And how is it related to the pitot-static system on jet airplanes?
2006-11-29 17:57:17 · 5 answers · asked by DallasCowboyy 1 in Cars & Transportation ➔ Aircraft
Like Bitburger, I have never heard the term, but I imagine you are referring to the system that senses an aircraft's current Mach number. If this is the case, it is definitely related to the pitot-static system. Mach is another form of airspeed indication. Airspeed indicators are driven by the pitot system (the probes pointing forward with small holes in front). They also use the static system (probes or spots on side of plane that are not facing into the airstream). These two sensors provide input to an Air Data Computer(ADC) to create Indicated Airspeed, which must be corrected for position error, either manually, or on most modern aircraft with a Digital Air Data Computer (DADC). Another function of the ADC or DADC is to take inputs from the Total Air Temperature Probe. It will convert this to a Static Air Temperature and use that, combined with the airspeed to develop a Mach number (ratio of speed to speed of sound). If an airplane is doing .75 Mach, it is moving at 75% of the speed of sound for the current temperature of air it is moving in.
2006-11-30 23:09:59 · answer #1 · answered by sc0tt.rm 3 · 0⤊ 0⤋
Most transducers convert a mechanical input (in this case a pressure) into an electrical signal. A Mach transducer converts the air pressure on the aircraft due to forward motion into a signal that can be used to determine the Mach ratio of the aircraft's speed.
Mach one varies with air density, which in turn varies with pressure and temperature. As the aircraft climbs, the air density drops approximately one inch per 1000 ft and temperature drops approximately 2 degrees C per thousand feet. Because of this Mach number must be calculated as a ratio of the air pressure generated by the forward motion of the aircraft against the static pressure of the atmosphere. To make it more complicated, the atmosphere is constantly changing in pressure and temperature as the aircraft moves through an air mass. Complications arise as the sensing system can be influenced by instrument error, primarily how the airflow around the fuselage of the aircraft influences the pressure being measured by the various sensors. These errors have to be carefully "mapped" and corrected - these days usually through algorithms working on the raw digital signals from the transducers.
The resultant Mach number is displayed to the pilots but is also used by various systems such as a Mach trim system
2014-08-25 15:32:29 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Never heard this particular term, but it probably attaches to the pitot system and converts the pressure to a mach number instead of airspeed in knots.
2006-11-29 23:30:41 · answer #3 · answered by Anonymous · 0⤊ 0⤋
It transduces the mach on jet air planes
2006-11-29 23:18:15 · answer #4 · answered by Anonymous · 0⤊ 0⤋
That requires a lot of mathmatical eqasions and your best bet is to ask an aviation electronics specialist.
2006-11-29 21:49:42 · answer #5 · answered by wazgold 1 · 0⤊ 0⤋