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remcoso

Speed caculations and forecast on legs page

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Fist want to say what a grat product!! Very nice to fly with!

 

But have a question..

 

On my flight during the appoache there was no caculations on speed.

 

One fix on the app path i give speed restriction of160. A point before that one the speed stays automatically on 240, which a bit high too reduce in 4nm to 160kt.

 

And also the app ref speed that shows on legs page was 170kt. But on the app reference page i set 25/136.

 

Maybe this are real world behaviors or i did something wrong.

 

Note: this flight was completely setup. Evey weight and data was filled.

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Check your LEGS page. If constraints aren't matching up with the approach plates, enter/correct them manually. 

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Also browsing thru the manual states that vnav wont go below 170kts, you have to use speed intervention for approach speeds.

 

Also for speeds below 240, you will need flaps so you should dial in the speed on the mcp and drop the appropriate flap

 

Pierre

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This is not a bug, please read the Intro manual and Tutorial where this is explained multiple times.

The 777 FMC does not function like the 737's - it will not automatically slow to approach speed. The 170 knot speed (or whatever you enter in) at the runway is *advisory only* and the pilot must use speed intervention in VNAV PTH to slow down.

 

Please fly the tutorial flight, it's all detailed there.

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