Calculating takeoff speeds
You are the pilot of a jet roaring down the runway approaching takeoff speed. Suddenly an emergency buzzer goes off, indicating a critical loss of oil pressure in one of the engines.
Do you keep accelerating, or do you try to stop the aircraft and stay on the ground?
Before a pilot begins the takeoff run, (s)he needs to know some important decision speeds. These include:
- VR – rotation speed, or the speed where the pilot pulls back on the control yoke and the front wheel leaves the ground
- V1 – takeoff decision speed, or the speed where the pilot is committed to go. It is safer to take off, rather than try to stop
- VRef – threshhold reference speed decision speed, or the speed crossing the runway threshhold, just before landing
Some of these are fixed for the aircraft type, while others depend on many variables, altitude, temperature, airplane configuration, weight, braking energy, and engine type. [See more on V Speeds.]
The following article is a “real-world math tutorial” from Kidwaresoftware.com:
Computing Airplane Takeoff Speeds (See the link towards the bottom – it’s a zipped MS Word file).
The tutorial requires “knowledge of second-order polynomials, hence should be grasped by Grades 9 and up”. Hope you find it useful.
Related posts:
- Crippled writer Newsday.com: Crippled JetBlue Airliner Makes Emergency Landing at LAX (Update:...
- Kane Dead Reckoning Computer The Kane Dead Reckoning Computer was a clever combination of...
- Matrices and Flash games This is an interesting tutorial on how matrices are used...
- Prius – Beginning of the End? I would love to see a world which is not...
- Road safety in Singapore Singapore's road safety does not stack up well compared to...
