Does anybody have a link that leads to home built clamp on peddle power? The commercial version cost $1100 and that is more than I am willing to spend. Besides, the children have grown and moved on to automobiles; now I am watching several bicycles dry rot in the garage.
Here are some links to human-powered vehicle sites. They contain ideas, instructions and some blueprints for all kinds of Human-Powered Vehicles.
http://webpages.charter.net/rcgilmore/Illustrations.htm
http://www.ihpva.org/
http://www.ihpva.org/hpva/
http://www.humanpoweredboats.com/
I hope this helps.
Semper Fi!
Thank you for the links towards Human Powered Boat Here is the following links that I found really helpfull to start my winter project 
http://www.wisil.recumbents.com/wisil/h … _drive.htm
http://www.jemwatercraft.com/pontoon.php
http://www.motherearthnews.com/library/ … edal_Boat/
Hopefully, if my better-half gives the green light this looks like a father & son project that should provide years of adventure. :o