X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=PbaBeRpd c=1 sm=1 tr=0 a=V3SKbpRzU9DxzSgA2GKAQg==:117 a=x7bEGLp0ZPQA:10 a=ad1WmcueCrwA:10 a=_RQrkK6FrEwA:10 a=UKPAHat8AAAA:8 a=Ia-xEzejAAAA:8 a=pGLkceISAAAA:8 a=7g1VtSJxAAAA:8 a=jThZ7_-JAAAA:8 a=I9TN_B0HY-jpCsMExAsA:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=v06Ifo8dsW9splci5hIA:9 a=ExKQC1LjIODQWG8O:21 a=Fc6xXSS-RxGHxrvp76Qp:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 a=NVbvhy2gKIdozzgvQOKv:22 From: "William Jepson wrjjrs@gmail.com" Received: from mail-lf1-f43.google.com ([209.85.167.43] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 544987 for flyrotary@lancaironline.net; Sun, 19 Jul 2020 14:49:38 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.167.43; envelope-from=wrjjrs@gmail.com Received: by mail-lf1-f43.google.com with SMTP id g2so8597123lfb.0 for ; Sun, 19 Jul 2020 11:49:39 -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=AQ701UWxJdaywHrBsaNr0Vq7qs/uxD1H/mkc9tCc7WA=; b=gLhbjdJkLgb9ReBYGOVGKgfoVjdjVZ8Y3ezV6at1j/60B9pMCBAPwDH88PtuQ/fabq FyigFkQD4oJTraRFBhki6BRmXafXA9aO5IFGrI/M/mgUl3QUF3dW5ocZOYlbR4s4m6v2 uI7VNSahk/8SeEAnQiMNJdmxkS2Ah5KtaTkg5ckOlerEGBtQaVoFYxvB9vIGqdr9CfPm V06AnaiShT3gVYwsn8/b2sC+xrdVnBYznp1XejonQjEHZjS98lLkk6XDV51KNci9WIlS PKyxGeCbVHMOxxhm2NmBnM2SNC5UM6NEXlhmrBl3upIAtWsG1JhmWrOFJe5aqd6yXFUG joRQ== 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=AQ701UWxJdaywHrBsaNr0Vq7qs/uxD1H/mkc9tCc7WA=; b=L6GxuolmE9hr1t30pWfk0lng2351XOnGB7qcyw/pWP5SXfvH3bS4UNrjhBNwg7v1UD kl5KPH5YouIjrB6AE/WYFRkt3sz2wJU675bc2bw041XcyudA/juMHFQp7Mr/JJ2Vb36f 9x8vGlmHLkUSM3JOH/EWSrUW8FJ3Qk0pmu5Cg6bsfy764iz6FWjRzwAWc8L39osc9oZ1 r91kJcWIcmWuMnlpPsn5Yb15tD237EyFnmG4pbU9fHlYAUbX8mGs3aXPhRWR+2IpLUwM b6Qq5N9IEUbbOVEko4aZ8WvAAD7kPh4rwRZmvXvQ4Mo6/ACW9sSZ4krGsB08qaIlQh8o 5x+w== X-Gm-Message-State: AOAM532BKd6qJpBTBW0Mc1S2qauPFbeqmu/ReNMtjp2TueU0tEaK+PC1 o8aVK8UElujYrd+FgEOp/ToLXvOOAcNu72auLq3eVg== X-Google-Smtp-Source: ABdhPJxgCk731Hc6w87uvLXjM8rVarsH8J8CazvplssMdvn/iBvriYM3wRID/QLdp1XO8iqF6r4Bs9luc+Z1Z+7zLUs= X-Received: by 2002:ac2:4294:: with SMTP id m20mr5498371lfh.147.1595184560368; Sun, 19 Jul 2020 11:49:20 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Sun, 19 Jul 2020 11:49:09 -0700 Message-ID: Subject: Re: [FlyRotary] Re: over square and detonation of a rotary for my pilot friend To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000126e0305aacfd98b" --000000000000126e0305aacfd98b Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Bobby, Sounds like you are right in the ballpark with fuel/air ratio. You=E2=80=99= re supercharged but running conventional side plate intakes correct? All the Powersport engines were p-port which really does help power. 14:7 really SHOULD produce the highest egt. We were seeing 1600 regularly or a bit more. Running best power on the p-ports frequently produced 1650 or more. This didn=E2=80=99t cause any problems except shielding the exhaust was nee= ded when running the engine in the conventional orientation. (NOT plugs up) Bill On Sun, Jul 19, 2020 at 7:37 AM Bobby J. Hughes bhughes@qnsi.net < flyrotary@lancaironline.net> wrote: > Bill, > I=E2=80=9Dm not exactly sure what F/A ratio made peak EGT but was close t= o 14:7. > Best power was about 13:4 to 13:6. Best power produced lower EGT than > operating at 14:7 but would not keep EGT under my 1600F target above 6000 > rpm. Mixtures leaner than 15:8 seemed to slow airspeed more than fuel bur= n. > I would see EGT of 1550-1575F at this mixture. This is around 30=E2=80=9D= MP. Lower > MP would lower EGT. Bypassing the super charger at altitude would produc= e > EGT in the 1480-1500 range. But at a considerable speed reduction. > > The turbo swap never happened. To many years of working away from home an= d > the hanger is an hour each way. The Rans S21 caught my eye and I was read= y > for a smaller airplane. I wanted a plane that would allow me to remove t= he > doors and cruise