Swinging the compass
Posted: Tue Sep 19, 2023 11:48 am
by Bryan Cotton
Hey all,
I know for a compass swing it’s supposed to be tail level, engine running. Anybody swing the compass with the engine off? I’m wondering if that has much effect with our weak electric systems.
Re: Swinging the compass
Posted: Tue Sep 19, 2023 4:34 pm
by kmacht
Seems easy enough to check. Next time you are at the airport find an empty taxi space and compare the compass readings facing various directions with the engine on and off while sitting in the cockpit You will need an actual compass rose location at the airport to fill out the compass deviation card but just checking on the ramp informally will tell you if the engine has any affect.
Re: Swinging the compass
Posted: Tue Sep 19, 2023 4:58 pm
by Bryan Cotton
Good idea Keith, thanks.
Re: Swinging the compass
Posted: Tue Sep 19, 2023 7:38 pm
by Panther16
If you have an EFIS with an AHRS and did the calibration procedure I wouldn’t worry about a compass rose, use that for your reference.
Keith Rhode
Sonex 214KE
Re: Swinging the compass
Posted: Tue Sep 19, 2023 8:00 pm
by Bryan Cotton
Panther16 wrote:If you have an EFIS with an AHRS and did the calibration procedure I wouldn’t worry about a compass rose, use that for your reference.
Keith Rhode
Sonex 214KE
Compass:
Panel:
The MFD is a Braüniger Alpha MFD. No navigation ability.
Mostly I use my phone or tablet to navigate. I’m looking for a backup.
Re: Swinging the compass
Posted: Wed Sep 20, 2023 12:44 am
by Skippydiesel
I have a very small (two systems) amount of experience with EFIS compass swinging - Both required all four cardinal points to be entered - WHY?
Surely the electronic gizmo can work out 45, 90 & 270 degrees from one set direction?
Okay, do one additional cardinal point, as a check - should be enough.
Anyone like to explain? (simple language please)