Which Rocket Body Shape is Aerodynamically Superior: Saturn V or N1?

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Discussion Overview

The discussion centers on the aerodynamic superiority of the Saturn V and N1 rocket body shapes, exploring their designs and implications for performance. Participants examine the theoretical aspects of aerodynamics in relation to rocket design, considering factors such as drag, thrust, and operational conditions.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants note that the Saturn V features a straight body design with conical regions, while the N1 has a progressively expanding conical shape towards its base.
  • One participant believes the Saturn V's design is more aerodynamically logical due to its consistent regions that may reduce drag.
  • Another participant emphasizes that rocket design is not solely focused on aerodynamics, pointing out the N1's larger cross-sectional area to accommodate thrusters.
  • Consideration of speed and altitude is raised, with one participant suggesting that these factors influence aerodynamic performance and the thrust-to-weight ratio.
  • A participant questions the definition of "optimal aerodynamic flow," highlighting that the effectiveness of each design may depend on specific velocities and altitudes.
  • Another participant mentions that both rockets may have their advantages depending on the variables involved, suggesting a trade-off scenario.
  • One participant asserts that the N1's design ultimately failed to achieve successful flights, while speculating that the Saturn V likely has lower drag, though neither was primarily designed with drag reduction in mind.

Areas of Agreement / Disagreement

Participants express differing views on which rocket design is aerodynamically superior, with no consensus reached. The discussion remains unresolved, as various factors and trade-offs are considered.

Contextual Notes

Participants acknowledge the complexity of aerodynamic performance, noting that factors such as payload alterations and flight envelopes can significantly change the analysis. The discussion highlights the interplay between design choices and operational requirements without resolving the implications of these factors.

Polyverse
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When looking at the design of the both the U.S. Saturn V rocket, and the Soviet N1 rocket, there is an obvious design difference between the basic overall rocket body shape.

n1-saturnv.jpg


The Saturn V shows several conical regions, with a straight body design throughout.

The N1 shows more of a conical design, progressively expanding towards the wide base.


My belief is that the Saturn V shape is aerodynamically more logical, as it allows less drag along more consistent regions, whereas the N1 provides less area where there would be increased atmospheric friction, but I would like feedback on this, as I'd love to truly know which body design is aerodynamically superior.

(It also seems that more modern rocket body designs follow more similarity to that of the Saturn V, which supports my thinking as well.)
 
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Keep in mind that rockets are not designed solely to be the most aerodynamically sound vehicles possible. For example, the N1 has a larger cross-sectional area at the bottom in order to accommodate the massive number of thrusters at the bottom.
 
One also must consider the speed which the vehicles will be traveling as a function of altitude, and the thrust to weight/mass ratio.
 
Yes, though I'm basically asking which basic shape contains a more optimal aerodynamic flow, regardless of optimization for internal component housing.
 
"Optimal aerodynamic flow", for what velocity and altitude? (amongst other things).

I think the flight envelope on this vehicle is soooo large, it is a game of "trade offs"

Alter the payload and all of a sudden, the problem is different. Now the altitude where shock waves form is different.

They both work, perhaps one is only better than the other given a specific set of variables.
 
Actually, they don't both work. The N1 failed rather spectacularly, and was never successfully flown as designed. As for the drag though, I would imagine that the Saturn V would be the lower drag design, although as stated above, neither was designed with drag as the primary consideration.
 

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