![]() |
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
|
#1
|
|||
|
|||
![]() "Dick" wrote in message ... Can a GPS with compass, heading & groundspeed capability be used legally in lieu of a separate compass and airspeed instruments on an experimental homebuilt airplane? Or at least in lieu of the separate compass? Thanks Short answer, no. The GPS is showing ground track, not heading, even though this information is displayed on the GPS as if it were a compass. That said, once I knew where I was going, which way I was pointing lost a lot of significance. The GPS "compass' shows where you are actually going. For the most part, ATC personnel are used to fast jets where the heading and track are essentially the same. Give them a Cub and a strong 90 degree crosswind and it gets interesting. They will say, "turn left, heading 270" clearly expecting the blip on their radar will move westward even though the Cub is fighting a stiff North wind while heading West and tracking Southwest. I fly gliders cross country and sometimes it is very important to track precisely toward a known safe landing spot. I use the GPS "compass" for this since it will steer me exactly over the intended point without any wind calculations at all. Compared to GPS, a magnetic compass is nearly useless. Bill Daniels |
#2
|
|||
|
|||
![]()
Golly!
You guys are all real nice. I'd have told him to go learn to fly... Troll O Meter 0 1 2 3 4 5 6 7 8 9 10 __________________________________________________ _ | | | | | | | | | | | --------------------------------------------------- ^ | |
#3
|
|||
|
|||
![]()
Thanks to everyone else.
BTW Richard, I do know how to fly and was addressing a "available space" problem on the panel. This led me to think about "glass" cockpits and redundancy on a Day/VFR mission; hence the question.. Dick |
#4
|
|||
|
|||
![]()
Buy a dynon.. 1800 bux and does it all..
Dave Dick wrote: Thanks to everyone else. BTW Richard, I do know how to fly and was addressing a "available space" problem on the panel. This led me to think about "glass" cockpits and redundancy on a Day/VFR mission; hence the question.. Dick |
#5
|
|||
|
|||
![]()
Dave S wrote:
Buy a dynon.. 1800 bux and does it all.. Then take a week off and go put some hours on it :-) Seriously, My horizon gyro was DOA and out of warranty from first flight on. Rather than replace it, I'm saving up for a Dynon and will chuck the horizon, VG, vacuum gauge, and vacuum pump. The compass stays g. BTW, who's got them for $1800? Dave 'MFD' Hyde |
#6
|
|||
|
|||
![]()
Dick wrote:
Thanks to everyone else. BTW Richard, I do know how to fly and was addressing a "available space" problem on the panel. This led me to think about "glass" cockpits and redundancy on a Day/VFR mission; hence the question.. Dick Then you already knew the answer. GPS track information is NOT the same as heading info. As a suggestion I'd trade off the gyro compass for a vertical card compass. That takes out most of the "whisky compass" foibles and is quite usable. Richard |
Thread Tools | |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Prop Pitch Question | Eugene Wendland | Home Built | 2 | April 25th 04 03:22 AM |
Question | Charles S | Home Built | 4 | April 5th 04 09:10 PM |
Aluminum instrument panel finish? | Richard Riley | Home Built | 31 | February 4th 04 02:09 AM |
Poly Dope Question | Michael | Home Built | 3 | January 29th 04 07:10 AM |
Tecumseh Engine Mounting Question | jlauer | Home Built | 7 | November 16th 03 01:51 AM |