X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from willowsprings.uwyo.edu ([129.72.10.31] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTPS id 5482488 for flyrotary@lancaironline.net; Sun, 15 Apr 2012 20:17:40 -0400 Received-SPF: none receiver=logan.com; client-ip=129.72.10.31; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht4.uwyo.edu (extlb.uwyo.edu [172.26.4.4]) by willowsprings.uwyo.edu (8.14.4/8.14.4) with ESMTP id q3G0Fsn6009157 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Sun, 15 Apr 2012 18:17:01 -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 14.01.0339.001; Sun, 15 Apr 2012 18:16:20 -0600 From: "Steven W. Boese" To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: Laser Ignition, was: [FlyRotary] Re: The 16X is A L I V E... Thread-Topic: [FlyRotary] Re: Laser Ignition, was: [FlyRotary] Re: The 16X is A L I V E... Thread-Index: AQHNG0MlQJlncm2EZUaC/AnE4H40BpacipKW Date: Mon, 16 Apr 2012 00:16:19 +0000 Message-ID: <3E8191F276108F4481AB0721BBA9269E05C3EEBC@ponyexpress-m10.uwyo.edu> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [75.196.241.97] Content-Type: multipart/alternative; boundary="_000_3E8191F276108F4481AB0721BBA9269E05C3EEBCponyexpressm10u_" MIME-Version: 1.0 --_000_3E8191F276108F4481AB0721BBA9269E05C3EEBCponyexpressm10u_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Although more powerful ignition systems may be beneficial under some condit= ions, it will not help with sag. This is because sag is not due to the fail= ure of the plug to produce a spark. Steve ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = downing.j@sbcglobal.net [downing.j@sbcglobal.net] Sent: Sunday, April 15, 2012 2:06 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Laser Ignition, was: [FlyRotary] Re: The 16X is A = L I V E... Charlie, I'm really quite surprised that someone on the rotary site hasn't = tried an MSD Digital Capacitive Discharge ignition system, it might even bl= ast a few more hours out of the a set of plugs. John ----- Original Message ----- From: Charlie England To: Rotary motors in aircraft Sent: Sunday, April 15, 2012 2:06 PM Subject: [FlyRotary] Re: Laser Ignition, was: [FlyRotary] Re: The 16X is A = L I V E... I can assure you that while you might need to ground one to 'make it quit',= there are lots of ways it can (and does) quit on its own without your ass= istance. There's a reason that mags are the only truly redundant item that's standar= d equipment on a basic FAA-blessed aircraft, & it isn't because of big comb= ustion chambers. FWIW, I won't be trying to home-brew a lasar ignition system. But if multip= le car makers are taking a serious look, it's a pretty safe bet that they a= re confident in both the efficiency gains and the potential reliability (th= ey really do hate warranty returns, and EPA performance requirements last a= looong time on new cars). Once a system has been on the road for a few yea= rs, I'd sure be interested in the motor that's designed for it. After all, what's the MTBF for rotary plugs in aviation use, 30-40 hrs? How= much longer until someone gets the dreaded 'SAG' while trying to climb out= of a valley? Charlie --_000_3E8191F276108F4481AB0721BBA9269E05C3EEBCponyexpressm10u_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Although more powerful ignition systems may be beneficial under som= e conditions, it will not help with sag. This is because sag is not due to = the failure of the plug to produce a spark.

 

Steve
From: Rotary motors in aircraft [flyrotary= @lancaironline.net] on behalf of downing.j@sbcglobal.net [downing.j@sbcglob= al.net]
Sent: Sunday, April 15, 2012 2:06 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Laser Ignition, was: [FlyRotary] Re: The 16= X is A L I V E...

Charlie, I'm really quite surprised th= at someone on the rotary site hasn't tried an MSD Digital Capacitive Discha= rge ignition system, it might even blast a few more hours out of the a set = of plugs.  John
----- Original Message -----
Sent: Sunday, April 15, 2012 2:06 PM=
Subject: [FlyRotary] Re: Laser Ignit= ion, was: [FlyRotary] Re: The 16X is A L I V E...

I can assure you that while you might need to ground one to 'make it quit',=   there are lots of ways it can (and does) quit on its own without you= r assistance.

There's a reason that mags are the only truly redundant item that's standar= d equipment on a basic FAA-blessed aircraft, & it isn't because of big = combustion chambers.

FWIW, I won't be trying to home-brew a lasar ignition system. But if multip= le car makers are taking a serious look, it's a pretty safe bet that they a= re confident in both the efficiency gains and the potential reliability (th= ey really do hate warranty returns, and EPA performance requirements last a looong time on new cars). Once a s= ystem has been on the road for a few years, I'd sure be interested in the m= otor that's designed for it.

After all, what's the MTBF for rotary plugs in aviation use, 30-40 hrs? How= much longer until someone gets the dreaded 'SAG' while trying to climb out= of a valley?

Charlie
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