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Old 03-18-2012, 01:16 PM   #11
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Tonneau cover

Got the frame work pretty well finished, will go pick up the plywood and start covering the framework. The front section will be semi permanent mounted and the rear section will be removable and somewhat lockable. DW will paint the whole thing black and if it works as intended, will either have it covered with naugahyde or cover it myself.
With the Sidewinder not swiveling at the fifth wheel, I will also attempt to use naugahyde to make a flexible sleeve around the forward portion of the pin box and snap it to the cover to block air from going around the pin box on the sides and rear and under the rear section. That may be the biggest challenge as I will not drill any holes in the pin box and possibly void the warranty. Hopefully will be able to use the existing holes in the pin box and make a clamp of some sort if necessary
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Old 03-19-2012, 09:23 PM   #12
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Here are pictures of the tonneau cover in progress. After I design, build and install a flexible to cover from the pinbox down to the cover, DW will paint and we will take the whole rig out for the cover & fifth wheel on their maiden voyage. If the cover works, will either have it covered in black naugahyde or buy the material and cover it myself.

Forest River Forums - dunnnc's Album: Tonneau cover for Fifth Wheel
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Old 03-24-2012, 07:21 PM   #13
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Well, I ended up splitting the rear section right behind the cutout and made a moving cover that hinges on the rear and rides on the wedge on the pinbox. Will take everything on the maiden voyage Mon, 26Mar2012. If the tonneau cover works, I will either have it covered in naugahyde or cover it myself. If it works, it should eliminate air hitting the tailgate. Thinking of a deflector of some sort to funnel the air off the tonneau cover down off the rear of the tailgate in under the trailer.
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Old 03-24-2012, 09:00 PM   #14
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I work at a parts house and we sell a brand of tonnue covers called truxedo very high quality covers they can make most any configuration that you need all the need is measurements check out their website
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Old 03-25-2012, 08:24 AM   #15
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Have not found any manufacturer that makes one that covers the entire bed when towing a fifth wheel. I have an Undercover that covers the entire bed, but didn't want to modify it, so after spending several hrs searching the internet, decided to just fabricate it myself.
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Old 03-25-2012, 10:43 AM   #16
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I've been following this thread, but I'm still wondering. What is the goal for this project? I noticed you stated above "it should eliminate air hitting the tailgate", but what is your ultimate goal?
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Old 03-25-2012, 10:49 AM   #17
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That is the ultimate goal, eliminating the air hitting the tailgate and hopefully get a small benefit in gas mileage as well as discouraging inquisitive minds from tampering with the 5th wheel connections while stopped for meals, shopping etc. Also like to have the bed covered after unhooking at a campground. We spend 1-3 months "snowbirding" in FL and couldn't figure out how to take our Undercover tonneau with us. Just don't like open pickup beds.
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Old 03-25-2012, 05:33 PM   #18
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Ready for the maiden voyage tomorrow morning. Should know before noon how everything works as far as towing with the Reese Sidewinder activated and whether the tonneau cover helps. Will tow back home in 4 or 5 days without the cover and see how that works also, altho' we will never tow without the cover as we usually spend 2 to 3 days traveling to FL without unhooking.
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Old 03-25-2012, 08:08 PM   #19
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Not trying to be a smart azz but I would think the 12 foot tall shoe box your towing would effect mileage more than air hitting the tailgate... but necessity IS the mother of invention. I've heard of people worrying about folks tampering with hitches while on the road. Does that really happen? I use the pad lock that came with my hitch, but I use it for piece of mind that I ensured the hitch was closed and there's no way I can drop my trailer. Not because I think someone will walk by and pull the handle, is that a real concern?
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Old 03-25-2012, 08:29 PM   #20
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Understand the 12ft shoe box being a great big mileage determining factor. We have been pulling camping trailers since 1976, so it is not our first rodeo. If the tonneau cover increases the mileage by .5 to 1mpg, at todays prices, it will pay for itself the first trip to FL. We also store a few items under the cover both while towing and when unhitched, and the most important part is I don't like open pickup beds.
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