Small scale testing anyone?

[bandit86]

I thought of this for use with the bigger plastic diy kits
https://www.facebook.com/supercarblo...40aB7S9Ucbxw6v

[freebeard]

Does Facebook still keep a 'shadow profile' on people who don't use it?

Anyways, wind tunnel testing? A scale of 4 or 5 to 1 is necessary for fidelity in the result (Reynolds Number). Plastic kits tend to be 8:1 or 10:1 at best.

If it's a water tunnel, then okay.

[aerohead]

multiply 22-mph by the 'scale' to get the proper air velocity required to achieve the necessary Reynolds number and necessary turbulent boundary layer.
EXAMPLE: 1:24-scale requires 24 X 22= 528-mph test section air velocity, however, that puts you in 'transonic' flow with shockwave drag, wrecking any chance of learning anything useful.
Carmakers start @ 1/4-scale, then enlarge models as designs are culled in the tunnel, leaving only more promising shapes for the more expensive models ( $ 68,000 for 1/3rd-scale, in 1988 Dollars ).