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Does anybody know how to work out scale weight for a slot car, I think you take the original weight of the car and then divide it by the scale (32 for a 1:32 car) three times, for an early Impreza this gives a weight of about 37 grammes.
 

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Volume is length x width x height.
In 1/32 scale volume is scaled by 1/32 length x 1/32 width x 1/32 height = 1/32768

Mass is volume x density
Weight is mass x acceleration due to gravity

To give an answer, it needs to be decided how to scale density and the acceleration due to gravity
If for example you decide both should be scaled at 1:1, in 1/32 scale weight is scaled by 1/32768.
(Depending on what you are trying to calculate, 1:1 may or may not be correct, and is probably where the disengagements start)

So your 900kg Le Mans car scales to around 27 gms. Way under what a slot car weighs.
And what does that tell you?
Perhaps it tells you the thickness of the bodywork is way over scale so it doesn't crumple when you pick it up.
Perhaps it tells you the full size car doesn't have an electric motor with an iron armature stack about 16 inches / 40 cm in diameter.
Perhaps it tells you the slot car doesn't have tyres inflated with gas to support scale thickness rubber walls (about as thick as a couple of sheets of paper).
 

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Yes people have come up with other answers.
There are a number of different answers that are equally correct, it all depends on what they are wanting the "scale weight" to tell them.
Probably a load of complications you don't need?
 

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Volume is the 3 dimensional quantity, weight is a force acting in one direction.

Scale weight distribution?
In a sense weight distribution is weight distribution - scale doesn't come into it. If 60% on the slot cars weight is on the rear wheels, its still 60% if you multiply the slot car's weight by 32768 - or any other number.

However there is an important difference.
Full size cars don't have any weight on the guide. (Obviously - they don't have one).
Slot cars do have guides and at least some contact pressure on the braids is necessary for pick up. Indeed some slot cars run best as a "tripod" with all the weight shared between the guide and the two read wheels.
So the weight distribution of a full size car and a slot car are not really the same thing.
 
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