What are the most ideal conditions for takeoff? Temperature and pressure.?

Question

What is the most desired temperature and pressure (or altitude).

I am wonfering about the temperature and altitude that requires the least fuel or runway length.

Answer 1

as cold and dry as possible and below sea level.

Answer 2

Ideal????? the environment is ever changing. The best conditions would be at sea level with cooler ambient temperatures and a strong headwind right down the runway. Standard pressure is 29.92 inches at 59 degrees F. anything above that would affect aircraft operational performance which can be determined using the proper graphs and charts or flight calculator. On the side of cooler temperatures performance does improve but I'm not sure if there may be a point that extreme cold air may have an adverse affect?

After reading your additional comments I take it that you are trying to detirmine an optimum pressure altitude and temprature where by a given aircraft design could, at a reduced powersetting conserving fuel match it's standard published takeoff specifications????? I know av gas is $4.10 a gallon here also but I won't go that far! LMAO don't forget to add a little air to the tire pressure.

Answer 3

The colder the temperature the better. The engines can produce the most amount of thrust with the coldest temperatures. They also operate the most efficiently with the coldest temperatures.

The greater the headwind component the better. This shortens takeoff and increases climb gradient.

The lower the pressure altitude the better. This maximizes the amount of air an engine can use to develop thrust with.

With a piston engine, the lower the relative humidity the better. With a turbine engine, it doesn't really matter.

Answer 4

The shortest takeoffs are performed when it is cold and high pressure. This means that an airport at sea level, or even below is the "most ideal". Cold is also good. First, engines operate better at colder temperatures, especially turbines. EGTs won't become a limiting factor as in 90+ degree weather. Even piston engines will enjoy a performance boost. Second, higher pressure means greater lift at any given speed (more air molecules).

Answer 5

Desired or best?
Actually all aircraft have the performance data done at what is called the ICAO Standard Atmosphere.
Altitude is Sea Level and pressure at 29.92 inches of Mercury
Air is 15 degrees Celsius and dry.
All calculations are done from these figures and adjusted to the altitude temp and pressure of the aerodrome.

Additional:
Depends on the aircraft.
Colder air works best.

Answer 6

Sufficient to get off the ground safely with the available runway. Any temperature and pressure altitude combination that calculates out to something less than the length of the runway is "ideal".

Aircraft will get off the ground with less ground roll at lower temperatures, pressures and humidity.

Answer 7

Best case scenario is low temperatures at sea level (or lower), you can also use a good headwind to help reduce the required runway length.

Worst case is hot and high with a tailwind.

As a pilot you have to take what you get. C'est la vie.

Answer 8

High pressure, low temperature, and low humidity (H2O weighs less than N2) these all add up to dense air the denser the air the better the performance

Answer 9

High Pressure and low temperature.
This will result in lower density altitudes.

Answer 10

Sea level, cold air