The R.C. ALLEN Attitude Gyro Model 26 "K" incorporates tremendous advances in presentation, precision, and reliability. The attractive new extended color schemes and realistic spherical display virtually obsolete any other attitude gyro. With the ultra-precise spherical presentation, old parallax problems have been eliminated.
In this unit, RC Allen has combined the most recent technological and human factors engineering concepts to produce the new standard for safety. These gyros provide a more accurate IFR reference for the beginning instrument pilot or a Cat II captain. A new three phase motor/inverter is designed into the gyro enabling it to operate at lower temperatures which extends to useful life.
The instrument employs a new, high precision air erection system which provide erection torque for maintaining a proper vertical alignment reference. The erection air is supplied by a turbine pump which is integrally coupled with the gyro motor. Through maximum utilization of unitized construction the design is free of resonant frequencies below 100 HZ and thus cannot respond to low frequency disturbances which can cause dither and premature wear out of this unit.
The display portion of the instrument has a directly coupled roll movement, and a pitch movement mechanism identical to that of the field proven vacuum gyros produced by R.C.Allen since 1966. A "pull to cage" spring type force limited mechanism assures immediate alignment and stability whenever power has been applied to the gyro, a feature non-existent on vacuum driven gyros.
The artificial horizons have a hybrid inverter which converts the aircraft DC power to the required voltage and frequency for motor operation. A power failure flag drops into view whenever the supply voltage is lost or when the voltage has dropped below a level of acceptable for proper operation of the gyro.