From: "David Leonard" <flyrotary@lancaironline.net>
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Date: Sat, 13 Aug 2016 10:11:59 -0700
Message-ID: <CAOFHbnoP_qeLTbm2QBXQ8DzmTs+Rby=j-Y5ZmWExdtVDoXPriw@mail.gmail.com>
Subject: Re: [FlyRotary] Re: He said again......
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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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.  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 and 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 hours 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 co=
olant
> 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 <flyrotary@lancaironline.net> 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 should
> 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 and
> long flights are next, I would remove and discard the stationary gears an=
d
> 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
> <Racerpic.jpg>--
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.
> net:81/lists/flyrotary/List.html
>
>
>

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<div dir=3D"ltr">So this will be the first time ever that I disagree with L=
ynn.<div><br></div><div>While there is no doubt that the plugs he recommend=
s may be the best, I do not use them.=C2=A0 Those plugs are $40 each.=C2=A0=
 I use the=C2=A0<b style=3D"margin:0px;padding:0px;border:0px;outline:0px;f=
ont-size:14px;vertical-align:baseline;color:rgb(0,0,0);font-family:Arial,Ge=
neva,Sans,&quot;sans serif&quot;;line-height:17px;text-align:justify;backgr=
ound:rgb(191,191,191)">NGK BR10EIX</b>=C2=A0 plugs which are iridium and al=
most as cool, but most importantly only cost $10. =C2=A0</div><div><br></di=
v><div>From my pocket book, good enough is good enough.=C2=A0 While I do ha=
ve high duty cycle, I don&#39;t have the peak stresses that racers incur, e=
ven in my turbo engine.=C2=A0 I find that the iridium plugs last significan=
tly longer and as far as I can tell they are not overheating and are produc=
ing great spark..=C2=A0 I tried the plugs that Lynn recommend but they only=
 last 20 hours or so while the iridiums last in excess of 50 hours.=C2=A0 S=
o every 100 flight hours the cost difference is over $750! and I cant tell =
difference in the way my engine runs.</div><div><br></div><div>Steve, I&#39=
;m sorry that I cant solve your problem, but I am pretty sure the problem i=
s not the spark plugs.</div><div><br></div><div>Dave Leonard</div><div>Turb=
o Rotary RV-6</div><div><br></div></div><div class=3D"gmail_extra"><br><div=
 class=3D"gmail_quote">On Fri, Aug 12, 2016 at 4:17 PM, Stephen Izett <span=
 dir=3D"ltr">&lt;<a href=3D"mailto:flyrotary@lancaironline.net" target=3D"_=
blank">flyrotary@lancaironline.net</a>&gt;</span> wrote:<br><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pa=
dding-left:1ex"><div style=3D"word-wrap:break-word">Thanks Lynn<div>Ill loo=
k to get these plugs.</div><div><br></div><div>One thing that has changed i=
s I=E2=80=99m now reading very low to zero coolant pressure.</div><div>Not =
sure if its the sender or something else. I=E2=80=99ll check it in a few we=
eks then I can get back to the hangar.</div><div>If a rotary looses coolant=
 or pressure what are the reasons this can happening?</div><div><br></div><=
div>Steve</div><div><br><div><blockquote type=3D"cite"><div><div class=3D"h=
5"><div>On 13 Aug 2016, at 2:50 AM, Lehanover &lt;<a href=3D"mailto:flyrota=
ry@lancaironline.net" target=3D"_blank">flyrotary@lancaironline.net</a>&gt;=
 wrote:</div><br></div></div><div><div><div class=3D"h5">


<div style=3D"font-size:10pt;font-family:Arial"><font size=3D"2" face=3D"Ar=
ial">
<div>
<div>I recommend the NGK R6725-11.5 spark plug for 100% duty cycle=20
operation.=C2=A0 Gapped at .010&quot; to .012&quot;.</div>
<div>=C2=A0</div>
<div>Race car settings.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 There you=20
go...............rotary talk.</div>
<div>=C2=A0</div>
<div>Lynn E. Hanover</div>
<div>=C2=A0</div>
<div>This is what I would do.</div>
<div>=C2=A0</div>
<div>Get all of your tuning done on the ground and or, just above a long ru=
nway.=20
Install a heated oxygen sensor,</div>
<div>=C2=A0</div>
<div>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.</div>
<div>=C2=A0</div>
<div>=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. </div>
<div>=C2=A0</div>
<div>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</div>
<div>=C2=A0</div>
<div>The NGK R6725-11.5 plug is gifted to most competitive race teams by Ma=
zda.=20
</div>
<div>=C2=A0</div>
<div>Know what your timing actually is. Mark your flywheel teeth with color=
ed=20
paint. Easy to see and very accurate. </div>
<div>=C2=A0</div>
<div>Lynn E. Hanover</div></div></font></div></div></div><span>&lt;Racerpic=
.jpg&gt;</span>--<br>Homepage: =C2=A0<a href=3D"http://www.flyrotary.com/" =
target=3D"_blank">http://www.flyrotary.com/</a><br>Archive and UnSub: =C2=
=A0=C2=A0<a href=3D"http://mail.lancaironline.net:81/lists/flyrotary/List.h=
tml" target=3D"_blank">http://mail.lancaironline.<wbr>net:81/lists/flyrotar=
y/List.<wbr>html</a><br></div></blockquote></div><br></div></div></blockquo=
te></div><br></div>

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