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, October 10, 2006

Diamond


This is a modernized version of the school that Gram (Kathleen) used to teach at. Throughout the time that we were meeting our distant cousins, She was described to me perfectly; A "real" lady, a person that everybody "loved". I could not agree more, and wish that she was still around to teach the boys. If I have my stories correct, this may also be the schoolyard that Dad almost burned down when he was about 6....





I really need to find a use for this chandelier on the boat!! I loved it sooo much and it is very simply constructed. I never was very impressed with the fancy dancy crystal ones anyway :-)




We had stopped here to hear the story about Dad and Pop having to walk from around here to the main road, about 10 miles out. He was not certain that this was "exactly" the place, but worthy of a look anyway. Within about 5 minutes of touring the old house, Blayde found himself a genuine arrowhead. Of course, this led to those "treasure hunting Smyth's" to look a little more. We found an enormous amount of obsidian in this area in various states of construction. We only found 2 more actual arrowheads, but many tips and bases. This was also the place that we saw the only snake so far on this whole trip. Of course, it would be fun to say it was a really scary rattler, and we killed it for stew....But he was a harmless little grass snake.....



1929.... Wow.... The Diamond Hotel was once owned by Hyson Smyth.




Need we say more??




Blayde has spotting something big in the brush, some kind of a wild animal... The search is on!



We never tire of seeing the travelling rig.... Actually this picture was taken beside the old Diamond Dance Hall. Behind the van and across the street (where the road signs are), is where Dad and the family used to live way back when.


The Diamond Hotel (just down the street from the Dance Hall). We perused the gift shop, bought ice cream and sat out on the enclosed porch while the boys played cards. This is where my majestic chandelier was hanging :-)

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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 =