X-Virus-Scanned: clean according to Sophos on Logan.com From: "David Leonard" Received: from mail-qt0-f173.google.com ([209.85.216.173] verified) by logan.com (CommuniGate Pro SMTP 6.1.11) with ESMTPS id 8873228 for flyrotary@lancaironline.net; Sat, 13 Aug 2016 13:16:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.216.173; envelope-from=wdleonard@gmail.com Received: by mail-qt0-f173.google.com with SMTP id u25so6563515qtb.1 for ; Sat, 13 Aug 2016 10:16:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=Qq1fUnV8MTbRuZXWA3+UUlKlsiuceSa+vplOZmtAYjU=; b=DwhpLQqCCfW9/qSaZ9XnZcWlTYeAmQ6e0s5EDtpgpodMGk38nzQLDTH5c2eH+yX7Zn E1us4iq9uuVmWkHVpjtWtQM0LcEWIoceDGrCTDKUkCZryb8QIQNGNT/r7vErZwugVAk/ bV9pH+JSQV9BN8WFtuedX8reJ2fS70WqXHfoXSiyiwu+sXq7kEzOl7fHAV8RKq+tKAzS Eb4octP8S1kpk1ydjZmm3rvJDwLnvCzRbQ6i6Gkx3EACDQqXzW3YTWTWysd/hcnMYWiH mOZpDwFayHuIcctdqf0u/x0mvSKDa578Yo+V0P58/B0ZzDfMuCKgxY2YPgRioYiNgSSv yQMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=Qq1fUnV8MTbRuZXWA3+UUlKlsiuceSa+vplOZmtAYjU=; b=MJ2OGWwMbeBWeTBHRXW2S3vvh2AeIlkf8Lv4eHPj726opeo5TKReDqd0ZUs4CmxJep MqT6IOzPQ7IfhXdWBjMz3DJYUV72oZVcNaNNTnCz8XMVz3Cv8FPCr1j8VqGL4PBF5s3s hQh5aQMJ38xQAlU3sdLXo55lban4t+0ly/LToqxadYr+QG/t6kXrhwko8Pu4i+1BDx0p dcjG7GCDa3YQCW+fi3E1N0edQ4M3vJ1xUQqpvrqZkIBvXtZgf8zmLAkYlidWLLDEU6LO iRje+95h94FIzKsT9A3w1epkJRsjge2ZQcLeV/emGVXnHjDzZYFM926g+iNbRXrafnvE 1E9g== X-Gm-Message-State: AEkoouvUpf+hyRZqW/zkcnSl/bqjsCsLkqUpdmD7s9VvivC5t0Vcrcy0kMq8qK5UZOhC4OYDw1ydarPB1vU7rw== X-Received: by 10.237.59.161 with SMTP id r30mr24040957qte.22.1471108558559; Sat, 13 Aug 2016 10:15:58 -0700 (PDT) MIME-Version: 1.0 Received: by 10.55.113.134 with HTTP; Sat, 13 Aug 2016 10:15:58 -0700 (PDT) In-Reply-To: References: Date: Sat, 13 Aug 2016 10:15:58 -0700 Message-ID: Subject: Re: [FlyRotary] Re: He said again...... To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=94eb2c1922a60f21580539f727ed --94eb2c1922a60f21580539f727ed Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I should add that my coolant and oil run very cool, around 150 most of the time. If yours are running near the high end of the temp range maybe listen to Lynn... Dave Leonard On Sat, Aug 13, 2016 at 10:11 AM, David Leonard wrote: > So this will be the first time ever that I disagree with Lynn. > > While there is no doubt that the plugs he recommends may be the best, I d= o > not use them. Those plugs are $40 each. I use the *NGK BR10EIX* plugs > which are iridium and almost as cool, but most importantly only cost $10. > > From my pocket book, good enough is good enough. While I do have high > duty cycle, I don't have the peak stresses that racers incur, even in my > turbo engine. I find that the iridium plugs last significantly longer an= d > as far as I can tell they are not overheating and are producing great > spark.. I tried the plugs that Lynn recommend but they only last 20 hour= s > or so while the iridiums last in excess of 50 hours. So every 100 flight > hours the cost difference is over $750! and I cant tell difference in the > way my engine runs. > > Steve, I'm sorry that I cant solve your problem, but I am pretty sure the > problem is not the spark plugs. > > Dave Leonard > Turbo Rotary RV-6 > > > On Fri, Aug 12, 2016 at 4:17 PM, Stephen Izett < > flyrotary@lancaironline.net> wrote: > >> Thanks Lynn >> Ill look to get these plugs. >> >> One thing that has changed is I=E2=80=99m now reading very low to zero c= oolant >> pressure. >> Not sure if its the sender or something else. I=E2=80=99ll check it in a= few >> weeks then I can get back to the hangar. >> If a rotary looses coolant or pressure what are the reasons this can >> happening? >> >> Steve >> >> On 13 Aug 2016, at 2:50 AM, Lehanover >> wrote: >> >> I recommend the NGK R6725-11.5 spark plug for 100% duty cycle operation. >> Gapped at .010" to .012". >> >> Race car settings. There you go...............rotary talk. >> >> Lynn E. Hanover >> >> This is what I would do. >> >> Get all of your tuning done on the ground and or, just above a long >> runway. Install a heated oxygen sensor, >> >> Plug heat ranges in the 10s are for heavy street use. Not used (or shoul= d >> not be used, my opinion) for a 100% duty cycle as in aircraft. >> >> If 10s cured your problem you have already demonstrated to yourself the >> problems of a too hot a (high heat range) plug. Once the tip of the plug= is >> overheated you have lost control of your ignition timing. This is a very >> bad idea. Followed by preignition and or, detonation. >> >> Both can lead to severe engine damage. Once your testing is complete an= d >> long flights are next, I would remove and discard the stationary gears a= nd >> magnaflux the rotor gears. You can check all of the engine parts at that >> time. >> >> The NGK R6725-11.5 plug is gifted to most competitive race teams by >> Mazda. >> >> Know what your timing actually is. Mark your flywheel teeth with colored >> paint. Easy to see and very accurate. >> >> Lynn E. Hanover >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.ne >> t:81/lists/flyrotary/List.html >> >> >> > --94eb2c1922a60f21580539f727ed Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I should add that my coolant and oil run very cool, around= 150 most of the time.=C2=A0 If yours are running near the high end of the = temp range maybe listen to Lynn... =C2=A0=C2=A0

