Did anyone see that pic in Airliner World a little time ago showing a BA 747 in 1970 odd carrying a fifth engine? Question is how would the thing fly with that weight on one wing and surely it wouldnt be operational? would they give more power to the other side due to weight?
Stables.
By: KabirT - 4th June 2002 at 06:45
RE: 5 engines on BA 747
[updated:LAST EDITED ON 04-06-02 AT 06:55 AM (GMT)]also TWA had done this alot on there B747 on transatlantic routes.
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By: apatch - 4th June 2002 at 06:34
RE: 5 engines on BA 747
Dazza,
You are correct. That 747 carries a fifth engine for testing purposes. Boeing uses it to test engines for new airplanes. The extra engine strut is inboard of all the existing four engines. The plane is the original 747, alias “The City of Everett”. I work a couple of km’s from where the plane is based.
By: greekdude1 - 2nd June 2002 at 23:16
RE: 5 engines on BA 747
No SMF, it’s not a joke. See Dazza’s and Kabir’s posts.
GD1
By: Dazza - 2nd June 2002 at 22:59
RE: 5 engines on BA 747
If any jet ever carried a fifth engine it was more likely for testing a new engine, or ferrying a replacement engine to a maintenance facility overseas, the crew would simply trim the aircraft to counter any drag induced loss of stability in flight.
Regards, Dazza.
By: SMF_333 - 2nd June 2002 at 22:38
RE: 5 engines on BA 747
I hope y’all are joking about that 5th engine????
By: KabirT - 8th April 2002 at 16:28
RE: 5 engines on BA 747
hmm i think you are right…not sure though!
By: Bhoy - 8th April 2002 at 16:22
RE: 5 engines on BA 747
Wasn’t that the Boeing 720 testbed for the Avro RJX engines?
By: KabirT - 8th April 2002 at 16:06
RE: 5 engines on BA 747
In the early seventes this was done frequently on trans-atlantic/contemetal flights. It was kept as a precaution incase of engine failure. QANTAS used to do this on there 707 and early 747s too. Pan Am has done this before. A fifth engine on regular flights is mainly kept as a precautionary engine. Heres a pic of a Honeywell B707 with a fifth engine during tests.
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By: coanda - 8th April 2002 at 15:41
RE: 5 engines on BA 747
I suppose you wouldnt even need that, where is the engine placed guys? the further inboard you go the less of a turning moment the engine will produce……this would work for rudder and aileron control aswell. of course its advantageous to have the engine on the centreline of the aircraft.
By: EGNM - 8th April 2002 at 15:11
RE: 5 engines on BA 747
haven’t GE alos been doing that with the new Regional jet engines for trials on a 747 classic – all they’d need with an engine of that size would be to cut the throttle of on of the other 2 on that wing proportionally and add a bit off rudder to solve that!
By: LGKR - 8th April 2002 at 13:36
RE: 5 engines on BA 747
not sure about more power on the otherside, but they’ll probably give it alittle rudder. I dont think the weight of another engine would ground the 747 neway :p
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April 8, 2002 at 1:28 pm