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Unread 05-29-2013, 10:23 PM   #1
Krazman
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Cab cover for use when towing?

I did a search but didn't find a thread on this. I have a 2-door JK and looking to know if anyone has used a cab cover when flat towing. We sometimes tow the jeep behind the RV and would like to throw the tube doors on this summer but it would be nice to keep some of the rain and road grime off the interior when towing. However, I don't want a cover that is loose or flaps in the wind and chafes the exterior.

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Unread 05-29-2013, 11:21 PM   #2
2Five22
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I've seen covers that protect the upper portion of the cab, but never one that covers rock doors. Perhaps a custom awning place could make one for you.
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Unread 05-30-2013, 08:26 AM   #3
T00THD0C
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Why not keep the top and doors on until you get where you're going, then put the tube doors on.
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Unread 05-30-2013, 09:10 AM   #4
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I have the Bestop 81041-09 Charcoal All Weather Trail Cover for my 4 door and I know they have them for 2 doors as well. Mine straps to the undercarriage on the sides and the back. The front just slips down to the bottom edge of the windshield. You may be able to punch some grommets along the edge so you could fasten the front. It's a very heavy fabric, actually heavier than what I was expecting for my intended use but it might hold up to being towed.
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Unread 05-30-2013, 02:06 PM   #5
jwmbishop
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The problem with open market covers is that they are made to be easy to put on and take off with several different top choices (ie hard or soft factory, bikini, bimini etc). This makes them poor choices for towing as they will flap and chaff simply because they are not tight and do not control air flow THROUGH the covered vehicle...

I had a tow cover made that goes around the cowl a full 4 inches ahead of the windshield (also covers the grate in the cowl to stop air from going into the cabin through there) and all the way down the sill line. The bottom cinches in 6 places down the side, sealing to the splash panels and the back is vented. This causes the air pressure to push the cover to the metal - while the venting allows the LOW air pressure inside (caused by the vacuum behind the vehicle while moving) to seal the sides. No flapping - but must be put on in a specific manner so throwing it on while on trail and caught in a downpour is not as easy as the besttop for example. Doable but I am always the last of the group to be covered - by twice as long as the next to last! Fair trade off though... mines the only one I have seen that tows without flapping.

The guy that made it for me specializes in boat towing covers... and just followed the same logic there - seal the front against air entry, keep the sides tight over the top and back vented and let the air do the work - and took about a week to custom cut all the pieces to hit all the exact points needed to accomplish. Not cheap though at 950 - but the fabric is super lightweight and marine grade for high UV protection. When trailered at 70 the cover looks like its vacuum wrapped to the Jeep - no flapping or chaffing! Not sure about how well it would do in the vacuum behind an RV though... my trailer DOES have a big box on front - but its no taller than the hood so the windshield is still up in a very high pressure area.
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Unread 06-03-2013, 08:02 PM   #6
augichef
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Not sure if this would work my cover has wide straps with metal locking hooks to tie it down.

image-223715588.jpg

Here you can see how it goes past the corner lights unlike other covers


image-2502455856.jpg


Here is how far down it goes over the windshield
image-987845659.jpg

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Unread 06-04-2013, 07:13 AM   #7
jwmbishop
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Quote:
Originally Posted by augichef View Post
Not sure if this would work my cover has wide straps with metal locking hooks to tie it down.
Where the windshield and cowl join is an EXTREMELY high pressure area while moving forward. When the cover ends anywhere on the WS or just at the bottom of it - that high pressure will lift the cover and allow the air flow through it - causing the ballooning and flapping. To make that cover non flapping would require adding about 8 inches so that the the fabric comes down the windshield and onto the cowl - that way the high pressure forces it to seal rather than lift. Thats the whole key to a towing cover! - no air in from front - only air out at the back. The air pressure difference (high outside - low inside) seals it!
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Unread 06-04-2013, 07:30 AM   #8
augichef
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I'm sure there could be a way to add fabric to my cover not to mention there is a center strap on the bottom of the windshield fabric. There you should be able to slide down into the engine compartment and strapped down to stop it from moving. 175 for the cover maybe another 60-75 in extra fabric and sewn, so just under 250.
So with the strap and extra material could this work? Hmm gears are turning now..
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Unread 06-04-2013, 09:03 AM   #9
jwmbishop
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Quote:
Originally Posted by augichef View Post
I'm sure there could be a way to add fabric to my cover not to mention there is a center strap on the bottom of the windshield fabric. There you should be able to slide down into the engine compartment and strapped down to stop it from moving. 175 for the cover maybe another 60-75 in extra fabric and sewn, so just under 250.
So with the strap and extra material could this work? Hmm gears are turning now..
Augi
You are heading in the right direction! Just 6-8 more inches in front of existing hem should do the trick (and accommodate pockets for the lights to be covered as well). Rather than go fwd to engine compartment go AROUND - as far fwd on the added flap as you can and straps down to frame. This will allow you to pull it tight down to the cowl and keep air from getting under (but be careful that you have no space at the side fronts - I had to go under between the rock rails and splash sill to get the side gapless). Magnetic strips work to help keep the seal down the sides if you can't strap it sealed.

The best ideas are usually discovered while driving down the road. Look at how soft side trailers (like Lexus uses to deliver) are sealed in and secured! Then compare that to the guy driving with a tarp flapping. Spot the differences...
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