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What is Lancair using for canopy bonding in the current kits, particularly the L4P aircraft. Rick Lafford Who's unfortunately stuck with spam cans right now. -----Original Message----- From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Sky2high@aol.com Sent: Wednesday, January 21, 2004 8:51 AM To: Lancair Mailing List Subject: [LML] Re: Bonding Plexiglas In a message dated 1/20/2004 9:59:11 PM Central Standard Time, marv@lancaironline.net writes: The transfer tape allows the polycarbonate canopy to be removed from the frame if needed. Rick, Just a wee reminder - Gliders seldom exceed 200Kts, Lancairs regularly do. Pressurized Lancairs have exceptional forces on the windows, but even LNC2 drivers would prefer that the look through parts stay in place. My glass is "bonded" in with the 3M structural adhesive supplied with my 1989 kit (I don't remember the type) and has not been a problem as the plexiglass bonded surface was carefully sanded and cleaned -- A flox fillet and an ample 2 BID was applied over the joint. Scott Krueger Traveling via Lancair (Is there any other way?) ------=_NextPart_000_0006_01C3E073.C774FE60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message

Thanks for the gentle = reminder Scott -=20 understand that the demands on the the canopy can be very high. A=20 reinforcing lay-up or mechanical fasteners on some designs is necessary = to=20 resist the force of pressurization. You might be surprised - the forces = on the=20 glider canopy can be quite high, but the force is mostly into the frame. = Temperature variation can be greater than you would typically see on the = LNC2=20 (64'F ground to <-20'F at 26,000') and the thin, differently=20 expanding carbon frame presents some interesting mounting = challenges.=20 The adhesive system has to be very good with the transfer adhesive and = bonding=20 agent working together to assure a solid well sealed joint. = Unfortunately I can=20 tell you from personal experience that it is impossible to remove the=20 polycarbonate without breaking and attacking it in small pieces.=20 <g>

What is Lancair using for canopy = bonding in=20 the current kits, particularly the L4P aircraft.

Rick Lafford

Who's unfortunately stuck with = spam cans=20 right now.

-----Original Message-----
From: Lancair = Mailing List=20 [mailto:lml@lancaironline.net] On Behalf Of=20 Sky2high@aol.com
Sent: Wednesday, January 21, 2004 8:51=20 AM
To: Lancair Mailing List
Subject: [LML] Re: = Bonding=20 Plexiglas

In a message dated 1/20/2004 9:59:11 PM Central Standard Time,=20 marv@lancaironline.net writes:
The transfer tape allows the polycarbonate canopy = to
be=20 removed from the frame if needed.

Rick,

Just a wee reminder - Gliders seldom exceed 200Kts, Lancairs = regularly=20 do. Pressurized Lancairs have exceptional forces on the windows, = but=20 even LNC2 drivers would prefer that the look through parts stay in=20 place. My glass is "bonded" in with the 3M structural adhesive = supplied=20 with my 1989 kit (I don't remember the type) and has not been a = problem as the=20 plexiglass bonded surface was carefully sanded and cleaned -- A = flox=20 fillet and an ample 2 BID was applied over the joint.

Scott Krueger

Traveling via Lancair (Is there any other=20 way?)

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