|||
Current Website Support
57
Contributors
19
Subscribers
You are Not Registered
Subscribe for your gold medal ๐Ÿ…
Ads
Ad Free
Until Cancelled
ยฃ1
ยฃ2
ยฃ3
ยฃ5
Donate for your silver medal ๐Ÿ…
Ads
Ad Free
12 Months
ยฃ10
ยฃ15
ยฃ25
ยฃ50
You Will Be Helping Towards:

  • Domain Fees
  • Security Certificates
  • iOS & Android App Fees
  • Website Hosting
  • Fast Servers
  • Data Backups
  • Upkeep & Maintenance
  • Administration Costs

    Without your support the website wouldn't be what it is today.

    Please consider donating towards these fees to help keep us afloat.

    Read more

    All donations are securely managed through PayPal. Amounts donated are not published online.

    Many thanks for your kind support
  • Join Us On Social Media!
    Download The App!
    Model Boats Website
    Model Boats Website
    Home
    Forum
    Build Blogs
    Media Gallery
    Boat Clubs & Lakes
    Events
    Boat Harbour
    How-To Articles
    Plans & Docs
    Useful Links
    2

















    Followers
    SILICONE TUBE COUPLING
    by Rowen ๐Ÿ‡จ๐Ÿ‡ฆ ( Commander)
    ๐Ÿ“ฃ










    Click To
    Follow
    7 Posts 6 Replies 6 Photos 20 Likes
    ( Newest Posts Shown First )
    jbkiwi
    Fleet Admiral
    ๐Ÿ“ SILICONE TUBE COUPLING
    Flag
    Country: ๐Ÿ‡ณ๐Ÿ‡ฟ New Zealand
    Online: 10 hours ago
    ๐Ÿ˜Š View Profile
    ๐Ÿ’ฌ Send PM
    Hi Rowen, have just ordered some thick walled silicone tube to try - 3mm ID x 7mm OD, for fitting straight on the shafts-(3 and 4mm) and some 6mm ID x 11mm OD for trying with the adapter idea. Might be here in a month or so if I'm lucky (or if at all)

    JB
    3
    Rowen
    Commander
    ๐Ÿ“ SILICONE TUBE COUPLING
    Flag
    Country: ๐Ÿ‡จ๐Ÿ‡ฆ Canada
    Online: 2 hours ago
    ๐Ÿ˜Š View Profile
    ๐Ÿ’ฌ Send PM
    Thanks JB, our winters can be long. If you come up with a better installation please drop me a note.
    Unlikely to make much progress until the beginning of the year as have two other projects would like to finish first
    Rowen
    3
    jbkiwi
    Fleet Admiral
    ๐Ÿ“ SILICONE TUBE COUPLING
    Flag
    Country: ๐Ÿ‡ณ๐Ÿ‡ฟ New Zealand
    Online: 10 hours ago
    ๐Ÿ˜Š View Profile
    ๐Ÿ’ฌ Send PM
    Hi Rowen, I'll be interested to see how you get on. I might have managed an improved system by then.

    JB
    2
    Rowen
    Commander
    ๐Ÿ“ SILICONE TUBE COUPLING
    Flag
    Country: ๐Ÿ‡จ๐Ÿ‡ฆ Canada
    Online: 2 hours ago
    ๐Ÿ˜Š View Profile
    ๐Ÿ’ฌ Send PM
    Thanks Dave and Jbkiwi.
    Much food for thought, but am now confident enought to continue.
    The sailing season is all but over in Canada. Will upgrade a couple of models over the winter to silicone tubing.
    Will report back next Spring with results.
    Rowen
    3
    dave976
    Midshipman
    ๐Ÿ“ SILICONE TUBE COUPLING
    Flag
    Country: ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
    Online: 9 hours ago
    ๐Ÿ˜Š View Profile
    ๐Ÿ’ฌ Send PM
    Hi Rowen
    Small low powered models work fine with silicon fuel tubing as the power and revs involved are normally low.
    As jbkiwi says he intends to use his lathe to make a more substantial fitting for small spaces.
    On a more powerful planing type craft the revs and power will be much greater and more substantial silicon exhaust type tubing works better. Space will not normally be a problem. This does have a larger internal diameter so you do need a bush on both the prop and motor.

    If you have access to a lathe then these can be turned from brass and grub screws fitted to lock. You may need to put a pin thro the silicon and bush if friction does not prove sufficient. Huco coupling brass inserts may also be used and as they are splined work well to grip the tube.

    I have used both types with success, but would not personally use silicon with any brushless motor as they produce a great deal of power and need good a good solid mounting and drive train. Any problem with either and you are likely to see magic smoke or worse and there will be little or no warning, as I well know.
    regards
    dave
    2
    jbkiwi
    Fleet Admiral
    ๐Ÿ“ SILICONE TUBE COUPLING
    Flag
    Country: ๐Ÿ‡ณ๐Ÿ‡ฟ New Zealand
    Online: 10 hours ago
    ๐Ÿ˜Š View Profile
    ๐Ÿ’ฌ Send PM
    Hi Rowen, I've used silicone tubing for years on all my models as it's flexible, quiet and cheap. 4mm is a good size to fit the rc aircraft fuel tubing on, and as long as both shafts are cleaned of any oil, they will stick really well. They also have the advantage of breaking loose under too big a load, (such as a weed pick-up and stall situation) if your motor is strong enough.

    For anything reasonably powerful, you can fit a firm plastic tube which just fits over the silicone, and force the silicone onto the shafts. My Hartley jet boat can pull 30A with a 3000kv 45D brushless inrunner on 3s, and it seems to handle it ok. On brushed motors or brushless inrunners, you will need to make a 'stopper' at the motor end to stop the tube migrating up to the front bearing, (see my vintage runabout post on this).

    Now that I have the lathe, I will be working on a better system for utilising silicone tube, especially in confined spaces, as most of the couplings of this nature (I think CMB sell a few of this style with a captive silicone or rubber insert) are too long for a lot of tight spaces (not to mention expensive.

    JB
    3
    Rowen
    Commander
    ๐Ÿ“ SILICONE TUBE COUPLING
    Flag
    Country: ๐Ÿ‡จ๐Ÿ‡ฆ Canada
    Online: 2 hours ago
    ๐Ÿ˜Š View Profile
    ๐Ÿ’ฌ Send PM
    Due to the size, used silicone tubing as the propellor shaft coupling on my HMS Scimitar model. Have been very pleased with the quiet and smooth running.
    The couplings still look like new after a couple of hours running. The shaft size is 2mm, the motor is similar.

    This experience has been encouraging, am now thinking of removing the exisiting steel universal couplings on a larger model.
    This model has twin 30mm screws, 1000kv motors, runs on 3s batteries with shaft sizes of 4mm.

    Has anybody any experience of a similar layout and what would be your thoughts?
    Thanks
    Rowen
    4



    About This Website
    Terms of Service
    Privacy Policy
    Cookies used in this website are gluten free, wheat free and dairy free. By using this website you agree to our use of cookies. More Info