Announcement

Collapse

Forum rules and expectations

Hello, and welcome to the forums at the Nautilus Drydocks, formerly Sub-driver.com!

We welcome anyone with a passion for submarines and a desire to learn and share knowledge about this fascinating hobby. Use of these forums indicates your intention to abide by our code of conduct:


1. No spam. All automated messages, advertisements, and links to competitor websites will be deleted immediately.

2. Please post in relevant sub-forums only. Messages posted in the wrong topic area will be removed and placed in the correct sub-forum by moderators.

3. Respect other users. No flaming or abusing fellow forum members. Users who continue to post inflammatory, abusive comments will be deleted from the forum after or without a warning.

4. No threats or harassment of other users will be tolerated. Any instance of threatening or harassing behavior is grounds for deletion from the forums.

5. No profanity or pornography is allowed. Posts containing adult material will be deleted.

6. No re-posting of copyrighted materials or other illegal content is allowed. Any posts containing illegal content or copyrighted materials will be deleted.
See more
See less

Moebius Skipjack

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Plenty of waterproof ESC's with 3amp output. Brushed and brushless.

    https://www.amazon.com/ESC-Boat/s?k=ESC+for+Boat

    Comment



    • New diagram/layout....
      Click image for larger version Name:	Skipjack diagram.jpg Views:	0 Size:	83.6 KB ID:	146954[/QUOTE]

      Ken, I'm missing something. I see you have a BEC from the battery going into the receiver for power. Don't all modern ESC's have a built in BEC? I just plug my ESC into channel 3 on my targets receiver. Is this just extra protection or a power issue? Forgive my ignorance.
      Casey
      Last edited by Das Boot; 05-17-2021, 12:08 AM.

      Comment


      • https://m.youtube.com/watch?v=qrXxNlTTYKI

        this video outlines what a BEC is and why a lot of people like them versus using the built-in BEC in many speed controllers.

        Bob

        Comment


        • Casey, Bob covers everything as to why using one in the video. The ESC I am using has an output of 1.2 amps. In my testing, with as many things working, running that I could, I measured 0.5 - 0.7 amps drawn from the BEC. So adding a BEC with an output of 3 amps ensures I wouldn't be overtaxing the ESC BEC.

          But, in my setup, the ESC-motor is getting noise from the two BEC's that I tried so far. According to Mtroniks I need to use a opto-isolater that they sell. Can't find it in the US and it's costly to ship it across the pond. This week I'll be trying to add additional caps to the motor to see if the problem clears up. If that doesn't work then may go back to the ESC BEC and not use a dedicated BEC. Or will have to go for another ESC.

          Comment


          • Ken just for s's and g's... Try disconnecting the black wire to your ESC from the radio also.. and just leave the signal wire connected you could be getting something trying to find a ground/back feed through the m-tronics ESC... The ESC and radio already have power and ground without that black wire... So they should not need it anyway-just a thought-BG
            Last edited by Bob Gato; 05-17-2021, 04:30 PM.

            Comment


            • Good thought Bob. Tried your suggestion, it was actually worse.

              Made a video to show everyone the problem. The stuttering may not be a big deal, I don't like it. I may just not use a BEC and stick to the ESC BEC. As you can see at the end of the video, the current draw is 230ma which the ESC BEC can handle.

              Last edited by Ken_NJ; 05-19-2021, 02:38 PM.

              Comment


              • LOL Sorry man!!

                Great video-tells all! If you are still on the hunt for a UBEC, I wonder if you could use a buck converter-I use them for accessories-they'll take up to 40 volts and hold it at your setting at least 1.3 volts below the input voltage regardless of changes in input voltage-they are quite cheap...and small. I've bought them for as low as 10 units for $7...dial in the voltage and it just stays and it doesn't waste power as heat. These are 3amps at $4 each-but if you shop around you can do better . https://www.amazon.com/LM2596-Conver...a-754523673785


                Click image for larger version  Name:	614cOQRcjqL._AC_SL1000_.jpg Views:	0 Size:	72.6 KB ID:	149962
                Last edited by Bob Gato; 05-18-2021, 07:08 AM.

                Comment


                • Originally posted by SubHuman View Post
                  https://m.youtube.com/watch?v=qrXxNlTTYKI

                  this video outlines what a BEC is and why a lot of people like them versus using the built-in BEC in many speed controllers.

                  Bob
                  Well hell, that may be why I've burned up 2 ESC's in that fishing boat. That's probably the only one of your video's I haven't watched.
                  Last edited by Das Boot; 05-17-2021, 08:09 PM.

                  Comment


                  • Casey-this might help- I use it on my Mark V and I can access 10 amps combined from both ESCs at the same time. I came up with this a few years back-it also keeps my radio running if one side fuse blows. https://www.rcgroups.com/forums/show...-Diodes-anyone

                    Comment


                    • Thanks, Bob. What I don't get is I was using a 15 amp ESC then a 40. Both would work, get hot, stop and work again. I imagine it's the thermal SCRAM, but I don't know why. I never ran it full bore. Read your post. I've used diodes countless times to incur voltage drops in ham radio gear, especially the old Heathkit stuff. That's all we used until the surface mount stuff came out.
                      Last edited by Das Boot; 05-17-2021, 09:45 PM.

                      Comment


                      • Man I am sorry-when you said you " burnt up two ESCs" my head jumped to twin motors-the diodes wouldn't come into play on a single-it really sounds like it might be a "big Prop" mismatch with the motor or very long leads from the battery to the ESC.(Ron van Sommeren from over in RCG has done a lot of writing on the water hammer type effect of long supply leads and the slow death of model ESCs)
                        https://www.rcgroups.com/forums/show...ns-workarounds
                        Please feel free to PM me if you want as not to hijack Ken's thread.
                        Last edited by Bob Gato; 05-18-2021, 08:10 AM.

                        Comment


                        • Originally posted by Bob Gato View Post
                          Great video-tells all! If you are still on the hunt for a UBEC, I wonder if you could use a buck converter-I use them for accessories]
                          Yea thought about those, they have some micro or mini ones. Just wondering how many different things I'd have to buy before I find the one that works, and how many of them will end up in my 'spare parts box'

                          https://www.amazon.com/s?k=micro+buc...ref=nb_sb_noss

                          Comment


                          • Probably just one thing -a new ESC but if you want to try a buck converter, PM me your address-I'll mail you one

                            Comment


                            • Thanks Bob. Was playing around with things this morning. Might have a fix. Will get back later about it.

                              Comment

                              Working...
                              X