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HAWK21M
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PDUs On Main Deck - Freighters

Sun Jan 13, 2008 10:03 am

What type Aircraft have PDUs [Power driven units] to move cargo containers/Pallets on the Freighters main deck.
I've worked on B737 & B757 freighter both which use Manual Manpower to move the Loads to & From the Main Deck.

How is it on the MD11s,B747s & A300s

The Bulk Cargo compartment has the "Magic Carpet"

regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
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IFixPlanes
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RE: PDUs On Main Deck - Freighters

Sun Jan 13, 2008 10:07 am

You promised to fix the question mark button after 31.12.2007.  boxedin 
never tell an engineer he is wrong ;-)
 
avioniker
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RE: PDUs On Main Deck - Freighters

Sun Jan 13, 2008 4:12 pm

Hi Mel
The 747F, BCF, CF, and GATXF are the only ones I've worked with full length floors.
The magic carpet is a retrofit made by a couple of companies, the biggest being a Swedish/Danish company.
There are also a few PDU equipped Main Cargo Door area floor kits that you can install quite easily over the seat rails. They allow the cargo to be more easily moved into and out of the aircraft and spun once it's in the door or going out. I've had DC-10's, MD-11's and 747's with these.
 Smile
One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
 
doug_or
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RE: PDUs On Main Deck - Freighters

Sun Jan 13, 2008 4:19 pm

IIRC UPS A300s and (MD-11s?) were loaded manually. The 300 was difficult because the cargo floor sloped down towards the nose. The only powered ones I saw out there were the 747s, and I was not trained to operate the system.
When in doubt, one B pump off
 
MD11Engineer
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RE: PDUs On Main Deck - Freighters

Sun Jan 13, 2008 8:24 pm

For the MD-11, PDU's are an option. LH Cargo uses them, but e.g. UPS relies on system "Armstrong" to move the pallets. The 747 classic PDU's were a pain in the neck, always broken, so we had to explain to the loaders that we would just put them on the deferred items list, because we needed the short ground time to fix other, more important, problems (though the loaders didn't see that e.g. a flight control problem was more important than fixing the loading system for ramper's convinience  Wink ).

Jan
Je Suis Charlie et je suis Ahmet aussi
 
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HAWK21M
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RE: PDUs On Main Deck - Freighters

Mon Jan 14, 2008 6:53 am



Quoting IFixPlanes (Reply 1):
You promised to fix the question mark button after 31.12.2007.

Old habits die hard,Got to get used to it.  wink 

Quoting Avioniker (Reply 2):
the biggest being a Swedish/Danish company.

any name?

Quoting MD11Engineer (Reply 4):
The 747 classic PDU's were a pain in the neck, always broken

What would the added weight be like? approx.

regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
fr8mech
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RE: PDUs On Main Deck - Freighters

Mon Jan 14, 2008 12:57 pm



Quoting HAWK21M (Reply 5):
What would the added weight be like? approx.

Purely from experience, I don't have the weights in front of me, but I would say the Smart Wheels (8 installed) come in at about 50lbs and the Dumb Wheels (a whole lot installed) at around 25lbs.

Now before you ask, a Dumb Wheel works only on one axis, fore/aft. The Smart Wheels, installed in the side door positions and the 2 positions forward (total 4) of the door, will drive fore/aft, laterally, at 45 deg or they'll just drop out of the way as required for a particular load. Great system when it works. Lots of micro switches that go bad due to the area they're in.
When seconds count...the police are minutes away.
 
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HAWK21M
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RE: PDUs On Main Deck - Freighters

Tue Jan 15, 2008 7:02 am



Quoting Fr8mech (Reply 6):
but I would say the Smart Wheels (8 installed) come in at about 50lbs and the Dumb Wheels (a whole lot installed) at around 25lbs.

I'm sure there would be lifting Actuators for these PDUs,to cater to u/s.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
fr8mech
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RE: PDUs On Main Deck - Freighters

Tue Jan 15, 2008 1:56 pm



Quoting HAWK21M (Reply 7):
I'm sure there would be lifting Actuators for these PDUs,to cater to u/s.

No, there are not. You lug them up the stairs and then lug them down the stairs. Unless, of course, there is a loader on the aircraft with an operator. Then the job is just a bit easier. You still hump them in and out of the hole.
When seconds count...the police are minutes away.
 
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HAWK21M
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RE: PDUs On Main Deck - Freighters

Tue Jan 15, 2008 3:23 pm

So how is the Power driving done?.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
fr8mech
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RE: PDUs On Main Deck - Freighters

Wed Jan 16, 2008 1:41 pm



Quoting HAWK21M (Reply 9):
So how is the Power driving done?.

What do you mean? The wheels in the floor convey the containers/pallets throughout the aircraft. The main control is just inside the door (aft) with local controls at various station throughout the main deck. The locals control the individual wheels they are responsible for.
When seconds count...the police are minutes away.
 
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HAWK21M
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RE: PDUs On Main Deck - Freighters

Wed Jan 16, 2008 5:02 pm



Quoting Fr8mech (Reply 10):
What do you mean? The wheels in the floor convey the containers/pallets throughout the aircraft. The main control is just inside the door (aft) with local controls at various station throughout the main deck. The locals control the individual wheels they are responsible for.

There seems to be some confusion.
Lets rephrase....Are these PDUs Hydraulically driven or these rollers.
regds
MEL
I may not win often, but I damn well never lose!!! ;)

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