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FT Guardian Gremlin v.2

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The Guardian Gremlin v.2 is an incredibly powerful, yet reliable, and very controllable FPV drone. Safe for inside or outside flying. STEM-approved fun!

FT Guardian Gremlin v.2


FT Guardian Gremlin v.2


The Gremlins are back and ready for any skill level and budget. The new FT Guardian Gremlin v.2 is a result of multiple attempts to capture the right experience for the beginner, but also give the experienced pilot something to play with around the house.

This new design will provide hours of fun when coupled with a good supply of batteries. Additionally, the characteristics of the Guardian v.2 feature an incredibly powerful, yet reliable, and very controllable aircraft. The best of all is that the design protects all of the moving parts and key components, making it safe and durable for inside or outside flying. Designed for STEM, it can also be enjoyed by everyone!


The FT Guardian Gremlin Specifications

  • Size: L:147mm / W:162mm / D:30mm
  • Weight: ~ 105g without Battery (~148g with 2s battery) - (~ 186g with 3S recommended battery)
  • Gremlin Guardian Delrin Frame Kit
    • Top Plate
    • Bottom Plate
    • Standoffs: Nylon Hex 20mm x 12
    • Fasteners: Nylon 6mm x 24?ÿ
    • Camera Mount
    • Battery Retention O-Ring
  • Size: L:147mm / W:162mm / D:30mm
  • Weight: ~ 105g without Battery (~148g with 2s battery) - (~ 186g with 3S recommended battery)
  • Flight Controller: JHEMCU GHF411AIO-BMI 40A All-In-One
  • Mounting Pattern: 25.5mm x 25.5mm
  • Input Voltage: 2-6S (7.4V - 26V)
  • BEC: 5V / 2.5A & 10V / 2A
  • Gyro: BMI270
  • MCU: 100MHz STM32F411CEU
  • Receiver Compatibility: SBUS / IBUS / DSM2 / DSMX / TBS / ELRS
  • Blackbox: 8MB Memory
  • UARTs: 2
  • OSD: AT7456E
  • USB: Micro USB / USB-C (Add-On Board)
  • ESC Current: 40A x 4
  • ESC Firmware: BlHeli_S
  • ESC Protocols: PWM / OneShot42 / OneShot125 / MultiShot / DShot 150 / DShot 300 / DShot 600
  • TVS Protection: Yes (Add-On Board)
  • Size: 33mm x 33mm
  • Weight: 7.6g
Motors: FT Gremlin 1104 5400kv
  • Weight (Including Cables): 5g
  • Configuration: 9N12P
  • Shaft Diameter: 1.5mm
  • Voltage: 2-3S
  • Stator: 1104
  • Mounting Pattern: 9mm x 9mm
Camera: Caddx Ant AIO FPV Camera
  • Image Sensor: 1/3 CMOS Sensor
  • Horizontal Resolution: 1200 TVL
  • System: NTSC
  • Image: 16:9
  • Lens: 2.1mm
  • FOV: 145?ø
  • Minimum Illumination: 0.01 Lux
  • Dimensions: 14mm x 16mm
  • Power Input: 3.3V 6V
  • Frequency Band: 5.8GHz
  • Channels: 38
  • Transmitting Power: 25mW 100mW
  • Weight: 3g
Recommended 2S Battery
  • Capacity: 650-800mAh
  • Voltage: 7.4
  • Discharge Rate: 45C
  • Max Burst Discharge Rate: 90C
  • Configuration: 2S1P
  • Net Weight: 43g
  • Size: 49mm x 24mm x 19mm
  • Discharge Plug: XT30
  • Balance Plug: JST-XH

The FT Guardian Gremlin v.2 Get Started Bundle?ÿincludes the following components:

  • (4) FT Gremlin 1104 5400kV Brushless Motors
  • (1)?ÿGHF411 PRO-BMI 40A Toothpick F4 2-6S AIO Brushless Flight Controller
  • (1) XT-30 with 40mm leads
  • (1)?ÿHQ Durable Prop T2.5X2.5X3 (2CW+2CCW)-Polycarbonate
  • (1) Caddx Ant AIO FPV Camera 16:9 Black
  • (1)?ÿRadioMaster Zorro 4-in-1 with Batteries
  • (1)?ÿRadioMaster R81 Satellite Receiver
  • (1)?ÿBeta FPV VR02 FPV Goggles
  • (1) Lipo Battery Pack With XT-30 Plug
  • (1)?ÿB3 Pro Compact Charger

The FT Guardian Gremlin Videos

  • Almost working

    Posted by Dylan on 23rd Oct 2022

    The kid and I recently built the FT GG v.2 kit from the Flight Test store. The built and the follow-up programming video were great. After a couple of dead-ends, with the stick input from RX not registering on the flight controller, a firmware flash from Betaflight did the trick. I noticed that there were a couple of relevant lines in the dump file, so we ran those commands and saved. We are using the suggested 800mAh 2S LiPo battery. A single motor direction needed to be reversed in the BL Heli configurator.

