<<  <  Page 2/2
User Rank
Re: Why didn't engineers correctly predict shockwaves?
ervin0072002   4/27/2012 9:15:13 AM

Hey Ann,


The reason is our ability to predict turbulence. Some simulation software has gotten close. But to date we can only predict tested conditions. The facts behind turbulence are still largely guessed and even after a good bit of aviation history we are still working on the kinks. I have been to several meetings with mathematicians that are leaders in this field. It's difficult for them to predict with any great accuracy. Yes 10000% error is outrageous but it's possible in a field we are infants on.


Charles Murray
User Rank
Re: Why didn't engineers correctly predict shockwaves?
Charles Murray   4/26/2012 8:12:37 PM
That's a good question, Ann. The fact that it travelled successfully for three minutes might indicate that the shock wave was a sudden anomaly shortly before it failed (I can't imgine any design standing up to 100X loads for three minutes). Still, it's hard to imagine why no one foresaw a shockwave of this magnitude.

Ann R. Thryft
User Rank
Why didn't engineers correctly predict shockwaves?
Ann R. Thryft   4/26/2012 2:21:52 PM

I guess what's not clear to me is, why was the aircraft designed to withstand shockwaves 100 times LESS strong than it actually experienced? I'm especially surprised since this was apparently the second flight, not the first. Why didn't engineers do a better job of prediction?

TJ McDermott
User Rank
Re: 100x Performance Factor
TJ McDermott   4/26/2012 10:41:33 AM
One learns most from failures.

User Rank
100x Performance Factor
williamlweaver   4/26/2012 7:41:18 AM
I recall several publications and reporters reveling in the "failure" of the HTV-2 test back in August. But the ability to withstand forces 100x greater than design specifications and still manage to deploy a controlled abort should be a success in everybody's metrics. Controlled flight at Mach 20 for 3 minutes should have provided a wealth of telemetry. And these are the unclassified tests.... exciting.

<<  <  Page 2/2

Partner Zone
Latest Analysis
Using 3D-printing to integrate electronics is an enthralling idea, but there's a long road ahead to commercialization.
What should have been an easy microcontroller upgrade opens up a mysterious web of problems.
Prime Minister Narendra Modi is seeking help from Tesla Motors' Powerwall technology for solar-energy storage in India.
The September release spotlights Autodesk's long-term strategy for provisioning of its CAD, CAM, and CAE software and its commitment to cloud delivery.
The transformative nature of designing and making things was the overarching, common theme at separate conferences held in Boston by two giants in the PLM space: Autodesk, with its Accelerate 2015, and Siemens’s Industry Analyst Conference 2015.
Design News Webinar Series
10/1/2015 11:00 a.m. California / 2:00 p.m. New York
9/10/2015 11:00 a.m. California / 2:00 p.m. New York
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
6/25/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 5 - 9, Standards for the Internet of Things (IoT)
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7

Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service