Manuel Sabater 1136202 Posted January 23, 2010 at 11:04 AM Posted January 23, 2010 at 11:04 AM Can someone please tell me how to set up the QFE or QNH on a aircraft? I am using the Cessna 172 Thanks Link to comment Share on other sites More sharing options...
Romano Lara Posted January 23, 2010 at 11:48 AM Posted January 23, 2010 at 11:48 AM There is a knob on your altimeter, basically you rotate it. If you're using VATSIM weather and lazy like me, simply hit B and it will correct the altimeter setting for you. Romano LaravACC Philippines, Manager - Training & Standards Link to comment Share on other sites More sharing options...
Manuel Sabater 1136202 Posted January 23, 2010 at 12:26 PM Author Posted January 23, 2010 at 12:26 PM Hi romano Many thanks. I new about setting QNH on the altimeter knob but I was confused about the QFE. Cheers Link to comment Share on other sites More sharing options...
Ruth McTighe 824054 Posted January 23, 2010 at 01:06 PM Posted January 23, 2010 at 01:06 PM You set the QFE exactly the same way as you do the QNH, i.e. turn the altimeter knob to the right number. The difference is the resulting figure the altimeter needle points to. For QNH it's the number of feet above mean sea level (the altitude), for QFE it's the number of feet above the aerodrome level (the height). So for example, if you were on the ground at Biggin Hill (EGKB) with the QNH set your altimeter would read 600ft, but if you'd set the QFE it would read 0ft Ruth McTighe Heathrow Director, Essex Radar, Thames Radar, London Information [Mod - Happy Thoughts]t webmistress CIX VFR Club http://www.cixvfrclub.org.uk/ Webmistress Plan-G http://www.tasoftware.co.uk/ Now not a VATanything Link to comment Share on other sites More sharing options...
Ivan Kovacevic 920456 Posted January 23, 2010 at 01:30 PM Posted January 23, 2010 at 01:30 PM If you're using VATSIM weather and lazy like me, simply hit B and it will correct the altimeter setting for you. A very wrong approach for any place other than USA, since pressing B in Europe anywhere between 6000ft and 18000ft would likely* result in an error in procedure, and possibly loss of separation with other traffic. * N.B. Transition altitudes vary in different countries. Link to comment Share on other sites More sharing options...
Romano Lara Posted January 23, 2010 at 02:17 PM Posted January 23, 2010 at 02:17 PM A very wrong approach for any place other than USA, since pressing B in Europe anywhere between 6000ft and 18000ft would likely* result in an error in procedure, and possibly loss of separation with other traffic. My reply was intended to answer the op's question in general, regardless of the country he is in, answering his question on how to set his QFE/QNH on his panel. Romano LaravACC Philippines, Manager - Training & Standards Link to comment Share on other sites More sharing options...
Dave James 1018738 Posted January 24, 2010 at 02:07 AM Posted January 24, 2010 at 02:07 AM Additionally Manuel, When given the QNH/QFE in millibars (which you will in the UK), if your C172 Altimeter only shows inches (inHg) on the subscale, as a rough guide, divide the millibars by 33.85 to give you inches. David James VATSIM Screenshot Contest Coordinator Intel Core 2 Quad CPU Q6600 2.4gig, RAM 3.25gig, ATI Radeon HD4800, XP Pro SP3, FS9.1 FSnav FSinn VRC Link to comment Share on other sites More sharing options...
Alistair Thomson Posted January 30, 2010 at 01:56 AM Posted January 30, 2010 at 01:56 AM Additionally Manuel, When given the QNH/QFE in millibars (which you will in the UK), if your C172 Altimeter only shows inches (inHg) on the subscale, as a rough guide, divide the millibars by 33.85 to give you inches. Divide by 33.85 as a rough guide! Great stuff. Alistair Thomson === Definition: a gentleman is a flying instructor in a Piper Cherokee who can change tanks without getting his face slapped. Link to comment Share on other sites More sharing options...
Recommended Posts