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  • #16
    Re: Battery

    When it comes to disc motors, your first choice is brushed or brushless motors. Brushless motors are really proving their worth now but brushless-powered spinners tend to fall into the 'bloody hell that's insane!' category and are considered the higher end of the power scale. If you want something that will still do damage but is cheaper than a brushless setup, there are two main options that have proven to be decent.

    The first is to go for a Speed 900 electric motor (or two) to power your disc. Drumroll/Boner, Savage Evo and Inertia XL have all had success using them. They're relatively cheap (just under £40) and can be powered either by a speed controller or relay.
    I bought my most recent one from Cornwall Model Boats, and it made it from Cornwall to Scotland in less than 24 hours!

    http://www.cornwallmodelboats.co.uk/aca ... _6373.html

    There are a couple of other sites that stock these but they're all around the same price mark.

    Alternatively, get yourself down to your local car breaker's yard and hunt out a car fan motor. Ford Mondeos seem to be the popular choice. These motors are similar to the EV Warrior that used to be available, and they're capable of performing around the 1hp mark. Better yet, you can usually get them for £5-£10. Dragonstrike is the best example of how effective those motors can be.

    I'll get some video links that show the performance of the two.

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    • #17
      Re: Battery

      Yes please on the links, I will look into the suggested motor options

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      • #18
        Re: Battery

        One Speed 900 at 19.2V:

        http://www.youtube.com/watch?v=r7B9vKIJ5nU

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        • #19
          Re: Battery

          Thanks for that, not much in it. Which motors are lighter ? I'm now really looking forward to getting started. I will start purchasing all the bits next week

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          • #20
            Re: Battery

            the the fan motors dule direction? i may upgrade my drive for them

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            • #21
              Re: Battery

              The Speed 900s are lighter

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              • #22
                Re: Battery

                Yeah I think the fan motors are 1.2kg? Speed 900s are around 650g although since two of them are the popular option, then there's little weight difference.
                And yeah Matt, to my knowledge they're dual direction.

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                • #23
                  Re: Battery

                  Depending on total power, but currently, brushless motors and controllers are getting idioticaly cheap compared to brushed motors and relais.

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                  • #24
                    Re: Battery

                    Do you have a link to brushless motors that are good

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                    • #25
                      Re: Battery

                      http://www.hobbyking.com/hobbyking/stor ... 55%5F.html

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                      • #26
                        Re: Battery

                        That is a VERY nice spinner motor...... For a heavy....

                        Team RCC has one of these wandering, waitning for a robot to be build around it.

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                        • #27
                          Re: Battery

                          That is a monster thanks

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                          • #28
                            Re: Battery

                            Its the motor Buzzbar (Little Spinner 2) is using for his spinner at the moment, quite heavy though so would take a lot of clever design to be able to use it.

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                            • #29
                              Re: Battery

                              It's not so much the motor that bumps up the cost with brushless spinner setups, but the ESCs (and depending on brand, lipo packs too).
                              I got a nice Scorpion motor for £85 but a quick look into reliable controllers left me looking at a £200 pricetag. Suffice to say that'll have to wait a month or two.

                              Brushed electric spinner setups using Speed 900s or car fan motors are usually reliable and rugged. While brushless setups are becoming much cheaper in general and are possibly comparible in price to a motor/relay setup, to get a brushless setup in a featherweight spinner that is as reliable and rugged as the brushed option, you will have to pay much more. Go for the cheaper option and you might find that you have to replace bits on a more regular basis. Thankfully for the general UK roboteering community, Dave Moulds (360) has gone through a lot of models of motor and ESC, as well as a lot of money, to help determine what brands are better and what are not when it comes to featherweight brushless spinners.

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                              • #30
                                Re: Battery

                                ME?

                                lol... that motor posted above is utter rubbish for the size of it...you'd be much better of going with a smaller more efficient motor such as a scorpion HK4025, it will give more then enough power on 6s lipo than that bigun and weigh a lot less....

                                for example 360 uses a scorpion hk4025-890kv and generates 5000w (more then the advertised spec of the motor) on spin up.... i think LS4 uses the 12s version and that can produce even more power and its only like 5mm longer in size.

                                i originally used dual scorpion hk3026-1400kv motors in 360... and even one of those tiny motors could just about spin up the 5kg blade...

                                Glen in Aus is using a 3026 with a 3kg blade and its won pretty much every competition over there...

                                When using brushless always over rate the motor you need
                                Never over volt it
                                Over rate the esc you need and dont go for rubbish brands
                                If in doubt ask on here if your serious about building something.

                                price.... a decent motor will be around £120, a good esc will be about £150, and a suitable lipo will be around £80 depending on the setup.



                                from what ive seen... its a good idea to not go below a ratio relevent to the weight of your disc on a decent sized motor as a rule of thumb;

                                2kg disc... 2:1 ratio or more
                                3kg disc... 3:1 ratio or more
                                etc

                                examples of brushless discs;
                                http://www.youtube.com/watch?v=9C-FZlWJ4Oc

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