Tamiya PT-15 Japan MTBPosted by xilsoe Dec 07, 2014 14:21:05
Yesterday I brought the hull of the PT-15 with the updated RC installation to an indoor swimming pool to try it out. I found that the boat ran very well. Not a single radio glitch and not one drop of water inside the hull. Now I believe I can fix the deck in place and end up with a well running boat that shouldn't cause me too much trouble. The only thing to note was that the motors and ESCs were a little hot after the test. Not something I'll worry too much about though.
Tamiya PT-15 Japan MTBPosted by xilsoe Nov 17, 2014 20:20:46
To make access to the battery and electronics easier I have modified the deck of the PT-15. The piece of deck that goes across under the superstructure was removed so it will be easier to access the electronics. To reduce water ingress I have put an edge around the front part of the hole in the deck so the water won't automatically enter the hull. I shot some pictures before painting the edge. I thought that would make the changes more visible in the pictures.
The deck is still not fixed in place. I would like to try out the electronics before dong that. I also need to find a way to keep the superstructure in place so I won't loose it. Loosing the superstructure would be too bad.
Tamiya PT-15 Japan MTBPosted by xilsoe Oct 26, 2014 20:05:34
After getting my new transmitter I have updated the RC installation in the PT-15. Because of the programming options available in the transmitter I can program that and get rid of the Arduino in the boat. Though it was fun programming the Arduino, I believe I am better of without it in the boat. That is because without the Arduino I have less electronics in the boat to generate interference and I have less weight in the boat. Further I have eliminated the risk of having a software error in the Arduino.
I chose to use R7008SB receiver in the boat instead of using an R7003SB because I need 3 channels to control the boat. Using the external voltage telemetry in an R7003SB will take one of the channels.
To reduce weight I also chose to replace the main power cable that connects to the battery. I went from AWG 16 to AWG 18. I don't think I'll be using a lot of Ampere so that shouldn't be an issue.
When testing the RC installation some seals I had glued on top of the shaft housings came off. Instead of gluing them back in place, I decided to get some M2 grub screws to seal the holes. This means that it will be easier to lubricate the shafts if I will need to do that. These small screws can be seen in the pictures below.
Before fixing the deck in place, I intend to do some testing of the boat so I know it works. If there is a problem it will be much easier to fix before the deck comes on.
Here are some pictures of it all. (Antennas not fixed in place yet. I have not decided what to do about those yet.)
Tamiya PT-15 Japan MTBPosted by xilsoe Sep 28, 2014 20:02:47
Because of the problems I have been having with the RC equipment in my TAMIYA PT-15, I decided to get a new transmitter. My choice is a Futaba T14SG. It comes with an R7008SB receiver. I won't need that much channels for the PT-15, so I'll get an R7003SB receiver.
Furthermore the programming options on the new transmitter allows me to remove the Arduino from the boat, which makes everything simpler and gives less electronics and weight in the boat. Furthermore this RC equipment comes with telemetry, so I can use that to monitor the battery in the boat so I know when to come to shore. All good
Generally I like my new transmitter. It seems to be capable of doing everything I want from it. The only thing I don't like is this menu control system. I don't find it intuitive. I don't know where they found the inspiration? Perhaps an iPod? It may work well on an iPod, but that doesn't mean it works well for this advanced menu structure. I would have preferred a 5 way button. I believe they could have done all with that in a more easily understandable way.
I have started re-organizing the electronics in the PT-15. Expect more news on the PT-15 in the not too distant future.
Tamiya PT-15 Japan MTBPosted by xilsoe Nov 19, 2013 09:00:10
I know I haven't been updating this page for some time. This is due to a hard disk crash, where some data had to be restored before I wanted to proceed.
Anyway I have been doing some work on the PT-15. Since last update I have added antennas and decals to the superstructure, added decals to the hull, replaced the broken Arduino with a new Arduino with a new and hopefully improved program.
I have moved the receiver away from the power wires from the battery. Finally I have attempted placing the antennas in better positions. For this I made a vertical antenna that will extend into the superstructure when everything goes together. The vertical antenna can be seen in some of the pictures below.
Right now I would want to test the boat electronics. However I am not going to take the boat to the model boat pond alone as I am afraid it might end up somewhere on the pond. Furthermore I would like to test the boat with other radios in action to see if that is a problem. The outdoor model boating season starts in May 2014 so I don't see a lot of progress coming to this boat before season start.
Tamiya PT-15 Japan MTBPosted by xilsoe Oct 13, 2013 09:27:04
After adding some details to the superstructure of PT-15, I decided to add the control room interior. I didn't glue the control room in place. Instead I glued a small plastic piece in to keep the control room in place. This means that it will be possible to remove the control room interior if that should ever be needed.
Some pictures of the control room interior mounted in the super structure:
Next: More details
Tamiya PT-15 Japan MTBPosted by xilsoe Oct 04, 2013 13:29:54
After joining the superstructure parts I have been adding some details.
Still a few details to add...
Tamiya PT-15 Japan MTBPosted by xilsoe Oct 02, 2013 20:27:20
In contradiction to the construction manual, I have decided to join the two parts of the superstructure. The parts are not really prepared for that, so I made a small modification. The pictures below shows how I did it.
The intention for doing this is to make access to the inside electronics easier and then I believe the boat can be secured better from water ingress in this way. Next will be to add some details to the superstructure.