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Bug #27279

Wings blocks engine exhaust unrealistically.

Added by [email protected] 14 days ago. Updated 3 days ago.

Status:
Confirmed
Severity:
Low
Assignee:
-
Category:
Aerodynamics
Target version:
-
Start date:
02/14/2021
% Done:

10%

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

Description

I noticed that this doesn't count as thrust, as it should. You have to pitch up or down to thrust take effect.
https://steamcommunity.com/app/220200/discussions/0/4956744526896493135/

This bug is brought from steam conversations where someone wondered why this plane doesn't move without pitching up or down.

This is might be bad design of plane but anyways it should work.

History

#1 Updated by [email protected] 14 days ago

Exhaust/thrust gets blocked on this case by tail wings.

#2 Updated by Dunbaratu 14 days ago

Not sure how to fix this easily without engine thrust magically working anywhere on the ship even inside a closed container. About the only thing I can think of is instead of one spherecast or raycast out the back of the engine (which I assume is what the check is using), do multiple raycasts - one from the center and several from the outer ring of the engine nozzle. These multiple points would be sort of a zeitgeist of generally how much of the thrust is getting blocked. If most of the array of rays misses a thing and only a few hit a thing, then there should be enough exhaust going "around" the blocking thing that it shouldn't count as a blockage. (So a wing edge-on wouldn't block the exhaust as it splits around it, but hitting the flat of a wing would because more of the raycasts in the cluster hit the wing that way.)

#3 Updated by [email protected] 13 days ago

Game engine knows which part blocks it, now it only needs to get it frontal coefficent and its surface area (game engine knows these too) and substract it from maximum possible coefficent (maybe use value of 2 here at first, change it later if possible.) to get affecting thrust.

#4 Updated by [email protected] 13 days ago

wrote:

Game knows which part blocks it, now it only needs to get it frontal coefficent and its surface area (game engine knows these too) and substract it from maximum possible coefficent (maybe use value of 2 here at first, change it later if possible.) to get affecting thrust.

As far as i know Game knows if part is inside of closed container.

Game doesn't calculate engine inside of structucal pipes, but engine still correctly gives thrust.

Other way to make this happen, is not to lower thrust of engines when they get blocked, but increase airflow value for parts it is pointed to, this way we actually could get more realistic aerodynamics, when engine is blowing fast air to rear winds and you pitch up/down or roll plane. It then adds engine exhausts as drag, trought affecting parts.

It could be interesting to see results of back wings of rocket/airplane reaching sonic barrier before front does.

#6 Updated by David.Wineinger 5 days ago

  • Status changed from New to Confirmed
  • % Done changed from 0 to 10

#7 Updated by [email protected] 3 days ago

If this gonna get fixed, i wonder how this would work on vacuum real life:
If engines are rocket engines which pushes wings at vacuum, would rocket turn because of that or does flow work different way at vacuum? =>
Would flow break up faster or slower than at atmosphere, because of lower air pressure.
My guess is there would be slight turn, but not very big. That's why they uses huge engine bells at vacuum to prevent flow from being eaten away.

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