Tag Archives: engineering

Mechanical Porn

29 Jun

 

I feel like I’m back in my Mechanisms of Machinery class in college. LOVE it!

“The film presents a deceptively “open” series of images of gears and pistons that transfer movement from vertical to rotary directions. Musical in its repetitive visual form, it now seems akin to Charles Sheeler’s paintings and photographs of railroad locomotive gears and wheels, a tribute to the machine age.” 

— Robert A. Haller

 

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20 Engineering Terms

16 Jan

 

Things you’re likely to hear in an engineering department:

 

1. A NUMBER OF DIFFERENT APPROACHES ARE BEING TRIED – We are still pissing in the wind.

2. EXTENSIVE REPORT IS BEING PREPARED ON A FRESH APPROACH TO THE PROBLEM – We just hired three kids fresh out of college.

3. CLOSE PROJECT COORDINATION – We know who to blame.

4. MAJOR TECHNOLOGICAL BREAKTHROUGH – It works so-so, but looks very hi-tech.

5. CUSTOMER SATISFACTION IS DELIVERED ASSURED – We are so far behind schedule the customer is happy to get it delivered.

6. PRELIMINARY OPERATIONAL TESTS WERE INCONCLUSIVE – The damn thing blew up when we threw the switch.

7. TEST RESULTS WERE EXTREMELY GRATIFYING – We are so surprised that the stupid thing actually works.

8. THE ENTIRE CONCEPT WILL HAVE TO BE ABANDONED – The only person who understands that the thing doesn’t work.

9. IT IS IN PROCESS – It is so wrapped up in red tape that the situation is about hopeless.

10. WE WILL LOOK INTO IT – Forget it! We have enough problems for now.

11. PLEASE NOTE AND INITIAL – Let’s spread the responsibility for the screw up.

12. GIVE US THE BENEFIT OF YOUR THINKING – We’ll listen to what you have to say as long as it doesn’t interfere with what we’ve already done or are planning to do.

13. GIVE US YOUR INTERPRETATION – I can’t wait to hear this bullshit!

14. SEE ME or LET’S DISCUSS – Come into my office, I’m lonely.

15. ALL NEW – Parts not interchangeable with the previous design.

16. RUGGED – Too damn heavy to lift!

17. LIGHTWEIGHT – Lighter than RUGGED.

18. YEARS OF DEVELOPMENT – One finally worked.

19. ENERGY SAVING – Achieved when the power switch is off.

20. LOW MAINTENANCE – Impossible to fix if broken.

Oooooh, she’s bendy!

8 Oct

Boeing 787 during a stress test. There’s ~25 ft of deflection at the wingtips.

That’s some seriously badass engineering.

Larger version here:

http://i95.photobucket.com/albums/l128/stroked71/787_25fttipdeflection.jpg

Wing ultimate load test complete on 787
Posted by Guy Norris at 3/29/2010 2:27 AM CDT

Boeing completed the ultimate limit-load test on the static test 787 airframe, ZY997, at Everett on March 28. The test – officially dubbed Condition 18b – evaluates the ability of the wing-body structure to sustain loads equal to 150% design limit load – or the most extreme forces ever expected to be seen in service, and its clearance marks the passing of a significant hurdle on the way to FAA certification.

During the test, which occurred with 14.9 psi fuselage pressure, the wingtips deflected upwards by approximately 25 ft. The test, which did not continue until the wings failed, was also a key evaluation of the strengthened side-of-body modification which in June last year caused a six-month delay to the start of 787 flight tests. The deflection of the higher-aspect ratio composite wing was greater than that of the metallic 777 wing, the last major primary structure to undergo “wing ultimate up-bending” tests in Boeing’s sprawling Everett site more than 15 years ago. The 777 wing failed at 154%, having deflected 24 ft.

Internally Boeing is hailing the test as a major success, though externally the company is sounding a note of caution. “The initial results of the ultimate-load test are positive. More extensive analysis and review are required before the test can be deemed a success,” says Boeing.

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