You will want to place something like the AV-R8 Winglet at the bottom of your rocket. If that doesn't work, then the cause is often a lack of control surfaces and aerodynamics. It might be because the command pods' weight will shift the center of mass, which allow the craft to be more stable (and it seems like the case: a Command Pod Mk1 on a Size 2 rocket will be less maneuverable than one with Mk1-3 Command Pod. Replacing the entire aeroshell with the Mk1-3 Command Pod (plus decoupler and chutes) will give it excellent handling even without SAS. Flying it without SAS, you will quickly find yourself losing control. Career players that are low on tech can stack smaller reaction wheels to mitigate the lack of torque.Ī good example of this phenomenon is the GDLV3. It is preferred to add multiple reaction wheels (about 15N/m required) and multiple gimbal engines. If the rocket does NOT contain a manned pilot module (even more so with the Probodobodyne Stayputnik as it has no SAS), then it is very likely (almost guaranteed) it WILL go out of control. Note: If the rocket contains a manned pilot module (especially those of command pods) then the craft should be very stable, and should even be flyable without SAS (and, depending on your build, may or may not need SAS assistance to achieve orbit). There are multiple causes and slightly different solutions. The most common problem of new players is their rockets going out of control while in the atmosphere. Wait until the capsule's speed drops below 200 m/s, or the parachute sign on the left turns from red to grey, and deploy the parachute.Ĭommon problems and solutions Rocket tumbles or goes out of control Keep the level indicator aligned with the retrograde marker to let the heat shield take the brunt of the heat. However, it may take many passes through the atmosphere before the vehicle finally slows down enough.ĭuring re-entry into the atmosphere, the capsule will heat up and lose speed. If fuel is scarce, any periapsis below 70 km will eventually result in de-orbiting. Discard the engine and fuel tank by staging, leaving only the command pod with its heat shield and parachute. Now burn until the periapsis is around 30 km. Wait until the craft is at apoapsis and orient it for a de-orbit burn by aligning the level indicator on the navball with the chartreuse yellow retrograde marker. A stable orbit will be reached when both apoapsis and periapsis are above 70 km. The projected trajectory will begin to widen until the PE label appears on the other side of the planet. The apoapsis will begin to shift ahead aim to keep it roughly the same amount of time ahead by throttling up or down with Shift and Control. At 30 seconds before apoapsis, reignite the engine at full throttle with Z. Let the rocket coast towards apoapsis after cutting off the engine.Īs the rocket approaches apoapsis, orient it once more to align with the prograde marker. In map view, hover the mouse over the "AP" label on the highest point of the trajectory to monitor the apoapsis height cut off the engine with X when it reaches 70 km (70,000 meters). Continue to watch the Navball and steer the rocket to keep it aligned it with prograde. Click the Navball toggle at the bottom of the screen to make it visible again. Hit the space bar to discard it and to activate the second stage. The fuel of the first stage will run out before 20km altitude. If craft nears the apoapsis too fast, which can be seen in a dropping time to apoapsis, it might be necessary to point “above” the prograde marker, away from the brown half. Follow it by keeping the level indicator within the circle of the prograde marker at all times especially while in the lower atmosphere, but at about 30km the reaction wheels should be able to compensate. On the Navball this can be observed as the Prograde marker dropping further down. While the rocket accelerates, gravity will bend the trajectory downwards. The heading ("HDG") on the Navball should now be 90 degrees. When the rocket's speed reaches 100 m/s, start a gravity turn by pressing the D key until the rocket is pitched 10 degrees towards the East. Use the Navball to keep the level indicator centered on the blue hemisphere. Launch by hitting the space bar and keep the rocket pointed straight up until the vehicle's speed is 100 m/s.
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