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Missing ground effect? (landing).


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Posted

With the low aspect ratio wing there should be a significant cushion starting at height equal to 1/2 wingspan - with additional nose down effect (Nose down maybe catch by FBW?).

 

With low AoA and too high landing speed, IMO the M2000 should be a floater eating up runway before touch down.

 

Of course I can be wrong. Any real pilot or Design Team to confirm this?

Posted

No - I do not feel it.

Admit I have a problem to keep the ^ within brackets.

 

Will practice more

:thumbup:

Posted
With the low aspect ratio wing there should be a significant cushion starting at height equal to 1/2 wingspan - with additional nose down effect (Nose down maybe catch by FBW?).

 

With low AoA and too high landing speed, IMO the M2000 should be a floater eating up runway before touch down.

 

Of course I can be wrong. Any real pilot or Design Team to confirm this?

 

I've read on multiple occasions that the Mirage 2000 has some ground effect on landing which do help for the flare. :thumbup:

 

So 1/2 wingspan is roughly 15ft.

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Posted

The existence or not of ground effect simulation can be tested in the way described here https://forums.eagle.ru/showpost.php?p=2901404&postcount=2

 

I performed a similar ground effect test in 1.5.6, se attached track. Flying perfectly horizontally in ground effect with a speed of 153 the AOA was 10 deg, while doing the same outside ground effect the AOA was 11.2 - 11.3 deg.

 

Conclusion - ground effect is definitely simulated. Also the difference in AOA of 1.2 - 1.3 deg is pretty good IMO.

2000 ground effect 2.trk

Posted

Nice test.

" You must think in russian.."

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Posted

Isn't it that ground effect ONLY happens when there is wind defined in the mission. If wind = 0 there's no ground effect at all ?

L'important n'est pas de tuer, mais de survivre.

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if you read this you are too curious

 

 

Posted
Isn't it that ground effect ONLY happens when there is wind defined in the mission. If wind = 0 there's no ground effect at all ?

 

Ground effect is usually half the distance of the wingspan from the ground where the air is compressed downward by the wings and compressing against the runway/ground, thereby creating additional lift and the aircraft or birds for that matter, start to "float" a bit.

 

Wind at zero will not affect the ground effect.

Posted

GEV. Ground Effect Vehicles, flies only on ground effect.

 

Common is the very low aspect ratio wing.

High aspect ratio wings (sailplanes) generates very little ground effect.

 

GEV aircraft

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