P300

P300 in action. Speed is app. 30km/h. Photo: Teppo Mäkelä

Roll out 2.6.2012 at Joensuu Finland.

More pics here | Project blog here in Finnish | Project blog translated Finnish to English by Google

NEW: Construction plan in full 1:1 scale - in PDF format.

Construction of the front part

The boom tube is a 40x40-1.5mm thick welded to 30x15-1.5mm "loop" fork parts.

How to bend fork parts.

All fork parts together in welding assembly plywood.

Nose boom welding assembly.

Front part - nose boom to fork pieces welding assembly.

Last joint - front part - pivot/nose boom together in 20 degree bend. Dropouts comes over this joint.

Construction of the rear part

The bottom tube is a 40x40-1.5mm thick welded to 30x15-1.5mm fork parts - in this pic, parts are tighten to plywood plate.

Pivot

Pivot idea illustration (60 degree angle):

1. 12mm bolt 2. Washer (hits only bearings center) 3. Bearing - sealed (12mm inside hole - 32mm outer diameter - 10mm thick) 4. Tube 100mm - 32mm inside diameter 5. Tube 78mm - 32 mm outside diameter tube (hits only bearing outer part) 6. Tube 80mm - supports bolt - a bit longer than tube what makes bearing hole 7. Nylon lock nut

Rear part grab, before welding.

Statistics

	Pivot Angle [°]	Trail [cm]	Seat Height [cm]	BB-Seat Diff. [cm]	Ground Clearance [cm]	Wheelbase [cm]	Weight [kg]	BB-FWA [cm]	BB-EOS [cm]	Turning Circle [m]	Front Tubing [mm]	Wheel Size [inch]	CG [%]
P300	59	-14	35	20	18	108	14	47	75	-	30x15x1.5	20" 20"	-