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Designing, Building, Operation and Discussion of Model Ships and Boats
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Current Activity

- The Dauntless Project has been on hold as I stumbled between other major projects trying to to solve a late-in-life crisis. Being over the "standard" retirement age but still working, I was searching for an Idea on how to turn a hobby into a profitable business. Building a model boat didn't qualify.
- My primary employer "retired" me in early 2015 so now I have time to pursue other projects of interest.

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RCS

The Remote Conning System (RCS)

This is a new concept of the Remote Operated Vehicle (ROV) or Remotely Piloted Vehicle (RPV) control applied to scale model boats. RCS is intended to provide realistic scaled control rather than real time instant response. That is why the term conning system is used. However, the concept can be utilized in any type of remote vehicle control when the human response time is not critical (fast). In this affordable system the display and use of the feedback will be generally too slow to be of use or value in any high speed real time application.

Reasonable application of  ROV control has been accomplished for explorer rovers both on land and under water and long range RPV aircraft of many types. The process is also well established in space and other distant world exploration but response is limited by radio signal delays. Low speed ROV’s are used to fulfill missions in the scientific, military, or hazardous investigation areas. All these applications are well established using the RCS type of feedback and are part of the inspiration for use of RCS in slow speed scale model boats.

Currently using RCS in the real time (speed and directional) control in standard R/C small field type model aircraft and all forms of high speed R/C model competition vehicles is not realistic. Scale slow operation is not desired. Data gathering and recording for later historical retrieval is the best application of RCS in these operating conditions. Speed and direction control must always be real time.

Operation of slow speed scale models could be made realistic in their rate of motion and directional control with RCS. In these cases, I am not proposing exact response scaling as I carefully selected the term realistic. The concept is the selective use of the RCS computer to introduce scale like response to commands from the com with complete override in panic situations.

This concept has been used in model train systems to provide realistic type locomotive and train operation for acceleration, drifting and braking.

A high tonnage warship certainly responds differently to helm and engine commands than a high speed personal sport runabout. The heavy ship will take a lot longer to power up, down and stop. Many boat and ship models can be grossly overpowered so they react with far better performance than the prototype craft.

With RCS it is possible to build “canned” effects into manual input and autonomous control sequences. Remember the sequences can be optional and turned off on on at will with proper programming (command) of the RCS computer.

My vision is the shore (captain’s) control will include a key pad as part of the interface. Any predefined control sequence can thus be sent to the TCS computer from the key pad via the data link to change on-board sequence of operations.

The key pad can also be used for control of any accessory or routines to control accessories. For example an entry code 789A might be used to turn on a mast light. Then code 789B used to start a computer sequence to blink the light on and off in one second intervals like a beacon. Finally 789C shuts the mast light off. It is all up to the imagination of the programmer and number of I/O pins with how they are programmed. That means there is almost no limit of the number or variation of realistic control functions available.

There are ways to extend control by using multiple processors to add additional I/O capabilities. That is far beyond the original scope of the RCS but certainly not unreasonable.

RCS – Remote Conning System

I have coined an acronym for the remote nautical control system I am designing and constructing for my roboboat project. I am calling it (as least for now) an RCS which stands for Remote Conning System. It has some precedence of use (display) in real ships control as can be seen in the following link:

http://www.syberg.no/conning-system/category179.html

There may be many others links to similar systems but this one provides an excellent presentation of what I am trying to accomplish with model boats and ships well before I discovered this link. I added the prefix term “remote” because of course, the Captain of a scale model must “take the con” remotely.

The link above is showing just the display of CON data but if you follow other links in the left column you will discover additional information about the IBS (Integrated Bridge System) and other control systems.

The reason I changed to conning instead of control is because it just sounds so much more a comfortable nautical term and as I stated, there is precedence. HA!

Another Baby Step

It has been a great weekend. The weather in Texas finally broke this morning (Labor Day 2011) as it was 68 degrees on my back porch this morning. The wind had been blowing hard all day before and the night before so I knew something was changing.

At 7:30 AM I sat on the porch in my “got dressed” shorts, sippin’ a cup of fresh ground French Roast coffee, munching on my last chocolate walnut brownie, and freezing my a** off! I’m not conditioned to under 70 when it’s been 105 to 115 for several months straight. Never the less, it was a great day to work in the shop.

The picture shows the BS2 micro computer in the foreground with an LED, a photo transistor, a piezo speaker (squeaker would describe it better) and a servo motor all hooked up to the I/O pins. That is the Propeller behind it also with some I/O stuff on board. Both systems are capable of communicating both directions on the wireless XBee network.

My theory has been proven to my satisfaction. Now I will begin to design the real world component application so I can test how those components will really work, then do radio range checks before I switch to the prototype boards.

It sure was nice to have a cool day in the shop.

The XBee Meets the Propeller

I got some time this Labor Day weekend (2011) to get an XBee  interfaced with the Propeller processor. The pictures show the tiny interface board required to change the pin spacing from the XBee to fit the spacing on the Prototype Breadboard. This is some more of the micro soldering I have written about before. That’s all this board does is change the pin spacing.

What I can see here is the XBee running in full duplex. That means it can listen and talk at the same time. Just like talking on the telephone. Well, maybe I can’t do that but the telephone does it very well.  🙂  That’s a pretty big deal in the world of communication and has certainly removed some concern from me determining if this system will work fast enough for good control. I think that is not an issue at all now that I can use the Propeller.

Dedicating one of the cogs (processors) in the Propeller to just manage the communications means I can do whatever else necessary with the other cogs and not slow down the two way communications with the shore unit.

HB-25 Motor Controllers

As you can see I have two of the Parallax HB-25 Dc motor controllers now on my workbench. They are rated at 6 to 16 volts (DC) at 25 amps. That should be rugged enough. I figure I only need one for testing but I would like to run twin screws on the demo boat.

The controller is just over 1 ½ inches square and about the same in height. That makes them very small for the power they can handle.  What makes them so high capacity is the attached micro cooling fan under the component board. There is a machined heat sink between the fan and the controller chip. The heat sink is drilled with holes like Swiss cheese.

When I first saw these controllers probably a few years ago, my first thought was these were perfect for electric motor control on a model boat; actually large electric motors on a large model boat. Now I get to test my initial premise.

Electrics and water always has me concerned. It is very possible the boat may be operated in times of light rain. So one of my challenges is how to mount and protect these controllers from moisture. If it was easy, anyone could do it. Other than a complete sinking, it’s a matter of splash control.

Then I just need a hull that is unsinkable (Titanic?)

Trials will of course be run in calm waters but who knows what thrills may lay ahead when confidence and reliability allow the operating envelope to be expanded. Maybe build the first model icebreaker with a balsa wood hull.  Uh… no, that can wait.