X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 11 Feb 2009 13:02:41 -0500 Message-ID: X-Original-Return-Path: Received: from web33901.mail.mud.yahoo.com ([209.191.69.179] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with SMTP id 3487251 for lml@lancaironline.net; Wed, 11 Feb 2009 00:53:24 -0500 Received: (qmail 22270 invoked by uid 60001); 11 Feb 2009 05:53:24 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type:Message-ID; b=t710D6L7lkBeHz/giC6wwG0T6PHsD46ic4z4te9iCihzVEVj6fKkhqaVYQsOd5YZR7ytvTE0JEPkxXkwusj6mQhZB3VX7uQrATVhLsJczk/JmBM6QAst0Lh4CFMu2Y4anK5TtGoKRGWOuxo9rOISuiEARrifp9hc/PRQKH/G3ZM=; X-YMail-OSG: C9HsD1kVM1nbzL3aX7fxhHLW.yP9pI6NVkNzY4.NnuAft8N1nyF_pNWcWosfSn3cQ.vPuwWbePeCv8xoeB_ZxGFpHQbgNas5Z.lkV6fIX8X2frUeMwWeA6mr2DdWTi_Q6DKtCNxA3cdA2m5XiyZzeIXqTiNpNsbakWAH_O_JvxICDqLAXe7pm56WdzS8X.Xb13BmlwZ.UhGjqPXvzEs.9e3hRQ-- Received: from [71.208.12.1] by web33901.mail.mud.yahoo.com via HTTP; Tue, 10 Feb 2009 21:53:24 PST X-Mailer: YahooMailWebService/0.7.260.1 X-Original-Date: Tue, 10 Feb 2009 21:53:24 -0800 (PST) From: Bill Hannahan Reply-To: wfhannahan@yahoo.com Subject: Legacy damaged X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1784397345-1234331604=:21539" X-Original-Message-ID: <158028.21539.qm@web33901.mail.mud.yahoo.com> --0-1784397345-1234331604=:21539 Content-Type: text/plain; charset=iso-8859-7 Content-Transfer-Encoding: quoted-printable 2 My thoughts have been running similar to Jim=A2s, but rather than make it a checklist item it would be automatic, like the safety catch on a car hood. =A0 To enter the plane unlatch the canopy in the usual way, raise it 1-2 inches, slip yo= ur fingers under the edge to release the safety catch, open the canopy all the way. =A0 During taxi the safety catch would automatically engage, yet allow ventilation. If= the pilot takes off the latch would prevent the large excursions, 6-12 inches, which seem to be part of a feedback loop producing the large oscillations. =A0 Since it is automatic it is not a checklist item and cannot be forgotten. =A0 Regards, Bill Hannahan =20 wfhannahan@yahoo.com --- On Tue, 2/10/09, Jim Scales wrote: From: Jim Scales Subject: [LML] Re: Legacy damaged To: lml@lancaironline.net Date: Tuesday, February 10, 2009, 11:32 AM =20 #yiv1610586885 .hmmessage P { PADDING-RIGHT:0px;PADDING-LEFT:0px;PADDING-BOTTOM:0px;MARGIN:0px;PADDING-TO= P:0px;} #yiv1610586885 { FONT-SIZE:10pt;FONT-FAMILY:Verdana;} Being an ES flyer I am not really qualified to enter this thread but I will= =20 anyway.=A0Just a tinkerer's thoughts. =A0 An item for=A0a checklist on the hinged canopy could be "Check Canopy=20 Safety Catch".=A0 It would refer to a safety chain (or cable)=A0very=20 similar to that which is used=A0for security on a door in a hotel.=A0I'm=20 sure the assembly=A0would need to be stronger=A0but the design could be=20 similar, very simple and pretty well fool proof (as long as it is connected= , of=20 course). =A0 I=A0would think this=A0would control the=A0problem, if the latch=20 releases, by holding the canopy to maximum opening of a couple of=20 inches.=A0No need to attempt to close it. No electronics.=A0 No chance of= =20 failure of micro switches, lights or horns.=A0 Very inexpensive. =A0 It does not insure that the canopy latches are properly operated but, if=20 the reports of controllability when the canopy pops are correct,=A0it would= =20 prevent serious problems and allow the plane to be landed safely.=A0 It wou= ld=20 also function in the case of a late canopy release such as in cruise, in wh= ich=20 case warning systems would be of little value. =A0 If this line of thought has been followed in the past, and found to be a=20 non-solution, I apologize for taking up space. =A0 Just a thought............. =A0 Jim Scales =A0 =A0 ----- Original Message -----=20 From: Bill Kennedy=20 To: lml@lancaironline.net=20 Sent: Monday, February 09, 2009 11:49=20 PM Subject: [LML] Legacy damaged =20 Forget about winch systems, etc. for the canopy. If it comes=20 open in-flight, ignore it and land the plane as soon as practical, close = the=20 canopy and go about your business.=20 =0A=0A=0A --0-1784397345-1234331604=:21539 Content-Type: text/html; charset=iso-8859-7 Content-Transfer-Encoding: quoted-printable
2

My thoughts have been running similar to Jim=A2s, but rather than make it a checklist item it would be automatic, like the safety catch on a car hood.<= o:p>

 

To enter the plane unlatch the canopy in the usual way, raise it 1-2 inches, slip yo= ur fingers under the edge to release the safety catch, open the canopy all the way.

 

During taxi the safety catch would automatically engage, yet allow ventilation. If= the pilot takes off the latch would prevent the large excursions, 6-12 inches, which seem to be part of a feedback loop producing the large oscillations.<= o:p>

 

Since it is automatic it is not a checklist item and cannot be forgotten.

 



Regards,
Bill Hannahan


--- On Tue, 2/10/09, Jim Scales <joscal= es98@hotmail.com> wrote:
From: Jim S= cales <joscales98@hotmail.com>
Subject: [LML] Re: Legacy damagedTo: lml@lancaironline.net
Date: Tuesday, February 10, 2009, 11:32 AM
=20
Being an ES flyer I am not really qualified to enter this thread but I= will=20 anyway. Just a tinkerer's thoughts.
 
An item for a checklist on the hinged canopy could be "Check Cano= py=20 Safety Catch".  It would refer to a safety chain (or cable) very= =20 similar to that which is used for security on a door in a hotel. = I'm=20 sure the assembly would need to be stronger but the design could = be=20 similar, very simple and pretty well fool proof (as long as it is connected= , of=20 course).
 
I would think this would control the problem, if the la= tch=20 releases, by holding the canopy to maximum opening of a couple of=20 inches. No need to attempt to close it. No electronics.  No chanc= e of=20 failure of micro switches, lights or horns.  Very inexpensive.
 
It does not insure that the canopy latches are properly operated but, = if=20 the reports of controllability when the canopy pops are correct, it wo= uld=20 prevent serious problems and allow the plane to be landed safely.  It = would=20 also function in the case of a late canopy release such as in cruise, in wh= ich=20 case warning systems would be of little value.
 
If this line of thought has been followed in the past, and found to be= a=20 non-solution, I apologize for taking up space.
 
Just a thought.............
 
Jim Scales
 
 
----- Original Mess= age -----
Sent: Monday= , February 09, 2009 11:49=20 PM
Subject: [LM= L] Legacy damaged

Forget about winch systems, etc. for the canopy. If it com= es=20 open in-flight, ignore it and land the plane as soon as practical, close = the=20 canopy and go about your business.

=0A=0A=0A=0A --0-1784397345-1234331604=:21539--