By Federal Aviation Administration (FAA)/Aviation Supplies & Academics (ASA)
The Aviation upkeep Technician Handbook—Airframe (FAA-H-8083-31) is one in all a chain of 3 handbooks for folks getting ready for certification as an airframe or powerplant mechanic. it really is meant that this guide give you the simple info on rules, basics, and technical systems within the material components in relation to the airframe score. observe: AC 65-15A Airframe and Powerplant Mechanics Airframe instruction manual IS present until eventually might 31, 2012. AFTER THIS DATE, THE AC might be outdated by means of THIS instruction manual quantity 2.
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Additional info for The Aviation Maintenance Technician Handbook—Airframe (FAA-H-8083-31)
Measuring altitude with a pressure measuring device is fraught with complications. Steps are taken to refine pressure altitude indication to compensate for factors that may cause an inaccurate display. A major factor that affects pressure altitude measurements is the naturally occurring pressure variations throughout the atmosphere due to weather conditions. Different air masses develop and move over the earth’s surface, each with inherent pressure characteristics. These air masses cause the weather we experience, especially at the boundary areas between air masses known as fronts.
0 863 altimeter position error to a minimum. 5 392 the pressure inside and outside the diaphragm are the same. The dial is usually graduated in 100s of feet per minute. A zeroing adjustment screw, or knob, on the face of the instrument is used to center the pointer exactly on zero while the aircraft is on the ground. L. 5 5 DOWN I 4 3 Zeroing adjustment screw 2 Figure 10-36. The effect of air temperature on aircraft performance is expressed as density altitude. Vertical Speed Indicator indicator shows the rate of climb or An analog vertical speed indicator (VSI) may also be referredFigure Figure3-10.
By putting the current known air pressure (also known as the altimeter setting) in the window, the instrument indicates the actual altitude. This altitude, adjusted for atmospheric pressure changes due to weather and air mass pressure inconsistency, is known as the indicated altitude. It must be noted that in flight the altimeter setting is changed to match that of the closest available weather reporting station or airport. This keeps the altimeter accurate as the flight progresses. While there was little need for exact altitude measurement in early fixed wing aviation, knowing one’s altitude provided the pilot with useful references while navigating in the three dimensions of the atmosphere.