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Pratt & Whitney Canada 5-engined Boeing 747SP spotted on Apron @ YMX

Video shot by showing a glimpse of the P&W Canada 5 engined 747SP testbed. Also a favorite, taxing Nolinor B737-200 gravel runner ( More...

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SmokedChops 10
That is how they test the smaller fans. I believe GE has done one as well, an old B742 if I recall. Add one small nacelle, and all of the appropriate instrumentation, and hey-presto, an instant moving test stand.
That looks so odd...
K Mac 5
We did things similar when I worked at Cessna in the experimental flight dept. During Citation Mustang testing, we had the little PW615 engines on the RH pylon of our CJ2. Looked funny, but worked for testing. PW on one side, Williams on the other.
Reuben Smith 3
Got any cool pictures from your work there?
Chris Muncy 4
That 74 should see a doc about that abnormal growth :p. But seriously, it is an interesting way to test engines.
Ric Wernicke 4
I bet it makes snappy left turns.
I cannot remember the last time I saw an SP
Toby Sharp 1
Honeywell has a 757 they use for engine testing, they attach engines in the same manner. Sometimes even turbo props! talk about strange looking.
william baker 1
Has anyone else seen that most engine test beds are made out of the Boeing 747 including the A380 engine if im not mistaken.
djames225 1
Both GE and Rolls-Royce use the B747..RR just acquired a second unit at the end of 2019, a B744 ex Quantas unit. It should be testbed ready end of 2021. I believe it is because the way the wing on the port side is configured structurally.
The oddest testbed I have seen thou, was P&W Canada's B720 "Red" The nose was elongated, Pitot tubes repositioned then a PW150 turboprop mounted on the nose to test
william baker 1
For a second there i thought you were rapidwolve you both have the same wolf pic lol. The left wing on the 747 has the capablilites to haul a 5th spare engine. I believe its beefed up to handle that weight of another engine and thats why they use the 747 because I dont think I have seen any test engines outside of the number 2 spot.
djames225 1
I am..changed my name due to flack..yes..structural supports allow for a 5th pylon OR larger engine in place of #2.
Take a look at the article here..P&W Canada are not using #2 spot, and if you get a chance, check out P&W Canada's, now retired, B720
william baker 1
They are using the area right around the right hand upper deck exit door if im not mistaken. I will look up the B720 for sure.
There is no "u" in Qantas!
Reini Grauer 1
Does anyone know what the device is behind the nose wheels on the 737-200?
John Boudreau 3
gravel defector
Don Whyte 2
David Ingram 1
Unique option that works and is no longer available. They will likely keep them flying forever.
djames225 1
Got another unit in 2018 that was converted in Mirabel.
Bob Myers 1
I have to assume that P&W did their homework on this, but can someone explain to me how this is the optimum location for the "5th engine"? I understand that this is an engine test bed, but that location seems unnecessarily inaccessible.
Rolls Royce has a 747 that is just like this, though the 5th engine is on the other side. GE puts a third engine under the wing on their 747. Like Scott said this puts the engine in clean air, shows the performance on a wing with only one engine, and can be structurally secured in the cabin.
ReverendLee 1
My guess would be that it's the best place to put it because it is out of the way of any disturbances. Forward and high enough that it's riding in clean air.
Tink Tank 1
That 747 needs an appointment with Dr. Pimple Popper!
chugheset 0
Actually that extra engine is what they use when the upper deck separates from the balance of the aircraft like on Star Trek. Of course its only used in emergencies like a Romulan attack.
a1brainiac 0
Weirdest configuration ever
One would think that the aircraft would need a portside counterweight to balance the extra starboard weight.


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