Super Twin21 Baja
The chassis is based around two vertical plates.  This is similar to the set up used on the Tamiya TXT-1 and HPI Savage, apart from the fact that my plates are half an inch thick.  This is overkill of course, and weight will be reduced by milling most of the material away to leave an I-beam section, with holes drilled in to further lighten it.  The engines are mounted in their pockets which have already been made, CNC-cut using my first ever bit of CNC code!  Unfortunately I do not have any more access to these machines so most of the rest of the work will be done on my own manual gear.
The two chassis plates will support everthing to run the vehicle between them, keeping the CoG very low and the structure super strong and stiff.  To protect the engines and carbs, there will be a plate beneath them attached to the chassis.  I would like to think this will limit the amount of muck that gets thrown onto the engines, but from previous experience I imagine this is wishful thinking.  If its not air-tight, it may as well be completely open.  The plate will also add to the torsional rigidity of the chassis.
Why build it?
Chassis
Trans system
Suspension
Power
Brakes
Add-ons
Making it
CHASSIS
Engine no.1 mounted onto its plate.  The side it is mounted to is heavily milled out to lighten it, that 1/2" lump weighed a lot before that.  The space below the clutch bell is where the main spur gear will mesh (through the chassis).  Notice the heat sink vents under the crankcase.  The two tuned pipes will not be in this location in the final car, they will exit to the rear.  A mirror image of this setup will be placed the other side of the spur gear, to provide the twin-spines of the chassis and the horizontally opposed engine layout.
Front end as of 14 July '04.  The front of the twin-spine chassis has been fitted and most of the front suspension is finished.  Shown with 1 brake caliper mounted up.
Another view, from the front.  She's wide.
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