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!

Thursday, March 13, 2008

All Work & No Play Makes Us Dull

We had been promising the boys a trip to Universal Studios as a reward for when the boat was launched. We waited for Nana to come in March, and we finally made true to that promise. Here are all the boys in front of a very unique plywood painted structure.

Blayde getting coached to be part of a 'real movie'. He had to jump off the stage, and then it was added into a 3 minute movie trailer that showed him jumping off of a mountain!

Shep, just taking a moment to sit and relax in one of the chairs from the set of Van Helsing.

This was the stage for the special effects show. It was one of the funnest parts of our 2 days spent between Universal Studios and Islands of Adventure.

Here, a member of the audience shows us how easy it is to get your arm gashed open with a fake knife and a bladder of blood stored in the sleeve of the host. She ended up being quite freaked out by the whole thing!

My dearest Valin refused to humor me and join the other boys in a rare photo op with Shaggy and Scooby. I still feel that it would have been proper payback for all the Scooby Doo episodes I had to endure when they were little :-)

My ABSOLUTE favorite ride. It combines roller coaster, with 3D and 4D effects. We went on it more than any other ride!

If you are ever in need of a Super Hero, this is the place to be!!

Getting ready for our first roller coaster ride of the day. There were a few rides that Drake could not go on, so we tried to go on all the other fun ones, just for him. The first day that we were there, it was REALLY cold (about 50 degrees), and we did not go on any water rides. Even though the next day was a little warmer, we still froze our tushies off after riding them!

This just seemed 'wrong' to me.....

This is an aerial view from the strange little kids ride that went around the top of Dr. Suess land. I think that the kids would have enjoyed this area WAY more if they were younger. But it was very imaginative and colorful!

We figured that this may be the only opportunity for the crew of SV Free Spirit to practice 'saving us all from a killer shark!' :-)

Much to the boys' disappointment, the Simpson's ride was opening the next day. They all thought is was cool to at least get a picture to share with all of you!

~Another beautiful Florida sunset~


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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 =