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

1/48 G7 Torpedos

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

  • #76
    It was weird, they shipped the 5F caps by air today but would not ship the 25F caps by air. Oh well, the design is starting to split paths. I have parts coming to optimize the LiPo version as well as the super cap version. Some latching and non latching double throw reed switches are on their way too. Mainly for the super cap design.

    In all of this, I still need to focus now on designing optimized scale counter rotating prop designs. To date I’ve been using modified props off a hoard of 1/125 type VII revell u-boat kits left over from 20 plus years ago when I converted one of those to RC.

    To make design matters even more challenging to navigate, I’ve been playing around with the idea of running twin 4mm counter rotating motors each driving their own shaft and using a small custom designed pc and some code to sense torp body roll and compensate with adjusted individual motor Rpm’s control to correct body roll. Wouldn’t take too much to do. I would think you could almost steer the thing by manipulating the prop thrust

    Comment


    • #77
      Originally posted by Monahan Steam Models View Post
      To make design matters even more challenging to navigate, I’ve been playing around with the idea of running twin 4mm counter rotating motors each driving their own shaft and using a small custom designed pc and some code to sense torp body roll and compensate with adjusted individual motor Rpm’s control to correct body roll. Wouldn’t take too much to do. I would think you could almost steer the thing by manipulating the prop thrust
      That is insane, anxiously waiting for this!

      Comment


      • #78
        Not too insane when you boil it down to the basics. Let’s look at it mechanically for a sec. Can you fit two 4mm motors side by side in a 10mm space. Yes you can. Can you provide the proper distance from each motor shaft centerline to prop shaft centerline in a 10mm circle foot print. Yes I think so with the right gearing. It’s much easier to have control with two variables in real time then only one where you have to get the mechanical dynamics balanced out just right. Im taping this out on a smart phone which has micro accelerometers sensing the exact position of the phone. Think about that for a moment, fairly small light weight components right? Micro RC airplanes, helicopters and drones with gyro stabilization hardware use similar micro sized chips. I think it’s achievable with some r&d work.
        Last edited by Monahan Steam Models; 08-01-2020, 10:39 AM.

        Comment


        • #79
          Currently waiting for new bits and pieces to arrive for the next rounds of torpedo designs and testing. In the meanwhile here’s a video of a marine steam engine I built from scratch a few months ago being test run on compressed air before being sent out to it new home. Every single part on it is machined and made from scratch. I used to manufacture these in my shop along with the boilers and other bit more than a couple decades ago and hundreds of these are around the world today. I stopped making them back in 2010 to focus on design and machine work for the labs and the private sector but they’re still fun to play around with every once and a while.

          https://youtu.be/2wnT55L4wkg

          Comment

          Working...
          X