The 3B-R Combo is a great choice for a small build race drone. The 1606 3500KV brushless motors are included within the drone and Gemfan 3035 Triblade propellers are included also which will raise the thrust to weight ratio up to 12:1, this will allow you to reach insane speeds. The frame is designed for aerodynamic purposes which will effectively reduce wind drag to ensure a more efficient flight, this is why the front is higher and the rear is lower. With all these great features you will also have a RunCam Swift Mini CCD camera which is the perfect camera to receive great high-resolution images in different conditions.
Spedix Stack (Flight Controller, VTX and PDB)
The Spedix IS100 is an all-in-one 20×20mm mini quadcopter stack with 4 in 1 ESC board, Omnibus F4 flight controller and 5.8GHz 25/100mW switchable 40-channel video transmitter. On the bottom of the stack is a powerful 4-in-1 speed controller supporting 2-4s and up to Dshot600 with blheli_s firmware. The ESCs can support 10 second bursts of 25A and continuous currents up to 20 amps. The FC sits at the centre of the stack using OMNIBUS F4SD and has an integrated 5.1V/1.2A BEC. It is an STM32 F405 flight control board with integrated OSD and MPU6000 gyro. There are SBUS/PPM and DSM ports for radio.