need Some Help On V-n Diagram Concept
 

hi everybody
I have some question about V-n Diagram
Can you Explain How Altitude Effects on V-n Diagram
I should Analyse an airplane in Sea Level and 40000 ft flight level.
I know V equivalent Should be found but I'm Confusing about Velocities
I need a v-n Diagram for this airplane:
Stall Speed Clean= 200 KM/H
Equivalent Max Level Speed 930 KM/H
Altitude: Sea Level and 40,000 ft
W Gross : 420 Kg
Sw = 2.5 M^2
MAC wing: 0.891 m
CN max + =1.53
CN max - = -1.45
CL alpha= 4.13 (1/rad)
VC Max=926 km/h
VD Max=1300 km/h
Delta Elevator= -14:14 deg
CL max + = 1.5
CL max - = -1.5
Root Chord: 1211.6 mm
Tip Chord: 456.8 mm
Wing span: 3009 mm


Thanks

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

missile
 

missile!!!!!!!!!!! :confused:
its just an U.A.V
I'm just an Aerospace Student and I need to know this Concepts to do my homework!
Its sad that you think I wanna design a missile!:rolleyes:
but thank you for your advice

Standard
 

I should use JAR-VLA(Very Light Airplane) Standard for v-n Diagram
can you handle it?