they are pretty damn insane... if that thing had a cooling system that was up to the proper working order... that thing woulda lasted longer...

i also heard from multiple sources that when the 13b was still in R&D, they strapped it to an engine stand without a load and ran it at 28,000 rpm for 4 days and 4 nights... appanantly the test was aborted because the it was consuming too many Drums of Fuel.