11.9 Km/s You may notice I build this rocket off-center too clear the tower. Piloting instructions: Keep SAS on until you release the final stage. Some steering is required in the first two minutes after lift-off. After the final stage is released turn SAS and the engine off. Use spin (the Q or the E key) to stablize the stack. Wait until the released tri-coupled part has drifted away and only then fire the last engine. Staging: [table] [tr][td]Time[/td][td]Action[/td][td]Speed[/td][td]Altitude[/td][/tr] [tr][td]00:00[/td][td]Apply SAS and throttle up[/td][td]0[/td][td]0[/td][/tr] [tr][td]00:25[/td][td]Eject SRBs[/td][td]62[/td][td]1200[/td][/tr] [tr][td]02:04[/td][td]Release Liquids[/td][td]157[/td][td]10000[/td][/tr] [tr][td]02:10[/td][td]Fire SRBs[/td][td]-[/td][td]-[/td][/tr] [tr][td]02:35[/td][td]Eject SRBs[/td][td]230[/td][td]15200[/td][/tr] [tr][td]04:08[/td][td]Release Liquids[/td][td]650[/td][td]52000[/td][/tr] [tr][td]04:13[/td][td]Fire SRBs[/td][td]-[/td][td]-[/td][/tr] [tr][td]04:38[/td][td]Eject SRBs[/td][td]878[/td][td]72000[/td][/tr] [tr][td]06:12[/td][td]Release Liquids[/td][td]1647[/td][td]189000[/td][/tr] [tr][td]06:17[/td][td]Fire SRBs[/td][td]-[/td][td]-[/td][/tr] [tr][td]06:42[/td][td]Eject SRBs[/td][td]1992[/td][td]242000[/td][/tr] [tr][td]08:16[/td][td]Release Liquids[/td][td]2945[/td][td]475000[/td][/tr] [tr][td]08:21[/td][td]Fire SRBs[/td][td]-[/td][td]-[/td][/tr] [tr][td]08:46[/td][td]Eject SRBs[/td][td]3340[/td][td]565000[/td][/tr] [tr][td]10:20[/td][td]Release final stage[/td][td]4423[/td][td]952000[/td][/tr] [tr][td]10:30[/td][td]Fire final stage[/td][td]-[/td][td]-[/td][/tr] [tr][td]17:44[/td][td]Final stage done[/td][td]11898[/td][td]-[/td][/tr] [/table]