The categorization isn't that strict, liquid fuel rocket also use solid fuel Replying to: PSLV is liquid fueled with solid boosters,Vega has liquid fueled upper stage -- Mao Clone Post ReplyForum motif 01/11/2024, 15:45:07 Author Profile | Edit booster is stll considered a liquid fuel rocket. Similarly solid fuel rocket that has a small liquid fuel upper stage is still considered a solid fuel rocket. Recommend | Alert | 5 4 3 2 1 0 -1 -2 -3 -4 -5 Where am IGo Up Go TopPost ReplyBack