Race Day Quad Mach 1 with EMAX RS2 2306 2400KV

This year my friends and I stared a local FPV drone racing series. Nothing serious, just a couple of guys meeting once in a while and measuring times over the track. 100% amateur thing. After the second race, I’ve realized that I do not have a drone designed for racing: more than 400g without a battery! That is just too heavy for any kind of competitive racing. The solution was simple: I need a good racing machine. Much, much lighter than the current one.

As a result, Mach 1 was born

Radio Magic – the one with the antenna gain

Hands up, who gets antenna gain? Like why 2dBd is better than 3dBi and why 8dBi might not be a good choice after all? This whole antenna gain topic might be quite confusing. Not only there are 2 units dBi and dBd (since blame marketing for that!) but also one must realize that antenna does not really have a gain like an amplifier or transistor. If 100mW will be put into antenna it will never radiate more than a 100mW. Truth to be told, it will always radiate less than that!

The news: FrSky ACCESS, BF4.0, F7, SP Racing H7, F7, INAV Radar and Russian Drones In Space

  • FrSky has announced new air protocol: ACCESS
  • Betaflight 4.0 is just around the corner
  • The topic of F7 as in STM32F7 flight controllers and INAV
  • INAV Radar.
  • Dominic Clifton aka Hydra, known from Cleanflight and Seriously Pro Racing (SP Racing F3, SP Racing F4, SP Racing F7 and so on) is preparing something new: flight controller based on STM32H750 processor: SP Racing H7 Extreme -Russians are putting drones into space! Cosmic Drones you might say.

This is my 7-inch TBS Source One

This is my 7-inch version of TBS Source One quadcopter frame. So far, so good, Source One is really tough and stiff frame so all the problems with resonance and oscillations in flight should be over. And looks like they are over.

It might sound like a good old V8 engine but flies smooth. And after all, that was my ultimate goal. So let’s say “bye, bye” to wobbly-wobbly iFlight XL7 v2 and say “hello” to 7-inch Source One! 6mm thick arms are the way to go!

How to setup INAV on a flying wing – video tutorial – GPS, Baro and Compass

  • Do you need a barometer on a flying wing with INAV?
  • Do you need a compass/magnetometer on a flying wing?
  • How to set up a GPS unit and which protocol should you use?
  • Do advanced tuning and set up a return to home, banking angles, landing procedures etc.
  • Configure the most important GPS related flight modes: PosHold, AltHold, and RTH
  • some extra tips and tricks like Galileo support for GPS

INAV and Failsafe – especially for FrSky owners (but not only)

  • You should not trust a guy on YouTube that says that he knows it all
  • OpenTX “no signal” is not the best failsafe setting when FrSky S.BUS devices are used and why
  • Than “Hold” failsafe setting might actually be a better option when S.BUS is used
  • How to setup Failsafe in INAV to have the best experience and safe flight

How to make 868MHz or 915MHz dipole antennas for FrSky R9 or TBS Crossfire receivers

The correct length of 868/915MHz antennas used by FrSky R9 and TBS Crossfire is:

  • for FCC 915MHz it is 75mm
  • for EU/LBT 868MHz it is 80mm

From time to time FrSky has a big problem with cutting their antennas to a correct length. Good thing, you can make your own TBS Crossfire RX antennas for cheap!