Maya for 3D Printing - Rapid Prototyping
In this course we're going to look at something a little different, creating technically accurate 3D printed parts.
#
61
11-10-2011
, 10:44 PM
Lead Modeler - Framestore
Join Date: Feb 2003
Join Date: Feb 2003
Location: UK
Posts: 6,287
Jay
#
62
16-10-2011
, 02:25 AM
yes...you dont sound not non double negative
Join Date: Jun 2009
Join Date: Jun 2009
Location: Norfolk, VA
Posts: 91
that is a nice job Jay. i like how smooth the curves are... sounds so noobish of me to say hehe.
#
63
16-10-2011
, 06:08 AM
Moderator
Join Date: Jan 2004
Join Date: Jan 2004
Location: Michigan, USA
Posts: 2,998
I searched for 20 minutes and could not find the first hand account by Bob Hoover of the crash where he was testing either a F-86 or F-100 and there was a hydraulics problem on take off. I know he had a hydraulics problem in an F-100 on landing but the take-off failure story was amazing.
There is a short mention of it in the article below and it states it was in an F-86 but I am not sure that is correct because he broke his back on the landing and I believe the incident where he suffered a broken back was in an F-100.
https://www.airspacemag.com/history-o...-the-Best.html
======================long story but hopefully entertaining=======================
Anyway, the story goes like this as best that I can recall...
Shortly after takeoff and as soon as the gear were retracted the stick hydraulics failed and the stick slammed full back with enough force that it broke his thumb! The nose of course pitches violently upward. At full power the aircraft climbs at an ever increasing angle of attack as Bob urgently tries to force the stick forward to get the nose down to avoid the approaching stall. But as hard as he can push the stick refuses to budge! The aircraft inevitably stalls, and the nose pitches violently down while he is still very close to the ground.
Now with horizontal stabilizer stuck full up (pitch) and no aileron (roll) control and dangerously close to the ground most people would call it a day and bail out. But not a test pilot and certainly not Bob.
As soon as the nose pitched down he reduces the power and as the angle of attack decreases and the airspeed increased and the aircraft wings once again produce lift but before the plane levels and starts to climb up again he is just feet above the ground and some hanger building! He adds full power and once again the plane races upward but this time he gets a little higher before the plane once again reaches the critical angle of attack and stalls again, pitches down and eventually starts the process anew, each time pitching back up a little higher above the ground and stalling again at a little higher altitude.
The whole time Bob is trying to fly the plane with any of the controls he can still move - the rudder, the flaps, the air brakes, and primarily the throttle. He continues to wrestle the airplane like a rodeo bull rider in the sinusoidal flight path for 40 minutes! The whole time using the throttle to try and even out the wild pitching and the rudder to circle the dry lake bed. By now he has been advised to bail out by his ground controllers.
But at this point, Bob has the amplitude of the pitching almost nulled out and responds he is going to attempt a wheels up landing. He gets the plane settled into a nice long descending approach and all goes well until he got about a wing length from the ground and an aerodynamic affect known as ground affect kicked in and through off the delicate balance he had struggled to attain. The aircraft failed to flare and Bob thought "Oh my, this is gonna hurt", as the plane pancaked into the lake bed.
Even though it was a very hard impact and as a result Bob broke his back the plane was relatively undamaged.
Bob recovered from his back injury and went on to fly for many years. When asked why he did not bail out when he had the chance he responded the he felt he had a good chance to get the plane down in relatively good shape and if he bailed out the plane would have certainly been completely destroyed and then he or someone else would have to climb into another one and go through the whole process again! This way the engineers were able to discover a flaw in the landing gear system that caused the hydraulics for the stick to fail when the gear reached the full up position and fix it.
Ironically, if Bob had simply put the gear down he would have regained control of the stick. But he did not want to do that as it would have thrown the delicate balance he had attained out of whack had it not corrected the problem.
I wish I could find the official first hand account from Bob because it is much better then mine. I just cannot imagine how anyone can manage to walk with a pair of 15lb brass huevos!
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 16-10-2011 at 07:21 AM.
#
64
16-10-2011
, 10:23 AM
Lead Modeler - Framestore
Join Date: Feb 2003
Join Date: Feb 2003
Location: UK
Posts: 6,287
Been a while, thank you sir....you noob LOL.
Well to be honest, I still prefer organic modelling but having done a full year creating hardsurfaced spacecraft, space stations, shuttle craft, ground traffic and more, I have taste for it at the moment, and after my Audrey Hepburn image this was the intended model...I have plans for a pilot too for this so back in the comfort zone after the Plane is finished LOL. Hope all is good with you....
Rick: Great story. Thats one way of ensuring people dont die after the fact -extreme, but brilliant!!
Hope to update in a day or so......hopefully sooner
Jay
#
65
18-10-2011
, 09:40 PM
Lead Modeler - Framestore
Join Date: Feb 2003
Join Date: Feb 2003
Location: UK
Posts: 6,287
https://www.arizonaskiesmeteorites.co...ler-Sculpture/
Jay
#
66
18-10-2011
, 09:50 PM
Moderator
Join Date: Jan 2004
Join Date: Jan 2004
Location: Michigan, USA
Posts: 2,998
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
#
67
18-10-2011
, 10:09 PM
Lead Modeler - Framestore
Join Date: Feb 2003
Join Date: Feb 2003
Location: UK
Posts: 6,287
#
68
18-10-2011
, 10:18 PM
Senior Software Developer
Join Date: Jan 2005
Join Date: Jan 2005
Location: Livingston, Scotland
Posts: 1,701
---
I am here: https://maps.google.com/maps?ll=55.899036,-3.530624
publicFunction (Chris) - Sent from my iPhone using Tapatalk
Chris (formerly R@nSiD)
When the power of love overcomes the love of power the world will truely know peace - Jimmy Hendrix
Winner SM VFX Challenge 1
3rd Place SM SteamPunk Challenge (May 2007)
#
69
18-10-2011
, 10:20 PM
Lead Modeler - Framestore
Join Date: Feb 2003
Join Date: Feb 2003
Location: UK
Posts: 6,287
#
70
18-10-2011
, 10:55 PM
Lifetime Member
Join Date: Feb 2010
Join Date: Feb 2010
Location: Australia
Posts: 4,255
bullet1968
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes
#
71
18-10-2011
, 11:15 PM
Lead Modeler - Framestore
Join Date: Feb 2003
Join Date: Feb 2003
Location: UK
Posts: 6,287
J
#
72
21-10-2011
, 11:38 PM
Lead Modeler - Framestore
Join Date: Feb 2003
Join Date: Feb 2003
Location: UK
Posts: 6,287
added the prop, need to tweak the holes in the nose now so its spot on.....
cheers
Jay
#
73
22-10-2011
, 02:29 AM
Moderator
Join Date: Jan 2004
Join Date: Jan 2004
Location: Michigan, USA
Posts: 2,998
1. what is the shader on your ground plane?
2. what is your env color values? Is the value higher the one?
I ask because your AO renders are much brighter then the results I am getting. I also fo not seem to be getting any shadows cast on the ground plane but it is clearly affecting the underside of the objects. Look at the render from the bottom of the bike part. I had to turn the ground plane off because it was black.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 22-10-2011 at 02:44 AM.
#
74
22-10-2011
, 02:45 AM
Moderator
Join Date: Jan 2004
Join Date: Jan 2004
Location: Michigan, USA
Posts: 2,998
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
#
75
22-10-2011
, 04:07 AM
EduSciVis-er
Join Date: Dec 2005
Join Date: Dec 2005
Location: Toronto
Posts: 3,374
Posting Rules Forum Rules
Similar Threads
Topics
Free Courses
Full Courses
VFX News
How computer animation was used 30 years ago to make a Roger Rabbit short
On 2022-07-18 14:30:13
Sneak peek at Houdini 19.5
On 2022-07-18 14:17:59
VFX Breakdown The Man Who Fell To Earth
On 2022-07-15 13:14:36
Resident Evil - Teaser Trailer
On 2022-05-13 13:52:25
New cloud modeling nodes for Bifrost
On 2022-05-02 20:24:13
MPC Showreel 2022
On 2022-04-13 16:02:13