Easy calculations

kjell, Sorry I haven't e-mailed you, I got the code and I'll have a look at it in the next week or so (I hope).

Cheers,

Tim B.

 

Thanks Wellydeckhand
If you need any help with the program pls. contact me on
kjellgood@gmail.com

 

I like to give my thanks to everyone that has contact me for the free Easy calculating program The program is now in position to be tested around the world.
I hope to have your comments soon.

 

Kjell.

is there anyway i could get the program too? no source code just the program.. for personal use... thank you in advance either way...

 

Yes.

Send me your name and post address to.
kjellgood@gmail.com

 

Kjell, have you tought to post your software as open source? On sourceforge or similar site? It may be guaranty that it will regulary updated, used,....

Regards,

Deki

 

No. This is one of personal gift to the interested people. I am working with an English version and I will let you know when it is ready.
Kjell

 

what happened to the english version
sean

 

I am working with the English version but due to health problems it will take time before it is ready. The Spanish version is very easy to use with the English Handbook.
Nobody has had any problems.

Kjell

 

i never did get it

maybe it got lost in the mail :|

 

Hi Marcos.
Thanks for your interest in my program.
The propcalc program was e-mailed to you the 07.05.2007.
Pls. confirm your E-mail address to.
kjellgood@gmail.com
and I will send you the program again.
Regards
Kjell

 

The free program offer is now ended and I like to thank all of you who has demonstrate your inters in my PROPCALC Program.

Otto Italy.
Welly Indonesia.
Tim B England.
Robert USA
Jörg Germany
Douglas USA
Guillermo SPAIN
Sander Te Netherlands
Delane Japan
Kobus Mozambique
Florent France
Jürgen Sverige
Robbie Australia
Randy USA
Roberto Italy
Marcos Venezuela
Ivan Croatia
Francisco SPAIN
Jerry
Manuel
Arcan3
Paul USA
FAUSTO PERU
Jeff USA
John
Nautical Rep of Maldives
Oktay TURKEY
Gilbert Puget Island
Kevin United Arab Emirates

Kjell Dahlberg, Mallorca, SPAIN.

 

I`ll be glad to receive your propcalc program to my e-mail: "perfect-gent@gala.net"
regards
Dimzik

 

Power calculation methods??

Greetings,

I have been fooling around with calculations to get the shaft power
required for a particular boat. Most methods use the inputs of
water-line length and weight. In the book, Propeller Handbook, by Dave
Gerr, Ch 2 outlines a method involving displacement ratio to get the
speed-length ratio and then using this to get the lb per hp required.
What makes me wonder about the method is that the results show weight
to have hardly any influence on the resulting required hp. I have
programed the few equations using a simple software available on the
web, so that I can get curves of hp versus length for various values
of weight. I wonder if any of you have experience with such
calculations, in other words what method would you use to get the
power needed to reach hull speed? I am mainly interested in the equations used.

Thanks, Irandar

 

Power for hull speed

As a rule of a thumb, 5 hp/tonne is enough for hull speed. Propeller efficiency (50-60%) and some service is included. You must use the mass of fully loaded boat.