Project Brupegvideo
Building new engine beds in our steel expedition trawler - Project Brupeg Ep. 317
August 20, 2023 · 52 min · 37K views
What this video covers
Fabricating custom steel engine beds for a steel expedition trawler requires a precise sequence of mechanical alignment and structural welding. To establish the engine and gearbox position, the crew first bolts custom-made 12mm steel plates to the gearbox, then lowers the assembly into the bilge to align the output shaft with the propeller shaft.7:16 This vertical alignment determines the final placement of the engine beds.7:45 The crew uses a mag drill with a 16mm annular cutter to bore bolt holes in the steel plates, then uses a countersink bit to ensure bolt heads sit flush.2:32 Because the engine room environment prevents sandblasting, the crew uses a needle gun and coarse grinding to prepare the bilge surface for welding and paint adhesion.37:25 The design incorporates a 20mm gap between the new steel beds and the original structure to allow for a Chockfast epoxy pour, which provides a stable, vibration-dampening base.19:19 The final installation involves tack-welding the beds in place, grinding radiuses on all sharp corners to prevent stress risers, and sealing the joints with continuous weld beads to prevent water ingress and rust.31:15
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