YLRC S138 Brushless Optical Flow Obstacle Avoidance Drone Flight Test Review @Quadcopter101
YLRC S138 Brushless Optical Flow Obstacle Avoidance Drone Flight Test Review  @Quadcopter101
Uploaded March 2023 | Updated September 2026, 2 weeks ago
This beginner's learn to fly drone does not require registration, and includes brushless motors, obstacle avoidance, and a very effective optical flow system for automatic hovering. Find it here bit.ly/S138Drone
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Pros
- Portable folding drone with carrying case for drone and its accessories.
- Weighs only 128 grams with battery. Does not require registration in most countries.
- Brushless motors for durability (vs. brushed motor drones).
- Highly effective optical flow system prevents the drone from wandering, even in relatively strong wind.
- 360 degree obstacle avoidance system can be clipped on to improve safety of indoor flying.
- 3.7V 1600 mah battery provides up to 20 minutes flight time per charge (I got 12 minutes on a very windy day).
- Advanced flight modes include optical flow, altitude hold, headless mode, flips, and flight path (via app only).
- Camera can take and record 720p video, and interpolated 4K still photos directly to your phone via WiFi. Camera also includes remote up down lens tilt control via the remote controller.
- Uses the "WiFi UAV" app available on Google Play here bit.ly/WIFI-UAV and the Apple App Store here apple.co/2HB731W . App uses common 2.4 Ghz WiFi, which is available on most phones.

Cons
- Drone does not have a GPS. Although it can automatically hover in place like a GPS drone, it does not have the capability of a GPS drone of being able to automatically return to home and land where it took off from.
- The camera is not very good. Again, this is mainly meant as a beginner's learn to fly drone.
- Although you can fly this indoors, I personally would not recommend doing such by beginner pilots. It's brushless motor drones are powerful, and its spinning props brushing against skin can cause damage.

Affiliate links: At no cost to you, I do receive a small commission for sales resulting from these links.

This video along with every video of the Quadcopter 101 channel was produced and edited with VSDC Free Video Editor. You may download this excellent, and no kidding "free" video editor here videosoftdev.com/free-video-editor

MUSIC LICENSE
"Awel" by stefsax
ccmixter.org/files/stefsax/7785
is licensed under a Creative Commons license:
creativecommons.org/licenses/by/2.5
music was shortened to fit length of video.
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YLRC S138 Brushless Optical Flow Obstacle Avoidance Drone Flight Test Review

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