The ChuggingDiesel_V1-21.zip file you have requested: Modifications / Sound Mods / Chugging Diesel v1.21 - 906.68kb is not available. Perhaps try browsing all files for the game Silent Hunter III and upload any files you want to share or are missing. This is the only information we could locate:
JSGME ready mod for Silent Hunter III. My last reworking of 2 .wav files that are meant to make the engine sound "throatier". Silent hunter 3 engine sound mod.