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Warnings, Safety, and Responsibility

Always assume the worst can happen.

While a RubyTM system that is properly installed, configured, and in good condition greatly reduces the chances of your plane crashing, it is still possible for your plane to crash. There's not much any flight stabilizer or autopilot can do if, for example, it or another critical component fails, the panic button is invoked in a dive too close to the ground, or strong winds overpower the plane.

Ruby itself is not bulletproof. Something as small as a drop of water in the pitot tube could prevent it from being able to keep your plane in the air on its own. There's also the possibility that you are presenting Ruby with an unusual set of circumstances that haven't been considered or tested yet, or that an error in design or code has escaped uThere's testing.

  • Read the operating instructions carefully.
  • Always be prepared to take immediate manual control.
  • Don't fly beyond the limits or rules of conventional remote controlled aircraft.
  • Don't fly over populated areas or anything you can't afford to crash into.
  • Be sure that the plane is always kept within good range of the eyes, transmitter and receiver of you or someone on an active "buddy box".
  • Do not allow children to fly without supervision.

For younger children and new pilots, it is recommended that an adult be in control during launch and land, control is only given to a to child once plane is at loiter altitude, and an adult is always standing by, prepared to grab the transmitter and assume immediate manual control.

As the operator, you alone are ultimately responsible for safe operation and bear all potential liability for damages or injury that may occur during operation, including those that may result from failure of any component, including Ruby.


Beware the Ruby-controlled propeller!

On the ground, the greatest potential for danger resides in the propeller and throttle. If radio contact between your handheld transmitter and receiver suffers loss or interference -or- if while in autonomous or altitude hold mode, your throttle control (usually the left stick) is not in the “off” position (usually the position bottommost / towards you), it is possible for Ruby to suddenly apply full throttle without warning in an attempt to climb back to loitering altitude. Although Ruby has safeguards to make spontaneous throttling unlikely, it's still possible, even when the plane is resting on the ground. Until you have moved the throttle stick to the "off" position and are certain that the plane is receiving your handheld transmitter signal clearly, always approach and hold the plane as if the propeller could be powered full speed at any moment. Make sure everyone around the plane is aware of this danger. It's a good habit to hold your thumb on top of the base of the throttle stick when you have the transmitter in hand.

Different transmitters use different channels for the throttle. If your Ruby is configured with the wrong channel for throttle, the propeller could spin as soon as power is applied to the plane. Remove the propeller or power to the motor whenever powering your plane with new or changed Ruby configuration or firmware.


Stay tuned for advisories

As Ruby is tested and used in new applications and conditions, we may find need to issue additional safety advisories. Make sure that we have a good email address for you in our mailing list (contact support@uthere.com to change your address), or check for the latest updated version of this page on the internet (http://uthere.com/products/ruby/warnings.html) often for updates.

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