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737_800

pmdg dc-6 doesn't speed up in cruise

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Hi,

I am flying with the AFE and am at cruise but the aircraft doesn't speed up, it stuck at 271 kt. GS. I deactivated AFE Cruise Mode and pushed the throttle full forward.

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When leveling off, keep the climb setting to accelerate then when the cruise speed is reached, set the cruise setting.


Dominique

Simming since 1981 -  4770k@3.7 GHz with 16 GB of RAM and a 1080 with 8 GB VRAM running a 27" @ 2560*1440 - Warthog HOTAS - MFG pedals - MFS Standard version with Steam

 

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271 GS is not bad. If I wanted a little more speed I would put the aircraft on a descent 


Dominique

Simming since 1981 -  4770k@3.7 GHz with 16 GB of RAM and a 1080 with 8 GB VRAM running a 27" @ 2560*1440 - Warthog HOTAS - MFG pedals - MFS Standard version with Steam

 

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GS can depend on the winds at your flight level, direction and speed. A GS of 270 knots sounds pretty normal to me unless you have a very strong tail  wind.  Common airspeed in MPH is 310. That is exactly 271 Knots. 

Edited by Bobsk8

Bob Cardone         MSFS 2020     PMDG DC6  JF Arrow, Carenado Seminole , Mooney

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1 minute ago, Bobsk8 said:

GS can depend on the winds at your flight level, direction and speed. A GS of 270 knots sounds pretty normal to me unless you have a very strong tail  wind. 

Sorry I meant it's like 205knots Indicated Air Speed. I would like to fly with 280-300kn to save some time.Maybe I need to decend to speed up a bit, right now at FL180.

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6 minutes ago, 737_800 said:

Sorry I meant it's like 205knots Indicated Air Speed. I would like to fly with 280-300kn to save some time.Maybe I need to decend to speed up a bit, right now at FL180.

When I climb to cruising altitude, I leave climb power on for about 10 miles, to allow aircraft to accelerate, before switching to cruise power. 


Bob Cardone         MSFS 2020     PMDG DC6  JF Arrow, Carenado Seminole , Mooney

TrackIR   Avliasoft EFB2    ATC  by PF3    FlyVirtual.net  CLX PC

 

 

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I also go a few hundred feet above my cruise altitude and then put it into a 100-200fpm descent while on climb power just to help it build up speed a bit quicker before switching over to cruise power. I think Allied bombers during WW2 did something similar.

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14 minutes ago, Tektolnes said:

I also go a few hundred feet above my cruise altitude and then put it into a 100-200fpm descent while on climb power just to help it build up speed a bit quicker before switching over to cruise power. I think Allied bombers during WW2 did something similar.

I had forgotten about this. Thanks for the reminder.


Dominique

Simming since 1981 -  4770k@3.7 GHz with 16 GB of RAM and a 1080 with 8 GB VRAM running a 27" @ 2560*1440 - Warthog HOTAS - MFG pedals - MFS Standard version with Steam

 

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Your cruise sounds about right for what it should do on average. Have to remember cruise isn’t max performance. If you want faster, make sure your super chargers are in high, and push the mp up. Of course you are going to chew through gas that way though.

Edited by CaptainNick

Nick Silver

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52 minutes ago, CaptainNick said:

make sure your super chargers are in high

My bet is on this one. IIRC the AFE doesn't switch the superchargers to high gear when passing 16 000 ft ; did you do it ?

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I dunno if the AFE uses the superchargers, so this might be something to do with it. Personally I do all that malarkey myself and if you get the thing up high enough, you can get it right up near Vne no problem, especially in a slight descent.


Alan Bradbury

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1 hour ago, Haddock69 said:

My bet is on this one. IIRC the AFE doesn't switch the superchargers to high gear when passing 16 000 ft ; did you do it ?

The AFE does not switch superchargers on, pilots job.

 


Bob Cardone         MSFS 2020     PMDG DC6  JF Arrow, Carenado Seminole , Mooney

TrackIR   Avliasoft EFB2    ATC  by PF3    FlyVirtual.net  CLX PC

 

 

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44 minutes ago, Chock said:

I dunno if the AFE uses the superchargers, so this might be something to do with it. Personally I do all that malarkey myself and if you get the thing up high enough, you can get it right up near Vne no problem, especially in a slight descent.

It won't turn them from low (default setting) to high, but according to PMDG's video on the superchargers the AFE will swap them from High to Low at the appropriate time during the descent phase.


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6 hours ago, 737_800 said:

Sorry I meant it's like 205knots Indicated Air Speed. I would like to fly with 280-300kn to save some time.Maybe I need to decend to speed up a bit, right now at FL180.

No DC-6 will ever do 280 knots indicated airspeed at FL180 / that would be a true airspeed of almost 380 knots at that altitude. 205 IAS at FL180 is 280 knots TAS, which is well within the DC-6 performance envelope.

Edited by JRBarrett
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Jim Barrett

Licensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.

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