About sixty to seventy per cent rpm seems necessary. I have been warned that the steering and brakes are sensitive, so I check we’re centred and straight, clamp the rudder pedals as best I can and ...

The Great Lakes research ship ‘RV Blue Heron’ (left) and the mysterious goo that was uncovered on the ship’s rudder shaft (right) CREDIT: Lisa Sundberg/Cody Sheik. Get the Popular Science ...

So, when we dropped the rudder post down, there was just a large amount of this goo that came rolling down the rudder shaft.” What does it look like? “It kind of looks slimy.

Steered with our Hydrovane windvane’s auxiliary rudder. But lowering the bent rudder shaft by 2 inches and drilling the quadrant mounting bolts higher Ketch rigged, was able to balance the rig and ...

Fixtureworks’ shaft mount fasteners securely join two shafts together. Fixtureworks shaft coupling clamps with corresponding and locking receptacles below, including the safety-lock clamp (right).

So, when we dropped the rudder post down, there was just a large amount of this goo that came rolling down the rudder shaft.” What does it look like?

So, when we dropped the rudder post down, there was just a large amount of this goo that came rolling down the rudder shaft.” What does it look like? “ It kinda looks slimy. It looks kind of like what ...