around at low speed and still be used for x-country. The > S21 stalls at 40 mph and cruise at 154 mph true with the Titan 180 hp > engine. The renesis should be similar. > > Bobby > > Sent from my iPad > > On Jul 18, 2020, at 2:57 PM, William Jepson wrjjrs@gmail.com < > flyrotary@lancaironline.net> wrote: > > =EF=BB=BF > > > Hi Bobby, > I understand you have considerable time with your engine. I'm surprised > at the A/F ratio. I'm passing along the info I have received from the > original Powersport guys. Of course you are supercharged right? Or did > you convert to turbo? The Powersport (original) guys were always NA. > Steve told me that rich of peak was just rich of stoichiometric at about > 13:1. Lean of peak could go to 16:1 or more. It of course isn't an > apples to apples comparison with the engine supercharged. Just an FYI > comment. With the intake air heated it would certainly skew the reading. > Bill > > On Sat, Jul 18, 2020 at 4:57 AM Bobby J. Hughes bhughes@qnsi.net < > flyrotary@lancaironline.net> wrote: > >> Bill, >> >> These setting worked best for me. I did my 8-10 hour days between Texas= , >> Delaware, Ohio, etc with a lot of time to experiment. Of course takeoff >> F/A was in the 12=E2=80=99s and water injection at 38-40=E2=80=9D MP un= less it was really >> cold. No heat exchanger for the super charger. EGT under 1600F and >> intake temp under 140F were my targets. 93 octane usually with alcohol o= r >> 100LL. >> >> >> Bobby >> >> Sent from my iPad >> >> On Jul 17, 2020, at 9:05 PM, William Jepson wrjjrs@gmail.com < >> flyrotary@lancaironline.net> wrote: >> >> =EF=BB=BF >> Bobby, unless you have too much timing lead or exceptionally crappy gas >> it is unusual to detonate. That air/fuel ratio is rather bad place. Lean >> more or run rich of peak. >> Bill >> >> On Fri, Jul 17, 2020 at 7:00 PM Bobby J. Hughes bhughes@qnsi.net < >> flyrotary@lancaironline.net> wrote: >> >>> 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. >>> >>> >>> >>> Bobby >>> >>> >>> >>> *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] >>> *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 >>> >>> >>> >>> Hi people. >>> >>> 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. >>> Can anyone give me an answer for him? >>> >>> Thanks >>> >>> Steve Izett >>> Glasaie Super IIRG Renesis 4 port RD1C variable pitch prop. >>> >>> >>> >>> >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: >>> http://mail.lancaironline.net:81/lists/flyrotary/List.html >>> >>> >>> *Disclaimer* >>> >>> The information contained in this communication from the sender is >>> confidential. It is intended solely for use by the recipient and others >>> authorized to receive it. If you are not the recipient, you are hereby >>> notified that any disclosure, copying, distribution or taking action in >>> relation of the contents of this information is strictly prohibited and= may >>> be unlawful. >>> >>> This email has been scanned for viruses and malware, and may have been >>> automatically archived by *Mimecast Ltd*, an innovator in Software as a >>> Service (SaaS) for business. Providing a *safer* and *more useful* >>> place for your human generated data. Specializing in; Security, archivi= ng >>> and compliance. To find out more Click Here >>> . >>> >> --000000000000126e0305aacfd98b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Bobby,
Sounds like you = are right in the ballpark with fuel/air ratio. You=E2=80=99re supercharged = but running conventional side plate intakes correct? All the Powersport eng= ines were p-port which really does help power. 14:7 really SHOULD produce t= he highest egt.=C2=A0 We were seeing 1600 regularly or a bit more. Running = best power on the p-ports frequently produced 1650 or more. This didn=E2=80= =99t cause any problems except shielding the exhaust was needed when runnin= g the engine in the conventional orientation. (NOT plugs up)
Bill

