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Marcus
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Plane With 5th Engine At PHX

Tue Feb 13, 2007 4:55 am

Hello, this past week I was at PHX and saw when landing a 4 engined plane next to the Honeywell building, since we went by pretty fast I could not say if this was a DC-8 or a B707 series aircraft.

What caught my eye was that it had what it looked to be 5th engine mounted on the fuselage, on the left hand side of the plane just behind the front door and at about window level, navigation lights were on and it took off while I was at the terminal waiting for my connecting flight.

Does anyone know if this is actually and engine? or some sort of testing equipment?
Kids!....we are going to the happiest place on earth...TIJUANA! signed: Krusty the Clown
 
WestWing
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 5:09 am


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Photo © Matt Willmott-Sharp



This one?
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Marcus
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 5:15 am

Yup......that's the one.
Kids!....we are going to the happiest place on earth...TIJUANA! signed: Krusty the Clown
 
spacecadet
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 6:35 am

Man, I wouldn't want to be seated in row 2 of that plane...
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litz
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 6:37 am

As the photo caption notes ...

It's a B720, and is indeed used for engine testing (the engine does not run for takeoff/landings, presumably) for small engines.

- litz
 
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treebeard787
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 9:51 am

It's a B720 owned by Honeywell, They use it to test small jet engines.
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DesertFlyer
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 9:54 am

This plane is down at IWA pretty often doing test out on 30R/12L. She sure is loud and smokey! I love the 720.
 
seabiscuit
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 3:35 pm

When did you see the Honeywell A/C? I thought the HON A/C was sent to Marana according to picture caption on this link: https://www.airliners.net/open.file/1151243/L/
Seabiscuit
 
lemonkitty
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 4:12 pm

Nope..The aircraft at Pinal Air Park is a 757, not the 720, which is still at PHX...

LK
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andessmf
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 4:17 pm

Quoting WestWing (Reply 1):
This one?

Hey! That's the 'weird' airplane someone saw before some chemtrails appeared! Not a joke, did see this 'report' with my own eyes. I was ROTFL because I have a book from years ago explaining what this airplane does.
 
BigJimFX
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 7:59 pm

Quoting AndesSMF (Reply 9):
Hey! That's the 'weird' airplane someone saw before some chemtrails appeared! Not a joke, did see this 'report' with my own eyes. I was ROTFL because I have a book from years ago explaining what this airplane does.

Any chance I could get the title of that book? I was wondering how a single engine could effect the flight of an aircraft needing four to fly....

I'm not being sarcastic I am genuinely curious. I don't know how these things work.  blush 
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Burkhard
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 8:17 pm

It doesn't effect significantly. But they can test it in air at full air speed - and maintain a stable platform even if it runs crazy, so they really can experiment at limits. This I asssume is the second step after testing at ground - before the engine is supposed to care for itself.
 
jcded
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 8:25 pm


View Large View Medium
Click here for bigger photo!

Photo © Alex G.-Denicourt - Contrails Aviation Photography


This one is based out of St. Hubert Airport in QC Canada, they test prop engines in the nose (swap) as well as engines as seen on the pic. There are rumors they want to replace it with a 757 as the 707 is getting old structurally.
You breathe to do good and have fun.
 
AirframeAS
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RE: Plane With 5th Engine At PHX

Tue Feb 13, 2007 11:43 pm

Quoting DesertFlyer (Reply 6):
This plane is down at IWA pretty often doing test out on 30R/12L.

I've seen that here at IWA once. But not lately... We do get alot of the 707 military tankers doing runs here too.
A Safe Flight Begins With Quality Maintenance On The Ground.
 
cdekoe
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RE: Plane With 5th Engine At PHX

Wed Feb 14, 2007 12:56 am

This site has some info on current propulsion engine programs at Honeywell:

http://www.honeywell.com/sites/aero/Propulsion_Engines.htm

The engine on the modified 707 is most likely a HTF7000 or, as rumoured, a higher thrust derivative to enter the 10,000 lbs class.
We can't solve problems by using the same kind of thinking we used when we created them.
 
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DesertFlyer
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RE: Plane With 5th Engine At PHX

Wed Feb 14, 2007 2:04 am

Quoting AirframeAS (Reply 13):
I've seen that here at IWA once. But not lately

It was here at IWA just last Thursday. It would land to a full stop, taxi back and takeoff. Someone I know down at the airport said it was there Wednesday too, which makes sense since I saw it takeoff from PHX that day.

[Edited 2007-02-13 18:05:10]
 
Dougloid
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RE: Plane With 5th Engine At PHX

Wed Feb 14, 2007 2:15 am

Back in the day when I was working for Garrett they still had the test bed aircraft for the TPE331, which was a B25 with a turboprop in the nose....
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