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About 101 - Rebuild for RWUK Series 4
Following the world championships 101 was in need of more than a lick of paint! Not only does it need a new body shell but also a weapons system update.

The main constraint is weight although all the bodywork is made from alloy; the tracks and guide wheels weigh in at 18 kg. This leaves very little for a weapon system, there is also the constraint of having a weapon that will be effective either way up. The current system use a pair of high-pressure (750psi) 3-port spool valves these where designed and built specifically for this robot (Photo). These are linked to a 30 mm bore double acting ram again built from scratch using hydraulic tube (Photo).

I have decided to stick to the same system but the ram is to be replaced with a new high-speed design. This new cylinder is now the full length of the robot and made of 6mm wall thickness HE30 alloy tube (Photo). The piston is to be made from the same alloy and is to be fitted with "O" ring seals and Teflon guide rings. Hopefully this new weapon will have sufficient impact energy to do some real damage.

I have made a start on lightening the chassis this can be seen in the photo, I need to lose about 2.5- 3kg to allow for the new weapon.

I have had many emails enquiring about the construction of the valves, as mentioned earlier these are of a spool design and as such quite complex. A simpler solution is to use the valves from fire extinguishers fitted into a port block and actuated by a small cylinder running off a low-pressure supply. This is the solution used on Chaos II and seems to work well, but watch this space for drawings of the 101-valve system.

Of course all the covers need to be replaced after the damage taken in the semi finals of the world championships, but these are quite easy to and should not take to long.

This year I am going to try some different motors mainly to save weight, the motors chosen a made By ISKRA and are supplied through Ellis Components. The motors (part number 11.212.100) are rated at 24V 800W and are 1 kg lighter than the Bosch motor but have the slight disadvantage that they are only rated for 2.5 mins at full power. I am hoping that this will not be a problem due to the fact that during a fight a robot is not always working at 100% power and the fact that I am only using NCC 70 controllers that will hit there current limit before the motors start smoking (I hope). For more information see the new Motor Information section.