On Sun, Jul 19, 2020 at 7:37 AM Bobby J. Hughes bhughes@qnsi.net <flyrotary@lancaironline.net> wrote:
Bill,<= div>I=E2=80=9Dm not exactly sure what F/A ratio made peak EGT but was close= to 14:7. Best power was about 13:4 to 13:6. Best power produced lower EGT = than operating at 14:7 but would not keep EGT under my 1600F target above 6= 000 rpm. Mixtures leaner than 15:8 seemed to slow airspeed more than fuel b= urn. I would see EGT of 1550-1575F at this mixture. This is around 30=E2=80= =9D MP. Lower MP would lower EGT.=C2=A0 Bypassing the super charger at alti= tude would produce EGT in the 1480-1500 range. But at a considerable speed = reduction.=C2=A0

The turbo swap never happened. To= many years of working away from home and the hanger is an hour each way. T= he Rans S21 caught my eye and I was ready for a smaller airplane.=C2=A0 I w= anted a plane that would allow me to remove the doors and cruise around at = low speed and still be used for x-country. The S21 stalls at 40 mph and cru= ise at 154 mph true with the Titan 180 hp engine. The renesis should be sim= ilar.=C2=A0

Bobby

Sent from my iPad

O= n Jul 18, 2020, at 2:57 PM, William Jepson wrjjrs@gmail.com <flyrotary@lancaironline.net> wr= ote:

= =EF=BB=BF

Hi Bobby,
I understand you have=C2=A0considerab= le time with your engine. I'm surprised=C2=A0 at the A/F ratio. I'm= passing along the info I have received from the original Powersport guys. Of course you are superchar= ged right? Or did you convert to turbo? The Powersport (original) guys were always NA. Steve told me t= hat rich of peak was just=C2=A0rich of=C2=A0stoichiometric=C2=A0at about 13:1. Le= an of peak could go to 16:1 or more. It of course isn't=C2=A0an apples= =C2=A0to apples comparison with the engine supercharged. Just an FYI commen= t. With the intake air heated it would certainly skew the reading.=C2=A0
Bill

On Sat, Jul 18, 2020 at 4:57 AM Bobby J. Hughes bhughes@qnsi.net <<= a href=3D"mailto:flyrotary@lancaironline.net" target=3D"_blank">flyrotary@l= ancaironline.net> wrote:
Bill,

These setting wo= rked best for me.=C2=A0 I did my 8-10 hour days between Texas, Delaware, Oh= io, etc with a lot of time to experiment. Of course takeoff =C2=A0F/A was i= n the 12=E2=80=99s and water injection at 38-40=E2=80=9D MP unless it was r= eally cold.=C2=A0 No heat exchanger for the super charger.=C2=A0 EGT =C2=A0= under 1600F and intake temp under 140F were my targets. 93 octane usually w= ith alcohol or 100LL.=C2=A0


Bobby= =C2=A0

Sent from my iPad

On Jul 17, 2020, at 9:05 PM, William= Jepson wrjjrs@gmail.= com <flyrotary@lancaironline.net> wrote:

=EF=BB=BF
Bobb= y, unless you have too much timing lead or exceptionally crappy gas it is u= nusual to detonate. That air/fuel ratio is rather bad place. Lean more or r= un rich of peak.
Bill

On Fri, Jul 17, 2020= at 7:00 PM Bobby J. Hughes bhughes@qnsi.net <flyrotary@lancaironline.net> wrote:
<= blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l= eft:1px solid rgb(204,204,204);padding-left:1ex">
<= p class=3D"MsoNormal">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 be= low 140F.

= =C2=A0

Bobby<= /span>

=C2=A0

From: Rotary= motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Friday,= July 17, 2020 7:10 PM
To: Rotary motors in aircraft
Subjec= t: [FlyRotary] over square and detonation of a rotary for my pilot frie= nd

=C2=A0=

Hi people.

My test pilot friend an= d I are continuing our journey of extending the phase#1 envelope and now ex= perimenting with engine settings.
With a flight adjustable prop he is as= king questions about 'over square' and detonation.
Can anyone g= ive me an answer for him?

Thanks

Steve Izett
Glasaie Super= IIRG Renesis 4 port RD1C variable pitch prop.





--Homepage: http://ww= w.flyrotary.com/
Archive and UnSub: http://mail.lancai= ronline.net:81/lists/flyrotary/List.html



Disclaimer

The information contained in this communication from th= e sender is confidential. It is intended solely for use by the recipient an= d others authorized to receive it. If you are not the recipient, you are he= reby notified that any disclosure, copying, distribution or taking action i= n relation of the contents of this information is strictly prohibited and m= ay be unlawful.

This email has been scanned for viruses and malware,= and may have been automatically archived by Mimecast Ltd, an innova= tor in Software as a Service (SaaS) for business. Providing a safer= and more useful place for your human generated data. Specializing = in; Security, archiving and compliance. To find out more Click Here.

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