Originally Posted by RickB
Been thinking about why the deployment speed is so low relative to the speed where its "required" to keep the car stable. Most aerodynamic forces are a function of the velocity cubed, so a 40 lb force at 60 mph would be near 320 lb at 120 mph. Looking at the size of the motor that raises the spoiler, I don't think it could move the unit with a 300+ downforce acting on it. The speed appears to be set to allow the spoiler motor to raise and lock the unit while the forces are still low enough to allow it to operate. Once in the upper locked position, the motor is no longer required.
rick,
quite possibly you have provided the explanation to solve the real reason for the deployment setting! It also may shed light as to the fixed srt version...it is not worth putting a activated wing as the speeds are potentially greater. (of course for the SRT price tag they could of put a stronger motor)
That is assuming your aerodynamic calculation is correct.