Stress corrosion cracking, ISO 898-1 calls this out as a problem for these fasteners. The zinc-aluminum flake coating sounds like a very good solution and should be commercially available. I will pursue this route.
Today I have inherited several vessels with obsolete drive units and no factory support. The drives have submerged.structural flanges and are notorious for breaking bolts. 30 years later, I think it's time to look into a cause. The fastener are socket head caps screws of ASTM A574 standard and...
Waross, I'll have to to some digging. I had project that reduced ratings from 125/150kW to 99kW. The BSFC went up significantly going from 125/150kW down to 99kw. The engine size was reduced from 8.1L to 4.5L. The trouble is that the engine manufacturer only publishes BSFC down to 25% of rated...
Immediately before the failure, the majority of power on the grid was inverter sourced, not rotating. I have heard talk of motorizing retired generator units in order to improve inertia of heavily solar/battery supplied grids.
One supplier of ours that uses John Deere engines has strict back pressure limits on the fuel returns. We have to run checks because we have multiple engines sharing common returns.
I haven't heard about this incident. The writing of the article is very strange and doesn't explain the situation well. This article does a little better but both have similar references so there must be a parent pre-AI article somewhere...
As an operator of propellers, its obvious by watching the wash of a propeller that the concept of a tidal generator is totally absurd. The wash rapidly expands and fans out due to turbulence in the fast moving water. Trying to reverse that process and convert a small cross section area of that...
