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FPM vs ANGLE for descent |
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oskrypuch 
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Joined: 09 Nov 2012 Location: CYFD Status: Offline Points: 3058 |
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 Topic: FPM vs ANGLE for descentPosted: 25 Apr 2023 at 9:33am |
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Noticed this option with 10.3, perhaps to support the new VNav, which unfortunately I can't use as it is disabled for non-550 untis. I normally set a FPM target to chime the TOD gong. I'm wondering if using ANGLE might be better, or perhaps it won't really work, as I don't have VNav available (or set). I presume that both methods take into account the instantaneous winds by using GS, and the difference is just a bit of arithmetic. Anyone using 10.3 for a while, what do you do? * Orest
Edited by oskrypuch - 25 Apr 2023 at 10:38am |
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Sanjiv
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Joined: 20 Nov 2016 Location: N14 Status: Offline Points: 48 |
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Posted: 02 May 2023 at 8:29pm |
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I'll test mine this week. Enroute VNAV enabled in setup menu (not settings)? From user manual it seems that FPM is eventually converted into angle for guidance. (page 6-38)
"When a target vertical speed is specified, the IFD will compute the TOD point using current groundspeed and the desired descent rate. However, when the aircraft reaches the TOD point and enroute VNAV is allowed, the IFD will compute the angle required to reach the desired altitude, then commence with enroute VNAV using that angle. "
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PA28-236 @N14
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Gring
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Joined: 30 Dec 2011 Location: Kingston, NY Status: Offline Points: 722 |
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Posted: 03 May 2023 at 7:28am |
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Orest,
After a bit of playing, I went back to a FPM value. This allows me to set the autopilot, or hand fly with a known target value for vertical speed.
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MysticCobra
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Joined: 29 Jan 2013 Status: Offline Points: 652 |
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Posted: 03 May 2023 at 11:50pm |
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Does it really matter, if you're using the Boeing Banana as your guidance?? ;-)
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oskrypuch
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Joined: 09 Nov 2012 Location: CYFD Status: Offline Points: 3058 |
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Posted: 06 May 2023 at 9:39pm |
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The Banana rules! * Orest |
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