Info on Boeing's wingsweep angle

[Hachiouji-shi]

Where can I find info regarding all of Boeing's wingsweep angle? I have tried their website but there isn't any info unlike Airbus'.

http://www.boeing.com/commercial/777...00product.html

http://www.airbus.com/en/aircraftfam...fications.html

are examples

[SMOC]

Boeing 707 - 35 degrees

Boeing 727 - ?

Boeing 737 - 25 degrees

Boeing 757 - 25 degrees

Boeing 747 - 37.5 degrees because it's halfway between 35 degrees of the 707 and 40 degrees that the performance guys wanted but engineers didn't.

Boeing 767 - 31.5 degrees

Boeing 777 - ?

[rhovsquared]

For the other two unlisted aircraft a small cheap scale model or an aerial photograph of the planes along with na protractor should provide the answers. I wonder if the 747 series is the most swept of all the airliners flying?

[Hachiouji-shi]

so any body got the figure for the 777's sweep angle?

[Old Aero Guy]

so any body got the figure for the 777's sweep angle?

The same as the 767.

[18-Wheeler]

Originally Posted by SMOC

Boeing 747 - 37.5 degrees because it's halfway between 35 degrees of the 707 and 40 degrees that the performance guys wanted but engineers didn't.

Close - it's 45° from the wing root to the outboard engines, then it's 37.5°.

[bigbeerbelly]

777-200 = 37.5
777-300 = 31.6

[212man]

I thought the 707 was so named because of the 45 degrees of sweep: Tan 45 being 0.707? Maybe a myth?

[Old Aero Guy]

Originally Posted by bigbeerbelly

777-200 = 37.5
777-300 = 31.6

No, both the 772 and 773 have the same quarter chord sweep of 31.6 deg.

[Hachiouji-shi]

what about the MD11 ?

[18-Wheeler]

Originally Posted by 212man

I thought the 707 was so named because of the 45 degrees of sweep: Tan 45 being 0.707? Maybe a myth?

Pure myth - Albeit a clever one.

[bigbeerbelly]

MD11 = 35 degrees

[stilton]

727 is 35 Degrees.

[SMOC]

Originally Posted by 18-Wheeler

Close - it's 45° from the wing root to the outboard engines, then it's 37.5°.

Except wing sweep isn't measured from the wing root it's measured from a quarter chord (C/4) which is 37.5°.