4 ms·
OK but the vacuum gyro in said raggedy-ass 172 needs setting against something as part of the checklist (and quite possibly in flight), which today is the magne
by NovemberWhiskey 5y ago
OK but the vacuum gyro in said raggedy-ass 172 needs setting against something as part of the checklist (and quite possibly in flight), which today is the magnetic compass.
- RNCTX 5y agoYeah, but this is really only applicable to VFR-only airplanes (mostly trainers). I doubt there are many people really traveling in airplanes without any sort of precision nav equipment. Practically, it doesn't matter which direction the gyro points as long as you are receiving a VOR signal or GPS signal on a VFR flight. And yeah, a lot in flight. By definition those gyros are gonna be old, and they cost more to overhaul than they're worth so people who are too cheap to go buy an electronic replacement replace used for used off of eBay or the local radio shop's junk shelf. They're not gonna be reliable, at all. But, for VFR purposes it doesn't matter and for IFR purposes you shouldn't be flying such an airplane with such equipment IFR anyway, so...
- FabHK 5y agoRight. And then you'd have to apply a correction (which might change a tiny bit over several hundreds of miles flown, or over the years). But no need to change anything in the aircraft, as far as I can tell. Just planning and procedures.