dodger42 Posted October 10, 2007 Share Posted October 10, 2007 My folks just took a trip from Sydney to Singapore on Qantas. They were delayed 4 hours at the airport. I thought my old man was joking when he told me they strapped on an extra turbine for a total of 5. I couldn't see that really working from a weight/balance/drag scenario. But sure enough I found this: Some people musta been confused when they saw this thing taxiing about. . . . Lockon Advanced Realism with Touch-Buddy Link to comment Share on other sites More sharing options...
VMFA117_Poko Posted October 10, 2007 Share Posted October 10, 2007 Hmm... Interesting. What's it for? Reading just title of this thread I imagine additional engine in the back on tail. This isn't simetrical! Very interesting. And it's in use by Quantas Airlines??? Link to comment Share on other sites More sharing options...
X-man Posted October 10, 2007 Share Posted October 10, 2007 This is usually done to transport enginges around. Insted of packing it into a Cargo plane, you just strap it on to a 747 thats going to the destination anyway. It's not that big of deal for a 747 in terms of unbalance/drag etc etc :) http://www.airliners.net/open.file/0289429/L/ [url=http://www.airliners.net/open.file/0289429/L/][/url] http://www.airliners.net/open.file/136724/L/ http://www.airliners.net/open.file/392874/L/ http://www.airliners.net/open.file/255145/L/ http://www.airliners.net/open.file/783444/L/ Cheers 1 64th Aggressor Squadron Discord: 64th Aggressor Squadron TS: 135.181.115.54 Link to comment Share on other sites More sharing options...
dodger42 Posted October 10, 2007 Author Share Posted October 10, 2007 And another pic :) . . . Lockon Advanced Realism with Touch-Buddy Link to comment Share on other sites More sharing options...
dodger42 Posted October 10, 2007 Author Share Posted October 10, 2007 That too would give the same unbalance but as said, its not that big of a deal for 747s :) Not really. In the case of engine failure, both wings still weigh the same. In this case you have an extra few tons on one side. I guess more importantly... when is ED going to model this? :/ . . . Lockon Advanced Realism with Touch-Buddy Link to comment Share on other sites More sharing options...
X-man Posted October 10, 2007 Share Posted October 10, 2007 Not really. In the case of engine failure, both wings still weigh the same. In this case you have an extra few tons on one side. I guess more importantly... when is ED going to model this? :/ True :doh: But the engine is so close to the fuselage that the unbalance should be minimum. For a 350 ton plane, a 5 ton enginge should be able to be trimed out. Its like our ordinance on Military planes..... 64th Aggressor Squadron Discord: 64th Aggressor Squadron TS: 135.181.115.54 Link to comment Share on other sites More sharing options...
TorwaK Posted October 10, 2007 Share Posted October 10, 2007 Hmmm... if you ask me it's about balance the plane against fat people. I think crew are force them to sit at left side. :P 1 [sIGPIC][/sIGPIC] Intel Core i7-6700K, @5GHz | Asus Maximus Hero VIII | 2 x eVGA GTX 970 SLI | Kingston Predator 16GB DDR4-3000Mhz | 2 x Samsung 850 PRO 240GB RAID-0 | AOC G2460PG G-SYNC LCD | OCULUS RIFT CV1 VR | THRUSTMASTER HOTAS WARTHOG | CH PRO PEDALS Link to comment Share on other sites More sharing options...
VMFA117_Poko Posted October 10, 2007 Share Posted October 10, 2007 But its still near to the middle... Link to comment Share on other sites More sharing options...
britgliderpilot Posted October 10, 2007 Share Posted October 10, 2007 That's interesting. I've seen it done before, but the previous images I've found have had an aerodynamic fairing over the intake. I can't believe they're actually running the engine . . . . I'd like to know more about that. Does the 747 have a fifth hardpoint down there? http://img.photobucket.com/albums/v121/britgliderpilot/BS2Britgliderpilot-1.jpg Link to comment Share on other sites More sharing options...
Nordic Posted October 10, 2007 Share Posted October 10, 2007 engine test under real conditions. i have seen a 747 with an airbus 380 engine on a pic... Link to comment Share on other sites More sharing options...
X-man Posted October 10, 2007 Share Posted October 10, 2007 I can't believe they're actually running the engine . . . . Im pretty sure the enginge is not running. They would u fit an extra throttlehandle, an extra start switch, an extra fire distinguisher etc, to the cockpit :) I'd like to know more about that. Does the 747 have a fifth hardpoint down there? Yes it does! At the time the 747 was introduced, the engines were more unreliable, so there was a bigger chance of engine failure and that you would get 'stranded' at some airport. Also there were less dedicated Cargo transports who would be able to ferry the engines to the stranded planes. Boeing, and other manufacturers too, therefor offerd this (cheap, simple and fast) method of transporting engines around. Today, however, engines are more reliable, there are more dedicated cargo planes who transport the engines around, there are engine shops at more airports etc etc 64th Aggressor Squadron Discord: 64th Aggressor Squadron TS: 135.181.115.54 Link to comment Share on other sites More sharing options...
