X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-galgo.atl.sa.earthlink.net ([209.86.89.61] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTP id 6796272 for lml@lancaironline.net; Tue, 25 Mar 2014 14:21:37 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.61; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=FplbgiG0Ap2icJXUG2/5ua1SkKV8oAMVVQhPFfLVC1f2h9fTcnm9d3Sx+fQGQiHx; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [71.241.219.20] (helo=[192.168.1.24]) by elasmtp-galgo.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1WSVy0-0008Qy-1G for lml@lancaironline.net; Tue, 25 Mar 2014 14:20:52 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-78-852623823 Subject: Re: [LML] Re: Legacy canopy safety latch Date: Tue, 25 Mar 2014 14:20:51 -0400 In-Reply-To: To: "Lancair Mailing List" References: Message-Id: <93960525-05C2-45F4-9D95-6FC5C5622EE6@earthlink.net> X-Mailer: Apple Mail (2.1085) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da94016d500ca2232c525dd2d83b6e86155fd350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 71.241.219.20 --Apple-Mail-78-852623823 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Bob, does that mean you have 8 sensors for the 8 latches on your door? Colyn On Mar 25, 2014, at 1:45 PM, Robert R Pastusek wrote: I had a chance to talk to Larry Hinman from Lancair about this during = our Continental-sponsored Maintenance Clinic in Alabama this weekend. = Most of you know that Valin Thorn, supported by others, has continued to = refine the problem and potential solutions. =20 Larry offered that the Lancair engineers are now working on the design = of a warning light kit that would activate any time the canopy is closed = but not fully latched. While this is recognized as only one of several = recommended solutions, and has been recommended by several as an adjunct = to a re-designed latching system, a warning light would be very easy to = install--and to retrofit--as compared to a re-designed latching = mechanism. While not as elegant as what =93could be done,=94 I wanted to = recognize and advise you of this effort. Many builders, including me, have already incorporated such a door = warning light system in our aircraft. For me, it=92s worked twice to = advise when one of the eight complex latches in my IV-P lost a cir-clip = and failed to go =93over-center.=94 Warning lights, if properly = designed, are very reliable and easy to install. Why not consider doing = this while folks work on other =93mechanical=94 solutions? =20 Bob =20 =20 =20 =20 From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of = Stevens Family Sent: Tuesday, March 25, 2014 11:47 AM To: lml@lancaironline.net Subject: [LML] Legacy canopy safety latch =20 I know the thread about designing a safety latch for the Legacy canopy = has pretty much run its course. However, I was discussing the issues = with a colleague recently, and we came up with an idea. I should add, = that neither of us has any particular involvement with the Legacy, as I = am building a L360, so this idea is offered as a concept only, for those = of you with a more pressing interest in the problem to throw around in = the ideas pool. =20 Attached is a very rough sketch of the idea, if you can follow it. If it = could be made to work, it would have the advantages as follows=85. 1 It needs no input from the occupants to arm or = latch it. The vane would move it to its=92 armed position once the = airspeed reached that required to turn the weather vane parallel to the = centreline of the aircraft. 2 It has no electrical components 3 In an emergency, rescuers unfamiliar with the = aircraft=92s latching mechanism would not need to do anything to unlatch = it, but would need only to operate the normal latch, because the spring = loaded weather vane would turn at right angles to the aircraft = centreline once the airspeed dropped below the designated speed. =20 The negatives are 1 It might look a bit ugly from the outside, unless = it is artistically sculptured 2 It would add something of an obstacle at about = head level for the occupants when reaching into the baggage area in = flight. =20 I hope this isn=92t a really silly idea!! =20 Regards, =20 Rob Stevens Perth, Western Australia. =20 --Apple-Mail-78-852623823 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 Bob, does that mean you have 8 sensors for the 8 = latches on your = door?

Colyn

On Mar 25, = 2014, at 1:45 PM, Robert R Pastusek wrote:

I had a chance to talk to Larry Hinman from Lancair about this = during our Continental-sponsored Maintenance Clinic in Alabama this = weekend. Most of you know that Valin Thorn, supported by others, has = continued to refine the problem and potential = solutions.
 
Larry offered that the Lancair engineers are now working on = the design of a warning light kit that would activate any time the = canopy is closed but not fully latched. While this is recognized as only = one of several recommended solutions, and has been recommended by = several as an adjunct to a re-designed latching system, a warning light = would be very easy to install--and to retrofit--as compared to a = re-designed latching mechanism. While not as elegant as what =93could be = done,=94 I wanted to recognize and advise you of this = effort.

Many builders, including me, have already incorporated = such a door warning light system in our aircraft. For me, it=92s worked = twice to advise when one of the eight complex latches in my IV-P lost = a cir-clip and failed to go =93over-center.=94 = Warning lights, if properly designed, are very reliable and easy to = install. Why not consider doing this while folks work on other = =93mechanical=94 solutions?
Bob
 
 
 
 
From: Lancair Mailing List = [mailto:lml@lancaironline.net] On Behalf Of Stevens = Family
Sent: Tuesday, March 25, 2014 = 11:47 AM
To: lml@lancaironline.net
Subj= ect: [LML] Legacy = canopy safety latch
 
I know = the thread about designing a safety latch for the Legacy canopy has = pretty much run its course. However, I was discussing the issues with a = colleague recently, and we came up with an idea. I should add, that = neither of us has any particular involvement with the Legacy, as I am = building a L360, so this idea is offered as a concept only, for those of = you with a more pressing interest in the problem to throw around in the = ideas pool.
 
Attached is a very rough sketch of the idea, if you can = follow it. If it could be made to work, it would have the advantages as = follows=85.
1 It needs no input from the occupants to arm or latch it. = The vane would move it to its=92 armed position once the airspeed = reached that required to turn the weather vane parallel to the = centreline of the aircraft.
2 It has no electrical = components
3 In an emergency, rescuers unfamiliar with the aircraft=92s = latching mechanism would not need to do anything to unlatch it, but = would need only to operate the normal latch, because the spring loaded = weather vane would turn at right angles to the aircraft centreline once = the airspeed dropped below the designated = speed.
 
The negatives are
1 It might look a bit ugly from the outside, unless it is = artistically sculptured
2 It would add something of an obstacle at about head level = for the occupants when reaching into the baggage area in = flight.
 
I hope this isn=92t a really silly = idea!!
 
Regards,
 
Rob Stevens
Perth,
Western = Australia.
 

=
= --Apple-Mail-78-852623823--