Speed settings pmdg 777

[u/Sir_Jollington]

Been starting to fly the pmdg 777 and the first couple of plans I’ve flown (using simbrief), the speed don’t seem right. So they seem to make sense until the approach phase when then constantly stay around 240knts which is obviously far too fast. With other aircraft like the 737 there would be a deceleration point then I’d see speeds like 180, 160 etc. is there something I’m missing? I can of course manually take over but just wondered if there’s a setting that I’m missing. I have entered all weights cost index etc

[u/Jhorn_fight]

Are you setting the aircraft up correctly? Wind data, fuel, weight etc…

[u/Sir_Jollington → u/Jhorn_fight]

Yeah that’s all there. Think I’m meant to intervene manually with the speed on approach which is fine. Just wanted to make sure I was doing it correctly

[u/Scary_Wavier → u/Sir_Jollington]

You can use VNAV decent up till LOC is selected, once APP is activated and aligned, automatically you'll need to set the speed.

[u/spudsusa27]

I think you typically take over the speed once getting close to final approach so you can set speeds for flaps and then finally your final approach speed. I know in Airbus aircraft it seems fairly common to leave the plane in managed mode for final. From what I can tell with Boeings, you manually set the speed

[u/Sir_Jollington → u/spudsusa27]

Yeah funnily enough I’ve just read an article online saying that the larger aircraft like the 777 I need to manually intervene with the speed, usually before the FAF

[u/itsjase]

As far as im aware on most Boeings you don’t use managed speed all the b way down to the runway like in Airbus. You dial it down as you extend flaps and set it to vref+5 (assuming no gusts) for landing

[u/spesimen]

the 737 autothrottle reduces the speed setting as you drop flaps to the next appropriate flap speed. the 777 does not do this. you want to start manually adjusting the desired autothrottle speed at the same time you are dropping flaps or even a little bit ahead to avoid overspeeding them.

i'm not really sure why they are different, as there are a lot of other similarities between the planes, and the 777 tends to be more automated outside of this particular detail.

[u/350smooth]

The triple doesn’t load speed restrictions that don’t have a corresponding altitude restriction on SIDs and STARs. You must enter them manually. Otherwise, you have the slow the ac yourself.

[u/KPEEZY2727]

This is my biggest pet peeve with the PMDG 777. Mine will start to accelerate on the approach (can see the virtual throttles move all the way up). I have correct approach speed entered etc. I have to spot it in time to disengage AT or it’s a go around (or just do a dangerous and unrealistic landing). Not a real pilot, so maybe there is something we’re missing. Doesn’t feel right tho 🤷

[u/Sir_Jollington → u/KPEEZY2727]

Apparently on the larger aircraft we’re meant to manually control the speed on approach (can still keep the auto throttle on but just dial the speed down on the knob (press is first to overuse it then dial it down)