The Boeing 367-80 (Dash 80) with a 5th engine. It was the Boeing 707 prototype and used to test the engine of the upcoming Boeing 727
Posted by Met76@reddit | WeirdWings | View on Reddit | 15 comments
Posted by Met76@reddit | WeirdWings | View on Reddit | 15 comments
DJKaotica@reddit
As someone who lives in WA now, that third photo is awesome.
Puget Sound in the foreground.
Lake in the "middle" is Lake Union.
In the background you can see Lake Washington and make out where Juanita is and downtown Kirkland.
Hattix@reddit
That S-duct flame tube gets me every time on this thing.
xerberos@reddit
Makes you wonder if they attached the mount points, then added the engine, and only then realized that it was the wrong place.
Hattix@reddit
Almost certainly not. The forces involved with engines are very high, you can't just ram some rivets through the skin in a random location.
It'd be more likely that the highest structural member they could secure it to was there. Under their skin, airliners are semicircles of structure, the upper fuselage is really lightly built.
Scrappy_The_Crow@reddit
More importantly, it puts the intake above and behind the inboard section of the wing, in close proximity to the fuselage. There are boundary layer and "blanking" effects that have to be evaluated.
Raguleader@reddit
The fact that, were it not for the S-duct, they've got the engine aligned with the horizontal stabilizer amuses me.
Publix-sub@reddit
Bypass? Never heard of her.
rodface@reddit
Does anyone know of a good graphic comparing the outer mold lines of the 367-80, 707, 720, and KC-135?
orboboi@reddit
The fucken leading edge on that one wing though
Coreysurfer@reddit
Such cool stuff in aviation if you can just find it all..its fun
Raguleader@reddit
*obligatory trivia about the Dash-80 being more closely related to the KC-135 than the 707, with the 707 having a larger fuselage*
Met76@reddit (OP)
Details like that is why I like this subreddit.
Another one for ya, the Dash 80 did not have turbo compressors in the pylon engine mounts. When the 707 was introduced with the JT3D engine, they added the turbo compressor to 3 of the 4 engines. Thus, the pylon of the 3 of 4 engines became thicker with the little intake hole on the front.
MiguelMenendez@reddit
Do a barrel roll!
Met76@reddit (OP)
Just selling planes sir!
Met76@reddit (OP)
Excellent article on the project
I remember seeing it at the Steven F. Udvar-Hazy museum many times as a kid. Had no idea how much of a pioneer to modern aviation it was.