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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Wednesday, December 26, 2007

The After Party

~ Nathalie & Olivier of P'tit Louis ~



The boys had been super anxious to let off some fireworks (firecrackers). We let them buy some before we crossed over into Florida back in January of 2007. By this time, those ones were buried in the horrendous stacks of things we probably don't need in our storage unit in Labelle. We bought more for our launch/New Year's party, and they immediatley went into action. They built a little gaff rigged schooner aptly named SV Murple, out of blue foam, twigs and recycled pieces of paper. Then they added little explosive tanks to the ships cargo. Second they built a little itty bitty steam ship named SS Nurgy which was rigged to explode with on board underwater firecrackers. The war was watched and enjoyed by about 40 spectators on shore soon after dark.



Attention on deck Free Spirit, I think we are under attack by SV Murple!!!!

:-)


Smiling girls are what you need at any launch party!!

Margaret ~ Drummer / Deana ~ Gypsy Queen

Deana.... Thank you so much for making what could have been one of the most stressful days of my life more than tolerable. She went above and beyond to ALWAYS be there when I turned around needing something. Launch day for us was not only exciting, but a lot of hard work. I was also trying to prepare for this huge party in the evening. You are a dear and wonderful friend, I really appreciate all you are :-)



Shortly after we purchased Free Spirit in December of 2003, our good friend Gina joined us in Fort Lauderdale the middle of January 2004 for Tamer's first visit to the boat. During an evening involving a few cocktails, we made a very special toast.....

To love and to lust
to the friends that we trust,
and the good ship Free Spirit
all covered in rust!

This was written on the back of a used piece of notebook paper, and was found again during the latest refit. When it came time to toast in the new year, and the success of our launching, a new toast was made by Gina.

To love and to lust
to the friends that we trust,
and the good ship Free Spirit
no longer covered in rust!



Champagne for the alcohol drinkers, and Martinelli's for the non...



Fireworks, finally!! Right at midnight, as usual :-)



~ Peacefully sleeping in the slipway ~

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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 =