V1 is the "commitment speed," at which the plane becomes obligated to fly.
My question:
What if the runway is extremely long, and the a/c in question, say a 737 [I know I'm probably hinting towards a 3 mile runway], has enough room to safely stop even well after the descision speed? If such is the case, what is the point of V1?
In other words, if there is a formula that factors runway length into the descision speed, what is it?
Thanks.
-Paul, down here at the young folks home
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RE: Question About V1
| Quoting Jumpseatflyer (Thread starter): V1 is the "commitment speed," at which the plane becomes obligated to fly |
Actually, you should more clearly define V1 as "decision speed" as this is the point at which if there are any difficulties with the take-off roll, then the a/c will be able to successfully stop before reaching the end of the runway. The pilots then have only a few second to make that "decision" to continue with or abort the take-off.
Trespassers will be shot; survivors will be shot again!
RE: Question About V1
| Quoting Jumpseatflyer (Thread starter): What if the runway is extremely long, and the a/c in question, say a 737 [I know I'm probably hinting towards a 3 mile runway], has enough room to safely stop even well after the descision speed? If such is the case, what is the point of V1? |
Also remember most takeoffs are not full-thrust. Airlines derate takeoffs based on temperature, runway length and conditions. So even on a long runway, you may eat a lot of it up.
RE: Question About V1
| Quoting Jumpseatflyer (Thread starter): My question: What if the runway is extremely long, and the a/c in question, say a 737 [I know I'm probably hinting towards a 3 mile runway], has enough room to safely stop even well after the descision speed? |
V1 is calculated according to many factors : weather, Runway conditions, weight, wind direction/force, outside temperature, etc ...
The case you decribe is very frequent on big airports : an A320 or a B737 or an ATR42 taking off from a 3900 meters Runway ...
In that case, V1 = VR most of the time ... which means that the pilots can abort the take off until the very end of their take off run.
RE: Question About V1
Attention ! Pun !
"V1" is a Fieseler Fi103 which itself did not have a "V1"-speed
http://en.wikipedia.org/wiki/V-1_flying_bomb
http://www.luftfahrtmuseum.com/htmd/dtf/fi103.htm
http://www.kheichhorn.de/html/body_fieseler_v1.html
Apart from my unfitting answer, the initial post might have been better off in forum "tech&op´s" ... ?!
Have fun,
-HT
"V1" is a Fieseler Fi103 which itself did not have a "V1"-speed
http://en.wikipedia.org/wiki/V-1_flying_bomb
http://www.luftfahrtmuseum.com/htmd/dtf/fi103.htm
http://www.kheichhorn.de/html/body_fieseler_v1.html
Apart from my unfitting answer, the initial post might have been better off in forum "tech&op´s" ... ?!
Have fun,
-HT
Carpe diem ! Life is too short to waste your time ! Keep in mind, that today is the first day of the rest of your life !