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| a1 a2 a3 |
centre of gravity payload centre of gravity chassis and body centre of gravity |
All permissible centres of gravity height are bases on: | ||
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0,4 g transverse acceleration about 3° inclination of body not accounting the tipped limit and tyre deflection about 500 mm static radius of tyre for LR/NLR about 400 mm static radius of radius of tyre for TLR centre of gravity height will change if tyre is altered funiform distributed loads on the trailer deck for hanging loads and for tankers we recommed a suspension with thicker springs to cater for higher centre of gravity. |
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| Note: Brake calculation acc. EEC regulations is done by factor hr. This centre of gravity is not the same as in a calculation for suspensions, as hr means centre of gravity of the complete vehicle and is lower then centre of gravity height of the suspension. |
All permissible centres of gravity are based on max. capacity of the suspension. That means that the load on the king pin must be stabilized by the truck. The centre of gravity heigth is the distance between centre of gravity of sprung material and road. Thr sprung material is the total max. axle load minus unsprung material. Unsprung material means axles, rims, tyres, suspension and brake cyclinders. The percentage of unsprung material to the max. suspension capacity is about 10%. |
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