I was sat on a short-haul plane yesterday and as usual the acceleration at takeoff is pretty impressive. But how impressive is it compared to a car? I couldn't find anything on the internet. Also I'd be interested if anyone can figure out the difference between acceleration of short-haul and long-haul flights, as we know that big aircraft are much less... The other thing is what 'g' do you pull on takeoff and landing? Thanks!
2006-06-06 02:22:53 · 4 answers · asked by Lyndon H 1 in Science & Mathematics ➔ Engineering
I don't remember very well I but I red somwhere about a F1 car beating a F16 fighter on a 2km distance.
Let's take an example:
Roughly a 747 weight about 400tons and has 4 engines of 25tones of thrust. This would lead to a maximum acceleration of 0.25Gs at take off. I'm sure a fast car can do better than that
2006-06-06 02:32:45 · answer #1 · answered by bogdanstie 1 · 1⤊ 0⤋
It also depends upon how the takeoff was done. If the pilot sits in a somewhat high performance jet, locks the brakes, throttles up to a good percentage of power (say 80% or maybe more), then releases the brakes, the plane will jump to 100mph in just over a second--beating even the highest performance car made.
2006-06-06 02:47:17 · answer #2 · answered by quntmphys238 6 · 0⤊ 0⤋
Generally planes accelerate very slowly. The are very big and heavy. A boeing for instance take off at about 200 km/h And it takes about a 3 to 4 km stretch to reach. Any decent car would kill it. Jet how ever can be exceptionally quick. ie Locking brakes and launching on Afterburn. Wow, quick stuff.)
As for the G's. you would probably have more verticle than horizontal. Again on a boeing not a jet.
2006-06-06 10:20:18 · answer #3 · answered by Snag 1 · 0⤊ 0⤋
Acceleration at take off depend on a few parameters like
1.Weight of the aircraft.
2. Speed of Head wind/tail wind.
3. Type of aircraft wing design.
MPH is a measurement of speed not acceleration ( in SI unit it is m/s2). Basically you can't compare these 2 as car doesn't take off.
For Boeing 747 I guess it is around 100-120m/s2 will have enough lifting force to take off safely. Remember 747 usually fly at 500 mph.
A380 may need 150-180m/s2 as it is much heavier.
Big or small (commercial passenger jet) usually fly at 500mph.
2006-06-06 02:41:02 · answer #4 · answered by Ho K 3 · 0⤊ 0⤋