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Two Different Engine Makes On The Same Aircraft?  
User currently offlineJAM747 From United States of America, joined Feb 2005, 550 posts, RR: 1
Posted (8 years 10 months 4 weeks 4 hours ago) and read 6754 times:

Can a jet aircraft have two different makes of engines on at the same time? For example can it have a RR on one side and have a GE on the other side?

[Edited 2005-09-28 18:59:24]

6 replies: All unread, jump to last
 
User currently offlineG4Doc2004 From United States of America, joined Feb 2004, 123 posts, RR: 0
Reply 1, posted (8 years 10 months 4 weeks 4 hours ago) and read 6738 times:

No, due to how the plane is certified, the TCDS or certification allows it to be airworthy ONLY if equipped with the engines specified on its certification data sheet, thereby ensuring the aircraft will perform according to the manufacturers specs.

Now, in theory, you could obtain an STC to do this, but I have a hard time believing the FAA or other agency would approve it.



"Failure to prepare is preparing to fail"--Benjamin Franklin
User currently offline777WT From United States of America, joined Jan 2005, 875 posts, RR: 1
Reply 2, posted (8 years 10 months 4 weeks 4 hours ago) and read 6735 times:

The 787 has engine interchangeablity plan in the design.

You could swap it between GE and RR if the buying airline only wants GE and the selling airline has the RR powered 787.

However they did bring up the possibily of running different brand engines, like GE on one side and RR on the other with just a software change.
This is that if you went somewhere remote and there's no GE avail there but happens to have RR avail, It can be put on and sent on it's way.


User currently offline2H4 From United States of America, joined Oct 2004, 8955 posts, RR: 60
Reply 3, posted (8 years 10 months 3 weeks 6 days 20 hours ago) and read 6673 times:
AIRLINERS.NET CREW
DATABASE EDITOR




Quoting JAM747 (Thread starter):
Can a jet aircraft have two different makes of engines on at the same time?





Sure.



Six Pratt & Whitney R-4360-53 radial piston engines, and four General Electric J47-19 turbojets:









http://www.military.cz/usa/air/post_war/b36/b36infl.jpg

http://prototypes.free.fr/xf90/images/b36(ficon)_05.jpg




View Large View Medium
Click here for bigger photo!

Photo © David Swain
View Large View Medium
Click here for bigger photo!

Photo © Ted Quackenbush







2H4





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User currently offlinePilotpip From United States of America, joined Sep 2003, 3150 posts, RR: 11
Reply 4, posted (8 years 10 months 3 weeks 6 days 19 hours ago) and read 6659 times:

If you were to do an engine swap, the powerplants aren't the only thing that would need to be changed. You'd also be changing items like the Fuel Control Unit, generators, and in some cases, cockpit guages. It's not very cost effective and means that two parts have to be stocked for one airplane, mechanics have to have two manuals for one aircraft, etc.


DMI
User currently offlineDarkBlue From United States of America, joined Sep 2003, 233 posts, RR: 10
Reply 5, posted (8 years 10 months 3 weeks 6 days 8 hours ago) and read 6605 times:

One of the biggest issues of mixing engines is engine control. RR requires the pilot to set power based on EPR. GE uses fan speed. Certainly a flight computer could be designed to manage the 2 types of control systems at the same time, but this is no minor issue.

Yes, the 787 will have interchangeable engines, but I'm not aware of any plan to allow a mixed configuration.


User currently offline2H4 From United States of America, joined Oct 2004, 8955 posts, RR: 60
Reply 6, posted (8 years 10 months 3 weeks 6 days ago) and read 6547 times:
AIRLINERS.NET CREW
DATABASE EDITOR




...Almost forgot about the Ryan FR-1 Fireball:


1 x Wright R-1820-72W Cyclone radial piston engine, 1,425 hp

1 x General Electric J31 turbojet, 1,600 lbs thrust






http://ails.arc.nasa.gov/Images/Aeronautics/jpegs/A-7223_a.jpeg





http://www.studenten.net/customasp/axl/image/foto/9-1-2004-14-5-ryan_fr1_14_drawing_a_crowd.jpg




2H4





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