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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Sunday, January 28, 2007

Finally Working!!




The new and improved workshop area and home for Free Spirit.... The post following this one will highlight this unexpected but welcomed transition...




Blayde had been awaiting an opportunity to find himself perched at the end of the bowsprit. He claims that it was much better than being at the top of the mast in a bosun's chair last year during our visit. I believe that this would be an amazing place to be while at sea, assuming that you had very secure safety lines holing you aboard. His job here was to catch a rope ( the following picture) and help to rig a device to haul a 700 pound crate out of a trailer, and place it below the bow of the boat for storage. He is such a strong and amazing boy!




Catching the rope.....




Headed back, rope in tow.... He actually ended up turning around and heading aft facing that direction.




Matt lending his great welding experience to the success of the day!





The Aft cabin is now as far apart as we think it needs to be. There was quite a few pin holes that needed to be fixed, as well as some big areas that needed new plating. In order to prevent fires, any area that will be welded on the outside, has to have a "safety man" in the interior on watch. I cannot believe how well the boys have stepped up to help us with this project. We would have a tough time doing it without them.



Blayde finding and marking with duct tape the pin holes that need to be welded.




Laura, working on the removal of the ENTIRE forward cabin.




Aaahhhh..... Finally it comes free!!




Drake diligently removing screws :-)

P.S. Valin was a very active worker during these projects, but somehow managed to stay out of all the pictures..... Thanks for your hard work buddy!!




Wow! What a shame to have to take everything out of an already furnished cabin. But, because of the length of time she has been sitting, there was a bit of rust in the bilges of this area. Also, because of the way the interior was installed, we were not sure what lay beneath the wood furnishings. All in all things look good, and we have already picked some different options for the layout, once we are ready to reinstall the cabin fixtures. This area will serve as a cabin for Blayde and Valin, as well as (hopefully) 2 small desks, and a large majority of their school books.






Olivier hard at work, enjoying the use of the lathe, fabricating parts for his boat Petit Louis.




~Tool Time at Free Spirit~

Hmmm....... I bet between the three of us we can figure it out :-)


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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 =