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Old 11-27-2015, 01:01 PM   #1
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Which side is typically heaviest?

I'm not sure where to stick this question. Out of curiosity for battery placement, does anyone know which side of the Airstream is typically heaviest?

I have a 27ft fb with twin layout.
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Old 11-27-2015, 01:07 PM   #2
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I was almost certain when I read the title of this thread that I would see people voting or either the inside or the outside as being the heaviest.
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Old 11-27-2015, 01:08 PM   #3
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My guess would be the side with the fridge. But you have to factor in whether that weight has been balanced with equipment and millwork on the opposite side.
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Old 11-27-2015, 01:13 PM   #4
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And where the storage tanks are if they have anything in them., fresh water especially.
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Old 11-27-2015, 01:39 PM   #5
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Got a 25fb. You can load the fridge up with a lot of heavy stuff (beer bottles) also the adjacent wardrobe, the shower is probably not that heavy but on the curb side you have the kitchen and bath and all the cabinetry and walls plus stove, sink pots and pans and the overhead cabinetry. I'm guessing when unloaded the curb side is heavier but when you load up the fridge and wardrobe it may start to equal out.

I guess you could try driving on a CAT scale with only one side of the trailer on the scales each pass if they allow it.

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Old 11-27-2015, 01:44 PM   #6
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Our 2013 25FB and 2014 Classic share(d) the curb side rear tire having the heaviest load of the four tires by about 200 pounds when loaded for camping with full fresh water and propane tanks.

I have not had a chance to weight the 23D on my individual scales.
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Old 11-27-2015, 05:05 PM   #7
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Assuming your total weight (on wheels) is about 8,000 lbs, that's only 10% off of perfect balance. Not bad.
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Old 11-28-2015, 11:28 AM   #8
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I know for fact that our 2014 Classic FB unit is 90kg or 200 lb heavier on the curb side. I have also verified that the hitch weight of 540 kg or 1190 lb is unchanged whether the fresh water tank is empty or full.
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Old 11-28-2015, 12:42 PM   #9
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My hitch weight was measured at 960lbs and I'm about to remove the two 12v batteries from the front. Already don't have the spare tire up front. Thanks.
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Old 11-28-2015, 02:01 PM   #10
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I can't find the post, but I did see someone mention that they had gotten side-to-side weights done at JC. Their trailer was a 25FB or 27FB as I recall. They got it weighed when they brought it to JC for some service, and JC also pulled up records from when it was manufactured. Both sets of numbers were heavier on the street side.
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Old 11-28-2015, 03:33 PM   #11
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I have an Equalizer hitch for our 25 foot International.

On a level surface and sliding the equalizer bars over, the "curb side" needs more effort to slide over than the right side of the trailer.

So, I do find that there is a difference in weight distribution. The rear bed has storage under it. Tools in the front side opening holds plenty. Refrigerator... when freshly stocked is more weight. ALL on the curb side.

Maybe Airstream had several people taking a shower to distribute weight on its engineering study. If I am forced to think this over... an empty 25 footer is probably well balanced. The engineers forgot that most Airstream owners will put stuff into these areas.

Not the first time engineers were confused. Some used metric and US for landing a space vehicle on another planet. (Some of you will recall this fact.. to Mars.) It put the landing spot some feet below the Martian surface that time.

Maybe Boldaventure is onto something. The trailers are balanced when EMPTY. It just needed one giant leap for mankind to figure out that they only remain balanced... while unsold while sitting at the local RV Sales parking lot.
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Old 11-28-2015, 07:50 PM   #12
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All travel trailers are going to be off from one side to another.

What you need is the weight at each wheel, not each axle (to answer the question).

How important it will be is another thing. If you're running tandem axle trailer tires at max sidewall recommended pressure it won't matter much. (Front to rear changes in the trailer affecting TW percentage matter more than side to side; overall)

Use the scale with hitch both tensioned and untensioned to be accurate.

