Originally Posted by egraham
Does this sound reasonable ?
2009 Chevy Silverado 1500
AS Interational Serenity 28 RQ
GAWR Frt. 3950
GAWR Rear. 3950
Weight #1 WD Activated
Drove off scales and back on:
Weight #2 WD bars unloaded
Drove off scales dropped AS and back on:
TV Weight = FA3+RA3. 5920
Gross Combined Weight= Fa1+RA1+TT1. 13280
TT Weight= GCW-TV Weight 6860
Tongue Weight= (FA2+RA2)-(FA3+RA3) = 860
Airstream says the Tongue Weight on my trailer dry is 950 ???
Did I do something wrong?
Also, if I add tongue weight to TV weight (5920 + 860) I get 6780 so Looks like I am under
My GVWR by 220 . I assume that means I am in good shape as to payload?
My Opinion -
1. Tongue weight is the force exerted on the ball of your hitch by the trailer which is not the same as the force exerted on your TV. "Tongue weight" is a concern for two reasons - the rating of your hitch, and the balance of your rig. I don't know what the tongue weight rating is, so I can't comment on that, but as for balance it is recommended that the tongue weight be between 10% and 15% of the TT GVW. Now, there is a difference of opinion as to whether it really means tongue weight, or the apparent tongue weight as measured at the TV axles. Assuming your TT weight of 6860 is correct, that is 686#-1029#, so you are within the recommended range either way.
2. Was your trailer dry when you weighed it? Depending on the location of the tanks, tongue weight might decrease with tank fills.
3. What would seem to be important is the condition of the combination when towing. Measurement #2 allows calculation of the actual tongue weight, but I'd calculate the TV GVW by adding FA1 and RA1 which is 6860, still within your GVWR.
4. Similarly, I'd calculate GCW by adding all the #1 weights for a total of 13,280.
5. To calculate the TT weight, you need to weigh the TV (in case 1) with the hitch on the TV, not as Propride users typically unhitch by pulling the stinger. Otherwise, assuming the TV is carrying the hitch, to calculate the TT weight you need to know the weight of the hitch. I don't see that you described how you unhitched, so I can't say how I'd calculate the TT weight.
6. Finally, did the conditions during the weighs include everything you plan to carry when traveling, e.g. passengers, full fuel tank, dogs, clothes food, etc. If not you'll need to account for anything that wasn't included, or load up and re-weigh.
There is a wealth of information on here about how to weigh. Search for CAT Scale weights and you should turn up a lot of posts.