    Additional commands run in betaflight:
    feature RX_SERIAL
    set motor_pwm_protocol = DSHOT600
    profile 0
    rateprofile 0

    As far as we can tell everything is "right":
    * motors in "X" configuration
    * accelerometers calibrated
    * motors 1, 2, 3, 4 in the correct positions as tested in betaflight
    * props installed according to the programming video
    * motors / props spinning correctly according to programming video
    * props free of obstructions
    * fully charged battery
    * prop screws appropriate length
    * controls, arm, and mode switches operate as expected in betaflight
    * flight controller installed with "forward" in the correct orientation

    After all of these checks / tests, the Gremlin arms and seems fine. Yaw controls operate as expected and the quad spins around on the floor. Increasing throttle appears to work until it instantly flips to the left and lands upside down. Every takeoff attempt results in a flip to the left. Apart from a bad motor or ESC, we can't think of anything else that could be causing this behavior. Pretty disappointed at this point.

  • Great Intro to Quads

    Posted by Steven Pierce on 22nd May 2022

    This is the second quad that I have owned (if you consider an Inductrix a real quad). After ordering this I watched the soldering video on Flite Test. I then watched the soldering video on Joshua Bardwell’s You Tube site. I ordered a soldering station with controllable temp and some practice solder boards. After some good practice solders on the practice board, I felt confident about soldering the flight controller. I immediately messed up by changing the solder temp. I was concerned about using too high a temp on the flight controller. I put too much solder on the pigtail pads and ended up with a short between the pads. I thought I had damaged the controller and attempted to order a new controller. Alas, with the chip shortage FT was out of FCs. I went back to the shorted FC and used solder wick to remove excess solder. The process worked and I was able to get the pigtail reconnected without a shorted connection. Soldering the motor connections went well. I then watched Joshua Bardwell’s videos on betaflight. After attempting to find the FC on betaflight, I went back to Wess’s video for setting up the Gremlin Gaudian. I followed his video and it went smoothly. Thanks Wes! Ithen found out my resolder on the pigtail was not very good. While removing the battery, the pigtail came loose. After resoldering the pigtail, I decided to remove the standoff between the pigtail lead and use two zip ties (or ZEEEEP Ties as David W. called them) to secure the two pigtail leads to the gremlin frame. This gave me a secure connection for pulling and pushing on the battery lead. Two of my motors required reversing and Wes’s video guided me through the process smoothly. This evening I flew the gremlin line-of-sight for the first time. After flying the Inductrix, I was amazed at the performance. For a little quad, it has so much more power. I briefly attempted to fly FPV and quickly realized I need some simulator time and more time flying line-of-sight. Great starter quad and, as usual, Great videos for the build and tune. Now I need to finish my Tutor build and get my Flerken built. Love Flite Test, the great guidance and the real people behind the product.

  • Guardian Gremlin

    Posted by Chris T. on 28th Mar 2022

    I have no prior experience with drones other than a DJI mini 2.

    The guardian can take a beating. Some how I managed to shear off one of the delrin screw heads, good thing they send extras. It is a real pleasure to learn on knowing that if it does crash(If you are new it will) you will still be able to fly it after, instead of waiting on new parts to arrive. I have been burning battery after battery on this thing for the last 4 days, and it is a blast. Make sure you have a good supply of batteries, you will not want to to stop flying once you start. It is decently acrobatic, and I have pulled off some rolls and loops with it, as well as smashed it into the ground and a few trees, but it still keeps kicking. I am also still on the first set of prop installed, thanks guys this thing is a blast to fly.

    The only downfall was the build instructions or lack there off(I understand a video is being made), and having to track down the pin outs for all the components. Building was easy once all the info was located.

    I would like to see the pin outs for the ANT AIO provided so we can access the built in betaflight OSD while flying. The color LED combos mentioned in the description for Channel, band and power do not match my camera. Mine are Green for Band, Red for Channel, and Blue for Power level.

    You may also want to bind the Sat RX prior to connecting it to the Flight controller.

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