QLDriver wrote:I still think that temperature corrected strain gages on the wheel studs would be a good way to be sure the wheel is attached. Given that the studs have a known Young's Modulus, multiply that by strain and area, and you have the load on the stud.
That would give a clear telemetry indication that the wheels are properly attached, which could be linked to the release lights.
Thats too messy in my opinion.
First problem is that there are not wheel studs but its the whole spindle which is loaded by the wheel nut.
Next issue is you also have differing bending moments on the spindle from team to team due to different wheel offsets. So you will need to put a full bridge (4 strain gauges) on the spindle to properly measure the strain.
Next problem is that the spindles are not simple uniform shapes which means the load isnt dependent only on the strain and the youngs modulus but also the shape of the part. Every team have a different design so either the spindles will need to be standardised, or each design will need to be calibrated to relate the clamping force to the strain.
Then, measureing strain on a rotating part is not such a simple matter. You need a battery pack, a wireless transmitter and a receiver to transmit the strain measurements from the rotating spindle to the car. Such things are available but its a lot of stuffing around to solve a simple problem.
My opinion is this should be solved with a simple procedure and without introducing unnecessary technological complications. I would bet 99% of the time a wheel is not on correctly, the guy on the wheel gun knows it. Every mistake like this that Ive seen in recent years, this has been the case. McLaren with Jenson, Red Bull with Mark etc, Renault with Alonso etc.
I have already mentioned this, but if the teams want to continue with the traffic light. Put the damn "GO" button for each gun man 2m away from him. Then he will never touch it until the wheel is absolutely on.