---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Fri 04/23/04: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:52 AM - Re: Horizontal stab question (At7000ft@aol.com) 2. 06:23 PM - T-88 Temperature Limit (baileys) 3. 07:19 PM - AN latches (Jim Cooper) 4. 07:45 PM - Re: AN latches (DJ Vegh) 5. 07:47 PM - Re: AN latches (DJ Vegh) 6. 09:04 PM - Re: T-88 Temperature Limit (Rcaprd@aol.com) 7. 09:09 PM - Re: Horizontal stab question (Rcaprd@aol.com) 8. 11:34 PM - Re: T-88 Temperature Limit (Clif Dawson) ________________________________ Message 1 _____________________________________ Time: 06:52:39 AM PST US From: At7000ft@aol.com Subject: Re: Pietenpol-List: Horizontal stab question Sounds like the bottom line is that the horizontal stab ends up parallel to the top longerons, no positive or negative incidence, correct? Subject: Re: Pietenpol-List: Horizontal stab question ________________________________ Message 2 _____________________________________ Time: 06:23:22 PM PST US From: "baileys" Subject: Pietenpol-List: T-88 Temperature Limit --> Pietenpol-List message posted by: "baileys" According to the System Three Literature the upper service limit of T-88 is 160 degrees F. I would guess that the internal temperature of a dark colored wing could exceed this especially when sitting still on the ground in the summer time. Has anyone experienced (or heard of ) the adhesive failing due to heat? Just wondering, Bob Bailey - Missouri ________________________________ Message 3 _____________________________________ Time: 07:19:12 PM PST US From: Jim Cooper Subject: Pietenpol-List: AN latches I downloaded the wonderful pics DJ Vegh took of his "flop". We're putting a "flop" on our GN1 Aircamper, and want to know what AN latches are. Apparently they are used to lock the flop in the down position. Where can I purchase AN latches? Thanks, Jim Cooper ________________________________ Message 4 _____________________________________ Time: 07:45:59 PM PST US From: "DJ Vegh" Subject: Re: Pietenpol-List: AN latches I used Aircraft Spruce part number TL800G Latch TL800-5 Strike I can provide some detailed pics of the latches installed if you'd like DJ Vegh N74DV Mesa, AZ www.imagedv.com/aircamper - ----- Original Message ----- From: Jim Cooper To: Pietenpol-List Digest Server Sent: Friday, April 23, 2004 7:16 PM Subject: Pietenpol-List: AN latches I downloaded the wonderful pics DJ Vegh took of his "flop". We're putting a "flop" on our GN1 Aircamper, and want to know what AN latches are. Apparently they are used to lock the flop in the down position. Where can I purchase AN latches? Thanks, Jim Cooper ________________________________ Message 5 _____________________________________ Time: 07:47:27 PM PST US From: "DJ Vegh" Subject: Re: Pietenpol-List: AN latches also... the actual name is DZUS latches... I have no idea why I called them AN latches... They are not an AN part number. I need to make that change on my website. DJ Vegh N74DV Mesa, AZ www.imagedv.com/aircamper - ----- Original Message ----- From: Jim Cooper To: Pietenpol-List Digest Server Sent: Friday, April 23, 2004 7:16 PM Subject: Pietenpol-List: AN latches I downloaded the wonderful pics DJ Vegh took of his "flop". We're putting a "flop" on our GN1 Aircamper, and want to know what AN latches are. Apparently they are used to lock the flop in the down position. Where can I purchase AN latches? Thanks, Jim Cooper ________________________________ Message 6 _____________________________________ Time: 09:04:48 PM PST US From: Rcaprd@aol.com Subject: Re: Pietenpol-List: T-88 Temperature Limit --> Pietenpol-List message posted by: Rcaprd@aol.com In a message dated 4/23/04 8:23:47 PM Central Daylight Time, baileys@ktis.net writes: << Has anyone experienced (or heard of ) the adhesive failing due to heat? >> Good question. I have never heard of any failures, but always wondered about that, myself. Chuck G. ________________________________ Message 7 _____________________________________ Time: 09:09:21 PM PST US From: Rcaprd@aol.com Subject: Re: Pietenpol-List: Horizontal stab question --> Pietenpol-List message posted by: Rcaprd@aol.com In a message dated 4/23/04 8:53:17 AM Central Daylight Time, At7000ft@aol.com writes: << Sounds like the bottom line is that the horizontal stab ends up parallel to the top longerons, no positive or negative incidence, correct? >> That is correct. Chuck G. ________________________________ Message 8 _____________________________________ Time: 11:34:40 PM PST US From: Clif Dawson Subject: Re: Pietenpol-List: T-88 Temperature Limit --> Pietenpol-List message posted by: Clif Dawson I went through this concern as well as my understanding was that it lost 1/2 it's strength at that temp. From their site- lap shear strength in maple-1800 psi. The wood let go. Doesn't tell us anything. Tensile strength of the film-7000 psi.Variation with temp on glued aluminum; 2500 psi @ 67 to 1000 psi @ 180 F. That's shear strength again but is that the shear strength of the glue? or simply the adhesion limit on aluminum? Shear strength for spruce is 1120 psi. So it appears that at 160 or so it would be a tossup as to which would let go, wood or glue. Up to that point the joint is going to be the same strength. Above it the glue becomes progressively weaker than the wood so it depends on what the specific load is on that joint. If it never sees more than 500 psi then it will do it's job until the glue weakens below that figure, at an even higher temp. What's the smallest gusset in the fuselage and where is it? If it was 5 square inches then the shear strength would be 5600 lb. If that joint will never see 1000 lb then it will probably be good at very high temps. If it sees 3000 lb then the failure temp will be lower but may still be well above anything that joint will experience. That's the way it looks to me anyway. Does it appear reasonable to you guys? Clif Subject: Re: Pietenpol-List: T-88 Temperature Limit > --> Pietenpol-List message posted by: Rcaprd@aol.com > > In a message dated 4/23/04 8:23:47 PM Central Daylight Time, baileys@ktis.net > writes: > > << Has anyone experienced (or heard of ) the adhesive failing due to heat? >> > > Good question. I have never heard of any failures, but always wondered about > that, myself. > > Chuck G. >