Door Latch Safety

The Velocity door system includes 4 door safety latching pins that lock into receivers on the fuselage. When latched, the door becomes a very strong reinforced section of the fuselage, as both the door and the fuselage have carbon beams that when connected become a very stiff structure. A safety latch drops behind a latching rod when fully inserted, and must be manually lifted separate from the door lever to unlatch the pins. This safety feature has an emergency escape feature that includes a pin that extends through the door so that rescue workers can unlatch the pilot side pins from outside of the airplane. Many builders (and most factory aircraft) include a microswitch to verify that the pins are fully inserted. On my aircraft (N44VF) I elected to not sense the door pin position, but rather that the safety latch is fully down and locked. My warning lamp requires both door safety latches to be fully down and locked for the warning lamp to be extinguished.

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