Monday 27 March 2017

Testing Stage Two, Prep #2

Not much to show in this update, I've been slowly getting the pipes in and painting various parts.  I cut out some rubber to use between any metal on metal contact points to stop them being scratched.

All twelve valves for the air system are also in.  I have notice that one of the brass fittings is cracked, which will need replacing.  It was either tightened to much or the whole unit fell at some point.

27/03/2017

Progress has ceased the last few weeks due to the removal of my appendix.  But today I have resumed work and have decided to change a few things on the sub that will reduce the amount of work left to do.

  • Firstly, I'm planning to use stepper motors to control both the diving planes and elevators instead of a mechanical system.  The elevators (at the rear) will still have cables, but the motors will drive them rather than a handle.  This will save space near the seat as well as time designing the rest of the pulleys required for for the cables.
  • Also I'm probably going to do away with the speed controller for the motor.  Despite the fact this will take a while to do, I'm not sure yet exactly how much horsepower it will take to move at a decent speed.  So I've decided to simply have a relay to turn the motor on or off.  If full power is to much for fine tuning the subs position, I will add in the controller later.
  • I'm still undecided if I will keep the rudder pedals.  Either I do away with them completely and use a stepper motor, or I can use the stepper as well.  I'll think on it a bit more.

Tomorrow I'll be putting together the water proof system that brings the motor cable into the sub.  I also plan to put in both top and bottom dash boards.