Scale power?

[BrianG]

Just idle curiosity, but people talk mostly about scale speed. We know that it is not simply a matter of model scale X model speed, but the square root of the scale X model speed.

So, it stands to reason that scale power (HP and torque) doesn't follow the same rule. I figure since both horsepower and torque are functions of weight, you'd find the ratio of the real weight to scale weight. Then, apply that ratio to your model's HP and torque figures.

For instance, my Ultra GTP weighs about 9lbs fully loaded. The "real world" car would probably weigh about 4500lbs. That's a ratio of 500:1. Plugging in a current value of 75A @ 18.5v in my setup gives me 1.8HP and 2.58ft-lbs of torque. Multiply those by the ratio of 500 gives me scaled up values of 929HP and 1290ft-lbs of torque. Judging by the way these models perform, those figures seem about right.

Any thoughts? Again, this is just speculation...