Finding the Right CV Spring for a Petrol Generator

[Sam Unkim]

Hi
I have a small petrol generator.
How Large/Long/Heavy would a CV spring need to be, to run it for four hours.
Ideally the spring being narrow enough to be hidden in a house cavity wall (7or8")

More generally, how effective are CV springs as energy stores

 

[gmax137]

What is a CV spring and how does it store energy?

 

[Baluncore]

How do you get petrol out of a CV spring ?
Does a CV spring generate petrol ?