Page 233 - NAVAL SCIENCE 3 TEXTBOOK

NAVA L WEAPONS AND AIRCRAfT 239

STUDY GUIDE QUESTIONS CRIT ICAL THINKING
I. \ "hat is the purpose of rifling in a gUll bnl'l'e1? I. Research ilnd trace the evolution of Ihe modern naval large-
bore gun from the slllooth-bore cannon of the fifteenth
2. A. How is the caliber of a gun measured?
century to the rifled gun of the twentieth century.
B. How is the caliber of gUlls with 3-inch barrels and larger
2. Describe the process of firing a projectile from ~ ll~val gun
expressed?
in terms of the chemical reaction of the burning propellant
3. A. On what does the effective rtlnge of a gun depend?
ch~rge and the ph)'sics of the resulting forces on the projectile.
13. \Vhat is the purpose of the RAP innovation in naval gun Explain how Newton's Laws come into piny during the firing
projectiles? process,
4. A. \,Vhat gun is carried b)' 1110st post-\\'orld \Var II destroyers
and cruisers?
VOCABULARY
B. \Vhat is the range of this g Ull in miles?
rifled barrel gun mount
5. A. \Vhat is the close-in shipboard weapon in wide lise tada)'?
effective nlllge du~l-p urpose system
B. How does it operate? main battery arc of train
6. \ " hal are the two principni components of a rollnd of gun propellant arc of elevi.1tion
ammunition? fuse caliber
7. From the standpoint of the propellant, ",hnt kind of gun burster charge rifling lands
ammunition is lIsed 1110st in the acti\'e fleet today? RAP ti'agmenting projectile
8. \ Vhat is the sequence of the propellant train, and what docs recoil illuminating projectile
e<1ch st ~ge do? case ammunition star shell
fixed, scmifixed amlllunition chaff
9. A. \Vh~t is the projectile in naval ~mmul1ition?
shrapnel controlled variable time fuse
B. ' ,Vhat are the three 1l1 ~ill projectile p~ rts?
projectile proximit)' fuse
10. List five kinds of special purpose projectiles. ogive flak
II. What is the proximity-fused shell designed to do?
12. \Vhnt are some important tasks that mi1}' be assigned to 11<1\'al
surt:lCe fire support?