Re: Mega city
- View SourceHi and thank you for your reply.
Are the controllers easy to get hold of? What sort of cost please?
What sort of speed can they obtain after this modification?
Why are they limited in the first place?
--- In aixamandmicrocar@..., kubotakiddy <no_reply@...> wrote:
> The only way to increase speed on the Mega city is to access the Curtis 1244 contoller unit settings using a handheld diagnostic tool. Once into the parameter listings you need to increase the MAX SPEED Setting on 'setting2' from 60 upto 100, then reduce the Minimum field setting down from 8.5 in 0.5 increments as low as possible before you start experiancing judder from the motor when you pull away rapidly, the speed you eventually end up with is the maximum achievable speed.
> As a side issue, the judder that develops as the minimum field setting is reduced can to some degree be 'flattened out' by removing the back plate of the motor loosening the three allen keys that secure the brush carrier assembly and moving the plate in a clockwise direction forward 5.0 mm, this overcomes the problem of double contact of the brushes on the commutater and will reduce the judder at low take off speeds uphill where heavy current is required.
- View SourceHi Happy
You can buy the diagnostic software from Curtis for the 1244 model which loads onto your computer then buy the connection lead for an all up price of around £80.
The most you can realistically expect to get out of a Meg City is 45MPH, but that assumes a really good set of batteries and a drastically reduced range of about 18miles, this of course will drop off as the batteries deteriorate over time.
If you want to know the condition of your battery pack as it is at the moment you need to take the vehicle into a dealer for a diagnostic check using Aixam-Mega's own test equipment, not for resale to the general public but a good bit of kit.
The reason the speed is limited is very simple, it's a trade off between the optimal speed available in order to provide the maximum range, the higher the speed the greater the current demand from the battery pack you just empty the `fuel tank' quicker if you go faster because it takes more energy to run than to walk!