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.....

Web sailfreespirit.blogspot.com
If you are joining us for the first time, click here for an introduction!
Books and more, at the Schooner Free Spirit Chandelry
Clothes and more, at the Free Spirit Logo Shop!

Saturday, December 13, 2008

Parade Of Sail Baltimore ~ October 15th

The Norfolk Rebel a Brigantine Tugboat, is one of the 2 original boats that participated in the 1st Great Chesapeake Bay Schooner Race. The Parade of Sail was a gathering of all the race participants (about 50 boats), sailing through the Inner Harbor in Baltimore.

~ Martha White ~

Our cousin ship "Adventure", is a Hout Bay 40, and was a beautiful shrunken version of Free Spirit! She is now reluctantly For Sale by the owner. Dudley Dix, both of our ships' designer was aboard her for the race and showed up unexpectedly on Free Spirit the day before the race started. We were very excited to hear more stories from him, and the kids were star-struck while he was aboard. Notice the smoke off their bow?? Who could possible be in a Parade of Sail without cannon fire??

2 of the guests that we had aboard for the Parade of Sail were Pat Brabazon and her mother. We also had Pat's husband Paul and their friend Ken.

Paul, and all 3 of the boys, each in thier race shirts,working to raise the foresail.

Captain and crew, tightening up the sails...

Sail and sun.... Two of our very favorite things!

~ Mystic Whaler ~

A nice example of the classic beauty of a Junk Rigged Schooner.

The Baltimore Aquarium

Well Hello!! This little guy was quite different looking :-) I look forward to seeing these types of interesting creatures while we are out in the big blue.

The boys hanging out in the aviary, the bird watching area of the aquarium.

Mom, wearing a very suiting shirt for the occasion.

That leg must get really tired :-)

This horrible looking toad like creature was bigger than Drake's whole hand.

A pretty yellow one....

The color of these frogs was almost comic book like.... I happen to really like frogs, but some of them freaked us out!

These were some sort of leaf frog.... And if I were not so behind on the blog, I might remember the exact name :-)

Just hangin' around, chillin', people watchin'.......

Come on, admit it, the first thing that came into your mind when you saw this picture was the Jaws theme.

I think that I would LOVE this job!

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 =