#### Probability

##### Junior Member

- Joined
- Jan 26, 2012

- Messages
- 200

I'm not a mathematician by any stretch of the imagination hence why I asking if this is at all possible, which it must be as car manufacturers do it!

Angle tighten a bolt and you either get an angle in degrees to work to, or a torque in Newton Metres to torque the bolt to. This now is not always the case you can be given a angle torque only.

You might then ask, why the is the problem with that?

Lets give a real example.

Customer asks for a diagnosis on an engine over heating, you diagnose the cylinder head gasket leaking. You repair the engine and a few weeks later the car returns with the cylinder head gasket leaking again!

You dismantle the engine and find that the 'clamping force' the manufacturer recommended in angled degrees seems to be incorrect. Further investigations on the engine find the cylinder head gasket has not properly been compressed, thus leaks. We contact the manufacturers agent who advises the only information available has been given and we now struggle to find the correct torque data, and given that the manufacturer only gives an angle measurement we cannot compare that to any torque figures!

This then brings me to my question and the formula T = Fr sin (theta)

I'm given an angle measurement 75 degrees. My tool length is 2 m, which is the radius, the force is applied from my arm, which is unknown, thus the torque applied is also unknown.

How then would this problem be solved with two unknowns?

Thank you to anyone who can help me solve this.