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Club 500 Micro Magic

1)  All standard kit parts must be used and the boat constructed as per the instructions provided.

2)  The motor, rudder, shaft, propeller and coupling supplied with the kit must be used. It is not

     permitted to use ‘hot’ motors, or to modify the motor provided in any way, or use different

     propellers.  Only the following modifications are allowed :-

     a) Cells may be placed on the hull floor in any configuration in order to improve centre of gravity.

     b)  Transom and hull sides may be sharpened by adding filler and sanding down to aid stability.

     c) Sanding down the bottom of the hull to ensure it is straight may be done and filler used if          necessary to even out bumps.  

3)  Either a micro-switch or electronic speed controller  (ESC) can be used for throttle control.

4)  Any Nickel Metal Hydride 6 cell pack (7.2 volts) may be used. Any type of battery connector may

      be used. 2 cell Li-Po batteries may be used.  (See below for advice on Lipo batteries)

5)   Buoyancy aids such as foam my be used inside the boat and/r cabin roof. This is advised.

6)   Modifications can be made to the existing motor mount if an improved motor fixing method is


7)   No additional modifications may be mad below the water line.

8)   Race number board should be attached to the flat section of the cabin side for racing.

9)   A self-adhesive foam strip of at least 3 mm thick must be attached to the bow of the boat.

10) A safety loop (to interrupt the positive power supply) may be fixed to the hull at the stern and

       is in fact recommended for safety and ease of use.

11) Boats may be scrutinised at any time by the Race Controller to ensure adherence to the above


  Amended 16th February 2017  

CLUB 500 Changes for 2017

At this year’s AGM the use of Lipo batteries in Club 500 was voted in. If competitors want to carry on using Nimh batteries then this is OK.

There are however several advantages with Lipo batteries. The reduced weight allows the boat to run a little faster but the main advantage is that the control and handling is much more predictable. Also Lipo’s hold their charge so will be no need to top up the cells just before the next race.

There are a few things to take into account. Only 2 cell Lipos will be permitted which is equivalent to 7.4 volts. For safety reasons charging must be done using a Lipo balancing charger with balancing lead. The cells packs have a C rating which determines the current limit for charging and discharging. For example a pack with a C rating of 25 and capacity of 3000 m/amps can deliver 25 x 3 = 75 amps. If the limit is exceeded then the pack will warm up and can expand which damages the pack. The power drain in a Club 500 is fairly modest so a pack with a rating of 20/25 or above should be fine. The other consideration is the back dimensions and the capacity in m/amps. A typical Club 500 in one five-minute heat will use up about 2000 m/amps. It is important not to over discharge or lower the voltage too much because it will not be possible to charge back up. When choosing the capacity you want enough safety margin but not too much as the weight and cost will go up. I have been running a 3300 m/amp pack with a C rating of 25 and that seems fine. I have looked on the Overlander web site and they do their own range of Sport (25C), Super Sport (30C) and Super Sport Pro (35C) battery packs.

The standard motor will remain the same, with no changes and also you should be able to continue using the same speed controller, so only batteries and chargers change if you want to go down the Lipo route.     

Thanks to Martin Cusick for this information

Another good shop for batteries etc is Component Shop  (www.component-shop.co.uk)                                                                     accessable from the link on the Home page


Amended 10th February  2016

Standard Boat Specification