%%EOF Those calcs look impressive brother, These are the rules, longer draw bar, just enough tongue weight to be able to lift empty, good tyres pumped up harder than normal, I run about 45 psi.

This measurement doesn't include the trail tongue.Calculate the center point of the two axles by multiplying the trailer's length by 0.6. Placing the axle too far forward could remove too much tongue weight, possibly creating a dangerous, hard-to-control sway when towing. To determine trailer axle position, we must first understand what drives the decision. Good luck.hello MR. mechanic , i have a trucks and trailers spare parts shop and i wanted to know the main component of the trailer so i can have a basic idea if you can ,Hi I have a question, I got 60’ frame it was from amobile home three axels were in the frame I cut 20 feet to the back of the frame cuz I want To make a Tinay home on it, my question is now I need to move the axels since they were place for a 60 feet frame now its only 40 feet frame how can I calculate to where to move the axels now? When checking for ‘The Pivot Point’, owing to the fact that the wheels and axles are ‘supportive’ weight, and not ‘load’ weight, should they be on or off the trailer, when finding the ‘Pivot Point’? In severe cases, a crash can result.If there is significant tongue weight (above 10ish %) gravity serves to settle things back to stable. Now, as you drive your car goes over a bump. You don’t want that with your trailer because it adds to instability.Hi Jay, how does the 6″ set back theory work in practice, do the trailers, your company produce, perform alright? The ideal tongue weight is 10-15% of the trailer's total mass. Thanks.Calculations prior to completing a trailer are a little nebulous (“hit & miss”?) Thanks.Ok..maybee this was discussed in previous comments but I am new here and I feel my issue is unique…I have a tilt body trailer with a cargo area of 5×10..when trailer is empty it would sway almost out of control..I would drive my golf cart on (forward) and it would still sway..I back it on and no sway. For example, if you mounted the wheels as far to the rear of the tray/deck as possible, that would surely give a much different pivot point to, if you were to mount the wheels as far forward of the tray as possible, right? I can’t pretend my head’s not spinning, I’m just a simple meat worker. Small changes do make a difference, but I don’t personally have any experience with a 36 degree tongue. It is extremely helpful. Make a long bolt, or just the right size fastener. 1. In bad cases, it is very unnerving. This can be confusing, I know. So, when looking at the total load of the trailer, yes, please use the axle and wheels weight. This balance is important to maintain the correct downward force at the tongue. Unhook the trailer on the scale so it measures the full trailer weight (tongue and axle).

Everyone seems to think not enough tongue weight: Should I move axles both or forward? This technique works well when you have a defined load for the trailer — like a boat, for instance.That said, using the measurement technique can help when setting bigger loads like a battery pack or water tank for a We can also calculate tongue weight and trailer axle position. )If it’s more about centre of mass location, is the primary factor the distance from the axle, or distance from both primary pivot points (axle & coupler)?As a thought experiment to illustrate my question, let’s imagine an 8′ utility trailer with an axle set a little back from the centre of the bed, with a tongue length of 4′, loaded evenly, with a result of 15% of the weight being on the tongue at the coupler.

(Edit, new article on tongue length is Leading me further down that thought experiment was helpful.
This is where you want the center of the axle set to be — based on % tongue load you chose above. I was looking at a trailer design with a 36 degree A frame coupler and calculating that changing the A frame coupler angle to a commonplace US 50 degree version reduces the length significantly but only has a small impact on tongue weight. Center of tandem axle spring assembly bolt is at 5’2” from back of frame (40%). I figured load c.o.g. h�bbd``b`�$�AD5�`; $��A�1q�� ��"΂�k �Y �@�;$f$����@1�خ����� d100�F�g��` u1 2 . Using the same 10-foot cargo box as our previous example, we would make a mark four feet from the back of the trailer. Proper placement of trailer axles can make the difference between a trailer that tows safely and easily and a trailer that is a danger to everyone around it anytime it is being towed.


You are correct the 33% is for empty frame only with no load.

I think it would work great if you always turn Left. Good luck.Thank you for the quick response. Thanks.Axle placement for tandem axles on a gooseneck or fifth wheel trailerFor tandem axles, use the center of the axle group with these same equations. White has a Bachelor of Arts in computer science and a diploma in home inspection. Helpful Expert Reply: There is an easy way to determine axle placement on a trailer. The distance from the very front of the trailer, the coupler, to the center of the trailer axle measures 96 inches. Just make sure you have the right materials and And now you have the trailer axle position figured out, we invite you to read A Tap and Die set is a near must for a DIY fab shop. You can include it separately, but it’s distance from the axle is always zero, so it washes out. Once these weights are determined you will need to add the two numbers together to get the total weight. Firstly, you say the wheels and axles are part of the ‘supportive’ weight, so their weight can be ignored.

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