Question: Hey Doc- I have an Ansmann Racing Royal Flash – when I switch the car on, motor starts to turn backwards without any throttle being used. I can adjust the throttle trim to stop …
Read More »Ansmann Royal Flash Has the Backwards Blues
Welcome to The RC Doctor, an area of CompetitionX dedicated to helping you diagnose and repair any RC car or truck problems. With over 20 years of RC experience, The RC Doctor provides expert advice on nearly all subjects related to RC cars and trucks. We can help you troubleshoot everything from faulty electronics to broken chassis/suspension parts and point you in the right direction on how to get it fixed. If you have an ailing RC, fill out the Ask The RC Doctor form on the right and let us help you diagnose your problem!
Recent Surgeries
B4 Buggy Has a Slippery Rear End
Question: RC Doc- I’ve been driving my Team Associated B4.2 Buggy for a while, self-teaching myself mechanics and such. What I can’t figure out is how to keep the back end from spinning out and …
Read More »Bad Bugs Buggy Steering
Question: Doctor- The steering in my HobbyKing Bad Bug is pretty sloppy. I watched an online review that stated I need to tighten the steering servo and use a little bit of threadlock to keep …
Read More »Team Durango Turning Troubles
Question: Hey Doc- I have a Team Durango DEX410v3 and having some issues with it turning. Our track is on a gymnasium floor that has carpet patches in the corners. On the straights its fine, …
Read More »Keep the Front End Down on my Traxxas Stampede Wheelie Machine
Question: Hey Doc- I recently bought a Dynamite 15T brushed motor and a Dynamite brushed ESC for my modified Traxxas Stampede. My problem is that I have too much torque now and every time I …
Read More »Hey LRP, Where’s My Reverse?
Question: Hi Doc- I recently purchased a second hand car with the LRP IPC V6 ESC installed in it. My problem is that there is no reverse on the remote. I replaced the old remote …
Read More »Wiper Speed Control Not Powering Motor
Question: Hey Doc- I have an older Tamiya Blackfoot that uses a wiper speed control. When I turn it on, the servo moves the wiper arm back and forth, but the truck doesn’t go anywhere. …
Read More »Hobbywing V3 – Huh, Yeah, What is it Good For?
Question: Hiya Doctor- Hi guys, great site!!!! I have certainly learned more about motors, ESC’s, Kv etc. while being here. My question is this: I recently purchased a Hobbywing V3 ESC – best buy ever! …
Read More »HPI 5B AVC (or DBox-2)
Question: Hi Doc- Can I use a Spektrum DX2E and SRS4200 (AVC) Receiver on my HPI Baja 5B? I was thinking it might make it alot easier to drive. Thanks for your help! Kudin Answer: …
Read More »DHK Wolf – Steering But No Motor
Question: Hiya Doc- I have a DHK Wolf with a brushless motor and when I turn my car on, it recognizes the but the motor doesn’t respond. Do you think it’s the motor or the …
Read More »Sticky HPI 5B Steering
Question: Hi Doctor- I have a HPI Baja 5B and am currently racing it in any race I can find. I have been having a problem with the steering returning to center. I have checked …
Read More »Convert my Masito Rock Crawler to 9.6v
Question: Hiya Doctor- I bought a brand new Maisto Rock Crawler not to long ago. I wired a 9.6v battery to it (like everyone is doing) and it worked fine right up to the point …
Read More »Diff-icult Question
Question: Hi Doctor- This question is about the Differential setup you have on your site: https://www.competitionx.com/rc-racing/rc-tuning-guide/rc-tuning-differential/. I’m running a Tamiya TA05R and I use it mostly for racing so speed is crucial. I also need …
Read More »Tamiya RX7 Topping My HPI Sprint 2 – Will It Fit?
Question: Hey Doc, Would a Tamiya 51270 Mazda RX-7 Body fit on my HPI Sprint 2? I read somewhere that it will fit no problem, but upon doing a little research the Tamiya body is …
Read More »Motor Turn Question
Question: Hiya Doc- I just got back into R/C’s again and recently purchased the Duratrax Evader EXT2.4. I know its not the greatest truck in the world but it will handle a beating and it …
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