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We’re like to end this month with a formula that’s quite complicated; it allows rockets to set new records with each launch. If you find our usual questions too easy, we’re counting on you to reply!
#ArianeGroup #ArianeFactspic.twitter.com/ykbHncsGdd
The equation defines the amount of matter ejected every second. For example, an Ariane 5 booster rocket’s fuel is depleted in 130 seconds and weighs 240 tonnes, giving an ejection rate of 1.8 tonnes per second… Any additional facts? #ArianeGroup #Ariane5pic.twitter.com/zZZyiq0hln
C'est la friction de l'air dans l'atmosphère? Pour éviter que la fusée ce prennent celle si comme un mur ou rebondissent dessue
Le débit massique en fonction du col de la tuyère hihi
Maximum mass flow though the throat of a rocket engine? I remember seeing something similar in a lecture 15 years ago ... Didn't the name of the formula start with a W?
That sounds plausible. But damn, it's sad how little fluid mechanics I remember.....
No idea
@A_Demay : busted
Ok I can’t quite remember (my lecture notes are in my office) but I reckon it’s the rate of flow mass out of a rocket engine, M being the molar mass, Pc and Tc are pressure and temp of combustion chamber, gamma is 5/3, A is the area of the throat? 
Old lecture notes I should say - we don’t get quite this far in my first year UG space science course!
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