Gun one have times feets ratio 18.8 55 degree?
Gun m/v ft/s Shell (lb) Time to ft (m) at 25° (seconds) Time to ft (m) at 40° (seconds) Time to ft (m) at 55° (seconds) Max. height (ft)
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1-16439764-1
QF 13 pdr 9 cwt 1990 12.5 10.1 15.5 22.1 19000
QF 12 pdr 12 cwt 2200 12.5 9.1 14.1 19.1 20000
QF 3 inch 20 cwt 1914 2500 12.5 8.3 12.6 16.3 23500
QF 3 inch 20 cwt 1916 2000 16 9.2 13.7 18.8 22000
QF 4inch Mk V World War I 2350 31 ( 3 c.r.h. ) 4.4?? 9.6 12.3 28750
table_16439764_1
SELECT Gun FROM table WHERE Time to ft (m) at 55° (seconds) = 18.8
18.8