Project

General

Profile

Bug #9360

LVL 1 aircraft gear explode, over-stressed at 10% loading

Added by dwilliam16 about 8 years ago. Updated almost 8 years ago.

Status:
Needs Clarification
Severity:
Low
Assignee:
-
Category:
Parts
Target version:
-
Start date:
04/21/2016
% Done:

0%

Version:
1.1.0
Platform:
Windows
Expansion:
Language:
English (US)
Mod Related:
No
Votes:
Arrow u r green
Arrow d r red

Description

Attached file for aircraft. Load into career with shown tech tree unlocked. Launch aircraft (yes, it's lightly tail heavy), SAS on, throttle up and try to take off. The level 1 dirt runway kills the craft with LY-05 over stressed, but monitoring the gear on take off it never went over 10-11%. Reload and taxi down to the grass, and at a whopping 8 m/s, the nose gear explodes on a bounce. Try again, get up to about 60 m/s and again a slight bounce kills the gear. Affects the LY-01 fixed gear as well. Heck, I just let the thing load and the gear destroyed it self after settling from physics load.

Only visual mods and KER installed.

Same results with no mods.

quicksave01.sfs (44.2 KB) quicksave01.sfs [email protected] dwilliam16, 04/21/2016 12:22 AM
Aero 1.craft (62 KB) Aero 1.craft [email protected] dwilliam16, 04/21/2016 12:22 AM
Palomino Gull.craft (53.3 KB) Palomino Gull.craft [email protected] Kardea, 04/22/2016 01:59 AM
Palomino Gull.craft (53.1 KB) Palomino Gull.craft [email protected] Kardea, 04/22/2016 03:02 AM
20160422104722_1.jpg (228 KB) 20160422104722_1.jpg [email protected] Kirk, 04/22/2016 08:47 AM
Science Plane.craft (80.9 KB) Science Plane.craft [email protected] Kirk, 04/22/2016 08:52 AM
17470

History

#1 Updated by Kardea about 8 years ago

I was able to replicate this exact issue. Same symptoms, same results.

#2 Updated by Kardea about 8 years ago

Update: I tried an alteration to the craft I posted earlier. This one dropped the straight-leg LY-01 fixed rear gear for a tail-dragger tripod design, all with the bugged LY-05s. It took off fine (with an upgraded Level 2 runway...)! Plane flew like a dream, right up until it was time to land. The millisecond the LY-05s touched the ground (at 35 m/s, no less!), all three exploded, complete with "Landing Gear overstressed" message. Something is definitely bugged with the LY-05's stress tolerance and/or clipping.

#3 Updated by Kirk about 8 years ago

I've not yet been able to construct a working airplane with the level 1 gears in career mode.

And the level 1 runway is just... counter-intuitive. There's a strip of grass next to it that is better for takeoff.

#4 Updated by Kirk about 8 years ago

Same here, can't land. Came in at 20 m/s, (make-shift) airbrakes deployed. Touched down with the back wheels first, but as soon as the front wheels touched the ground the whole craft went up in flames.

#5 Updated by Kirk about 8 years ago

17470

I've finally been able to land, by deploying all my ailerons as flaps, slowing down to 20 m/s, and landing with the back wheels first at a 30-40 degree angle. The resulting braking action slowed it down just enough to make the front wheel only heftily bounce instead of explode.

I attached a screenshot of the used craft. Note the weird wings to get the center of mass only ever so slightly in front of the center of lift. Otherwise it probably won't take off (actually, it took off by luck). I assume better designs are possible, but I was limited by the 30 (level 1) aircraft parts maximum.

I did upgrade the runway to level 2. I got tired of taxiing away from it.

#6 Updated by Kirk about 8 years ago

Oh right, the craft file.

#7 Updated by Kardea about 8 years ago

Tried again in multiple configurations. Nothing works, and nothing survives landing. Also, I noticed that the LY-05's have no brake functionality at all. The brake button does nothing at all (not even stopping it from rolling on the pad when it's loaded into the runway) and there's no brake tweakable. To be honest, I can't 100% remember if the LY-05 ever had a brake on it, but I coulda' sworn it did...

#8 Updated by Kirk about 8 years ago

When I launched a very small aircraft off the level 2 runway, I noticed the front (steerable) wheel had a habit of popping in and out of the runway with the tire bit. Also, the landing gear exploded when I attempted to ascend. I got into the air, but was no longer carrying landing gears :P

#9 Updated by dwilliam16 about 8 years ago

Until they can get a fix in place, I just edited the craft files to increase the stress tolerance and impact tolerance. Increase by alot they and much more reliable, took a proper bounce before breaking this time.

If you want to try it, the files are in Squad\Parts\Wheel\Landing Gear\ and are the "GearFixed.cfg" and "GearFree.cfg" and the lines to change are:

//stressTolerance = 2000  Original Value
     stressTolerance = 12000   //My changes
     //impactTolerance = 1000 
     impactTolerance = 12000

Is it overkill? Sure, but the sweet spot is probably somewhere in between the original and what I set it too. I didn't have enough time to play around with it (kids) and I've unlocked the next gear so it's not as important. If someone has the time to systematically back the values down to a more sensible range, go for it.

For comparison, the "GearSmall.cfg" for the next tech level has the values set to:

stressTolerance = 5600
     impactTolerance = 2000

Hope that helps.

#10 Updated by TriggerAu almost 8 years ago

  • Status changed from Confirmed to Needs Clarification
  • % Done changed from 10 to 0

Also available in: Atom PDF