riff raff
just a hypothetical question
How many gearboxes would you have to run and for how long under what conditions
to demonstrate a catestrophic in service failure rate of < 10^-9 per hour?
etudiant "As you point out, that minimizes the cost and maximizes the test flexibility." minimising cost !
"focus on the component that failed, rather than the entire assembly."
so if you wanted 10^-9 for the gearbox and there are 20 planet gears then would they have to be better than 5x10^-11 /hr reliable eh?
how would anyone ever establish that? is it even possible?
what is the acceptable catestrophic failure rate for a gearbox? is there one?
Last edited by AnFI; 8th Nov 2017 at 18:49.
Reason: maths