X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 07 Apr 2009 19:31:46 -0400 Message-ID: X-Original-Return-Path: Received: from nschwmtas06p.mx.bigpond.com ([61.9.189.152] verified) by logan.com (CommuniGate Pro SMTP 5.2.13) with ESMTP id 3572552 for lml@lancaironline.net; Tue, 07 Apr 2009 09:38:52 -0400 Received-SPF: pass receiver=logan.com; client-ip=61.9.189.152; envelope-from=frederickmoreno@bigpond.com Received: from nschwotgx02p.mx.bigpond.com ([143.238.210.80]) by nschwmtas06p.mx.bigpond.com with ESMTP id <20090407133812.QZLP3101.nschwmtas06p.mx.bigpond.com@nschwotgx02p.mx.bigpond.com> for ; Tue, 7 Apr 2009 13:38:12 +0000 Received: from Razzle ([143.238.210.80]) by nschwotgx02p.mx.bigpond.com with ESMTP id <20090407133811.OTSD14063.nschwotgx02p.mx.bigpond.com@Razzle> for ; Tue, 7 Apr 2009 13:38:11 +0000 From: "Frederick Moreno" X-Original-To: "Lancair Mail" Subject: FW: [LML] Tridair fasteners X-Original-Date: Tue, 7 Apr 2009 21:38:01 +0800 X-Original-Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_013A_01C9B7C9.220AC350" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 thread-index: Acm3aB6OuDk1Fd3hRMmFKKbNz8EdQAAG6Kgw Importance: Normal X-RPD-ScanID: Class unknown; VirusThreatLevel unknown, RefID str=0001.0A150201.49DB5744.0048,ss=1,fgs=0 X-SIH-MSG-ID: rx07GdD3TFa2kTAvmTy2alorgFm6/gF5uMhSBI0wt0lHEVbCvcLAQcmrbaFAwZDu1C4oc0+VTyFic7zjTY7SuNq4K71TSrLZ5/E2 This is a multi-part message in MIME format. ------=_NextPart_000_013A_01C9B7C9.220AC350 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I used these same fasteners on my Lancair IV having learned about them = from Brent Regan.=20 =20 I selected them instead of using hinges along the side of the cowl = because I modified my cowl inlets such that the side seam between bottom and top cowl is no longer straight, but curves up at the front. =20 =20 I also selected them because I have incorporated cowl flaps to control = the cooling air flow, and when closed, they increase the separation force between top and bottom cowl requiring a lot of shear resistance. The Tridair fasteners (part numbers from Bill, below) have exceptional shear strength. They are produced by Alcoa which has a huge aerospace = fastening business based in Southern California. Alcoa bought all the big name fasteners, put them under one roof, but kept the original brand names. = They were probably responsible for the 787 fastener delays. =20 =20 Some cautions:=20 =20 1) As I recall the studs are $18 apiece and the receptacles are $24 apiece or $42 a set. That was a few years ago. =20 2) They require precision drilled hole for the stud.=20 3) They use a quad lead thread and little engagement tabs on the = bottom of the studs which engage a spring loaded ratchet in the socket. You = only tighten them finger tight. They are locked by the spring loaded = ratchet. Do not over tighten! 4) Don't ever force them into their hole. You will damage the = threads and/or damage the little engagement tabs on the bottom of the stud. If = the stud does not go in, try some other studs to get the alignment corrected = (it must be dead nuts right on the money), wiggle the cowl, but DON"T FORCE THEM. Been there, done that once, and at $18 each, that was enough. Putting your cowl on will require a bit of extra patience as they can be fiddly, particularly if the temperature changes such as can happen when = the top cowl is in the shade, bottom cowl is in the sun, and you then try to = put them together. As I said, patience. 5) If you are not in the USA, fuggetaboutit. They are DOD export controlled, and can not be shipped outside of the USA without a Dept. of Commerce permit. Really! Been there, done that too. =20 =20 Fred Moreno =20 =20 Hi Harper. =20 I just recently looked into these fastners and found them from: =20 Johnson Aerospace 28294 Constellation Rd. Santa Clarita, CA 91355 661-702-9949 =20 I spoke with Margo Bryant.=20 =20 The part numbers are: =20 CA1820-2 CA1810 Good luck. =20 Bill Burger =20 =20 ------=_NextPart_000_013A_01C9B7C9.220AC350 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I used these same fasteners on my Lancair IV having = learned about them from Brent Regan.

 

 I selected them instead of using hinges along = the side of the cowl because I modified my cowl inlets such that the side seam = between bottom and top cowl is no longer straight, but curves up at the = front. 

 

I also selected them because I have incorporated cowl = flaps to control the cooling air flow, and when closed, they increase the = separation force between top and bottom cowl requiring a lot of shear = resistance.  The Tridair fasteners (part numbers from Bill, below) have exceptional shear = strength.  They are produced by Alcoa which has a huge aerospace fastening business = based in Southern California.  Alcoa bought all the big name fasteners, put them under one roof, but = kept the original brand names.  They were probably responsible for the 787 = fastener delays. 

 

Some cautions:

 

1)     As I recall the studs are $18 apiece and the receptacles are $24 apiece or = $42 a set.   That was a few years ago.  

2)     They require precision drilled hole for the stud.

3)     They use a quad lead thread and little engagement tabs on the bottom of the = studs which engage a spring loaded ratchet in the socket.   You only tighten them finger tight.   They are locked by the spring = loaded ratchet.  Do not over tighten!

4)     Don’t ever force them into their hole.  You will damage the = threads and/or damage the little engagement tabs on the bottom of the = stud.  If the stud does not go in, try some other studs to get the alignment = corrected (it must be dead nuts right on the money), wiggle the cowl, but = DON”T FORCE THEM.   Been = there, done that once, and at $18 each, that was enough.  Putting your cowl on = will require a bit of extra patience as they can be fiddly, particularly if = the temperature changes such as can happen when the top cowl is in the shade, bottom = cowl is in the sun, and you then try to put them together.   As I said, patience.

5)     If you are not in the USA, fuggetaboutit.  They are DOD export controlled, and can not be = shipped outside of the USA without a Dept. of = Commerce permit.  Really!  Been there, done that too.  =

 

Fred Moreno

 

 

Hi Harper.

 

I just recently looked into these fastners = and found them from:

 

Johnson Aerospace

28294 Constellation Rd.

Santa Clarita, CA 91355

661-702-9949

 

I spoke with Margo = Bryant. 

 

The part numbers are:

 

CA1820-2

CA1810


Good luck.

 

Bill Burger
 

 

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