The type of application that the spring is to be used in will of course determine life expectancy, performance requirement and, depending on what the life expectancy might be, the type of material used. A typical application for a compression spring in an engine valve might involve 8,000 cycles per minute and the best material to guarantee this sort of performance is chrome silicon.
Chancellor backs third runway at Heathrow
The decision to develop LHR plus LGW and Luton will reinforce the need for travel to/from these locations from elsewhere in the country. Has any real...