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Questions tagged [max-q]

The point during the launch where the aero-dynamical stress on the launch vehicle is highest.

3
votes
0answers
28 views

Proton K or M altitude at Max-Q

I'm trying to fill out a sketch table as part of a research project, and I've run into a bit of a snag. Hopefully someone here can help me out. I'd like to know the altitude of the Proton K or M ...
8
votes
1answer
579 views

What percentage of overall fuel does a rocket burn up to get to max-q?

I know that max-q normally occurs around 11-15km (based on observations of watching falcon 9 launches and this). Furthermore, I know that the fuel usage for each rocket would vary a lot (which I ...
1
vote
1answer
213 views

Is it possible to calculate Max-Q without having to input an altitude

Is it possible to calculate max-q based on just upwards velocity instead of specially inputting a given altitude/air density? Based on this graph of Falcon 9 launches till MECO below "Air Pressure vs. ...
15
votes
3answers
1k views

Has Max-Q historically been a common failure point in rocket launches?

I believe that it's common knowledge that Max-Q is the point in which a rocket is undergoing the maximum dynamic stress during a launch and ascent. But, how often have rockets actually been destroyed ...
5
votes
1answer
203 views

What will Max Q for descent be?

I've seen lots of flight profiles that give Max Q during ascent. Around 33 to 35 kilopascals, if memory serves. But I have been having a hard time finding Max Q during descent. With the recent reuse ...
9
votes
1answer
687 views

Just how much can tall skinny rockets bend? (roughly, safely)

Below is a GIF I prepared and used in an earlier question, and the answer seems quite reasonable. With a height to diameter ratio of about 70 m to 3.7 m (nearly 20:1) a weight-conscious design, ...
1
vote
0answers
83 views

Max Q vs Prandtl-Meyer Fan

Does Max Q occur before or after the Prandtl–Meyer expansion fan? The shape, nature's way of avoiding a single shock wave (per Wikipedia) is visible on the Apollo launches for example. Apollo 11, ...
1
vote
1answer
443 views

How is max Q for the shuttle actually defined?

In this article about max Q https://en.m.wikipedia.org/wiki/Max_Q the shuttle launch is discussed. Since there are four distinct large objects - two boosters, one shuttle and one giant tank - there ...