Re: Fuel System Rule Question

["John Burk" <joyseydevil@comcast.net>]

>Don's front engine dragster literally cutting itself<

His Lenco 2 speed had a sprag failure . After that incident NHRA mandated
drums be made of iron so they would blow at a lower speed or alloy steel so
they wouldn't blow . If a sprag fails while the  planetary gears are loaded
the drum spins 3 or so times the engine rpm . At 25,000 rpm the surface speed
of a 6"drum is 446 mph .