CineLog25 WSML Sub250g


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Featuring: GEPRC CineLog 25 sub 250g

Including

  • Walksnail Moonlight 4K VTX with two antenna
  • Radiomaster RP3 ELRS RCV with two antenna
  • Battery Tattu 4S 850mAh 95C
  • Foam cover giving buoancy in case of failsafe over water

Idea

I wanted to build a sub 250g quad with 4K video recording for a sailing event. As I'm invested in the Walksnail Avatar from the beginning, I decided to use the new Moonlight VTX for this project. The quad should be a sturdy and lightweight cinewhoop that can fly over water without the risk to loose it in case of a failsafe. It should also weigh less than 250g to safely and legally fly it in the vicinity of people.

Choosing the right QuadCopter

There are several suitable quads in the market. I wanted to use the largest quad that can fit under 250g. I decided for the GEPRC CineLog25 because of some very positive youtube tests. The original CineLog25 equipped with the Moonlight and 850mAh battery weighted around 275g. But I like to tune things to their maximum and accepted the challenge.

Stripping CineLog25

  • GPS removed (takes too long to get a sat fix anyway)
  • Removed all screws and standoffs removed body
  • Bottom carbon plate removed
  • Motors moved outside by one hole and mounted with only two flange screws each (improves airflow and flight time)
  • FC, VTX and bottom plate now mounted by 2mm nylon straps
  • Battery and canopy now hold by thin rubber bands
  • Canopy and bottom plate carved from 10mm foam boards
  • Battery cables shortened to a minimum
  • All adhesive foils removed from battery and replaced by single capton tape

Flight time now is 7-8 minutes until 3.5V/cell.

Gregor Rebel in Summer of 2024









[jpg, 285kB]
#001: Total Quad including Walksnail Moonlight and 4S 850mAh Tattu 95C weighs less than 250g 		[jpg, 349kB]
#002: Replaced screws and standoffs by nylon zippers and carbon by foam sheets 		[jpg, 382kB]
#003: shortening battery cables and removing foils gave another 8gramms