radar, barrage baloons, anti aircraft c Flashcards
1
Q
when was radar invented?
A
mid 1930s
2
Q
what was radar used for?
A
to track german planes
3
Q
where would information that radr collected be analysed ?
A
sector stations collected information
4
Q
apart from WW2 where were barrage baloons also used?
A
WW1
5
Q
what are barrage baloons filled with?
A
hydrogen
6
Q
what did barrage balons stop enemy aircrafts from doing?
A
stopped them from geing low entry points to a city
7
Q
by august 1940 how many barrage baloons were placed in strategic locations?
A
2, 368
8
Q
when did the comitte of imperial defence assign 450 barrage baloons to protect london?
A
1936
9
Q
what are the features of anti aircraft guns?
A
. high firing rate
. can be positioned at high angles to target enemy aircrafts
10
Q
how many rounds can an anti aircraft gun fire in 1 minute ?
A
120 rounds
