Cin Qipinsar
WINGINILE i
Dhp-seenae.
Mark13.
(Imploston-type bomb; previously designated "Improved
60-ineh weapon. }
22.
Possible improvements to the Mark 6 bomb which are
under considvration for the future were mentioned in the
preecding progress report.
The cffort at this stage consists
principally of work on new components, for example the external
initiator.
Increasing the length of the bomb from 128 inches
(the length of the Marks 4 and 6G) to 145 inches is desirable,
but this is controlled by bomb bay size in aircraft.
The date
when aireraft with larger bomb bays will become available in
sufficient mumbers therefore influences the design of the
weapon.
Stockpiling of the Mark 13 is tentatively scheduled
to begin early in 1954.
23,
Other major development activities in the field of
fission weapons are 25 follows:
32h. Uranium 232.
ean tk nma4
which,
Uranium 233 is a fissionable material
in ordinary implosion weapons, would probably be somewhat
less effective than plutonium but considcrably more effective
than U 2
/
~ 12
.
TY yp-SeeRie
AO?
STEXCINIG I