Dave Leo= nard

O= n Sat, Aug 13, 2016 at 10:11 AM, David Leonard <flyrotary@lancai= ronline.net> wrote:
So this will be the first= time ever that I disagree with Lynn.

While there is no = doubt that the plugs he recommends may be the best, I do not use them.=C2= =A0 Those plugs are $40 each.=C2=A0 I use the=C2=A0NGK BR10EIX= =C2=A0 plugs which are iridium and almost as cool, but most importantly onl= y cost $10. =C2=A0

From my pocket book, good enoug= h is good enough.=C2=A0 While I do have high duty cycle, I don't have t= he peak stresses that racers incur, even in my turbo engine.=C2=A0 I find t= hat the iridium plugs last significantly longer and as far as I can tell th= ey are not overheating and are producing great spark..=C2=A0 I tried the pl= ugs that Lynn recommend but they only last 20 hours or so while the iridium= s last in excess of 50 hours.=C2=A0 So every 100 flight hours the cost diff= erence is over $750! and I cant tell difference in the way my engine runs.<= /div>

Steve, I'm sorry that I cant solve your proble= m, but I am pretty sure the problem is not the spark plugs.

<= /div>
Dave Leonard
Turbo Rotary RV-6


On Fri, Aug 12,= 2016 at 4:17 PM, Stephen Izett <flyrotary@lancaironline.net= > wrote:
Thanks Lynn
Ill look to get these plugs.

One thing that has changed is I=E2=80=99m now reading very low to = zero coolant pressure.
Not sure if its the sender or something el= se. I=E2=80=99ll check it in a few weeks then I can get back to the hangar.=
If a rotary looses coolant or pressure what are the reasons this= can happening?

Steve

On 13 Aug 2016, at 2:50 AM, Lehanover <<= a href=3D"mailto:flyrotary@lancaironline.net" target=3D"_blank">flyrotary@l= ancaironline.net> wrote:

I recommend the NGK R6725-11.5 spark plug for 100% duty cycle=20 operation.=C2=A0 Gapped at .010" to .012".
=C2=A0
Race car settings.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 There you=20 go...............rotary talk.
=C2=A0
Lynn E. Hanover
=C2=A0
This is what I would do.
=C2=A0
Get all of your tuning done on the ground and or, just above a long ru= nway.=20 Install a heated oxygen sensor,
=C2=A0
Plug heat ranges in the 10s are for heavy street use. Not used (or sho= uld=20 not be used, my opinion) for a 100% duty cycle as in aircraft.
=C2=A0
=C2=A0If 10s cured your problem you have already demonstrated to yours= elf=20 the problems of a too hot a (high heat range) plug. Once the tip of the plu= g is=20 overheated you have lost control of your ignition timing. This is a very ba= d=20 idea. Followed by preignition and or, detonation.
=C2=A0
Both can lead to=C2=A0severe engine damage.=C2=A0 Once your testing is= =20 complete and long flights are next, I would remove and discard the stationa= ry=20 gears and magnaflux the rotor gears.=C2=A0You can check all of the engine p= arts=20 at that time. =C2=A0
=C2=A0
The NGK R6725-11.5 plug is gifted to most competitive race teams by Ma= zda.=20
=C2=A0
Know what your timing actually is. Mark your flywheel teeth with color= ed=20 paint. Easy to see and very accurate.
=C2=A0
Lynn E. Hanover
<Racerpic= .jpg>--
Homepage: =C2=A0http://www.flyrotary.com/
Archive and UnSub: =C2= =A0=C2=A0http://mail.lancaironline.net:81/lists/flyrotar= y/List.html



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