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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Tuesday, May 15, 2007

Finishing Touches

Here I am grinding away, finishing the last of the stanchions and chain plates on the deck. I started this project in February with the idea of doing a bit at a time.... I was really excited to get them all done, so that I could have an unfinished project out of the way!



A few days later, painted with 3 coats of amerlock.



We had been in quite a quandary over what method of insulation we were going to use for the hull. Because the boat is steel, it is not so much to protect against the cold, but to ward off condensation. We had found an insulating paint that they use on a lot of steel vessels, in industrial applications, but it was going to cost about $700 just to do the Focsul. So Tamer, being the genius that he is, researched for months on the subject, and found what we believe to be a great solution. We bought the above roof paint at Home Depot for $120 for ten gallons.

Then........



We added the above product, ThermaCels, to the paint for a cost of $100. This brought our total for 2 thick coats of insulating paint in the Focsul, to $220.



Tamer suited up and ready to go!



After the insulating paint was applied, Tamer then had to apply a total of 3 gallons of Rustoleum. the icing is on the cake! Now the focsul proudly displays a total of about 7 layers of paint!



Here is the boys' future bedroom after the painting was done and the flooring was installed.
It is amazing the look back and see what it looked like before we started. I am anxious to see the results when it is all finished.



Sherron, Tamer's mom, grinding away diligently on the new anchor locker hatch cover. She was sooooo amazing to have here in Florida with us. She not only helped me with my stuff, and played endlessly with the boys, but was always looking for a way to help! She has now been officially awarded the title as one of , "The Girls of Glades" :-)



Tamer, appearing to be headless, giving his Mom a hug.....

Thanks Mom!!

posted by CT | 12:34 PM

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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 =