The world's leading magazine for all model boating interests

Subscribe
The Modelling Hub Logo

The world's leading magazine for all model boating interests

Subscribe
Buy Latest Issue

Forums

Help

Register

Log in

Battery Change

Advert
New Replies
Report Bug
Help/FAQs

Battery Change

Home › Forums › R/C & Accessories › Battery Change

  • This topic is empty.
Viewing 7 posts - 1 through 7 (of 7 total)
  • Author
    Posts
  • 28 December 2015 at 15:57 #62333
    Tim Cooper
    Participant
      @timcooper90034

      I have 2 Robbe Navy Kompact geared motors in my approx 15 year old Robbe Dusseldorf model. I am thinking of rewiring and simplifying (hopefully) some of the internal spaghetti and at the same time replacing the ageing lead acid batteries with NiMh. The present batteries are 6v and the motors drive 45mm brass props.

      Has anyone any advice on using the motors with a higher voltage i.e. 7.2 or 8.4v? The speed controllers are Electronize 43 HVR and a 43 HX. I think these were rated at 15 amp continuous, so I assume they would be ok for a higher voltage battery.

      Thanks

      Tim Cooper

      28 December 2015 at 15:57 #5396
      Tim Cooper
      Participant
        @timcooper90034
        28 December 2015 at 17:09 #62334
        Dave Milbourn
        Participant
          @davemilbourn48782

          Tim

          The Robbe motors are rated 6-9.6v so you should be fine with 6 or 7 NiMH cells. Similarly the Electronize ESCs were always rated to at least 12v so your proposed rewire should be fine, and I can't see the motors drawing anything like 15A on load. I would suggest cleaning and lubricating the gearboxes and motor bearings if they are that old.

          Go for it.

          Dave M

          28 December 2015 at 18:58 #62340
          Tim Cooper
          Participant
            @timcooper90034

            Dave

            Thanks for the response. I have cleaned and lubricated the gear boxes several times but was thinking of doing them and the shafts whilst it was on the bench.

            Thanks

            Tim

            28 December 2015 at 23:13 #62342
            Dave Milbourn
            Participant
              @davemilbourn48782

              As my 13 year-old grandson might say – "Yeah – whatever…"

              DM

              29 December 2015 at 08:41 #62344
              Dave Milbourn
              Participant
                @davemilbourn48782

                I've just read my last comment again and realised it looks a bit abrupt (i.e. just like a real teenager…). I really meant to say that Tim's proposed actions are an excellent idea, wherever and whenever they are carried out.
                Sorry for any confusion.

                Dave M

                29 December 2015 at 15:29 #62347
                Tim Cooper
                Participant
                  @timcooper90034

                  Dave

                  No offence taken. With 3 sons in their 30's, 3 grandsons and 2 granddaughters under 10 I'm just grateful of advice I can understand.

                  Thanks for the prompt response.

                  Tim

                • Author
                  Posts
                Viewing 7 posts - 1 through 7 (of 7 total)
                • Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

                Latest Replies
                Report Bug
                Code of Conduct
                Help & FAQs

                Code of conduct | Forum Help/FAQs

                Advert

                Latest Replies

                Home › Forums › R/C & Accessories › Topics

                Viewing 25 topics - 1 through 25 (of 25 total)
                Viewing 25 topics - 1 through 25 (of 25 total)

                View full reply list.

                Advert

                Latest Issue

                Subscribe
                Buy Latest Issue

                Newsletter Sign-up

                Latest Replies