"Flexible temperature" of what? You'll have to rephrase the question so that it makes sense.
The average aircraft will have temperature gauges for the following: Outside air temperature, Engine air inlet temperature, Engine exhaust temperature, cabin temperature, and that's just on a small aircraft. So which temperature gauge do you mean?
To "propel" the aircraft through the air.
There are two types of air temperature measurements on aircraft, Ram Air Temperature and Static Air Temperature. (slower aircraft don't normally have RAT gages) Ram Air Temperature, sometimes known as Total Air Temperature, is the air temperature outside the aircraft increased by the heat resulting from the compressibility of the air. The faster the aircraft, the more the rise in the temperature. Static Air Temperature, also known as Outside Air Temperature, is a temperature reading corrected for the compressibility rise to give a true outside air temperature which is used in all sorts of calculations relating to engine performance, aircraft speed, etc.
mercury is flexible because its liquid at room temperature.
There are are many powerplant instruments in aircraft. Oil pressure and temperature, jet pipe temperature, revs etc.
Yes, temperature is a state function.
This controls the engine speed
Jay Loftus has written: 'Motion simulation of flexible aircraft'
For the majority of applications, ABS can be used between −25 and 60 °C as its mechanical properties vary with temperature, at which it becomes flexible.
Elevators are flight control surfaces, usually at the rear of an aircraft, which control the aircraft's pitch
HFH
aluminum is strong and light and the refridgerant regulates temperature.