In the Pilots_Manual_For_COTS.pdf file in Chapter 2, Quick Start Guide it has the following:
You might want to make sure you've followed any other instructions in that chapter.Engines:
Ensure "Enable auto-mixture" is not checked. The Stratocruiser has a fully working automatic mixture control and this will interfere with our extensively documented and modelled mixture system.
The engine sound issue is a known problem. It's baked into the design. However, you can fix it by following the instructions at the following link:
viewtopic.php?f=37&t=40948#p312718
Read the entire thread.
The bounding box fix is optional and probably won't affect the sound that much. The warning to back up any files before changing them is crucial.I solved the external engine volume by editing the sound.cfg file as follows.
Find 32 occurrences of the string:
OutsideConeVolume=9000
after each one add the following line:
full_scale_distance=100
This should fix the external engine sounds.
As for the bounding box, I used a free program called RADitor to edit the bounding box radius. From my notes:
Used RADItor to change radius from 31.178 to 20, chase distance is now better, save files should have camera.1.6 chase distance at 80, not 124 or 36 or whatever, all bounding boxes are off but length, but radius is probably the only one that needs to be changed. Beyond that, you're on your own.
Be sure to back up any files before changing them in case things don't work the way you wanted.
Hook
NOTE: My current version of the sound.cfg file has "full_scale_distance=500" rather than 100, so you might want to try that value instead.
Hook