Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Thu, 21 Oct 2004 02:20:12 -0400 Message-ID: X-Original-Return-Path: Received: from rwcrmhc13.comcast.net ([204.127.198.39] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 481141 for lml@lancaironline.net; Wed, 20 Oct 2004 23:21:47 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.198.39; envelope-from=edechazal@comcast.net Received: from cc1860069a (pcp09040864pcs.rocsth01.mi.comcast.net[69.244.182.42]) by comcast.net (rwcrmhc13) with SMTP id <2004102103211701500mvqs9e>; Thu, 21 Oct 2004 03:21:17 +0000 X-Original-Message-ID: <039701c4b71c$ac89dd20$6401a8c0@rocsth01.mi.comcast.net> From: X-Original-To: "Lancair Mailing List" References: Subject: Re: S-TEC 50 Problem - LNC2 X-Original-Date: Wed, 20 Oct 2004 23:18:44 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0394_01C4B6FB.24EA5500" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0394_01C4B6FB.24EA5500 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Scott - Wow! Sounds like you've got the same symptoms I've got. = Started happening to me this last April (Sun spot activity?) although = that was the hard pitch commands. The porpoising has been sporadic = since first flight 4 years ago (300 hours on the plane). =20 As I think I mentioned, I've isolated the transducer connector out of = the picture, it's not that. Could be the computer connector I suppose, = but I've never touched my box nor the connector (since the factory built = the panel originally). =20 I'm hopeful that by putting a voltmeter on the three transducer wires, I = can positively rule it in or out as the problem. And if I'm clever in = my jumper wire setup, I'll be able to "fail" the transducer and see if = the symptoms repeat. =20 Tell me more about this accelerometer you referenced. I did not know = there was one in the box. I can at times feel the stick moving for/aft = significantly and the plane change pitch noticeably, in smooth air, = perfectly trimmed, with no apparent justification according to the = altimeter. Could it be that the accelerometer has failed??? But, = sometime my altitude hold works well, at least for a time, so..... =20 It really seems to me that if we were to describe all this to the S-TEC = programmer guy, he'd be able to diagnose it in a heartbeat. That'll be = my next direction after some more flight tests. As a last resort, we can pair up and fly down to Texas in formation for = some S-TEC quality time. =20 Regards, Ed de Chazal Romeo Michigan ------=_NextPart_000_0394_01C4B6FB.24EA5500 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Scott - Wow! = Sounds like you've=20 got the same symptoms I've got. Started happening to me this last = April=20 (Sun spot activity?) although that was the hard pitch = commands. The=20 porpoising has been sporadic since first flight 4 years ago (300 hours = on the=20 plane).

As I think I mentioned, = I've isolated=20 the transducer connector out of the picture, it's not that. Could = be the=20 computer connector I suppose, but I've never touched my box nor the = connector=20 (since the factory built the panel originally).

I'm hopeful that by = putting a=20 voltmeter on the three transducer wires, I can positively rule it in or = out as=20 the problem. And if I'm clever in my jumper wire setup, I'll be = able to=20 "fail" the transducer and see if the symptoms repeat. =

Tell me more about this = accelerometer=20 you referenced. I did not know there was one in the box. I = can at=20 times feel the stick moving for/aft significantly and the plane change = pitch=20 noticeably, in smooth air, perfectly trimmed, with no apparent = justification=20 according to the altimeter. Could it be that the accelerometer has = failed??? But, sometime my altitude hold works well, at least for = a time,=20 so.....

It really seems to me = that if we were=20 to describe all this to the S-TEC programmer guy, he'd be able to = diagnose it in=20 a heartbeat. That'll be my next direction after some more flight=20 tests.

As a last resort, we = can pair up and=20 fly down to Texas in formation for some S-TEC quality time. =

Regards,

Ed de = Chazal

Romeo = Michigan

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