And what country can preserve its liberties if their rulers are not warned from time to time that their people preserve the spirit of resistance? Let them take arms. The remedy is to set them right as to facts, pardon and pacify them. What signify a few lives lost in a century or two? The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
Thursday, February 1, 2024
How much lift can the blades provide when flying sideways like that. I'm thinking basically none.
In a right turn at greater than a 90 degree angle, absolutely NONE, but in a left turn there is SOME, but then again when evading bullets and surface to air stuff, who cares as long as you don’t run into the ground, your golden..
On 20 March 1989 during exercise Team Spirit In the country of South Korea I witnessed a CH-53D lift off with 34 souls on board. The pilot lifted off but did not have enough altitude to make the steep banking turn and the chopper lost what altitude it had and the blades hit the ground spinning the tail end of the chopper into the air spitting out Marines who hadn't even gotten seat belted in yet. Most of those guys lived if they missed the tail rotor blades. Out of 34 souls 18 Marines and Corpsman lost their lives that day mostly due to the ensuing fireball. May they be rest in peace.
The air provides lift relative to the position of the bottom of the lifting surface or airfoil... so technically it's providing lift...just that it's sideways... gravity though is no respecter of of the lifting body's position... what goes up... must come down
Lift/Thrust...doesn't matter the position, if the blades are turning, it's "pulling" somewhere. Even facing straight down, it's 'pulling' the aircraft in the direction the blades are pointing. Except in a vacuum of course.
It’s about power required to maintain altitude and airspeed. You can trade airspeed to maintain altitude in high bank angles but not for long. To sustain helicopter airspeed and altitude in a 30 degree angle of bank you need about 20% more power..usually doable. To sustain that airspeed and altitude in a 60 degree bank you need 100% more…usually not available. Key word is sustain. There’s plenty of ‘yank and bank’ in helicopters and the limiting factors tend to be pilot and gearboxes (power available).
If your in the chopper there is lift, if your on the ground and just off loaded from said chopper there is serious rotor wash and if your sorry 6 happens to be in sand, well let's just call it an instant sand blast cabinet.
In a right turn at greater than a 90 degree angle, absolutely NONE, but in a left turn there is SOME, but then again when evading bullets and surface to air stuff, who cares as long as you don’t run into the ground, your golden..
ReplyDeleteProb none, but the centrifugal force of turning would balance out
ReplyDeleteOn 20 March 1989 during exercise Team Spirit In the country of South Korea I witnessed a CH-53D lift off with 34 souls on board. The pilot lifted off but did not have enough altitude to make the steep banking turn and the chopper lost what altitude it had and the blades hit the ground spinning the tail end of the chopper into the air spitting out Marines who hadn't even gotten seat belted in yet. Most of those guys lived if they missed the tail rotor blades. Out of 34 souls 18 Marines and Corpsman lost their lives that day mostly due to the ensuing fireball. May they be rest in peace.
ReplyDeleteinertia,,, momentum, experience.
ReplyDeleteThe air provides lift relative to the position of the bottom of the lifting surface or airfoil... so technically it's providing lift...just that it's sideways... gravity though is no respecter of of the lifting body's position... what goes up... must come down
ReplyDeleteLift/Thrust...doesn't matter the position, if the blades are turning, it's "pulling" somewhere. Even facing straight down, it's 'pulling' the aircraft in the direction the blades are pointing. Except in a vacuum of course.
ReplyDelete10-4
ReplyDeleteIt’s about power required to maintain altitude and airspeed. You can trade airspeed to maintain altitude in high bank angles but not for long.
ReplyDeleteTo sustain helicopter airspeed and altitude in a 30 degree angle of bank you need about 20% more power..usually doable. To sustain that airspeed and altitude in a 60 degree bank you need 100% more…usually not available.
Key word is sustain. There’s plenty of ‘yank and bank’ in helicopters and the limiting factors tend to be pilot and gearboxes (power available).
And altitude. Time to correct is the difference between controlled flight into terrain and a story that begins "I shit you not..."
ReplyDeleteIf there is pitch and rotor speed, there is lift
ReplyDeleteIf your in the chopper there is lift, if your on the ground and just off loaded from said chopper there is serious rotor wash and if your sorry 6 happens to be in sand, well let's just call it an instant sand blast cabinet.
Delete"Helicopters don't fly...they beat the air into submission."
ReplyDeleteThere is lift being produced, but isn't opposite gravity in that case.
ReplyDelete"Helicopters don't fly... they're so ugly the Earth repels them."
ReplyDelete