gilflo Posted March 2 Share Posted March 2 (edited) Hello all, I am playing Realism Overhaul KSP 1.12.3, using MechJeb2 for my rocket ascent. I built quite a Huge rocket - 2 Stages LqH/LqO - to set in orbit 400 kms my 225T charge. I never succeed the ascent using PVG method, even after reading all about PVG ascent here: https://github.com/KSP-RO/RP-1/wiki/TroubleshootingMechJebPVG I tried many classic ascent methods and send my charge in orbit with only 7527 DV Atm 9133 DV VAC with insertion behind Periapsis. Here are the parameters: Stage 1: 6 engines M1U-SL 3502 DV Atm 4208DV VAC TWR SLT 1.50 Stage 2 3 engines CobraH 4025 DV Atm 4925 DV VAC TWR 1.38 TTL DV 7527 DV Atmo 9133 DV VAC Charge: Lunar station + Injector 225T (Engine AR 22) TOW: Launcher + charge 2615T Height 182m Diameter 9m Engines Base 10m Orbit 400 kms Gravity turn begins at 100m/s, Turn shape 37,5% -End turn 150kms at -4° I do not understand why PVG can't perform this launch: I need more DV and it ends with more than 1000 kms apoapsis and low periapsis. I know it depends hardly on rocket parameters, but my rocket seems quite "standard" ! Edited March 2 by gilflo Quote Link to comment Share on other sites More sharing options...
gilflo Posted March 12 Author Share Posted March 12 Ok I got the Dev MechJeb 2....when I get the "non Dev" build, PVG runs perfectly, but I do a little better with my classic ascent program...minus 100 to 200 DV ! Quote Link to comment Share on other sites More sharing options...
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