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Old 07-06-2015, 12:18 PM   #1
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Mounting a Generator on Rear Bumper AS 25FB

We recently acquired a 2014 Flying Cloud 25FB and will be towing with our 2007 Jeep Grand Cherokee Diesel (so far it tows great and at 16 MPG!).
My question has to do with the possibility of mounting a small 3600 Watt Ridgid Generator (130 lbs) on the rear bumper because carrying the generator in the back of the Jeep means inhaling gas fumes before the TV gets moving.

Is it possible to mount a generator on the rear bumper?
If so, any suggestions on do's and dont's?

Thank you for any suggestions!
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Old 07-06-2015, 12:25 PM   #2
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how about a 265 lb 7000 watt Honda???
I understand it will change the tongue weight ..

would that be significant on a 30 foot dual axle trailer???

thoughts please

currently I haul it in my cap on the pickup but that takes up a lot of room for junk and all kinds of treasures I find along the way...
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Old 07-06-2015, 12:34 PM   #3
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I assume you mentioned that specific make and model of generator because you already own it and aren't interested in replacing it with a lighter-weight generator that is less likely to damage the trailer as you hit potholes and bumps in the roadó or a propane-fueled generator that you can carry in the Jeep because when you shut off the flow of propane there are no fumes to breathe.

The ideal setup might be a lighter-weight propane-fueled generator mounted on the trailer tongue and tapped into the propane cylinders you already have on the trailer; and counterbalanced by a ballast load inside the trailer behind the axles (you can use stuff you normally carry in the trailer anyway as ballast, by changing where you carry it) so that you don't exceed the maximum trailer tongue weight for the Jeep.
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Old 07-06-2015, 01:06 PM   #4
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Given all the expressed concerns on here (search bicycle mounting threads) about mounting 40# of bicycles on the rear bumper and the propensity for shell separation at the rear, I think I'd stay away from something that heavy.

That said, a friend here locally with a nearly new 25' (FC, I think) has two Honda eU2000i generators, one on each rear corner. He bought the trailer from a guy who has a metal fabrication business. I took a quick look at the mounting arrangement and didn't see any reinforcement. But that is still only about 2/3 of the weight you propose. I'd be concerned that much weight would cause problems bouncing down the road.

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Old 07-06-2015, 01:58 PM   #5
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I would not mount anything heavier than a bicycle on the rear bumper of an Airstream trailer.
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Old 07-06-2015, 02:43 PM   #6
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The rear bumper is not designed to independently carry that much weight; Airstream sells a bike rack that attaches to the bumper AND shell limited to about 70 lbs of bikes.

The Airstream tongue is limited to 1,000 lbs total hitch weight (it's in the Owners Manual) so it might be possible to keep under that weight total but not likely. Unless you removed the Airstream spare tire and bought AGM batteries (can be used inside without ventilation) and moved them near the rear axle (with some rewiring).
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Old 07-06-2015, 03:03 PM   #7
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Not a good idea.

Too much weight, too far back from the axles. Not only will this affect the tongue weight, damage the frame and eventually lead to rear end body/frame separation, but it could also negatively affect the towing experience. If your concern is principally the fumes in the tow vehicle, I would get a propane generator. That is what we did.
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Old 07-06-2015, 03:08 PM   #8
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Thanks everybody for the words of wisdom. I do own the 3600 Watt Ridgid Generator so I have to make do.
Unfortunately, there is no Propane conversion kit for the Subaru EX21 engine that comes with the generator.
Mounting the generator on the front or back bumper of the Airstream seems out of the question (weight, bouncing damage).
I am thinking about carrying the generator inside the AS (behind the rear axle) while in motion, secured with web straping and unloading to the ground when we park for the night.

Any further thoughts from the group? Thanks!
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Old 07-06-2015, 04:54 PM   #9
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Sounds like a decent plan. Always best to load anything heavy above or near the Airstream's axles and centerline for best handling and balance. Note that Airstreams builds them with fridge, range, storage tanks, kitchen grouped on or near the axles and balanced side-to-side.
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Old 07-07-2015, 07:34 AM   #10
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I second Doug's thoughts. If you can, position the genny so that it's weight will be over the axles as much as possible. There is limited, if any benefit to placing it behind the rear axles. Some might argue that if you wanted to get sophisticated with weighing the trailer, you might be able to position the genny so that it helps overcome some other weight imbalance, but the simplest thing is to place it over the axles so it becomes essentially a neutral element.
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Old 07-07-2015, 08:32 AM   #11
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Im not sure how large your generator is but I carry mine with a 1 gall gas can inside my Suv inside a plastic bag inside a large tupperware with lid. This helps cut down on smell/fumes.
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Old 07-07-2015, 08:39 AM   #12
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Quote:
Originally Posted by phawk33 View Post
Thanks everybody for the words of wisdom. I do own the 3600 Watt Ridgid Generator so I have to make do.
Unfortunately, there is no Propane conversion kit for the Subaru EX21 engine that comes with the generator.
Mounting the generator on the front or back bumper of the Airstream seems out of the question (weight, bouncing damage).
I am thinking about carrying the generator inside the AS (behind the rear axle) while in motion, secured with web straping and unloading to the ground when we park for the night.

Any further thoughts from the group? Thanks!
Options?

How about a "front receiver" on the tow vehicle and an aluminum cargo carrier from harbor freight.
That's how we do it!

-Dennis
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Old 07-07-2015, 10:16 AM   #13
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Quote:
Originally Posted by batman View Post
Options?

How about a "front receiver" on the tow vehicle and an aluminum cargo carrier from harbor freight.
That's how we do it!

-Dennis
As with the trailer, when you add weight beyond the axles it can be a stability problem. The momentum of the extra weight out there in even a slight sway condition makes it a little more difficult for the front of the truck to return to a straight line. And the effect of the weight is increased by its distance from the center of the axles. Best to center loads when possible.
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Old 07-07-2015, 10:23 AM   #14
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Quote:
Originally Posted by batman View Post
Options?

How about a "front receiver" on the tow vehicle and an aluminum cargo carrier from harbor freight.
That's how we do it!

-Dennis
This probably transfers more weight than a WD hitch, as a bonus.
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