It's the load changes on the TV which matter as to best tire pressures. (Covers handling difficulties assuming no gross discrepancies with TT).
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Old 11-28-2015, 08:49 PM   #13
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Quote:
Originally Posted by slowmover View Post
All travel trailers are going to be off from one side to another.

What you need is the weight at each wheel, not each axle (to answer the question).

How important it will be is another thing. If you're running tandem axle trailer tires at max sidewall recommended pressure it won't matter much. (Front to rear changes in the trailer affecting TW percentage matter more than side to side; overall)

Use the scale with hitch both tensioned and untensioned to be accurate.

It's the load changes on the TV which matter as to best tire pressures. (Covers handling difficulties assuming no gross discrepancies with TT).
Thanks. So 100 lbs left or right won't matter match.
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Old 11-28-2015, 09:27 PM   #14
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My last weigh in was 600lbs heavier on curb side. I want to shift some of that weight, but not sure yet how yet, far more storage on that side. Still 400lbs under max weight for that side, but I don't have a per-tire weight. Simply shifting 100lbs would reduce the difference to 400lbs, that would make me feel better. Might offset part of that by draining the hot water tank when on the move.
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Old 11-28-2015, 11:21 PM   #15
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In our 2010 28' International, the reefer, shower, stove/cooktop, furnace, converter charger, water tank and half or not if our interior main cabin storage are on the service side (port side.) Then we also have our second pair of batteries under the L of the gaucho with the converter and hot water heater on the same side. Our tongue weight is also 1190, loaded for camping with 1/4 tank of fresh.

We'll be replacing our four 70 lb AGM 6 volts with a lithium bank weighing 84 lbs. unfortunately, this will remain in the port side, but it should take off almost 200 lbs of tongue weight almost 90 lbs if it from the overloaded port side.

We do the best we can to put heavier objects in the forward storage opposite the heavy side, but most likely not enough.

All tire problems we've had have been tread separation of the left forward tire. Once we lighten up a bit and since we also just upgraded to 16's and Michelin Ribs, I hope that'll take care of it.



Pretty clear that our heavier side is the service side, away from the curb.
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Old 11-29-2015, 07:53 AM   #16
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I think the numbers for the Classic's wheels are fairly close:

front...2034=====2042

rear....1921=====2062

This weighing is after replacing the standard six gallon water heater with a Truma 'AquaGo comfort' instant on water heater unit (which is right behind the street side rear wheel). That removed 50 pounds of water weight in that location and the new heater was 34 pounds lighter than the removed tank system.
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Old 11-29-2015, 10:34 AM   #17
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switz, which is curbside and which is streetside?
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Old 11-29-2015, 11:21 AM   #18
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I'm surprised

I would have thought Airstream would have bent over backwards to balance side to side, and take into consideration food and beer in the fridge, maybe even pots and pans on one side and clothes on the other.

From my experience, things are ALWAYS heavier on the side that I am lifting.
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Old 11-29-2015, 11:32 AM   #19
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Weights for our FC23FB:


Tongue785
Right Front 1260
Left Front1332
Front Axle2592
Right Rear1187
Left Rear1109
Rear Axle2296
Total Trailer5673
% Tongue Weight14%
Equalizer Hitch Assembly91
“Hitch Weight” on Receiver876

Normal Towing Loads
Full Fresh Tank
Empty Waste Tanks
Full Propane Tanks
Digital Scales (4)
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Old 11-29-2015, 04:46 PM   #20
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Thanks for the numbers, guys. Don't have access to my scale tickets at present.

Where to store all the canned goods on the kitchen floor available storage is about as far as any of this goes. Keep it away from the heaviest side.

Really, it's keeping the heavy stuff (appliances, etc) within a foot or two from outside of the axle/tire contact patch boundaries -- more or less -- that matters. Don't change the stem to stern balance.

Side to side has room to play with.

But it's the scale that tells the numbers. WDH engaged. How far off the torsional twist is well applied is what makes the WDH dis-engaged readings of interest. (Where cheap factory hitch receivers of today lacking the longitudinal bracing of yesteryear disclose inherent defects). It's possible to disclose a larger than expected change port or starboard.
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