Class Specifications

Classes are important for the following reasons:

  1. They level the playing field so one pilot doesn’t have an advantage over another by using more powerful equipment.  This allows the pilot’s skill to win the race, not their equipment.
  2. Aircraft builds can be planned with confidence that they will be accepted into competition.
  3. To ensure radio equipment is compatible with fellow pilot’s equipment as to not cause interference.


Aircraft Specifications

These are only guidelines or suggestions for chapters to get started. These are not compulsory.


Class Frame Prop Weight Battery VTX
Props must be fully surrounded by covers or ducts.
No Limit 31mm Max

35mm may be permitted by the local race director

35g Max 1 cell

2 cell may be permitted by the local race director

25mW Max
OPEN 305mm Max No Limit 800g Max No Limit 25mW Max
MEGA 800-1050mm No Limit TBD No Limit 25mW Max


Gate Specifications

Class Gate Opening Material
361 sq in  (19”x19” – 483mm x 483mm)
OPEN 25 sq ft  (5’x5’ – 1.52m x 1.52m) PVC Mesh
Championship Size 42 sq ft  (7’x6’ – 2.13 x 1.82) PVC Mesh
MEGA 144 sq ft  (12’x12’ – 3.66m x 3.66m) PVC Mesh

Open class:

The Open Class is available to all multirotors.  This class is designed to promote competition between all styles and configurations of aircraft to help evolve innovation in technology and design.

Tiny Whoop class:

The Tiny Whoop class produces an aircraft that is safe, fun, affordable and approachable to all skill levels. These aircraft are very small and light resulting in little to no property damage when crashed. Therefore they can be flown in venues larger racing drones could not, allowing a truly unique and fun filled racing experience for both pilots and spectators alike.

Mega Class:

The Mega Class is targeted at giant size drones that are larger than 800mm.  This class is designed to provide a guidelines for those seeking to race large scale drones.

Texas spec:

Utilizing the same rules for motors, props, frames as the Open Class, the Texas Spec class utilizes a calculator app to determine the max throttle setting (throttle cap) to be utilized for each drone.  This spec has been used at many local events resulting loads of fun among friends.  Texas Spec Calculator


* While not mandated, it is highly encouraged that pilots install high intensity LED’s at a minimum on the rear of their aircraft for an elevated pilot racing experiences and on the sides and front of their aircraft for both an elevated spectator experience and safety.

How classes are determined:

Classes are determined based upon the lipo battery cell used to power the aircraft.

Classes can be further defined by specifications including but not limited to:

  • Battery capacity
  • Battery voltage
  • Flight controller
  • Motor size
  • Number of motors
  • Number of propeller blades
  • Propeller size
  • Video transmitter (VTx)
  • Weight


Remember, classes are guidelines to provide competitive standards within a typical MultiGP race day.  Chapters can choose to define and run their own classes if they wish by definining them during event planning.

Many pilots will ask why the power limit of the Video Transmitter (VTx) is limited to 25mW.  This is to increase the success rate of multiple pilots having perfectly clear video transmission.  If some pilots are transmitting at a higher power, the chance of experiencing frequency issues increases.

As new technology is released, classes and specs will be updated to either incorporate or withhold the advancements to maintain fair competition as the number one priority.

All aircraft must be built with the ability to easily change vTx channels in a timely and accurate manner.

Please race safely!