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

Re-Rigging & Raising The Masts

Every single one of the wooden blocks for our rigging had to be completely overhauled. Raoul took on this project with excitement. (Any excuse to work with wood :-)) It was a very important but time consuming project, Thanks Bro!!

Here he is cooking up some Linseed Oil - Block Stew.....

Soaking it up!

When we left Florida this past July, we left all the cable rigging in huge tubs of 'treatment'. It consisted of Boiled Linseed Oil, WD40 and Marvel Mystery Oil... Gallons and gallons of it as a matter of fact... Here they are being hauled out to drip dry for a few days before being re-rigged.

A few of the new and improved blocks, re hung at the top of the aft mast.

Tamer and Blayde beginning to reinstall the cables. When Tamer stored them, he wired a small stainless steel plate to each one, so that he would know where each one needed to go. Brilliant!!

Leonard, the wonderful man that plucked the masts for us, is here preparing to re-raise them with the Hyster crane.

Folks came from all over the yard to help us get the masts back in place. Tamer is here checking to make sure the strap from the end of the crane is in a good secure place.

The aft mast, getting off the ground.

About to come over the side; Olivier and Mallory look on...

Here it comes!!

Tamer and Alan (P'tit Louis crew), have to get it exactly in place to bolt it onto the deck.

The bolt being pounded in!

The crane holds on, while the shrouds are tightened to hold it on.

Rigging furiously!!
From Left to Right
Shep, Olivier, Mallory, Tamer, Raoul and Alan

Resting a moment before raising the forward mast.

Mallory, running to help with some crisis on deck. The forward mast is almost there!

Here are Alan, Olivier and Tamer attempting to get the 500 pound steel beast through the collar in the deck without scratching up the paint to terribly. Notice the carpet squares?

Margaret of SV Drummer watches from her laid to rest mast. I know she is eagerly awaiting the raising of her masts :-)

Drake, Valin, Blayde and Gina watching the operation from the deck of P'tit Louis.

I can hear Mallory thinking..... I sure wish I was out there :-) But instead Raoul gets to attach the head stays at the end of the bow sprit.

Ahhh! Finally some real fun! Mallory at the top of the mast reeving the halyards. Drake, Shep, Valin, Blayde and Tamer watch from the aft deck.

Shep, up in the crow's nest (doing something really important). He has taken so many trips up there now, that I cannot remember what task this was.... I think he is happiest up there though :-)

The last stages of rigging....

Free Spirit is once again ready for the water!!


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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%


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

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. =
  Prop rpm max =
  Prop rpm cruise =
  Pitch =
  Diameter =
  Static Thrust =
  Cruise HP =
  Cruise HP% =
  SL Ratio =
  DL Ratio =
  SL Max =
  HP Required =