H&R Slot Car Radio Control Conversion Kit

H&R Slot Car Radio Control Conversion Kit

thingiverse

I've always liked mini and micro RC cars. The problem is that they usually have a... Well, sane amount of power and speed. I wanted more. I wanted insane. So I thought: RC cars this size never run more than a 2 cell Lipo battery, or 8.4 volts at their peak. Then I looked at some old slot cars I had. Slot cars run 12 volts. What if there was a way to convert a quality slot car chassis to RC in an easy, reversible way? I looked around and found that it hasn't really been done. So I bought an adjustable slot car chassis and started designing, and this is what I came up with. This here is a conversion kit to convert an H&R Adjustable slot car chassis to RC, in an easily reversible manner. 4 3D printed parts make up a new front subframe that replaces the guide and solid front axle with steering spindles and a servo mount for a nano servo. Non-printed parts required include: H&R Racing Adjustable Slot Car 3mm axle 3mm set screw axle collars 2 M2x5mm screws Nano servo Brushed ESC 2s/3s Lithium battery Radio system To assemble the front axle, you press the 3mm axles into the 3d printed spindle, install the front wheels without a set screw and then install a set screw collar along with the axle spacers included in the kit. Assemble the 3D printed parts along with a nano servo with two M2x5mm screws and make a steering linkage from a piece of wire. I used a paper clip. Install the front subframe onto the main frame of the slot car and install your electronics. I would recommend a 5V external BEC from the ESC to the receiver because a 6V internal BEC will overheat the nano servo. Battery mount is still not fully figured out. I currently have mine taped to the top of the motor. Links to parts I used: Ultra-nano Servo - $12.59 - Pair - Requires 5V BEC, will overheat at 6V https://www.amazon.com/gp/product/B09SGZ6Z7F/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 ESC(Full Power, 3S Lipo) - $18.99 - Pair - Internal 6V BEC, requires external 5V BEC https://www.amazon.com/gp/product/B0B7JD22TL/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 5V External BEC - $7.98 - Required for ESC with >5V Internal BEC - Need to solder between ESC and receiver https://www.amazon.com/ShareGoo-Converter-Module-Quadcopter-Holder/dp/B075QJDW3Q/ref=sr_1_13?crid=18DD9DWZFW2VY&keywords=5v+bec&qid=1673828626&sprefix=5v+bec%2Caps%2C92&sr=8-13 3S Lipo Battery - $14.99 https://www.amazon.com/gp/product/B09V9MFMZQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Chassis: H&R Racing Adjustable Wheelbase Slot Car Chassis - $50.90 - Choice of tires and motor https://www.ebay.com/str/midamericaracewayandhobbies - Seller eBay store - Many options for HRCH models https://www.ebay.com/itm/372395919202?hash=item56b486c762:g:oCMAAOSwT4lWROgb - Version my build is based on - Fish Rubber rear/Foam front tires - 40K RPM Motor Hardware: 3mm Axle 2x 3mm Locking collars - https://www.amazon.com/gp/product/B01EA912P8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 4x M2*5mm Hex Screws - https://www.amazon.com/uxcell-M2x5mm-Thread-Stainless-Socket/dp/B06XW8MMQW/ref=sr_1_4?keywords=m2x5mm+screws&qid=1673828509&sr=8-4 thin steel wire(can use a paper clip) I would highly recommend PETG for this build for added durability with thin parts but PLA may work.

Download Model from thingiverse

With this file you will be able to print H&R Slot Car Radio Control Conversion Kit with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on H&R Slot Car Radio Control Conversion Kit.