X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 03 Mar 2014 16:04:54 -0500 Message-ID: X-Original-Return-Path: Received: from nm25-vm5.bullet.mail.ne1.yahoo.com ([98.138.91.247] verified) by logan.com (CommuniGate Pro SMTP 6.0.8) with ESMTPS id 6758138 for lml@lancaironline.net; Mon, 03 Mar 2014 15:58:13 -0500 Received-SPF: none receiver=logan.com; client-ip=98.138.91.247; envelope-from=mcmess1919@yahoo.com DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=gcom1024; d=yahoo.com; b=FeadiW83n1vIFrZiQtFL1MetqnjubiArrPyfynfXpFVgpTL+QjTxoEUwLaAffnzPTK9kVk+sBUzhqYYdsMgiOoHU1fmzibYIyvuLEETVqMMwnKF+iarNE70LZEMNRK20Un4mIWYtRsxCMOjLlAslASSnG2BextRSDr80f5VVFHc=; Received: from [98.138.100.112] by nm25.bullet.mail.ne1.yahoo.com with NNFMP; 03 Mar 2014 20:57:36 -0000 Received: from [98.138.104.113] by tm103.bullet.mail.ne1.yahoo.com with NNFMP; 03 Mar 2014 20:57:36 -0000 Received: from [127.0.0.1] by smtp222.mail.ne1.yahoo.com with NNFMP; 03 Mar 2014 20:57:36 -0000 X-Yahoo-Newman-Id: 67382.23902.bm@smtp222.mail.ne1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: XIEtDlgVM1leFabjqq08MktY91Ehyjn2pJFbxO2kejfj9em eGoCXs1y5OhswKvBC3byBBVashb2mg0tgRJBdFzMQAYSjbhSLBWD.QRrEhAP 8H.ECeyJndVTNA0moThtIUQb9oyW8w78Mwx0k43rpvcFruAo.zrjTlN1Q43Z FHgwTsKlUXQvXco9VIqd1W_yYAUwAClAK93pwlKfFL_QMd5CcYB2VmbiVMgg 9aeoy6BUvN.GYYH3CPAJ8t9hyaXwMzrdL6aUyUN1v2q6J6tcaEsl1SDabf71 ZspNop4mBl8dqBQbEqA7h3thexNz4W0wi8fvWxk4yj8YMCeMGTYaaO9MTx0x jg6G7lUjsYP2p3S.4sOHFQKNC0cqKAkn.VImlMQqGKB6YQkZm3ssJIsMXx7Z JESQ4KvwyFqTOgwpAjlPwkkQ8A8c2HjQSQJyUavfi.TPRs85zdA_UU6nQGzB i.UhERlBOkZ.KAcViGdPnRXSCyUUJ4gOnI.jdqiA9035XNtsFIvv49ZNJfDK 3oJUQ7v2jCfdDpJ5u7BZ2qbSecuWvdyxBw5Vg_RiWPFn_2.rF9XI- X-Yahoo-SMTP: rK4i7HqswBC7mDE8.sOiWQeO4CeReXc- X-Rocket-Received: from StevePC (mcmess1919@24.28.82.105 with plain [63.250.193.228]) by smtp222.mail.ne1.yahoo.com with SMTP; 03 Mar 2014 20:57:35 +0000 UTC From: "Steve Colwell" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: Canopy Latch modeling X-Original-Date: Mon, 3 Mar 2014 14:57:37 -0600 X-Original-Message-ID: <01f801cf3723$36208e40$a261aac0$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01F9_01CF36F0.EB861E40" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac83GU86He0BYtJOT9OOoAt/bVPXygAA2Mjg Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_01F9_01CF36F0.EB861E40 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit With Scott Alair's successful return to the airport/open canopy Legacy report, I don't see the need to model and then assume the model is correct. My assumption is: Pilot inputs result in the canopy opening wider. PIO. stall. and loss of control. As previously suggested; leave the gear down, make a gentle coordinated turn, maintain 120 knots, very gentle pitch input, don't change the flap setting until stabilized on long flat final (or don't touch the flaps), and touch down with an extra 10 to 20 knots. Don't try to close the canopy, because you can't. Years ago, my hangar mate launched and the tilt forward canopy on his RV6A floated to about 8" open. He weighs about 225 and he could not get it close enough to latch with most of his weight hanging on the aft rear latch handle. As I recall, he said the canopy opened wide shortly before or after he touched down. I like the idea of a well engineered auto hood latch system because the odds catch up to all of us. Steve Colwell Legacy ------=_NextPart_000_01F9_01CF36F0.EB861E40 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

With Scott Alair’s successful return to the airport/open canopy = Legacy report, I don’t see the need to model and then assume the = model is correct. My assumption is: Pilot inputs = result in the canopy opening wider… PIO… stall… and = loss of control.

As previously suggested; leave the gear down, make a gentle = coordinated turn, maintain 120 knots, very gentle pitch input, = don’t change the flap setting until stabilized on long flat final = (or don’t touch the flaps), and touch down with an extra 10 to 20 = knots. Don’t try to close the canopy, because you = can’t. Years ago, my hangar mate launched and the tilt = forward canopy on his RV6A floated to about 8” open. He = weighs about 225 and he could not get it close enough to latch with most = of his weight hanging on the aft rear latch handle. As I recall, = he said the canopy opened wide shortly before or after he touched down. =

I like the idea of a well engineered auto hood latch system because = the odds catch up to all of us.

Steve Colwell Legacy

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