J Geddes
  • Male
  • United States
Share

J Geddes's Friends

  • Mitchell Leary

J Geddes's Groups

 

J Geddes's Page

Latest Activity

Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"Hi Geddes, if you have acces to google drive, I uploaded there a few movies to illustrate the above windvane …"
Mar 28, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"here are two possibilities to transfer this vertical movement to the rudder tab. These parts are below the articulated screw that detaches rudder rotation from windvane rotation while allow push-pull vertical forces. The first idea is the same as…"
Mar 2, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"and here is the left-right movement of the wind flap crank is pushed down: crank is pulled up:"
Mar 2, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"sorry the image is so big, I halfed it but still big.. Now follows the bottom of the vertical shaft, just an idea about how vertical movement allowing horisontal rotation of the part that gets attached to the rudder. It needs to be exactly above…"
Mar 2, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"here-s a take on understanding horizontal axis wind vane pilot. There-s the yellow wing, its vertical push-pull crank system, fixed to a rotating drum ( this one should be rotated 360 deg by an actuator to change sail direction), a (whitish) holding…"
Mar 2, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"Here-s a nice  transatlantic attempt of a solar roboat https://www.youtube.com/watch?v=X7DLqQlfMp8 The site http://gotransat.com shows a lot of info - includes tracking data, hull building. They found a lot of local sponsors too."
Feb 22, 2015
J Geddes replied to Ben's discussion 3D sonar mapping in the group ArduBoat User Group
"I am no expert but take a look at http://www.mbari.org/data/mbsystem/ I understand that it can accept sidescan data but doesn't do a great job of overlapping imagery but you can use http://www.osgeo.org/ossim to do this."
Feb 21, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"Regarding foam cutting, you can source the nichrome wire on ebay http://www.ebay.com/bhp/foam-cutting-wire I've seen some are using guitar strings instead of nichrome. When I built mine I found harder to source a 300watts transformer, that…"
Feb 21, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"regarding the question you asked on http://engineering.stackexchange.com The simplest self-locking rotating actuator is one that uses a worm gear, like windshield wiper motor does. If that is too strong  for rotating only the wind vane mast,…"
Feb 21, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"Regarding Ceconite - it in itself is woven polyester. Of course UV can degrade it and water pass through if it werent a resin (or dope) and paint applied to it. The resin seals it and the paint protects agains UV.  The polyester fabric itself…"
Feb 21, 2015
J Geddes replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"I may have found a place here to construct my boat. Yours, however, looks like it is almost ready for the water! I have been thinking more about the design here:http://www.faymarine.com/plansite/images/1_SS_aux_rudder.GIF The 'course…"
Feb 20, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"looking into wing coverings, I found polyester fabrics very similar with those used in (ultra)light aircraft. There is Sig Koverall…"
Feb 17, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"It starts to look like a proa :) The tail vane, made of transparent polycarbonate is barely visible. It has a red trailing edge."
Feb 17, 2015
J Geddes replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"Yesterday I headed to the coast to find some boats with wind-vanes and to find somewhere to build a boat. No luck with finding wind-vanes, but I may have found two places to build a boat. And topped-up my sun tan :) I have a couple of hours free…"
Feb 16, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"Here-s a document about designing a rudder trim tab http://www.svsarana.com/selfsteering%20gear/sarana%20trim%20tab.pdf It is not attached to the leading edge, but like an airplaine's horizontal tail instead. Much more effective since there-s a…"
Feb 14, 2015
Cezar T replied to J Geddes's discussion Ocean-going drone in the group ArduBoat User Group
"whatever method is used to rotate the rudder (or windvane) there is still needed a method to read its actual position. An encoder. One method is to have the encoder on the motor shaft (or the screw shaft like they use on tiller-pilots), and…"
Feb 14, 2015

Profile Information

Please tell us a bit about your UAV interest
Water and air self-piloting craft
Hometown:
Daytona, OH

Comment Wall

  • No comments yet!

You need to be a member of DIY Drones to add comments!

Join DIY Drones

 
 
 

© 2017   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service