Search results

Jon, You are correct...no idea where I got stuck on "tin" rather than "oil canning"....my error...never intended to can food in the Hawk! B)...

Jasan, While I concur that seat of the pants solutions are truly a hit or miss proposition, as of yet I do not believe anyone has identified an application engineer that deals with this specific FWC problem....I do not discount the value of a methodical engineering analysis and testing...

Time will tell if anyone actually lessens or eliminates tin canning on a FWC that is as bad as on my Hawk....roof coating would have to be damn thick to hold down the top sheet from fluctuating/bouncing up and down in a wind...and 'sound proofing' will only come when the movement of the slack...

Thanks for that....resonating/vibrating produces sound, of course in varying frequencies and amplitudes...cause of that movement and how to stop or greatly lessen that movement is the crux for dealing with our TC in FWCs. If tops sheet only "quivered" the sound might be a hum, but the rapid and...

Craig, I used that sound damping material on the underside of the transmission tunnel in '62 Corvette after installing Tremec 6spd which initially had gear noise....worked OK but did not really stop trans noise; just lessened it. No bigee as I drive with top down and use ear plugs. Good for...

I will take another look at the sound dampening sheets/material referred to in these posts….my take is that lessening sound or temperature via these insulations to attenuate them is an entirely different proposition that stopping the long wave movement of the aluminum top sheet as it creates tin...

Vic...I have and continue to admire your ability to construct not just electrical systems but structural components. Not so much for me. If I can't "KISS" it, then my judgement is to leave it alone so I don't make matters worse. Removal of my top liner and doing the retro-fix you describe...

Thanks to all for chiming in....first, I experimented with laying a rigid weight "east/west" [laterally] at 90* to top frame members....did not work, since frame to top sheet areas under that brace were at the frame height and top sheet had 'troughs' and 'peaks' below that frame to frame level...

Thanks Pat...shipping costs are through the roof for 6 foot lengths....nominal cost for 2"x1/4" is $6+ per foot....right now Amazon seems the best bet... Question for Collective Wisdom: Is the bar length or the bar weight the most significant factor in reducing tin canning ? Perhaps there is...

Take that to FWC... Regardless of the 'why', right now my money is on weighting down the loose/distorted sections on the top sheet between the top longitudinal frame members...I will try aluminum bar, unless someone has a better idea of how to lessen or stop the TC.

New Information: First FWC says that tin canning almost always is associated FWC that have had a snow load. Take that at their word. I guessed that the top sheet on my '16 Hawk is about 88 sq/ft.....using the table in this article [scroll down for chart] you can see that any appreciable snow...

Question: Those you with tin canning noises and with a single top sheet....have you ever had a snow load on that roof? Thanks...Phil [Reason for question to follow.... B) ]

Good thinking by many on this...would add that wind direction varies as does velocity during the tin canning.. My experience although not well defined is that wind coming from a frontal direction cause more tin canning that from abeam. No hard data points. Hatching a plan to put lateral flat...

Capt. Call a business or USFS in the area to be visited and ask them about air quality...here in NE Oregon air has cleared up but changes day to day and fire season just ramping up...

What do you folks think would this work if placed on top sheet? Only adds 3.6 lbs. Had to laugh from this vendor; 12' only $15.14 but shipping $747, Texas to Oregon....similar on Amazon for less. Flat ‐ Aluminum ‐ AF.125 X 2.00 X 12' Enlarge Flat » Aluminum Product Name: AF.125 X 2.00 X...

OK...but replacing the existing single sheet smooth top sheets with a corrugated one is not feasible...and I do not believe ATC tops are one piece...could be wrong. If FWC smooth top lacks sufficient rigidity how do you dampen the tin canning? I am not by any means an engineer but it seems...

I really doubt that there is a "rebuild" solution that is feasible. Not just in terms of numbers and time but honestly how would they be 'repaired'? New top sheets securely glued or screwed to aluminum frame? Like I posted a long time ago my position is that this now my problem to deal...

Regardless of the "mechanism of injury'....the method of attaching the top sheet to the struts/rafters/top frame failed; VHB has not held. If the top sheet was truly held down, the bubbling and tin canning would not occur.

Yes...I can also push my top sheet down over the roof struts....definitely not attached...'16 Hawk

What do you suppose those diagonal lines of dimples are caused by?

Paul what you have should lock down the top sheet to the frame and prevent all or most tin canning: 3 full width transverse bars on rear rack, 2 vents fastened to struts, middle solar panel with 6 fasteners to frame struts and forward bar with 8 [?] fasteners to top frame arranged...

Thanks for the photos and suggested aluminum stiffeners....what is the thickness/width of that aluminum strapping?..My guess it that even if used transversely it will not add a lot of weight..I am too old to start a gym program to lift a heavier top! Too bad VHB was not used transversely. No...

Stan, Hello Phil Sorry for the delay. We have been on the road for the last week at the Overland Expo in Flagstaff, AZ. You wrote: << How is the roof panel secured to the frame? >> All of the one-piece smooth aluminum roof skins are attached to the aluminum roof framing with 3M VHB double...

Close but ...but water is compressible [ surface sea level responds to atmospheric pressure changes]; just not much B) While of course gases are compressible...deferential heating of a pipe/manifold with the air trapped by ice 'plugs' could cause the air to expand and rupture the material...

Paul, I do not know what the FWC "cargo racks" look like but your description sounds like they indeed buttoned down the top sheet. Two racks? Front and rear? If I read this correctly you have 5 transverse 'bars' pinning the top sheet down...fore and aft. My FWC Yakima rails are longitudinal...