js
Posts: 99
Joined: Sat Sep 01, 2001 12:42 am

Steep Angle Of Attack

Wed Jul 07, 2004 7:11 am

Wow, now that's a steep angle!

http://www.airliners.net/open.file/614141/L/

 
Horus
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 7:16 am

It looks normal to me
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Starlionblue
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 7:16 am

Doesn't seem unusual to me.

Two points about angle of attack (alpha) though:
- Alpha is the angle of the fuse compared to the direction of flight, not the angle between the fuse and the ground. Since this plane is going up (I think) it's not that severe.
- Once the plane is off the ground, pilots don't use alpha as a reference. They simply keep the speed a certain number of knots over V2. If the plane is lightly loaded, this means a high angle of CLIMB (not attack).

It's a mighty nice pic but I can't help but think it might be a plug for your own photography  Big grin

"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
js
Posts: 99
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 7:20 am

Or it might mean that I thought it was a really steep angle of attack  Big grin
 
flymia
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 7:24 am

Looks normal to me too.
"It was just four of us on the flight deck, trying to do our job" (Captain Al Haynes)
 
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Starlionblue
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 7:24 am

I'm not judging. We all plug Big grin
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
js
Posts: 99
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 7:42 am

Hey Andreas, I'll be sure to let you know if I decide to plug  Big grin
 
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Starlionblue
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 7:43 am

We all tease too  Big grin
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"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
SUPRAZACHAIR
Posts: 474
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 10:10 am

If the plane is lightly loaded, this means a high angle of CLIMB (not attack).

Hmmm. I'm not sure I understand why "angle of climb" and "angle of attack" don't correlate (if not being the same thing). Excluding fighter jets and high HP aerobatic planes, Vy is normally a smaller AOA (higher airspeed) than Vx (greater AOA, lower airspeed). But if we're talking about just holding a certain airspeed, then a lighter aircraft has a higher angle of attack/climb.

 
InnocuousFox
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 10:28 am

If you aren't flying level, you aren't "attacking" level, are you? It's all about comparing the direction of travel to the direction of the wings, as said above.
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VEEREF
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 10:50 am

AOA= angle of the relative wind to the chord line of the wing

At slower airspeeds aircraft must increase AOA in order to keep the same amount of lift. The pitch attitude that an aircraft has for a particular AOA depends on the Angle of Incidence, or the angle between chord line and longitudnal axis of the aircraft.
if you watch a B-52 from the front for example you will notice the nose actually lowers quite noticably after liftoff due to a high angle of incidence. Most newer, or "supercritical" wing designs are more efficient than older wings and require less wing area to generate the same amount of lift. They are also capable of higher Angles of Attack resulting in "steeper" climb.
Airplanes are cool. Aviation sucks.
 
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Starlionblue
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RE: Steep Angle Of Attack

Wed Jul 07, 2004 11:30 am

Hmmm. I'm not sure I understand why "angle of climb" and "angle of attack" don't correlate (if not being the same thing).

They do correlate in some ways, but angle of climb is dependent on lift and thrust. Higher angle of attack gives higher lift (up to a point) but it also produces drag.

They are not the same. Angle of climb is the climb rate related to the distance traveled, not Alpha.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo

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