Building of a the Chassis.

The start of a flat chassis.

The main rails are made from 1/16" square box section brass, cut 5/16" shorter then 4 inch's so that when the bumpers are added the car is just less then 4 inch's. A space of 25mm between the two main rails.

The bumpers again 1/16" square box section brass with 2 soldered together and maybe three for front bumper. Bumpers must be longer not 2" and shorter then 2 1/4".

The strengthening of a flat chassis.

All the strengthening is 1/16" square box section brass, for the back bumper and cross section at the front of the chassis. Except for the one behind the front bumper which is a piece of .064" by 1/4" brass strip.

Starting of the roll cage.

Cut a strip of .005" brass sheet 12mm by 100mm long and fold over 2mm along the 100mm length so not to have a sharp edge. Measure to half distance then measure 13mm either side and fold though 90 degrees and solder it the chassis.  

Roll cage.

Not a standard cage on this car, but two pieces of copper wire bend to shape and 24mm from table top to top of cage to it pass minimum height rule, then copper wire solder between front and back roll cage so that the roof plate can be solder to it. Roof plate made of .005" brass sheet.

Now see the motor sledge part of the building:-

Joining the two half's.

Lay the motor sledge flat on a piece of wood then place the flat chassis on top of the motor sledge so it sits on the back axle and the guide blade then solder together with the piece of 1/16" square box section brass that was put on the motor sledge last.

Joining the two half's.

Here the front of the to half's are joined together with 1/16" square box section brass going from the motor sledge hinge to just behind the front bumper strengtheners. 

Joining the two half's.

Then repeat the above two steps for the inside of the car, but for the front connection put in abit further back so it does not get in the way of the fount wheel mountings. For the back connection first put back wheel than fix the connection so it does not get in the way of wheel and tyre.

Nerf bars.

Nerf bar can be to any design the only thing I would say is to have a connection from the nerf bar to the bottom rail of the chassis to add strength.

Bonnet.

Is made out of .005 brass sheet and to any design you like. Next put the rear tyres on ready for the connecting the front wheels.

Now see the front wheels part of the building:-

Front wheels.

Put car onto a piece of wood so the guide blade is sat in a groove like on the track. then solder the copper wire that put though the 3/32" brass tube on to the 1/16" square box section brass that on the front of the motor sledge making sure that the front wheel it touching the wood and is inside of the width restriction. Repeat for the other side, then secure the top of the copper wire with more 1/16" square box section brass back onto the front of the motor sledge. Put the steering arm in place and bend the two pieces copper to it, cut one short under the steering and solder together the other copper wire bend up to go thought the arm.

Finally.

With some 1/16" square box section brass you can finish of the front bumper with the fence catcher and then returning to the flat chassis.  

Also.

I glue in some expended aluminium in at the front of the roll cage just to finish it off.

Next the finished car.

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