MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 70
least once every five years and corrected for aimualMagnetic Variation Change. If no compass swinging base is available, an air-craft compass can be swimg by using a LANDINGCOMPASS to hne the aircraft up on the differentheadings. (U) Precautions Before Swinging 1. See that Compass Swinging Base is… … Fig. II. Compass Stvinging Base. 3. Check compass level and alignment in aircraft. 4. Remove corrector magnets (if old type correctorbox). 5. Check tires for even inflation. 6. Place aircraft controls in neutral and see that allequipment normally carried is placed aboard. 7. Hang plumb bobs from…
Airplanes
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