Heisann!
Naa er kanskje dette ogsaa diskutert i den andre traaden
MOW refererer til, men her er et utdrag av en "typisk" B737
AFM;
Quote:
...The most optimum and consistent landing performance is achieved through the use of a stabilized approach. The optimum stabilized approach is defined as a flight on the glidepath (visual or electronic) at a steady rate of descent, on the “target” approach speed, in the landing configuration, in trim, and with the proper thrust setting. The dynamics of flight often dictate that flight parameters will vary from optimum. However, experience has shown that a stabilized approach is essential for a safe operation.
Approaches will be considered unstable, and result in a missed approach if:
1) The airspeed is greater than +15 knots or less than –5 knots from target
speed, OR
2) Vertical speed is greater than 1500 ft/min., OR
3) Engines are less than minimum spooled. ( At least 40% N1)
For aircraft operating in VMC, these parameters must be met before reaching 500 ft. above touchdown zone elevation. In IMC, these parameters must be met before reaching 1000 ft. above touchdown zone elevation, or a go-around will be announced by the Pilot Monitoring
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Naa har vi hatt innlegg fra to piloter, men jeg ser fortsatt ikke en enkel forklaring paa hvorfor dette "anbefales"...? FBU 4EVER nevner energi i flyet og garantert landing og det er vel dette som er grunnen til denne anbefalingen...? En turbofan motor har relativt lang spool-up tid fra idle og finner du deg 500 til 1000 fot over bakken med motorene paa idle og av en eller annen grunn trenger mere thrust eller maa avbryte landingen kan det ta lengre tid foer du oppnaar tilstrekkelig thrust.
Dag