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Step 3Assemble Front Wheel Platform
This racer will be about 2 foot long. It will consist of a front freewheel platform and a back drive platform.
A rear mounted engine (ahem... circular saw) is one approach which puts most of the weight of the racer over the drive wheel (ahem... blade) for maximum friction.
With that goal in mind we're going to construct the front freewheel platform first.
Cut Two Cross Pieces to About 11.25 inches.
The track dimensions for the Seattle race is 12 inches from rail to rail. I like to have a little over a 1/4 inch clearance on each side to prevent the racing machine from wedging itself.
Align wheel units
This step is best done with the whole platform upside down
Don't add too many screws until you've tested for track fit!
You can mock up a track by placing two 2x4s in parallel 1 foot apart.
Add s'more screws so it'll keep shape!
A rear mounted engine (ahem... circular saw) is one approach which puts most of the weight of the racer over the drive wheel (ahem... blade) for maximum friction.
With that goal in mind we're going to construct the front freewheel platform first.
Cut Two Cross Pieces to About 11.25 inches.
The track dimensions for the Seattle race is 12 inches from rail to rail. I like to have a little over a 1/4 inch clearance on each side to prevent the racing machine from wedging itself.
Align wheel units
This step is best done with the whole platform upside down
- Measure front width between wheel units
- Measure back width between wheel units
- Adjust and repeat until wheels are in parallel
Don't add too many screws until you've tested for track fit!
- Using a few screws attach, doing your best not to misalign the pieces.
You can mock up a track by placing two 2x4s in parallel 1 foot apart.
- Place in track
- Inspect from all angles for binding
- Roll back and forth
Add s'more screws so it'll keep shape!
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