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#1
10th September 2008, 01:00 PM
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Aircraft Engineering Question
Just a quick question,
A friend of mine today was talking about how aircraft engineers attach an extra engine to a planes wing to cart it to another location rather than putting it in cargo or on a cargo plane. For example with on a 747 they add a third engine on the wing as close as they can to the fuselage. He also said that they can do this while passengers are on board the flight, and that they can attach it to only 1 wing. So for example a 747 having in total 5 engines attached to it. Is he pulling my leg or is any of this true? Now he has provided evidence with a photo, but Photoshop does many lovely things these days. Thanks for the help. 
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#3
10th September 2008, 01:16 PM
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Here's some more evidence...
http://www.airliners.net/photo/Qanta...438/0289429/M/
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#4
10th September 2008, 02:54 PM
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There are quite a few pics on airliners.net, mainly of the QF 747's (Rolls Royce engines) operating the 5th pod. One of the moderators, Will Tidmarsh, has operated a couple of these 5th pod flights.
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#6
10th September 2008, 07:32 PM
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Supplementary question
What does the 5th pod weigh? Are the left and right fuel tank loads adjusted to compensate or is the turning moment neglible when it hugs the fuselage so closely?
__________________
Philip
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#7
11th September 2008, 01:44 PM
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There is a code entered into the computer which offsets the conditions. Will has actually posted a very informative post when he did the last v-pod operation. It also comes up on the pilots screen saying V-Pod or something along the lines of such. There is severe penalty restrictions imposed on the aircraft but its all approved. On the jumbo there are attach points for the V-Pod pylon to be bolted up. You can put any RR engine onto the pylon as the bolts all match up. The aircraft that can carry a spare engine are B747-100,-200,-300,-400, B707, L1011 and a Tristar I think. Engines for the jumbo are the P&W JT9 and RR all variants.
B744 carrying a B743 Engine http://www.jetphotos.net/viewphoto.php?id=329043 B743 http://www.jetphotos.net/viewphoto.php?id=311622 http://www.jetphotos.net/viewphoto.php?id=311625
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