Hi Trev,

I used the wheelchair motors over wiper motors for their durability and shaft size.
these motors are a lot more robust and were designed for heavy going.
after another short run today I noticed that the travel speed is not really slowing whilst climbing.
As mentioned earlier I will attempt to take some current measurements on the weekend and hopefully get to the bottom of this.

Hi Norm,
the side walls have been cut off the motocross tires to gdt them to flex over the drive wheels. There is quite a bit of tension on the system however, it moves freely and I can easily turn it by hand.

I think i will install a fully charged automotive battery on the weekend , disconnect the drive belt to the alternator and head for the slope to find out whats going on. This should separate the good from the bad