Ground speed - the speed of the aircraft as measured along the Track. The other rule is in a Korean War display and is the black anodized style instead of bare aluminum. Felsenthal & Sons, the MB-4 was carried in a leather case printed with General Estes in black ink.
#Computer air navigation dead reckoning manual#
Track - the actual direction (course) over the ground as affected by the wind direction and speed.ĭrift angle is the angle between the intended Course and the true course (Track).ĭrift may be Starboard drift (to the right) or Port drift (to the left).Īirspeed - the speed of the aeroplane through the air and is measured along the Course. Type MG - 3 MIL - C - 25651 ( USAF ) Computer, Air Navigation, Cruise Control MIL - C - 6854A Computer, Air Navigation, Dead Reckoning, Type MB - 4. like my Air Corp rule, but is marked Computer, Air Navigation, Dead Reckoning, Type MB-6B.' It is also marked MFRS PART NO FAA-46C.' This is the same model rule used to illustrate the 1959 edition of the Air Force Manual on Air Navigation. An MB-4 dead reckoning computer is a type of slide rule used by aviators. To do this the estimated position can be corrected by comparing it with true position as determined, for example through celestial position determination using a celestial sextant.Ĭourse - the direction in which the aeroplane is heading relative to true north or magnetic north However once the position has become uncertain, e.g., through wind induced drift, the position must be corrected. Dead reckoning is very useful under conditions of limited visibility, when flying over territory with limited landmarks, e.g., over water, and when the sky is overcast. A refinement of the Dalton Mark VII Dead Reckoning Computer, the E-6B remains the most successful flight computer ever made. A concise and very enjoyable text covering the vast majority of aviation flight computers, complete with photographs, patent drawings, development, history and. MIL - C - 19729 ( Aer ) Computer, air navigation, cruise control 6605 MIL - C - 6854A A Computer, air navigation, dead reckoning, type MB - 4 Q6605. Notes Dead Reckoning is a method for determining the position of an aircraft or ship by keeping track of the direction and speed of travel from a known starting position.
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