Why do some people fly 747 patterns

[fastback]

Stall speed increases as the square root of the load factor. Load factor increases as 1/(cos(bank angle)).

For example: a 60 degree bank gives a load factor of 2. The square root of that is about 1.4. Therefore your stall speed increases by a factor of 1.4.

So stall speed would go up by 1.4 times in a level, unaccelerated turn, ya? It wouldn't go up so much if descending, I think. If the airplane is trimmed up for your approach speed and you roll in 60 deg bank, the nose will drop, leaving a decent stall margin.

FN FAL, thanks for changing your avatar! Very nice.

 

[FN FAL]

Stall speed increases as the square root of the load factor. Load factor increases as 1/(cos(bank angle)).

For example: a 60 degree bank gives a load factor of 2. The square root of that is about 1.4. Therefore your stall speed increases by a factor of 1.4.

That's only if you are trying to maintain altitude by pitching for it. Thank you for playing, please come again.

 

[Catbert]

So stall speed would go up by 1.4 times in a level, unaccelerated turn, ya? It wouldn't go up so much if descending, I think. If the airplane is trimmed up for your approach speed and you roll in 60 deg bank, the nose will drop, leaving a decent stall margin.

Correct.

All other factors being equal, if the plane stays at 1g the stall speed remains the same.

 

[Catbert]

That's only if you are trying to maintain altitude by pitching for it. Thank you for playing, please come again.

I'm pretty sure that's what you implied here (bold is mine):

Stall speed doubles with bank angle if you're pitching to maintain altitude...

And I don't know what you mean by 'doubles with bank angle'.

 

[Flyerjosh]

Odds are that those wide patterns are being flown by pilots like me that are trying to regain proficiency in "little" planes! Hard to break the habit after flying bigger/faster stuff for so long.

 

[skipper1]

We all know...

those wide patterns are standard training procedures at Riddle!!!

 

[Immelman]

My (strong) opinion on pattern work (in spam cans & rag wings): Crosswind leg should be just long enough to roll wings level and check for traffic. Pull power to idle abeam midfield glide it all the way to landing, and keep all turns 30 degrees bank.... no less!

 

[FN FAL]

And I don't know what you mean by 'doubles with bank angle'.

I have doubles when someone banks the plane too much and pulls the yoke into their chest...don't you?

 

[frog_flyer]

Crosswind leg should be just long enough to roll wings level and check for traffic.

agree.

Pull power to idle abeam midfield glide it all the way to landing

disagree. pull it when you beam the numbers, turn xwind when rwy is 45 degree angle. you cant screw it up unless you're foreign.

edit.. guess it varies by rwy length though eh?

 

[VNugget]

So stall speed would go up by 1.4 times in a level, unaccelerated turn, ya? It wouldn't go up so much if descending, I think. If the airplane is trimmed up for your approach speed and you roll in 60 deg bank, the nose will drop, leaving a decent stall margin.

FN FAL, thanks for changing your avatar! Very nice.

What's an unaccelerated turn?