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Questions tagged [drag]

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9
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1answer
1k views

What is the most aerodynamic Satellite?

From what I understand at least in the lower orbits you want the least amount of drag possible. My brain is telling me that a long pole or submarine shape satellite orientated to the direction of ...
0
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0answers
59 views

Nano spacecraft reentry

Suppose if one designs a Small size reentry capsule. What will be the typical deacceleration achieved by atmosphere. More precisely, what is the relationship of the size and drag by atmosphere. I am ...
3
votes
1answer
117 views

Reference frames - why do I need to convert to Geocentric Equatorial State Vector to solve equation of motion?

I am asking this question in relation to an example shown in the 'Orbital Mechanics for Engineering Students' book by Howard Curtis (third edition) pp659 example 12.1. The example is demonstrating ...
2
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0answers
52 views

Building a Drag model for rocket optimization

I need to build a drag model for my rocket optimization program and I stumbled upon by the following formula: $CD = CD_c(M)$, $K_n < K_{nc}$, $CD = CD_{fm}$, $K_n > K_{nf}$, $CD = CD_c +(CD_{...
9
votes
1answer
274 views

What force is bringing Cassini down into Saturn's atmosphere in another 145 days; drag, or…?

Headlines suggest (as do their articles) that as a gravitational result of Cassini's final flyby of Titan, it's fate is sealed and it's orbit is destined to take it into Saturn's atmosphere on ...