![]() Sometimes 2 or 3 cycles of adjustment in each direction, with the error halved each time, will further improve the compensation. The same procedure is then repeated on the east-west headings. The aircraft is then rotated to north again and the residual observed error reduced by half. Let us assume that it shows 10° off south the north-south compensation is then adjusted to reduce this error to one half its, or 5°. The north-south compensating screw is then turned until the compass ready exactly north. The aircraft is then pointed to north with all electrical equipment turned in and operating, an the fuselage placed in flying attitude. The process of making this adjustment is called "swinging the compass" and it is done by setting up the aircraft in a position of the ground where directions are accurately known. The magnets are usually adjusted by means of a screw driver, preferably or brass or fibre. These errors, called deviation errors, can be minimized by small compensating magnets built in the compass. Normally in any installation there will be errors caused by residual magnetism in nearby components of the aircraft. When compasses are installed on any instrument panel, care should be taken to see that are as far as possible from radios, electric motors (such as the panel vibrator, or wires carrying heavy current. The compensation is by means of magnets permanently installed in the compass, with adjustment effected from outside by means of 2 set screws. Non magnetic mounting nuts and bolts included.Compass Technical Note:įor cockpit installation or alternative on top of the instrument panel. The Airpath C 2300 can be panel or coaming mounted and requires a 57 mm cut-out. ![]()
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