luizmonteiro - 1976 Standard Atmosphere Calculations Help - Page 2

Wind & Time-Speed-Distance

Weight & Balance

Radius of Action

Miscellaneous Calculations

Temperature Altitude Correction for Pressure Altitude Pressure Altitude QNH QFE Density Altitude Coud Base True Altitude True Airspeed Temperature Rise Mach Number Equivalent Airspeed

Magnetic Course Magnetic Heading Compass Heading True Heading Wind Triangle (TAS - HDG; GS - CRS; WS - WD) Cross / Head Wind Components Time - Speed - Distance Fuel - Time - Fuel Flow

Weight & Balance Sheet CG Shift CG % Aft of MAC CG from Datum Ballast Cargo Pallet Load

Intercepting Moving Target RA - Returning to the Same Base RA - Returning to Alternate Base RA - Returning to Moving Base RA - Returning to Moving Alternate Base

Climb & Descent Gradient Gliding Distance & Glide Ratio Rate of Turn Bank Angle Load Factor Pivotal Altitude Off-Course Problems Time to VOR Distance from VOR

1976 Standard Atmosphere Properties 1976 Standard Atmosphere Graphs

Weight & Force Mass Distance & Length Temperature Time Speed Pressure & Load Volume Area Power Energy & Work Flow (Volume) Flow (Mass) Angle Acceleration

Bank Angle for Standard Rate Turn - Physics and Math Mental Estimation of Wind Correction Angles

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Using the Standard Atmosphere Calculator (Continued...)

Example 2:
In Standard Atmosphere at what altitude is the pressure half of that at sea level? What is the temperature and pressure at that altitude?

The pressure ratio is the ratio between air pressure at a certain altitude and the sea level pressure. The ratio for the pressure to be half, or 50%, will be 0.50. Lets select the pressure ratio field and highlight it with the mouse.

Next, type in the 0.50 value.

As you finish entering the value, all the other properties are calculated for you, including the:

	a -	Altitude in feet which is 17985.6 or about 18,000 feet
	b -	The temperature in Celsius is -20.6021 ^oC or rounded up -21 ^oC.
	c -	The air pressure is 1.49606e+1 inHg or approximately 15 inHg.

In this case we entered data in the Pressure Ratio field, however you can enter information in ANY field, and as long as it is within the range or envelope of Standard Atmosphere. This means that you actually have 378 function combinations on this caluclator!

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