Log of SV Free Spirit and ships company

The chronicles of the schooner Free Spirit and her crew, embarking on an open ended journey upon the great rolling heap. Free Spirit is currently pursuing humanitarian and commercial goals in the Dominican Republic, on the island of Hispaniola. Working under the Ocean Reach USA and Paradigm Research banners, she is serving as logistics headquarters, workshop, and development laboratory for many ongoing projects. This is the log of her journey.....

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Thursday, March 13, 2008

SV Wahini

Back in November, out at Glade's we had the pleasure of meeting the Thompson Family of SV Wahini. We started talking because we happened to have Free Spirit in the exact same place in the work yard that their steel boat Wahini had been for 18 months. Robert is a professional welder, Terrie is a chef and their only son still at home is a wonderful 8 year old named Robbie. We did not see them again until our first trip into Labelle back in January. They have since become good friends and have gone above and beyond to be kind to us. It was really nice to have some local friends to hang out with!

Here they decided one week-end while we were in town, to bring Wahini from Port Labelle into the city dock to clean her up a bit. They are in the process of figuring out when they will move aboard, and were very inspired by our journey. It is amazing to me how fast like minded people can become close friends.... It is great to share a dream :-)



Terrie working hard cleaning the topsides of her ship. I was outside applying epoxy to the newly built plywood deck boxes, so we talked between the boats as we worked. After she was done, she offered to help me, and learn a bit about epoxy/cabosil/micro balloon application.



Wahini is a Thomas Colvin design and I 'think' 60 feet overall. Here they are headed back to Port Labelle for storage until the next little journey.



When we left Labelle, Terrie happened to be waiting to cross the swing bridge headed home from Fort Myers. When she looked east down the river she spotted Free Spirit, got out of the car, and wished us well on our journey. Part of the journey that we are embarking on includes a sadness when we have to leave newfound friends. But the beauty of this is the fact that we will always have connections to places with memories of good friendship....

Thanks you guys, for all you time, effort and encouragement!! We cannot wait to share cocktails on the beach!!



2 Comments:

Blogger Gayle said...

Oh where, oh where have my friends gone? The last time we spoke some vaccinations were involved...you were going to call. Have you gone back to Florida? Are you here? Waiting and watching....

5:21 AM  
Blogger Gayle said...

Oh where, oh where have my friends gone? The last time we spoke some vaccinations were involved...you were going to call. Have you gone back to Florida? Are you here? Waiting and watching....

5:21 AM  

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Introducing Propcalc 4.0

Use Propcalc to easily match your hull with your engine, transmission, and propeller
Put the known data in the top fields, then hit the Update button to get the answers.
Results, of course, should be verified by a Naval Architect or qualified surveyor.
Data is provided for three bladed propellers of average type
For two or four bladed props, use the modifiers shown below.

Fill out the fields as follows:

Vessel LWL (ft) = Waterline length
Vessel Disp (lbs) = Vessel displacement
(max) HP = Rated Engine Max HP
Engine RPM max = Engine RPM at Max HP
Engine RPM cruise = Desired or estimated cruise rpm
(Cruise or Max) Kts = Speed to work the calculations for
Slip = Propeller efficience. 45% is average for a displacement cruiser.
Gear ratio = 1: Gear ratio of transmission
SL Ratio Adj. = This value will be added (or subtracted, if a negative value) to the calculated S/L ratio.

Key information:

If the "hp required" is greater than the "cruse HP", you have your cruise RPM set too low for your engine parameters.
If the "hp required" is significantly less than the "cruse HP", you have your cruise RPM set too high for your engine parameters.
If the "hp required" is greater than the "Max HP", then your target speed is too high for your engine/hull parameters.
The S/L ratio is calculated automaticaly based on your input. It can be adjusted if necessary, but normally it should be left alone.
If the calculated S/L ratio exceeds S/L MAX, then the results are likely to be non-predictive. Try a lower speed requirement.
SL Ratios of 1.1 - 1.4 are typical of displacement hulls. Semiplaning or planing hulls can go higher.

Typical propeller slip values:

Sailing auxiliary, barges, etc less than 9 Kts............45%
Heavy powerboats, workboats 9 - 15 Kts....................26%
Powerboats, Lightweight Cruisers 15 - 30 Kts..............24%
High speed planing boats 30 - 45 Kts......................20%
V bottom race boats 45 - 90 Kts...........................10%


Note:

it is possible to get irrational answers by irrational input , I.E specifying excessive speed for hull type and length
Any attempt to exceed hull speed (1.34 times the square root of the waterline length in feet) with a displacement hull are likely
to fail unless the hull is extremely fine (multihull) or otherwise exceptional. In such cases, an S/L adjustment would be in order.

2 and 4 bladed props:


For two bladed propellers, multiply the diameter by 1.05, and the pitch by 1.01
For four bladed propellers, multiply the diameter by .94, and the pitch by .98


PROPCALC
  Inputs:
Vessel LWL (ft) =
Vessel Disp (lbs) =
  (max) HP =
  Engine RPM max =
  Engine RPM cruise =
  (Cruise or Max) Kts =
  Slip =
  Gear ratio = 1:
  SL Ratio Adj. =
   
    Solutions:
  Prop rpm max =
  Prop rpm cruise =
  Pitch =
  Diameter =
  Static Thrust =
  Cruise HP =
  Cruise HP% =
  SL Ratio =
  DL Ratio =
  SL Max =
  HP Required =