How fast does a plane have to be to raise off of the ground???

Question

How many miles per hour

for an average sized plane

a medum sized passanger plane that woulf fly...
lets say a two hour trip

i am not going to give you ppl any more details cuz i dont know anything about planes!!

I was just curious

Oh,

and its about 70 degrees outside with no wind

DOES ANYBODY READ THIS THING???

I AM JUST CURIOUS PEOPLE!! IDK ANYTHING ABOUT PLANES!!

in miles plz

IN MILES PPL

READ THIS THING ONCE IN A WHILE!!

Answer 1

It completely depends on the weight of the plane.

Answer 2

It all depends on the plane, weight, wingspan, wingcord, and the shape of the airfoil used in the specific application, for example, I have an r/c j-3 piper cub, with an 80 in wingspan, it rotates at about 25 mph, I also have an r/c Japanese Zero, it has to get up to about 65 mph before it rotates. Drag can also be an issue, a thick airfoil produces alot of lift but induces alot of drag. I would say that the most important factors are total wing load per square foot of wing and design factors.

Answer 3

A medium sized airplane (Like a 737) would probably rotate at about 115knots (about 130 mph or so) but that can vary significantly depending on how much fuel and how many passengers ar aboard. A 747 would be quite a bit higher as it is a much heavier aircraft and therefore requires more airflow over the wings to generate enough lift to fly.

Answer 4

I'm going to give an answer according to the following:
- a fighter jet (e.g. F-16C; I'm qualified in this plane);
- a boeing 747 passenger airliner.

I won't go into specifics like what a pilot will do, what verbal signals he/she will call out because its irrelevant to how it works.

Basically, the overall weight of the aircraft, which is the following:
- total weight of fuel (internal + external, if any);
- weight of aircraft;
- external stores (eg. weapons, for fighters);

For a F-16, the take-off speed is 180kts (average). In the Air Force, we calculate that depending on the configuration loadout we are using.

For a 747, that depends on the engines used and the amount of passengers and cargo on-board, but the barest minimum take-off speed is from 195kts - 220kts.

Winds (and crosswinds) will also affect take-off speed, including other environmental conditions like ice and snow etc.

Answer 5

The answer to this depends on what speed you are talking about. Aircraft work in airspeed - the speed of the aircraft in relation to the air around it. Ground speed is a function of these two things.

An aircraft's performance is based on its airspeed.. So most aircraft can take off at around 150kts airspeed (about 170mph), some slower, some faster. What this equates to on the ground, though, is dependent on wind speed.

Wherever possible, an aircraft will always take off and land into the wind.

Example: an aircraft is facing into 20kt winds. At its current weight, the aircraft has a takeoff speed of 140kts. For it to reach 140kts airspeed, it will need to be doing 120kts groundspeed. This, plus the 20kt headwind will give it a total airspeed of 140kts.

The same plane taking off with the wind (facing away from the wind) would need to build up a ground speed of 160kts to overcome the 20kt tailwind.

Answer 6

every plane is different i fly some cessna's that will creat lift at about 40 knots but some of the others take 70 knots there is a factor that makes it a little harder for the plane to take off as aposed to maintaining lift that question vary in so many ways that it really can not be answered "right" the weight the wind every thing makes a huge differance
for instance if the wind is coming at you at 15 knots you can lift off at 15 knots less than is it were not....ect ect

Answer 7

Depends on many things such as the strengh of headwind, or tailwind and weight of aircraft, amount of parasite drag, induced drag, amount of lift provided by the wings.

A Boeing 747-400 Heavy would rotate at about 180kts, Concorde would have required a much high speed of about 230kts due to the delta wing design, whilst a Cessna 152 has a book minimum speed of 55kts.

Answer 8

Depends on the planes weight, lift,drag,and a whole lot of other things.Small planes,not very fast.Bigger planes a lot faster. While in the air if the plane drops below this speed it's called reaching stall speed and will ultimately fall out of the sky.

Answer 9

Depends on the size and weight of the plane, its wingspan, and aerodynamics.

A small single-engine plane will start to rotate at around 75 mph
A jetliner's front wheel will lift off at over 120 mph

My foot-launched hang glider will pick me up at 19 mph airspeed.

Answer 10

Depends upon the plane. There is NO average. Anything from about 45 MPH to 180 MPH.

Answer 11

As everyone has said, it depends. For your statement about not knowing anything about aircraft, I would recommend getting the Boy Scout book (I believe a merit badge type book) on this subject. It gave me, when I was young, a great understanding of what made an aircraft fly. Available, I would think, at any library, for free.