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### Optimal speed per altitude for orbit launch

On Kerbin, rockets have an optimal speed depending on altitude for maximum fuel efficiency, as You can save fuel by being close to your terminal velocity during ascent. Lower velocity wastes delta-...
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### Cause of apparent plume deflection on SES-10?

While watching the SES-10 flight, starting a little after T+1:30, I noticed that the direction of the first-stage exhaust plume started to diverge from the alignment of the rocket body. The ...
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440 views

### Powered Explicit Guidance: Should rocket be pitching down at orbital insertion?

I simulated an orbital insertion using Powered Explicit Guidance as used in the space shuttle. The PEG algorithm works great. I hit all my targets: altitude, velocity, orbital inclination, longitude ...
1 vote
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### Angle of attack, or displacement angle?

When I hear "angle of attack" or AoA, I think of an airplane. Usually, both the airfoil and the plane itself have a clearly defined 'top' and 'bottom'. In this case, the concept of angle of attack is ...
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### How to find the optimal launch trajectory for a rocket launched from a planet with an atmosphere?

I originally asked this question on maths stack exchange As the title states I am trying to find the optimal launch trajectory for a rocket launched from a planet with an atmosphere (Earth) in order ...
902 views

### Would a standard gravity turn still be the most optimal path to orbit if Earth did not have an atmosphere?

If Earth had no atmosphere, then would a standard gravity turn still be the most optimal path to orbit? Why or why not?
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### Was the gravity turn used in early spaceflight?

Reading through the Wikipedia article about Gravity Turn, specifically the Use in spaceflight section, it seems that the Gravity Turn was not used in early spaceflight. Is that correct? For example, ...
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825 views

### How does a rocket go from gravity turn to orbit?

A rocket launch normally begins with a roll to align with the orbital plane and a pitch to allow gravity to gradually torque the rocket down as it climbs. The combined roll and pitchover maneuver last ...
378 views

### Would a lunar or interstellar rocket use a gravity turn on take-off, today?

Is a gravity turn only used for rockets interested in orbit or a gravitational slingshot? From this answer it sounds like Apollo 11 only used a gravity turn for the crew to maneuver. Are there ...
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### Why is a 1.5:1 TWR desirable for a reusable launcher?

According to a Teslerati article linked from another QA: The most critical component for the booster, according to Musk, is that there is “a lot of force pushing up.” He states that to launch ...
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