Diatom
Well-known member
- Joined
- Nov 21, 2020
- Messages
- 157
- Fluid Motion Model
- R-21
- Hull Identification Number
- FMLC2613A111
- Vessel Name
- Misty Blue
- MMSI Number
- 316022604
Sudden onset: wake/rooster tail suddenly includes an asymmetric water "jet" shooting up/back from port aft corner.
The "jet" is more intense than a full-blast garden hose. It impinges intensely on my 7' dinghy lower pontoon (dinghy on weaver risers above swim grid, pontoons on port side). This is not the typical low-speed burbling swim-grid flood, it's like a small fire hose on port side only.
Conditions: high speed 3580 RPM 30 kmh tabs down considerably. Normal temp 196F. Wake looks otherwise normal. Tab performance normal/responsive/level. Speed on familiar route seemed a couple of kmh slow, could be current/wind. Just filled with diesel, solo cruise. No known impacts, no obvious impacts on BRNKL log past 7d. Lots of kelp & crap in the water. Prop behavior seems normal - no unusual vibrations etc. From swimgrid I see a fair amount of seaweed starting to recur on tabs. Rudder looks/behaves normally. Recent trips have included some pretty heavy waves in Georgia Strait and shallow sand off Sidney Island. Recent starboard-tie Steveston mooring port-exposed to river flow, lots of debris. Exhaust flapper in typical condition, mobile but at rest is half-open. No finger-palpable obstruction in distal end of exhaust. Not listing, near-empty bilge as usual.
Any ideas?
/tmm
The "jet" is more intense than a full-blast garden hose. It impinges intensely on my 7' dinghy lower pontoon (dinghy on weaver risers above swim grid, pontoons on port side). This is not the typical low-speed burbling swim-grid flood, it's like a small fire hose on port side only.
Conditions: high speed 3580 RPM 30 kmh tabs down considerably. Normal temp 196F. Wake looks otherwise normal. Tab performance normal/responsive/level. Speed on familiar route seemed a couple of kmh slow, could be current/wind. Just filled with diesel, solo cruise. No known impacts, no obvious impacts on BRNKL log past 7d. Lots of kelp & crap in the water. Prop behavior seems normal - no unusual vibrations etc. From swimgrid I see a fair amount of seaweed starting to recur on tabs. Rudder looks/behaves normally. Recent trips have included some pretty heavy waves in Georgia Strait and shallow sand off Sidney Island. Recent starboard-tie Steveston mooring port-exposed to river flow, lots of debris. Exhaust flapper in typical condition, mobile but at rest is half-open. No finger-palpable obstruction in distal end of exhaust. Not listing, near-empty bilge as usual.
Any ideas?
/tmm
