Simulating a Crash
A crash can happen in different ways. Let’s simulate it only :) Here are some scenarios.
● Turn off your transmitter ( failsafe ) and move your plane to another spot (scenario: flying behind a
mountain, with subsequent crash )
● Power down the battery (scenario: battery eject on crash)
● Just let it sit there (scenario: landing in a tree)
Search and rescue
The copter/plane is lost - now we’ll start the S&R mission. It’s important to get the link back to either get
the latest GPS coordinates or have the ability to point into the direction based on the signal strength.
● In some cases the link is not even lost. Skip below and move to “Link regained” chapter
● Read the coordinates from your OLED and go to the place of the latest coordinates. If you don’t
have a GPS try to go as close as possible to the last known position.
● Get yourself to an exposed position as close to the target as you remember from the crash or
based on OLED coordinates
● Toggle between find mode (greater range, less telemetry) and full link (less range, full telemetry). If
you have lost main power your quad will respond in find mode. For all other scenarios, you should
be able to regain control. When you see “find mode activated” on your LCD, give it more than a
minute before you deactivate it again ( beacon timing, see description above ). If you use the DIY
reflector point and hold in different directions until you get your link back.
Link regained
Once you got your link back to your copter/plane you can now try to find it. It’s recommended to keep the
mode you got your signal back no matter if it’s actually find mode or selected operation mode.
● GPS source attached to receiver
○ The receiver will share the latest coordinates with the transmitter and display them on the
OLED.
○ For Droidplanner app select Bluetooth ( Crossfire App link mode needs to be set to
MAVLink emulator ) to locate your copter/plane
○ Write down the coordinates use any GPS to find the location
● No GPS source attached
○ Make your transmitter antenna a directional one. This can be done by the DIY reflector or
you can use your body to lower the signal strength from one direction ( works for
emergencies )
○ Turn yourself slowly in a circle and try to figure out the direction the signal strength is the
strongest. Walk this direction and repeat this until you found the copter/plane. For this
practice some exercise is recommended.
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