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Flightdeck Problem

stuart277

SOH-CM-2025
Hi All
I have been working on LST's being used as 'Carriers' and have run into a problem with flightdecks.

I have an LST with a flightdeck.
The aircraft sits on the flightdeck well enough.
However when it starts to take off 'fall's through the flightdeck after about 20-30metres. ie it does not reach the end.

I have tried a few alterations to the .ship file but to no avail.

Here is the ship file.

[fltsim.0]
title=USN_LST_906_Carrier_LOD
sim=USN_LST_906_Carrier_LOD
model=
panel=
sound=
texture=

[flight_deck_section]
; this section defines the control points the
; AI (and LSO) use to steer towards the flight deck
width=5.3719
length=48
takeoff_start=0,9.5,-8.00
takeoff_stop=0,9.5,58.00
landing_start=0,-500,-5000
landing_touch_down=0,9.5,-8.00
landing_stop=0,9.5,-8.00


[platform.0]
vertex.0=7.5,9.5,-17.941
vertex.1=-7.5,9.5,-17.941
vertex.2=-7.5,9.5,58.00
vertex.2=7.5,9.5,58.00



The second problem is similar.
I have a LST set up with the "Brodie System".
For this I have used a transparent plane (GMax)
Again, the aircraft sits on the invisible flightdeck well enough.
However when it starts to take off 'fall's through the flightdeck after about 20-30metres. ie it does not reach the end.


Here is the ship file.

title=USN_LST_776_Brodie_LOD
sim=USN_LST_776_Brodie_LOD
model=
panel=
sound=
texture=

[flight_deck_section]
; this section defines the control points the
; AI (and LSO) use to steer towards the flight deck
width=21
height=11
length=115
takeoff_start=-18.633,11.0,-35.0
takeoff_stop=-18.633,11.0,60
landing_start=0,-500,-5000
landing_touch_down=-18.633,11.0,-45
landing_stop=-18.633,11.0,15.0


[platform.0]
vertex.0=-8.5,11.0,55.0
vertex.1=-8.5,11.0,-60.0
vertex.2=-30.5,11.0,-60.0
vertex.3=-30.5.0,11.0,55.0


[LANDING AIDS]
cable.0=-8.5,11.75,-41.5,-30.5,11.75,-41.5
cable.1=-8.5,11.75,-36.5,-30.5,11.75,-36.5
cable.2=-8.5,11.75,-31.5,-30.5,11.75,-31.5
cable.2=-8.5,11.75,-26.5,-30.5,11.75,-26.5

Any help would be appreciated.

To help with this the platform on the LST is set up like this (and this may be the problem)

[platform.0]
vertex.0=7.5,9.5,-17.941 (-17.941 Aft end)
vertex.1=-7.5,9.5,-17.941
vertex.2=-7.5,9.5,58.00 (58.00 Forward end)
vertex.2=7.5,9.5,58.00

Cheers
Stuart

PS
The Brodie has Landing Aids to help with landing.
 
[platform.0] are jank AF, black magic and everything MS put in the ship.cfg about platforms is a lie IMO. The idea that you make 4 vertexs to draw a square deck never worked for me. I had to draw the square deck as 2 triangles.

vertex.# are in meters. Start at the back left than work forwards and work clockwise Do NOT overlap triangles.

Here is how I set up part of my LSTs platforms.

1739071883161.png

Here is the full layout for LST 906's platforms.

1739073209365.png

@stuart277 Try the below I think it will work.

[platform.0]
// Forward is 58.00
// Aft is -17.941
// Deck width is 7.5 and -7.5

vertex.0=-7.5,9.5,-17.941 //Back Left
vertex.1=-7.5,9.5,58.00 //Froward Left
vertex.2=7.5,9.5,58.00 //Forward Right
//
vertex.3=-7.5,9.5,-17.941 //Back Left
vertex.4=7.5,9.5,58.00 //Forward Right
vertex.5=7.5,9.5,-17.941 //Back Right
 
Last edited:
Hi Allen
Thanks for that.
All is good now.
Interesting that you have used 'triangles'.
I have used 'rectangles'.
The main thing is that the 'points' start at the left rear and go around in a clockwise direction.
ie
left rear
left front
right front
right rear

and
rear is -ve
left is -ve

Cheers
Stuart
 
Did my platform work?

Yes I meant go clockwise no idea what I was thing when I typed the text. I updated the text to fix that.

I beat my head in trying to make since of what MS put into the ship.cfg and it didn't make any since. Tried messing with any of the stock platforms and they also didn't make since as I exported CV6 and started drawing out each vertex and it didn't match was MS said to do.

Read this old thread https://sim-outhouse.org/sohforums/threads/patforms-and-ships.110862/ again nothing made full since. Than when I was trying to make rectangle I found I could only make part of it work and was left with a triangle shape so I made everything out of triangles.
 
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