PPRuNe Forums - View Single Post - need Some Help On V-n Diagram Concept
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Old 27th March 2011 | 09:53
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Genghis the Engineer
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The technical problem is easy enough (work in EAS not TAS, but also add in an Mne figure, which will correspond differently to EAS with changing altitude), but just why are you trying to work out the flight capabilities of a cruise missile - which is roughly what those numbers correspond to.

Now, since you're in Iran, and I'm guessing that most countries who make cruise missiles aren't all that open about these figures with people in your country, you will probably have to guess what Mne is - but you should get a reasonable idea from sales literature handed out at airshows, or possibly Janes.

For detailed advice on preparing a V-N diagram, you could do worse than using the European standard CS.23. Vs will vary slightly with altitude, but since your stall speed value is very vague already, I'd not bother changing it.

And please don't try to do aeronautical calculations in km/hr, the grown-ups will all laugh at you. Use m/s, fps, or knots.

G
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