the desired MP. For the turbo I =
was planning a 4# waste gate with an air control valve to apply more =
pressure to the top of spring at higher altitudes or lower rpm. Still =
using the same target numbers as with the super charger. But no turbo =
for the S21 project. I guess I need to sell it at some point.=20
>=20
> So I only used boost for takeoff and for normalization most of the =
time. I liked operating  28- 30=E2=80=9D with the prop between 1700-2000 =
rpm. Rich or lean to keep the EGT under 1600F and intake temps under =
140F.=20
>=20
> Bobby
>=20
> Sent from my iPad
>=20
>> On Jul 17, 2020, at 9:53 PM, Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
>>=20
>> =EF=BB=BFThanks Bobby.
>> What boost are you running?
>>=20
>> And I meant to ask, my friend is asking what power setting we =
consider the engine to be OK with for continual operation?
>>=20
>> Steve Izett
>>=20
>> > On 18 Jul 2020, at 9:59 am, Bobby J. Hughes bhughes@qnsi.net =
<flyrotary@lancaironline.net> wrote:
>> >=20
>> > My preferred cruise economy settings 30=E2=80=9D MP, 4800-5200 rpm. =
F/A 15:8 lean. Or 30-34=E2=80=9D MP, 5200-5400 rpm F/A 14:0 or whatever =
was need to keep EGT below 1600F and intake air temp below 140F.=20
>> >=20
>> > Bobby
>> >=20
>> > From: Rotary motors in aircraft =
[mailto:flyrotary@lancaironline.net]=20
>> > Sent: Friday, July 17, 2020 7:10 PM
>> > To: Rotary motors in aircraft
>> > Subject: [FlyRotary] over square and detonation of a rotary for my =
pilot friend
>> >=20
>> > Hi people.
>> >=20
>> > My test pilot friend and I are continuing our journey of extending =
the phase#1 envelope and now experimenting with engine settings.
>> > With a flight adjustable prop he is asking questions about 'over =
square' and detonation.=20
>> > Can anyone give me an answer for him?
>> >=20
>> > Thanks
>> >=20
>> > Steve Izett
>> > Glasaie Super IIRG Renesis 4 port RD1C variable pitch prop.
>> >=20
>> >=20
>> >=20
>> >=20
>> >=20
>> > --
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