I found it quite easy to determine that the ‘f’ in `cl(f)`

means front and the ‘r’ in `cl(r)`

means rear.

These coefficients seem to have a purpose for 4 wheel vehicle or motorcycle design with reference somehow to the front and rear wheels.

What was not obvious to me was the method of determination for the values of these numbers, but I think it is quite simple.

`cl`

= `cl(f)`

+ `cl(r)`

* All cl’s use the same reference areas input into SimScales Result Control Item.

I have not figured out the 2nd equation that we need to be able to figure out these two unknowns.

I believe the 2nd equation will have something to do with reference length because, and here is where I am just guessing, for these to have specific meaning with regard to a vehicle with a two point front/rear ground contact, the reference length should be the wheelbase and must have something to do with calculating `cl(f)`

and `cl(r)`

.

If you have a motorcycle with a side-car, and the sidecar’s wheel is between the front and rear wheels then you will have to resort to a more traditional force/moment results solution to obtain ratios for wheel loading.

I have not figured out where `cl(f)`

and `cl(r)`

have any meaning for aircraft use (unless it is on the ground ).

Can anyone confirm that I have ‘figured’ out `cl(f)`

and `cl(r)`

correctly, and what the missing 2nd equation is?

Thanks,

Dale