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-   -   Perth - speed up - slow down (https://www.pprune.org/australia-new-zealand-pacific/624218-perth-speed-up-slow-down.html)

machtuk 6th Aug 2019 05:12


Originally Posted by Capt Fathom (Post 10536852)
Generally having your mate suddenly decide to show you how it's done would get your attention. :=

You missed the point! Why do some always twist things around in here to make them feel good?
For the benefit of others who aren't judgemental. My briefing did include a possible hand flown App. When I disengaged the A/P I also disengaged the A/T.
My point was that it showed this particular Capt most likely wasn't confident to hand fly himself hence his "oh sh1t" reaction!

Angle of Attack 6th Aug 2019 06:13

[QUOTEOK, fair enough. I have had the same with QF 737s. Dunno why they can't cruise at somewhere near their descent speed. Perhaps they're using RTA...][/QUOTE]

Because there is a few misguided pilots on the 737 that always say it’s most efficient to fly at Optimum and don’t want to descend when given a slow down, sure it’s most efficient for range but range isn’t the issue if you have a slowdown. If your at optimum like most you can hardly slow down at all, mid to high twenties is the far best altitude for slowing down, holding etc, as long as there’s no weather etc at that level.

Blueskymine 6th Aug 2019 07:12


Originally Posted by machtuk (Post 10537797)
You missed the point! Why do some always twist things around in here to make them feel good?
For the benefit of others who aren't judgemental. My briefing did include a possible hand flown App. When I disengaged the A/P I also disengaged the A/T.
My point was that it showed this particular Capt most likely wasn't confident to hand fly himself hence his "oh sh1t" reaction!

His ‘oh ****’ comment wasn’t the fact he was not confident in his ability to fly autothrust off, but more than likely his confidence in YOU flying it. Remember - the buck stops with the 4 stripes in the left even if it was your fault. They will be soc’d and face the sim and retraining. It also helps if you brief a/thr off.

Just ask two captains recently who had bad days with the same FO capturing the GS from above and subsequent go arounds. Not pretty.

Capn Bloggs 6th Aug 2019 11:37


If your at optimum like most you can hardly slow down at all, mid to high twenties is the far best altitude for slowing down, holding
Just like the 7x7 FCOM says... :ok: Probably the Fokker one too!

amberale 6th Aug 2019 11:49


Originally Posted by Capn Bloggs (Post 10537076)
OK, fair enough. I have had the same with QF 737s. Dunno why they can't cruise at somewhere near their descent speed. Perhaps they're using RTA... ;) You could just demand a descent from ATC. That'll scare the f@kkers.



:D :ok:

And here is the whole problem.
All of you Fockers have different profiles and all want priority.
If you are 5,000ft above profile then you aren’t going to be able to maintain your companies registered profile speeds inside 30nm.
You will then get stuffed around by APP.
What else are we supposed to do???
Even if you were all driving Bongo737s or scarebus A320s you would fly them differently and need to be “adjusted”.

Bloggs you are correct about the close in departures and then add CB-ML, TWB-BN type flights which all have the same priority as the sky gods and you can guess the complexity.
Try to chill and work together, if the guy in front of you looks like the are going to impede your descent ask for a vector ffs.

neville_nobody 6th Aug 2019 14:09


Try to chill and work together, if the guy in front of you looks like the are going to impede your descent ask for a vector ffs.
Problem is we don't know they are there until we start descent. Then we get vectored off and have to speed up our descent with thrust on to make our time. I have also seen this scenario totally confuse ATC as they have the aircraft 2 minutes apart at the fix but virtually on top of each other. Constant IAS all the way from everybody would probably fix the problem but the Fokkers don't seem to do that for whatever reason.

34R 6th Aug 2019 22:41

If there are crews that are providing false times in an attempt to minimise their delay, and other crews that have no intention of meeting a time and leaving it to ATC to sort out, is there any wonder then of the speed up slow down scenario??

Some of you seem to be going out of your way to contributing to the problem you are so vehemently complaining about!

Blueskymine 7th Aug 2019 01:18


Originally Posted by neville_nobody (Post 10536948)
F100 is 2 minutes in front of us on feeder time, but blocking our descent clearance. We can't do anything as any change in speed will mess our feeder time. So we are left high and dry waiting for the F100 to start descending and accelerate away.

It appears that the F100 flies slow in the cruise but then accelerates the descent to meet their time. Obviously if they are late on their time the more an issue it is for the following aircraft. I have had it a few times now, so it wasn't just a one off event where someone got their time wrong.

The old Fokker has a slow cruise Vmo, but she boogies at the crossover and at this point can match it with an IAS similar to modern jets.

So I guess that’s how they play their game. Personally I’d descend earlier and fly at the crossover for longer if I was driving one, so as not to disrupt the flow behind me. But it would seem a 2:1 profile is pretty common on the things. I’d regularly see one 10K above me 5nm in front. They’d at some point cross through our level and be below us.


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