7 hours ago, Vitold69 said:

How about updating information and data in FMC?

It does update automatic after you set a NEW alt and push the button to set this alt.

If you look after this action in your FMC's leg page it should be changed there aswell..

cheers 😉

On 11/11/2023 at 7:39 PM, BWBriscoe said:

Take off is really appalling in this aircraft. I follow all the weights from Simbrief, use the EFB to calculate speeds and trim. But still I get a tail strike every time. 

Some people out of their good hearts put together this aircraft package for absolutely free. You describing this as “appalling” is a bit too much.  Go to the devs dischord and raise the issue in a constructive manner. 

Flaps 10, and all the weights etc in the fmc and i have not had a problem, If anything a bit slow on rotation. But aren't all heavies../

 

18 hours ago, jon b said:

I’m presuming here that that function is simulated, I haven’t checked , but that’s how it should work anyway.

I had a flight in the 787 today and had a look....it's not simulated I'm afraid, sorry, but the same technique will work on the PMDG 777 and 747, when they finally arrive on the platform. 

8 minutes ago, jon b said:

I had a flight in the 787 today and had a look....it's not simulated I'm afraid, sorry, but the same technique will work on the PMDG 777 and 747, when they finally arrive on the platform. 

So then the HS 789 procedure is: Change altitude in altitude window. Push altitude knob.  Put new FL in VNAV FMC page. I'm just afraid the FMC doesn't recalculate T/D point. Next flight will try to note T/D place with help of FIX ring then change FL, update FMC and have a look does T/D changed or not.

Yes, you will have to manually type in the new cruise altitude if you stay at a lower cruise altitude than the one entered originally in the FMC. Pressing the alt selector doesn't work in the sim.

However, If you are going higher than the cruise altitude entered in the FMC then pressing the altitude selector SHOULD update the FMC , again I've not checked this , I'll take a look when I can.

You are correct, you want to be in VNAV PTH to get the FMC to calculate a TOD

12 minutes ago, jon b said:

Yes, you will have to manually type in the new cruise altitude if you stay at a lower cruise altitude than the one entered originally in the FMC. Pressing the alt selector doesn't work in the sim.

However, If you are going higher than the cruise altitude entered in the FMC then pressing the altitude selector SHOULD update the FMC , again I've not checked this , I'll take a look when I can.

You are correct, you want to be in VNAV PTH to get the FMC to calculate a TOD

Out of curiosity, does the QW 787 do it the right way?

@jcomm I can't honestly remember, it's been a while, but I suspect it does.

20 hours ago, jon b said:

or an easier way is to simply press that MCP altitude selector in, that’ll update the FMC for you and you’ll then see your FMA magically change from VNAV ALT to VNAV PATH.

In the 74 you have to type it into the box, assuming you haven't reached the cruise phase of flight yet. i.e. you're filed for FL370, and ATC tells you that 350 is going to be your final, you have to update the box. However, if you have gone to 370, and want to descent to 350, then as you know, you can press in the altitude selector and it'll enter cruise descent and stay in PTH. But until you enter the cruise phase, you've gotta put it in the box in order for it to change over to PTH. If the 78 does enable ALT intervene to force PTH before you have reached your initial cruise level, that's a nice feature, but I can see how it'd bite you.

44 minutes ago, V1ROTA7E said:

n the 74 you have to type it into the box, assuming you haven't reached the cruise phase of flight yet. i.e. you're filed for FL370, and ATC tells you that 350 is going to be your final, you have to update the box.

If you are LEVEL at 350 in VNAV ALT and you have 370 in the FMC then pushing the alt selector will update the FMC and put you into VNAV PTH, if you are still in the climb ie VNAV SPD then yes you need to manually update the box. (744)

1 hour ago, jon b said:

If you are LEVEL at 350 in VNAV ALT and you have 370 in the FMC then pushing the alt selector will update the FMC and put you into VNAV PTH, if you are still in the climb ie VNAV SPD then yes you need to manually update the box. (744)

ahh yes, that's correct. it's funny how much you dump when changing planes. though the 74 was a few types ago!

I’m glad you remembered because it doesn’t seem to be in the later editions of the FCOMs anymore so I’ve no way of backing it up with evidence ! 😄

I used to use it a lot leaving Florida when going straight into New York oceanic from Miami centre and we’d get a lower level than planned at the oceanic entry. It was a bit of a party trick because not a lot of the FOs knew it did that, it must have become a long lost forgotten technique .. a bit like a raw data NDB approach 

haha. good times. my favorite party trick was using P/P. On the newer heavies you've got TRK, but the P/P command was awesome, especially going into Narita when they would give us a track to follow all the time!

8 hours ago, jon b said:

I’m glad you remembered because it doesn’t seem to be in the later editions of the FCOMs anymore so I’ve no way of backing it up with evidence ! 😄

I used to use it a lot leaving Florida when going straight into New York oceanic from Miami centre and we’d get a lower level than planned at the oceanic entry. It was a bit of a party trick because not a lot of the FOs knew it did that, it must have become a long lost forgotten technique .. a bit like a raw data NDB approach 

I tend to either read your comments or watch "Subsonic Flight Training" vids 🙂 to Learn the details @jon b 

Subsonic Flight Training - YouTube

such as:

Ep 1 | TIMED TRAINING TIPS | VNAV ALT VS VNAV PTH - YouTube

Ep 2 | TIMED TRAINING TIPS | REMOVING ALTITUDE CONSTRAINTS - YouTube

Edited November 18, 20232 yr by jcomm

I’ve not seen those videos before, they look very well done.
Just  watching one reminded me just how good the PMDG 747s are and the depth of their simulation. I really hope they get the big Boeings across to MSFS soon.

I think I might blow the dust off my P3D V5 installation later and take the 748 for a spin.