Critical Engine on a Jet
Joined: Jul 2000
Posts: 142
Likes: 1
From: europe
The point being...
money.
You take away the peak load on the engines, thus greatly reducing wear (especially in the hot section) and actually even reducing the possibility of an eng. failure during T/O (at least statistically... NO I won´t discuss the pros and cons).
money.
You take away the peak load on the engines, thus greatly reducing wear (especially in the hot section) and actually even reducing the possibility of an eng. failure during T/O (at least statistically... NO I won´t discuss the pros and cons).
Terrier
Joined: Dec 1999
Posts: 564
Likes: 0
From: moonbase alpha
So, when i am on fire in my 757 (upwind engine) with a strong crosswind i shouldn't worry about it? Not critical?
I appreciate that what day trader says is entirley correct in a purist viewpoint, but aviation is about reality. Not theory.
So, I still maintain that in reality on a real day your critical engine is the upwind one.
I would say that is fairly critical in a twin jet.IMHO.
I appreciate that what day trader says is entirley correct in a purist viewpoint, but aviation is about reality. Not theory.
So, I still maintain that in reality on a real day your critical engine is the upwind one.
I would say that is fairly critical in a twin jet.IMHO.
Joined: May 2001
Posts: 113
Likes: 0
From: Netherlands
FlapsOne, could you give a more detailed explanation of the negative weathercock effect and describe what causes it?
As far as the critical engine's concerned, it's all a matter of which definition you use:
1. the critical engine is the engine that causes the greatest yawing moment when it fails (works for any multi-engine airplane).
2. the critical engine is the engine which has its centre of thrust furthest from the longitudinal axis (works for props only).
I'd vore for the first definition, as a strong crosswind can easily overcome the effect of the centre of thrust being further away from the longitudinal axis.
Erik.
As far as the critical engine's concerned, it's all a matter of which definition you use:
1. the critical engine is the engine that causes the greatest yawing moment when it fails (works for any multi-engine airplane).
2. the critical engine is the engine which has its centre of thrust furthest from the longitudinal axis (works for props only).
I'd vore for the first definition, as a strong crosswind can easily overcome the effect of the centre of thrust being further away from the longitudinal axis.
Erik.
Joined: Jun 2001
Posts: 1,178
Likes: 0
From: UK
Yep.
Proportionally small fin (with very small rudder) vs proportionally long fuselage. Fuelage wins. Strong crosswind on ground has greater effect on fuselage than fin causing it to yaw away from the crosswind.
I flew 3000 hrs+ in them and guarantee it's fact.
Proportionally small fin (with very small rudder) vs proportionally long fuselage. Fuelage wins. Strong crosswind on ground has greater effect on fuselage than fin causing it to yaw away from the crosswind.
I flew 3000 hrs+ in them and guarantee it's fact.
