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JSACKS

Going from VNAV ALT back to VNAV for climb....

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When I am climbing and enter VNAV ALT and level off at the existing MCP ALT, after I enter the new MCP ALT cleared by ATC, I press the ALT button once to revert to VNAV climb. This works. But why do I have this thought going round in my head that if I hit that same white ALT button in some other way, it wipes out the next restriction ahead and above me during a VNAV climb? Jonathan


Jonathan Sacks

Dell XPS Gen 4, Pentium IV Northwood extreme 3.8Ghz, 3Ghz RAM, eVGA 7900 GTO,

12 GoFlight modules plus MCP-PRO AP and EFIS, GF pedestal, CH rudder pedals,

CH throttle quadrant, 42" LG LED, 24" DELL LCD, Windows XP, FS2004, FSUIPC 3.96

FS Autostart 1.1 (Build 11), FS Navigator 4.6, UT, FE, GE, REX, PMDG, Level-D, PSS, etc.

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>head that if I hit that same white ALT button in some other>way, it wipes out the next restriction ahead and above me>during a VNAV climb? Not sure what you mean "hit in some other way", it is true that hitting this button multiple times is supposed to erase some other altitude restrictions - as the manual explains in better detail.Michael J.http://www.precisionmanuals.com/images/forum/pmdg_744F.jpghttp://sales.hifisim.com/pub-download/asv6-banner-beta.jpg


Michael J.

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I think I got it: if you have an FMC alt restriction between your current ALT and the alt you set into the MCP, hitting the ALT button erases the FMC restriction in a VNAV climb. Before I re-learned this tonight, I had a restriction ahead but it was HIGHER than my MCP ALT and I was puzzled why it wasn't getting erased, hah !Jonathan


Jonathan Sacks

Dell XPS Gen 4, Pentium IV Northwood extreme 3.8Ghz, 3Ghz RAM, eVGA 7900 GTO,

12 GoFlight modules plus MCP-PRO AP and EFIS, GF pedestal, CH rudder pedals,

CH throttle quadrant, 42" LG LED, 24" DELL LCD, Windows XP, FS2004, FSUIPC 3.96

FS Autostart 1.1 (Build 11), FS Navigator 4.6, UT, FE, GE, REX, PMDG, Level-D, PSS, etc.

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Guest D17S

Makes perfect sense. Nice find. What's next!?

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>>>When I am climbing and enter VNAV ALT and level off at the>existing MCP ALT, after I enter the new MCP ALT cleared by>ATC, I press the ALT button once to revert to VNAV climb. >This works. But why do I have this thought going round in my>head that if I hit that same white ALT button in some other>way, it wipes out the next restriction ahead and above me>during a VNAV climb? >>Jonathan Simple, simply push the VNAV button once AGAIN instead of the alt inter knob.................Randy J. Smith................A PROUD MEMBER OF THE PMDG BETA TEAM[h4]Evolution is a process that results in heritable changes in a population spread over many generations[/h4]


Randy J Smith

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