Especially when I need to get into space fast. Yeah, I'm definitely no longer attached to fins. I'm using AoA set to 5, what's your suggestion? I'm slowly getting there, but in ye olden 1.0.5 fin spam was quite adequate. Limit the AoA, but turn that steering off and leave it that way. PS: One tip if MJ keeps flipping your rocket is to turn Corrective Steering OFF. What's the ground thrust-to-weight ratio on this ship that always flips? During the launch, the entire rocket flips over around 40k the gravity turn was. ![]() ![]() I'm sure anyone who reads my posts gets tired of hearing me say it, but my rockets never flip. Discovery 2 will (hopefully) enter orbit, perform a first-ever space. Notice how many real rockets have fins? I very rarely put a fin on anything. Fins are totally unnecessary 99% of the time. K Space Academy 11.4K subscribers Subscribe During Kerbal Bootcamp, Das explains why a rocket sometimes wants to flip over during launch in Kerbal Space Program. The dev build has proven slightly handier, but overall I managed to get a rocket flying (see my recent showoff thread and screenshots) by grossly violating the basic instructions of ensuring rocket stability and removing all fins. Kerbal Space Program: Making History Expansion is now available on PC for 14.99 on the Steam digital distribution platform and will soon be available on GOG and other third party resellers. (The blue and cyan lines represent wing and body lift forces respectively.) Some of those red lines are coming off the various solar panels, antennas and landing gear attached radially to your upper stage. The current release build appears to be sensitive to oversteeeing. Those are drag force vectors, and they're what's trying to flip the rocket over. It always requires a bit of experience to judge the correct profile.Originally posted by dennis.danilov:I did try. If the profile was correct, you would have gained considerable horizontal speed already, and with a final burn when aoutside the atmosphere you'll get to the orbital speed. Start looking at the apoapsis altitude in the map view, you need to achieve 70-75 Km: so, throttle down if you are already at that value. Apply some angle (never more than 5°, the size of the prograde marker of the navball) if needed to start gaining horizontal speed. So, you need to angle the nose of your rocket just a little at a time in the correct direction (generally, pitch down towards heading 090°), the smaller the angle, the more similar the ascent profile is to a true gravity turn (the most efficient profile).ģ) After the separation of the second stage, rocket will be much more maneuverable (due to less moment of inertia, but also due to lower aerodynamic effects on the fins). Not pitching enough will not provide the horizontal speed required, in the end you need a horizontal speed of about 2200 m/s for a LKO. Sure, you want to pitch down during the ascent, but pitching too fast will make the rocket travel within the lower and denser atmosphere for longer, and drag will waste much of your DV. Ģ) during ascent, always keep the nose of the rocket very close to the prograde direction. ![]() I have also tried launching with and without SAS on and it flips over no matter what. I have tried adjusting fins, fuel tanks, thrusters, and throttle. I have zero idea how to use ascent guidance but I was using classic ascent profile and it kept flipping. This rocket that I have designed to deliver a rover to duna keeps flipping immediately after launch. With a CoL much lower then the CoM, the rocket will be very hard to steer, but that is not so bad during the ascent, because. Rocket keeps flipping when using ascent guidance mechjeb. Place fins at the tail so the Center Of Lift is visibly lower then the Center of Mass at all times. My suggestions for a successful orbit are:ġ) stability: while building the rocket, each stage must remain stable even when almost empty of fuel. I'd suggest not to rush for the orbit goal, unlocking more techs will certainly make the achievement easier.Īnyway, here is the pic of a 2-stage rocket able to achieve orbit with just those few parts (Reliant engines, FL-T200 tanks, small fins), without too much correction and not even SAS.
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