X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from aspensprings.uwyo.edu ([129.72.10.32] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTPS id 5796495 for flyrotary@lancaironline.net; Sat, 06 Oct 2012 14:13:02 -0400 Received-SPF: none receiver=logan.com; client-ip=129.72.10.32; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht4.uwyo.edu (extlb.uwyo.edu [172.26.4.4]) by aspensprings.uwyo.edu (8.14.4/8.14.4) with ESMTP id q96ICNGA016311 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Sat, 6 Oct 2012 12:12:23 -0600 (MDT) (envelope-from SBoese@uwyo.edu) Received: from ponyexpress-m10.uwyo.edu ([fe80::60dd:cb9e:6f71:3d48]) by ponyexpress-ht4.uwyo.edu ([fe80::8de7:b225:a85b:d0ee%13]) with mapi id 14.02.0318.001; Sat, 6 Oct 2012 12:12:22 -0600 From: "Steven W. Boese" To: Rotary motors in aircraft Subject: colder spark plugs Thread-Topic: colder spark plugs Thread-Index: AQHNo+30icF5kSbnak20R8FLlgunkg== Date: Sat, 6 Oct 2012 18:12:22 +0000 Message-ID: <3E8191F276108F4481AB0721BBA9269E05CE442C@ponyexpress-m10.uwyo.edu> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [75.196.158.12] Content-Type: multipart/alternative; boundary="_000_3E8191F276108F4481AB0721BBA9269E05CE442Cponyexpressm10u_" MIME-Version: 1.0 --_000_3E8191F276108F4481AB0721BBA9269E05CE442Cponyexpressm10u_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable David, Thank you for the compliment. I have installed a set of the -10 spark plugs and at this point they are lo= ng past the time where the stock plugs normally needed to be replaced. How= long they will continue to work is unknown, but at least that one data poi= nt is consistent with the study and encouraging. Rather than purchasing the expensive thin walled socket, a tool was made to= enlarge the spark plug well in the housing so a conventional socket could = be used. While not elegant, this was done with the engine in the plane and= involved minimal expense. Steve Boese RV6A, 1986 13B NA, RD1A, EC2 ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = David Leonard [wdleonard@gmail.com] Sent: Saturday, October 06, 2012 10:15 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Rotary Get-Together reminder Steve, YOU ARE MY HERO! Rarely outside the realm of paid research taking y= ears have we come across such a complete, thoughtful, yet succinct expos=E8= on any subject. I have been using the BUR bla bla -9 plugs (stock trailing plugs) on both t= he leading and trailing applications for a while now with minimal effect if= any (they are the coldest stock plugs sold by Mazdatrix). Makes sense now= that I read the Boese law of SAG. I think it is time to try out some of t= hese even colder plugs sold by Racingbeat and see if I can get a more than = 25 hrs or so. Actually, if I just use them in the trailing slot, and the -= 9 stock plugs in the leading slot, it should be just as effective. The ide= a being not that I need them cooler when new, but there should be more allo= wance for core degradation before SAG begins. Also, running cooler they ma= y not degrade as quickly. http://www.racingbeat.com/RX7-1986-1992/Ignition/11547.html They are not cheap! could go through 4 regular plugs for the price of one o= f these... and they need a special thin-walled socket to install them and R= B is charging $81 for those. Will look around for better prices. -- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Fri, Oct 5, 2012 at 3:26 PM, Steven W. Boese > wrote: The content of the SAG presentation last weekend at Pocahontis has been add= ed to the website: www.rotarycopilot.com as a page labeled "SAG part 2". The conclusion of the study is that if SAG develops on both rotors of a 13B= , power to all the ignition coils could shut off and the engine would conti= nue to run. This is yet to be tested in flight, however. The only photos of the event I took are not posted since they were of the c= horus line of wives. Sorry, you had to be there. Steve Boese RV6A, 1986 13B NA, RD1A, EC2 --_000_3E8191F276108F4481AB0721BBA9269E05CE442Cponyexpressm10u_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

David,

 

Thank you for the compliment.

 

I have installed a set of the -10 spark plugs and at this point they are= long past the time where the stock plugs normally needed to be replac= ed.  How long they will continue to work is unknown, but at least that= one data point is consistent with the study and encouraging.

 

Rather than purchasing the expensive thin walled socket, a tool was= made to enlarge the spark plug well in the housing so a conventional socke= t could be used.  While not elegant, this was done with the engin= e in the plane and involved minimal expense.

 

Steve = Boese

RV6A, 1986 13B NA, RD1A, EC2

 

From: Rotary motors in aircraft [flyrotary= @lancaironline.net] on behalf of David Leonard [wdleonard@gmail.com]
Sent: Saturday, October 06, 2012 10:15 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Rotary Get-Together reminder

Steve, YOU ARE MY HERO!  Rarely outside the realm of paid researc= h taking years have we come across such a complete, thoughtful, yet succinc= t expos=E8 on any subject.

I have been using the BUR bla bla -9 plugs (stock trailing plugs) on both t= he leading and trailing applications for a while now with minimal effect if= any (they are the coldest stock plugs sold by Mazdatrix).  Makes sens= e now that I read the Boese law of SAG.  I think it is time to try out some of these even colder plugs sold by Raci= ngbeat and see if I can get a more than 25 hrs or so.  Actually, if I = just use them in the trailing slot, and the -9 stock plugs in the leading s= lot, it should be just as effective.  The idea being not that I need them cooler when new, but there should be m= ore allowance for core degradation before SAG begins.  Also, running c= ooler they may not degrade as quickly.

http://www.racingbeat.com/RX7-1986-1992/Ignition/11547.html<= /a>

They are not cheap! could go through 4 regular plugs for the price of one o= f these... and they need a special thin-walled socket to install them and R= B is charging $81 for those.  Will look around for better prices.

--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.Rota= ryRoster.net
http://RotaryRoster.n= et

On Fri, Oct 5, 2012 at 3:26 PM, Steven W. Boese = <SBoese@uwyo.edu> wrote:

The content of the SAG presentation last weekend at Pocahontis has been added to the website:

 

www.rotarycop= ilot.com

 

as a page labeled "SAG part 2".

 

The conclusion of the study is that if SAG develops on both rotors of a = 13B, power to all the ignition coils could shut off and the engine w= ould continue to run.  This is yet to be tested in flight, however.

 

The only photos of the event I took are not posted since they = were of the chorus line of wives.  Sorry, you had to be there.

 

Steve Boese

RV6A, 1986&n= bsp;13B NA, RD1A, EC2


 




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