Elec­tron­ics Up­grade

RC Car Action - - PROJECT -

The stock elec­tron­ics in my RTR bomber did a great job of get­ting the truck around, but there are no ad­just­ments avail­able to fine-tune how it per­forms. I ended up swap­ping out all of the elec­tron­ics with higher-end stuff to im­prove per­for­mance, tun­ablity, and dura­bil­ity. A Tekin RX8 speed con­trol re­placed the stock unit and can be fully tuned by us­ing the mode but­ton on the top or by con­nect­ing it to my com­puter through Tekin’s Hotwire pro­gram­ming de­vice. I mounted it as low as pos­si­ble in the chas­sis on a cus­tom-made car­bon-fiber plate mount. The RX8 is con­nected to a Tekin ROC 412, which pro­vides the speed of a 35-turn mo­tor but the torque of a 55-turn mo­tor. The Van­quish alu­minum wheels that I in­stalled added some ex­tra weight that would be hard on the stock servo, so I upped the game with a HS-7940TH servo; it puts out 222 oz.-in. of torque when pow­ered by 7.4 volts. That will get the job done! For con­trol, I stuck with Hitec and went with its Lynx 4S so that I would be able to ad­just things like end­point, expo, and so on. Power for it all comes from a Maxamps 2S Lipo bat­tery, with a hard case for

im­proved dura­bil­ity.

Tekin’s RX8 is a smooth speed con­trol, with lots of ad­just­ments that will let me dial in my Bomber. I mounted it to a cus­tom-made car­bon-fiber plate.

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