CG, TW, WB estimations - 9/2024

the damn preview isnt working… ill fix it later -

According to WSC book: determining CG TW and WB can be quite arbitrary. Finding the CG requires overall weight and wheelbase - these two things do not have an explicit method of calculation. They are typically just values estimated from pre-existing designs.

Goals:

• estimate overall new weight

• estimate CG

• estimate weight distribution across front to rear axles

• can get a rough est. of TW if the weight distribution w the assumed inputs are within our goal range of 60-70 front

I have estimated the CG and weight distribution of our new vehicle according to:

1. WSC average values

   1. gave us a range of typical WB

   2. gave us examples of calculating CG distribution

2. pre-existing daybreak weight values and dimensions - VDR

   1. battery weight - 30kg

   2. frame - ~187lbs

   3. 4.5 m length

   4. approx distance of significant masses from front axle

3. system specific goals for the new car

   1. frame weight reduction

   2. occupant cell relocation

   3. 3 wheel assemblies

4. regulations - give us a rough max and a min - regs

   1. battery - 30kg max

   2. max body length

   3. TW to WB ratio 1.5

my inputs:

MASSES:

Distances x from the front axle / nose: