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 Space Shuttle Ultra Support & development threads for Space Shuttle Ultra addon.

 10-25-2018, 07:32 PM #2056 Urwumpe Not funny anymore Quote: Originally Posted by GLS  Looking at the elevon seal panels, 2 sets of 4-bar linkage equations should be able to properly animate them... the problem is finding the positions of 7 points (6 as we have the elevon hinge). Better leave things as they are for now, as there are more important things to do. Actually, its much simpler than a 4 bar. https://ntrs.nasa.gov/archive/nasa/c...9850008652.pdf
 10-25-2018, 09:15 PM #2057 GLS Addon Developer Quote: Originally Posted by Urwumpe  Actually, its much simpler than a 4 bar. https://ntrs.nasa.gov/archive/nasa/c...9850008652.pdf That's where I was looking (figure 7). I think 2 are needed: the first to calculate the rotation of the bellcrank from the elevon rotation, and the second to calculate the rotation of the panel seal from the rotation of the bellcrank. Anyway, that's in the future...
 10-25-2018, 09:24 PM #2058 Urwumpe Not funny anymore Quote: Originally Posted by GLS  That's where I was looking (figure 7). I think 2 are needed: the first to calculate the rotation of the bellcrank from the elevon rotation, and the second to calculate the rotation of the panel seal from the rotation of the bellcrank. Anyway, that's in the future... Or...simply calculate the point where the elevon seal touches the elevon.
 10-26-2018, 05:39 PM #2059 GLS Addon Developer Quote: Originally Posted by DaveS  And here's what I have measured as far as conversions between the coordinate systems go: Code: ```Xo0 = mesh/Orbiter Z24.4118003 Yo0 = mesh/Orbiter X0.00000 Zo0 = mesh/Orbiter Y-10.922``` Compared with the animation data on the SSMEs, there seems to be a 0.4852m offset in the Zo-to-Y value, so it should be -10.4368. ---------- Post added 10-26-18 at 06:39 PM ---------- Previous post was 10-25-18 at 11:34 PM ---------- ^^ any news on this? I made a spreadsheet to ease the conversion between the 2 systems, but I'd like confirmation of the values before I commit it.
 10-26-2018, 06:01 PM #2060 DaveS Addon Developer Quote: Originally Posted by GLS  Compared with the animation data on the SSMEs, there seems to be a 0.4852m offset in the Zo-to-Y value, so it should be -10.4368. ---------- Post added 10-26-18 at 06:39 PM ---------- Previous post was 10-25-18 at 11:34 PM ---------- ^^ any news on this? I made a spreadsheet to ease the conversion between the 2 systems, but I'd like confirmation of the values before I commit it. You're correct, I miscalculated the Zo-to-Y value. Our Y0 is located at Zo410 which is location of the PLB sill longerons which converts to -10.414.
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 10-26-2018, 06:30 PM #2061 GLS Addon Developer Quote: Originally Posted by DaveS  You're correct, I miscalculated the Zo-to-Y value. Our Y0 is located at Zo410 which is location of the PLB sill longerons which converts to -10.414. It's up! No more miscalculations now.
 10-31-2018, 10:11 AM #2062 DaveS Addon Developer I have hit a bit of stumbling block on fixing the hole in the wing box (bottom of bays 12/13) with the current implementation of the liner as there was no liner there. This can be seen in this photo of the PLBD Closure in the OPF for STS-125(last mission to use the liner): https://www.dropbox.com/s/hl3msf1yp7...d2120.jpg?dl=0 So the implementation has to be changed to be like all the other mission-optional equipment, that only the liner is affected by the HasPLBLiner parameter and not the regular TCS blankets. We're talking about 793 faces here.
 10-31-2018, 10:28 AM #2063 GLS Addon Developer Quote: Originally Posted by DaveS  I have hit a bit of stumbling block on fixing the hole in the wing box (bottom of bays 12/13) with the current implementation of the liner as there was no liner there. This can be seen in this photo of the PLBD Closure in the OPF for STS-125(last mission to use the liner): https://www.dropbox.com/s/hl3msf1yp7...d2120.jpg?dl=0 So the implementation has to be changed to be like all the other mission-optional equipment, that only the liner is affected by the HasPLBLiner parameter and not the regular TCS blankets. We're talking about 793 faces here. Could those blankets in bays 12 and 13 be put in a separate group? That way we would only hide the forward ones and leave those always visible.
 10-31-2018, 11:18 AM #2064 DaveS Addon Developer Found this interesting document on NTRS on the PLBDs: https://ntrs.nasa.gov/archive/nasa/c...9790014389.pdf It includes a detail description of the PLBD motion mechanics with force measurements. ---------- Post added at 12:18 PM ---------- Previous post was at 12:17 PM ---------- Quote: Originally Posted by GLS  Could those blankets in bays 12 and 13 be put in a separate group? That way we would only hide the forward ones and leave those always visible. That could be done. I'll look at it.
 10-31-2018, 11:27 AM #2065 GLS Addon Developer Quote: Originally Posted by DaveS  Found this interesting document on NTRS on the PLBDs: https://ntrs.nasa.gov/archive/nasa/c...9790014389.pdf It includes a detail description of the PLBD motion mechanics with force measurements. It doesn't have what we need: torque shaft position and angle of rotation (figure 4), so the mechanism can be animated accurately. Currently those values are guessed and tuned so the PLBDs open what they should.
 10-31-2018, 12:04 PM #2066 DaveS Addon Developer Quote: Originally Posted by GLS  It doesn't have what we need: torque shaft position and angle of rotation (figure 4), so the mechanism can be animated accurately. Currently those values are guessed and tuned so the PLBDs open what they should. This photo of the torque shaft for the right PLBD shows where it is located: https://www.dropbox.com/s/v8auwcrla5...d1282.jpg?dl=0 Based on that photo, I would say that the coordinates for it are as follows: Xo660 Yo95 Zo402 The push/pull-rods are approx. 11 inches long and with the doors fully closed, have angle of approx. 2.65°s. When open, their angle is approx. 6.5°s.
 10-31-2018, 05:08 PM #2067 Donamy Beta Tester Oh God, what's going to get broken now ?
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 11-01-2018, 10:33 AM #2068 GLS Addon Developer I've just seen the result of my work in correcting the include dependencies: I changed the SimpleGPCSystem.h file and just had to compile a few files (the GPC software stuff), instead of recompiling the full solution.
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 11-01-2018, 12:33 PM #2069 Urwumpe Not funny anymore Quote: Originally Posted by GLS  I've just seen the result of my work in correcting the include dependencies: I changed the SimpleGPCSystem.h file and just had to compile a few files (the GPC software stuff), instead of recompiling the full solution. Yeah, SOLID is a great thing to remember. S - Single-responsiblity principle O - Open-closed principle L - Liskov substitution principle I - Interface segregation principle D - Dependency Inversion Principle

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