Not free but very, very useful/worth viewing.
Ivan Pettigrews site -if you haven't come across this elderly gentleman's work and your into flying off water and electric flight well ...you should look now...youl find his fans all over the place here included a master of multi motor low tech electric flight and hydro-aviation. Well I bought most of them
Tip watch the movies if you can and look for Ruddermans Martin Mars build thread.
http://www.geocities.com/ivansplans/
Check out his mate Hals site as well.
http://www.geocities.com/halsask/index.html
Try this guys videos for more of Ivans,Hals and the Chilliwack stuff in action
http://www.dvflighttech.com/
Uncle Willies plans page
http://static.rcgroups.com/forums/im...es/redface.gif not for the PC - fine range of old/vintage plans see the giant Seaplanes.
http://www.myunclewillies.com/piranha.html
VTH Main land Europe/German large choice
http://216.239.39.104/translate_c?h...%26sparte %3D2
UK X list pages...lookin other catagories aswell
http://www.xlistplans.demon.co.uk/waterpla.htm
Nexus RCM&E Modelflight....when they get back on line a huge choice from Giant Sunderlands down.......but chaps if we cannot see it we are unlikely to want to spend our hard won pennies......
http://www.modelflying.co.uk/aboutus.html
Uk Traplet ..sorry you have to search the lot but amongst the scale Electrics you will find a few rareities ...the Vickers, Supermarine Seagull 381 a personal favourite , the BR Natilus and a nice sports twin job Sampson
https://sslrelay.com/s84068217.onea...view.shopscript https://sslrelay.com/s84068217.onea...3D28MW2645%3D29
MAP plans for waterplanes but go back search scale and the rest theres more
http://www.modelactivitypress.com/ami_framesetpl.htm
Flying models
http://www.flying-models.com/
RCM seaplane plans- others in scale and elswhere so look around
http://www.rcmmagazine.com/e/env/00...ans-list-7.html
Quiet Flyer plans- not many but Cross sounder is here.
http://kionapublishing.com/catalog/...2a3c1a096a1bf17
Scale models Martin Mariner Dh beaver Machi M72
http://www.scalercmodels.com/rcplans.html