Pulling the cockpit canopy jettison handle activates one M27 thruster which in turn. In aviation, to jettison is to discard fuel, external stores or other expendable items. You're talking about split second stuff here though and he'd have to be really hustling to be able to go to Plan "B" if Plan "A" failed. This test was performed in order to verify the quality of the thrusters. However, if the canopy fails to fire he still has the option of the internal canopy jettison handle which functions off a different system but accomplishes the same result (removing the canopy, which is necessary in order for the lanyards attached to the torque tube links to fire the M-99's to continue the ejection sequence).
If that were the case, I wouldn't want to be a member of that units Egress Shop if he actually made it back in one piece and even less if he didn't make it back at all.Ĭonsidering that in most cases the pilot has only a few seconds to make the decision to eject in the first place, it doesn't leave him much time to consider any alternatives if the first one doesn't quite work the way it should. It's difficult to conceive of a credible scenario that would have the Viper pilot still in the cockpit, ejection control handle fully deployed and nothing happening really. As the rockets rotate the canopy 41 degrees, the canopy hinges are disengaged and the canopy is propelled from the aircraft.
Simultaneously, the DTAs fire the CARB (canopy actuator release bolt) and then the canopy remover rockets. This action detaches the latch retainers and allows the latch levers to pivot out of the path of the canopy hooks. The DTA initiators fire the ECRLs (emergency canopy release line) which expand at each of the canopy latch fittings and break the frangible latch lever retainer bolts. When initiated, hot gas travels to the sequence valves and fires DTA (detonation transfer assembly) initiators. The canopy jettison is initiated by pulling either the internal canopy jettison handle or either of the two external canopy jettison handles. This Product is made to order and custom. send you an invoice for exact delivery cost toward any purchase made. The posts on which the canopy lock onto are broken by explosives (sorry - hot gases)and allow the canopy to release. 1/7 AH64 Apache Canopy Jettison - Available.