Y
HN Search
Hacker News Search
new
|
comments
|
top
|
jobs
cs24
searching PlanetScale…
1.
▲
2.
▲
3.
▲
4.
▲
5.
▲
6.
▲
3 ms
·
1.
▲
by
cs24
10y ago
Basically three mechanisms have been used: a. Powder burning, these were the norm with shrapnel shells in WW1, and continued with smoke shells until at most a few decades ago. b. Mechanical time, appeared in WW1 and still used for shells