Mondays weapons systems quiz
This should get the old grey matter turning over ...
(a) Sketch and label a CD versus Mach number plot for a typical bullet. What physically occurs at the Mach numbers for drag divergence and maximum CD? (5 marks)
(b) Distinguish between static and dynamic stability. What is the operating principle behind fin stabilisation? What is a projectile's static margin? (5 marks)
(c) What parameters vary to affect a projectiles's gyroscopic stability during flight? What characteristics could a gyroscopically stable but dynamically unstable projectile possess? (5 marks)
(d) Describe the origins of equilibrium yaw and magnus effect on spin-stabilised shells. How does a point-mass trajectory model differ from a modified point-mass model? (5 marks)
Lots more (as pointed out to us by EX_STAB) here
Comments
I'll stick those in the too hard box and get on with shooting!
Posted by: TimC | April 7, 2008 8:57 AM
Good grief. Just the QUESTIONS made my head hurt.
I think I'll have a quiet single malt instead.
Posted by: Kim du Toit | April 8, 2008 1:00 AM
You got jet lag or what? Just point the metal end at the deer and squeeze the trigger.
P.S. The snow in Colarado was outstanding and I got a new buck knife. If you must get on planes skiing or shooting should be on the other end.
Posted by: Ghostrifle | April 8, 2008 8:07 PM
Although I like to consider myself a rather smart person, the simple Marine in me is saying, "Correct sight alignment, correct sight picture, breath control, slow, steady squeeze...BANG!"
Cheers from the range
Posted by: LCpl Dan | April 9, 2008 12:57 AM