lmml 14/32
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DC8 Cockpit Question

Mon Jan 18, 2010 10:05 am

I was searching some pictures of DC8 cockpits and I was amased how much this has evolved over the years.

I came across this picture and have a couple of questions: What is the large lever with the yellow knob on the FO's side, and where are the radio controls located?


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Photo © John Padgett

 
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longhauler
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RE: DC8 Cockpit Question

Mon Jan 18, 2010 3:46 pm

Wow that's a pretty advanced cockpit for a DC-8 ... dual FMSs!

The radio controls used to be where the FMSs are now. Likely, they are internal to the FMS. We have a few planes that do this ... radio page on the MCDU.

I checked my DC-8 manuals that include the DC-8-41, -43, -53, -54F, -61 and -63 and that yellow knob is not there. I am curious too.
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longhauler
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RE: DC8 Cockpit Question

Mon Jan 18, 2010 5:40 pm

On another note ...

One can tell that is an ex Air Canada DC-8.

The hydraulic pressure gauges on the lower part of the Captain's panel is the best indication. Trans-Canada Air Lines (pre-Air Canada) had originally intended the DC-8 to be a two man cockpit! I am not kidding!

A lot of the controls and indications on the Second Officer/Flight Engineer's panel ended up on forward panels in the anticipation of a two man cockpit. As history shows, this was never allowed. All DC-8s built for TCA/AC therefore had this unusual layout.

When it came time to sell the aircraft, it was a detriment as they were unlike any other DC-8's on the earth. Shoot, it even was a problem when AC tried to sell the DC-8 simulators!
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fr8mech
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RE: DC8 Cockpit Question

Mon Jan 18, 2010 6:52 pm

The yellow knob is the gust lock. When the knob (and the attached handle) are rotated aft, the elevator fairs and is locked in place. Something happens at the rudder also, but I can't recall.

The radio caontrols are on the overhead.
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JETPILOT
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RE: DC8 Cockpit Question

Mon Jan 18, 2010 10:18 pm

The gust lock handle also mechanically locks the thrust levers in place.

I thought he was asking about the rain removal lever but then I realized that it's not yellow.
 
Lemmy
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RE: DC8 Cockpit Question

Mon Jan 18, 2010 11:18 pm

That landing gear lever has to be a foot long! Do you really need that much leverage to raise and lower the gear?
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fr8mech
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RE: DC8 Cockpit Question

Tue Jan 19, 2010 12:54 am



Quoting JETPILOT (Reply 4):
The gust lock handle also mechanically locks the thrust levers in place.

Just 2 and 3.

Quoting Lemmy (Reply 5):
That landing gear lever has to be a foot long! Do you really need that much leverage to raise and lower the gear?

You're taking me back a few years, but the handle also acts as the emergency release for the doors, if I recall correctly.
When seconds count...the police are minutes away.
 
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longhauler
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RE: DC8 Cockpit Question

Tue Jan 19, 2010 1:09 am



Quoting Fr8Mech (Reply 3):
The radio caontrols are on the overhead.

'

The overhead housed the HFs, Selcal, Transponder, ADFs, Radar and CVR.

The VHF and ILS controls were immediately aft of the autopilot controls on the control (lower) pedestal. Aft of them were the audio panels. I see in the pic that the autopilot controls remain, but the VHF/ILS and audio panels are replaced by the MCDUs.

Are you saying that in this conversion, the VHF/ILS and audio panels were moved to the upper panel? I dont doubt you, just curious, as it would be cumbersome.
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fr8mech
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RE: DC8 Cockpit Question

Tue Jan 19, 2010 5:48 am



Quoting LongHauler (Reply 7):
Are you saying that in this conversion, the VHF/ILS and audio panels were moved to the upper panel? I dont doubt you, just curious, as it would be cumbersome.

I don't know about this particular mod, but on UPS aircraft, the #1 com head (frequency selector) was on the overhead, the #2 on the pedestal. The VOR/ILS frequency selectors were on the glareshield. Both audio select panels were on the pedestal.


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JETPILOT
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RE: DC8 Cockpit Question

Tue Jan 19, 2010 9:51 am

The landing gear lever is that long so enough leverage can be applied to the lever to shear a rivet allowing the gear door and gear uplocks to be mechanically released and allow the gear to freefall into place in case of hydrualic failure.
 
lmml 14/32
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RE: DC8 Cockpit Question

Tue Jan 19, 2010 11:05 am



Quoting Fr8Mech (Reply 3):
The radio caontrols are on the overhead

Highly unlikely. There is nothing that remotely resembles a VHF module in the overhead panel.

Quoting LongHauler (Reply 1):
The radio controls used to be where the FMSs are now. Likely, they are internal to the FMS. We have a few planes that do this ... radio page on the MCDU.

I'd am more inclined to beleive this.
 
Buzz
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RE: DC8 Cockpit Question

Wed Jan 20, 2010 1:48 am

Hi LMML 14/32, Buzz here. Big yellow knob? Of course somebody answered the question.
I like the movie "Airplane" where the Capt. operates the gear shift knob when it's time to push back (grin)
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Viscount724
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RE: DC8 Cockpit Question

Wed Jan 20, 2010 4:52 am



Quoting LongHauler (Reply 2):
One can tell that is an ex Air Canada DC-8.

That aircrft with original operator, as originally delivered as a passenger -63.


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Photo © Pierre Langlois



After conversion to -63F freighter.


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Photo © Michel Gilliand



After conversion to -73F with CFM56 engines.


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Photo © Bob Logan - PrestwickAviationPhotography

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