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Over/Under Expanded Nozzles at Different Altitudes

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Currently in-game there are examples of over-expanded nozzles when throttled down/up. Yet this doesn't include engines with under-expanded nozzles or overal change at higher altitudes/different planetary bodies.

Examples of over-expanded and under-expanded nozzles: 

(Credibility: Huzel, D. K. & Huang, D. H. (1971). NASA SP-125, Design of Liquid Propellant Rocket Engines)

                                                 Image result for overexpanded nozzle

Edited by KSPACE
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5 minutes ago, lobe said:

It's been a couple weeks since I've played but I think they have it as a result of the plume getting smaller the higher the pressure the surrounding air is. 

Sorry, I revised the topic, meaning your response became less relevant even if being entirely true. 

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