• All Betaflight 4.4.2 Kaack Compatible Flight Controllers

Please note: Not every flight controller is compatible with Betaflight 4.4.2 Kaack. This may include flight controllers that require proprietary firmware, such as those made by NewBeeDrone, or those which use components that are not supported in Betaflight 4.4, such as flight controllers using an AT32 processor. If you're buying a well known flight controller that isn't made by NewBeeDrone and doesn't use an AT32 processor, you most likely will find that it is compatible with the Kaack 4.4.2 firmware.

Note on SPI Receivers: While SPI receivers are legal in the spec, they do increase CPU load, which is in limited supply on an F411 processor running the RPM Limiter. You may consider running an external receiver on your flight controllers that use an integrated SPI receiver.

• Any 1s capable 8 bit ESCs rated between 5a-12a

Please note: 32 bit ESCs are not legal. This would include ESCs listed as being "BLHeli32" or "AM32" ESCs. Most ESCs you'll find on micro drones will be 8 bit ESCs, which are typically listed as "BLHeli-S" or "BlueJay" capable.

• BetaFPV Meteor75

• BetaFPV Meteor75 Air

• NewBeeDrone Cockroach 75

• Happymodel Mobula 7 V2

• Happymodel Mobula 7 V3

• Happymodel Mobula 7 V4

• Fractal Engineering Fractal 75

Please Note: "Pro" frames, which are those compatible with 45mm propellers, are NOT legal. The main examples of this would be the BetaFPV "Meteor75 Pro" and Fractal Engineering "Fractal 75 Pro Max". The similar naming convention of these frames can sometimes confuse pilots into thinking they are legal. They are not.

Also note: frame modifications done for weight loss or performance gain are not legal. This includes clipping or shaving your frame. You may, however, add 3D prints or glue to your builds. You may modify, expand, or clip your battery tray if it is necessary to fit your batteries. You may do a small amount of clipping if it is necessary to access a port on your flight controller or VTX.

OFFICIAL MOTORS (RECOMMENDED)

• Aerial Outlaws UWL Lite 802 19,000kv

• UWL Limited Edition 802 19,000kv

OTHER APPROVED MOTORS

• Happymodel EX0802 19,000kv - Unibell

• Happymodel EX0802 19,000kv - Split Bell

• Happymodel SE0802 19,000kv

LEGAL UNTIL NOVEMBER 1, 2025

• Tiny Whoop Boost Juice - Gold Unibell

• Tiny Whoop Boost Juice - White Split Bell

• Tiny Whoop Ginko - Black/Red

• Tiny Whoop Ginko - Gold/Black

TESTING

Testing for the SL Limiter has concluded. Thank you for your help in participating. The results of this testing are that we must require a stricter motor spec and are unable to open up the spec to more motors at this time.

Please Note: UDL does not have control over the manufacturing of motors that aren't made by Aerial Outlaws. Legality around other motors can change at any given moment due to this, and it's not in our control how other companies will protect the investments of their customers. We've already started to see some similar types of issues pop up that threatened the legality of already approved motors. If you're looking to buy motors specifically for the Igniter class, it is recommended that you purchase official motors as these are the most highly tested and most protected investment.

• Gemfan 1610 - 1mm Shaft

• Gemfan 1610 - 1.5mm Shaft

Please note: The 1mm version of these propellers may be drilled out to fit a 1.5mm shaft. This is the only modification that may be done to propellers

• NTSC/PAL Analog Cameras

• HDZero 60FPS Cameras

Please Note: If you want to use HDZero 90FPS Cameras, these are currently legal, however, your Igniter must weigh at least 41g. These cameras may not always be legal.

Please Note: If you want to use Walksnail, make sure that your local race director allows it. These video systems may not be legal at larger races, including official championships, due to the inability to stream it and other special processes required to allow them to integrate into our race environments. If you are using Walksnail, please set it to Race mode as this causes the least interference for other pilots and it allows it to be used with lap timing systems. There is no FPS limit on Walksnail currently, so you may use it in 100FPS mode.

• NTSC/PAL Analog VTX's capable of 25mw

• HDZero VTX's capable of 1s

Please note: VTX's must have a 25mw setting AND be able to accurately and consistently output at 25mw when measured. If you do not have the ability to measure your own output power, it is recommended that you do not use any flight controllers with a built in VTX as these tend to be less reliable. It is better to use a reputable external VTX or one that is OpenVTX compatible.

Please Note: If you want to use Walksnail, make sure that your local race director allows it. These video systems may not be legal at larger races, including official championships, due to the inability to stream it and other special processes required to allow them to integrate into our race environments. If you are using Walksnail, please set it to Race mode as this causes the least interference for other pilots and it allows it to be used with lap timing systems. There is no FPS limit on Walksnail currently, so you may use it in 100FPS mode.

• 2.4ghz receivers (including ELRS, FRSKY D8, DSMX, Tracer, and Ghost)

• 915mhz/868mhs (including ELRS and Crossfire)

Please Note: If using a 915mhz/868mhz receiver, make sure that it is set to the correct setting for your region's federal regulations. 2.4ghz ELRS is generally recommended.

• Any 1s 450mah Battery

• Individual LEDs that are 603 or larger in size

• LED Strips

• COB Strips

• Probably any other type of LED with reasonable brightness

Please note: You must use LEDs and the actual configurations you can use can be quite strict. Check the LED specific rules and reach out if you have questions about the legality of your LEDs or the legality of their configuration.

• Betaflight 4.4.2 Kaack SL Commit (Flight Controller)

• BlueJay 0.17 and newer (ESCS)

• Any VTX/RX firmware, though ELRS and OpenVTX are generally recommended

Please note: You may not use ANY firmware for your ESCs or Flight Controller that isn't listed here. Quicksilver and JESC, for instance, may not be used. ESCs and Flight Controllers that don't support these firmwares may not be used.

Learn how to set up your firmware here.