by Dblnaknak
This is a scaled down version of ericthepoolboy's original RX7 design. All credit goes to him for the awesome design. I simply scaled everything to 1/10 scale and modified the design to accommodate the new bearings, gear mesh and hardware. The motor is assembled the same way as the original and you can use his original directions for assembly. You will need to improvise on a few things like the eccentric lobe pins.
This is not an easy build. I thought that it was a little more complicated due to the small size and extremely tight tolerances. Take your time building it. Most mechanical parts will need to be slightly filed, honed, or sanded due to varying printer settings. SLOW your printer down for this project. I could not get any pivot pins to work correctly due to the small size so everything is held together with magnets
The bearings were sourced from either banggood.com or ebay and the screws were sourced from rc4wd.com.
HARDWARE
Bearing sizes (OD x ID x WD):
15x10x4 6700zz - rotors x 2
10x6x3 MR106ZZ - Center shaft x 2, fixed gears x 4,
5x2x2.5 MR52ZZ- turbo x 2, idle gear x 1
Magnet - 2mmx1mm Neodymium
one 2mm rod for turbo
two 1.2 mm rods for pins in eccentric lobes
2mm x 5mm SCHS - oil pan feet, idler gear
1.5mm x 12mm SCHS, BCHS - pulley, flywheel, timing cover, eccentric lobes
1.5mm x 3mm SCHS - turbo
1.5mm x 4mm SCHS - exhaust header
1.5mm x 5mm SCHS - turbo manifold, exhaust lower header
1.5 x 5mm set screw - output shaft, input shaft, idle gear (may have to trim 2mm off)
Motor - make sure you only run 6v to your motor
https://www.banggood.com/DC-6V-200RPM-Mini-Metal-Gear-Motor-With-Gearwheel-p-969275.html
Motor controller
https://www.banggood.com/90W-DC-3V-35V-Motor-PWM-Speed-Controller-Switch-LED-Fan-Dimmer-p-1056903.html
Resolution:
.2
Infill:
15
Notes:
SLOW YOUR PRINTER DOWN
