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, July 08, 2008

Discovering Oriental 6-28/7-3

Big boat! There were quite a few barges running the ICW with us, so we took care to give them the channel when we could. A little courtesy goes a long way, I can remember from my days playing "tugboat" in the gulf of Alaska. Sail around imagining that your bow sticks out another 200 feet and you can only marginaly turn, and you can have a peek into the head of a barge pilot....

Blayde, taking point on the way in to "mysterious creek" ... a little creek off the main channel that we anchored off to explore....Little did we know what lay in wait for us.....

.....A dead end, not 100 feet off the channel. It wasn't a creek at all, but a little inlet made perhaps for livestock to drink from.

On the way back out to the channel from "mysterious creek". Not too long after, we arrived in Oriental, with its reported "plenty of room to anchor" ....

A sad sight, a little 22' Catalina? that sank in a squall just hours before we got there. We heard it on the radio - she got knocked down, and I guess that no one released the sheets, as she filled by the fore-hatch and sank on the spot. We offered assistance with our inflatable things and air compressor, but the I think the Tow boat US operator was irritated by the prospect of our lowering his salvage bill, and honked us away, sirens blaring, like some kind of wanna be coastie on crystal meth.

The harbor at Oriental, as it turned out, was a bit small for our little ship, and as we have learned since, "plenty of room" usually means for a thirty footer. Most folks just cant get their head around the fact that in 15 feet of water, we need 15*5 = 75 (anchor line) + 65 (length) + 5 x 8 = 40(roller above the water) that's 180 foot radius... or a little more than a football field of swinging room (360ft) , all told. Twice we had to move out of the harbor around 2 AM in a thundershower, with poorly anchored boats blowing up against us, so the next night we spent out and slept well, despite the little swell.

Insufficient harbors and bad anchoring manners aside, we found the town very accommodating. Raoul and Dave both found temporary employment, and the facilities provided by the town were excellent. We were even invited to join in some community activities for the boys, and felt very warmly welcomed by this picturesque little fishing village.

Drake, running trash to shore solo. A proud day for this boy and his parents. They grow up so fast, don't blink or you might miss it!

Sunset under the bridge. Despite the late night thunderstorm drama, the harbor was quite pleasant, and comes highly recommended for boats up to 35 feet or so. The western part of the harbor is quite shoal, so if you draw more than 4 feet you should stay close to the seawall side if possible.

Frog footed vines... Not what they are called of course, but they were neat anyway...

The community theatre, where the boys were graciously invited to participate in a youth theatre workshop. They were very thankful for the opportunity, and had a great time... thank you, Oriental!!

Jellyfish.... They kept getting caught in the sea strainer and plugging the cooling water. Yech!! A slimy job to clean up, both times.

The Barnacle bike, covered completely with barnacles.... Ironically, the seat was covered by a bag to keep it dry!


Anonymous Anonymous said...

Hey Tammer, Laura, Blayde, Valin, and Drake, nice to see Free Spirit and crew are doing well. Take care. ---------Hank and Dee Smith

11:28 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%


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 =