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!

Sunday, May 06, 2007

Bugs, Bugs and More Bugs


The following post may be deeply disturbing to individuals who have issues with insects and spiders!!

Now, first of all, let it be known that we have NOOOOO love for these particular insects called, of all things, Love bugs. They have all but halted any productive work being done on the boat. The worst part about them is that they love the scent of any and all types of chemicals. One of their favorites happens to be paint of any kind, whether wet or dry (especially Amerlock). Above is a small chain plate that I had just painted on the rail about 5 minutes before the picture was taken. Little did we know that this was only the beginning of our struggles with them for the entire month of May.

Another example.....

It is really obvious in the above picture, the areas that I had prepared and painted only about an hour before. Keep in mind, what you see here, is after Drake had followed me around while I was painting, pulling the love bugs off with tweezers.

It was at this point that I about broke out into hysterical crying mixed with maniacal laughter!!! The worst part was sanding them off the next day..... Not only were some still alive, but the sanding left behind the outsides and insides of the ones who perished. EEWWWW. It was Tamer's mom Sherron's first experience with helping us while she visited for 2 weeks.

Aaaaawwww, now we are to the fun stuff!!!

Although prolific in the area, we do not have any pictures of Black Widows, only Brown Widows. Both of which have the same distinct egg sack, and both we have had to destroy many times. The above spider was inside a small coil of rope in the basket of Tamer's bike. She had about 5 egg sacks that also had to be crushed.

Here is another one found a couple of days later, on the underside of a wood scaffolding frame.

Same one as above, but without a head, used to show the hourglass marking on her belly.

We found this little velvet ant on the ground outside the trailer one morning. We put it inside a bug container to take pictures of her, but after we found out more about it, we let it go.

We encounter about 5 new insects a day done here, now that Summer is approaching. It is an environment that none of us are used to, so we find it really fascinating!

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 =