Nordic Posted October 10, 2007 Share Posted October 10, 2007 Im pretty sure the enginge is not running. They would u fit an extra throttlehandle, an extra start switch, an extra fire distinguisher etc, to the cockpit :) believe me or not... they are actually testing engines this way. it shouldn't be a problem to add some controls to the cockpit, when they can fit an addiotional engine under the wing. okay it was not a 747, but an airbus 340. http://www.fly-net.org/aeromedia/a380eng.html Link to comment Share on other sites More sharing options...
X-man Posted October 10, 2007 Share Posted October 10, 2007 believe me or not... they are actually testing engines this way. it shouldn't be a problem to add some controls to the cockpit, when they can fit an addiotional engine under the wing. okay it was not a 747, but an airbus 340. You're right about testing engines this way. BUT they dont test engines on commercial flights. Like the picture dodger showed, why would QANTAS test RR engins on a regular flight?? The pictures we've seen so far is where the engines are beeing ferried... Here's some pics of the test a/c. Same showed in your links! http://www.airliners.net/open.file/1242177/L/ http://www.airliners.net/open.file/0794871/L/ 64th Aggressor Squadron Discord: 64th Aggressor Squadron TS: 135.181.115.54 Link to comment Share on other sites More sharing options...
dodger42 Posted October 10, 2007 Author Share Posted October 10, 2007 Damn those are sweat pics. The A380 engines are huge compared to the 74s. . . . Lockon Advanced Realism with Touch-Buddy Link to comment Share on other sites More sharing options...
Mugatu Posted October 10, 2007 Share Posted October 10, 2007 It's just a spare. Not connected to the flight controls or fuel system in any way. The other pics are test beds for engine qualification, not what Qantas does. You're right about testing engines this way. BUT they dont test engines on commercial flights. Like the picture dodger showed, why would QANTAS test RR engins on a regular flight?? The pictures we've seen so far is where the engines are beeing ferried... Here's some pics of the test a/c. Same showed in your links! http://www.airliners.net/open.file/1242177/L/ http://www.airliners.net/open.file/0794871/L/ Link to comment Share on other sites More sharing options...
X-man Posted October 10, 2007 Share Posted October 10, 2007 It's just a spare. Not connected to the flight controls or fuel system in any way. The other pics are test beds for engine qualification, not what Qantas does. Exactly! :) 64th Aggressor Squadron Discord: 64th Aggressor Squadron TS: 135.181.115.54 Link to comment Share on other sites More sharing options...
RvETito Posted October 10, 2007 Share Posted October 10, 2007 Heh, all engine manufacturers use flying test beds for their engines but I had no idea that engines are transported as bombs just like that :D So the question is- how many engines the 747 can carry under it's wings? :D 1 "See, to me that's a stupid instrument. It tells what your angle of attack is. If you don't know you shouldn't be flying." - Chuck Yeager, from the back seat of F-15D at age 89. =RvE= Link to comment Share on other sites More sharing options...
VMFA117_Poko Posted October 10, 2007 Share Posted October 10, 2007 When all engines will work - so many as can be placed on it :lol: Link to comment Share on other sites More sharing options...
tflash Posted October 10, 2007 Share Posted October 10, 2007 The 747 is some hell of a plane! Wow! [sIGPIC][/sIGPIC] Link to comment Share on other sites More sharing options...
ALDEGA Posted October 10, 2007 Share Posted October 10, 2007 I guess more importantly... when is ED going to model this? :/You have no proof this is real!!! ED need documentation and real pictures... ;) Link to comment Share on other sites More sharing options...
33 309th_Hedgehog Posted October 12, 2007 Share Posted October 12, 2007 It's just a spare. Maybe. Normally airlines use it to carry a broken engine to the next airport where it will get into the repair process. All airlines have contracts with MROs (Maintenance, Repair and Overhaul companies). And this is an easy way to carry the engine to their next MRO facility. And yes, the engine is spinning - rotating in the wind. Can you believe how much your drag will increase if you would fix the blades against rotating? [sIGPIC][/sIGPIC] Thrustmaster HOTAS Warthog :: Saitek Rudder :: Track IR5 :: EVGA 3 GB GTX580 :: AMD FX-8120 :: SSD 240 GB :: Win7 Ultimate 64 Link to comment Share on other sites More sharing options...
britgliderpilot Posted October 12, 2007 Share Posted October 12, 2007 Maybe. Normally airlines use it to carry a broken engine to the next airport where it will get into the repair process. All airlines have contracts with MROs (Maintenance, Repair and Overhaul companies). And this is an easy way to carry the engine to their next MRO facility. And yes, the engine is spinning - rotating in the wind. Can you believe how much your drag will increase if you would fix the blades against rotating? Yep - but I'd have thought it would be less draggy to fit a fairing over the intake. Cheers for the info on the 5th hardpoint X-Man :) http://img.photobucket.com/albums/v121/britgliderpilot/BS2Britgliderpilot-1.jpg Link to comment Share on other sites More sharing options...
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