RGClark
Mathematician
- Joined
- Jan 27, 2010
- Messages
- 1,635
- Reaction score
- 1
- Points
- 36
- Location
- Philadelphia
- Website
- exoscientist.blogspot.com
Some other problems with the flight procedure become apparent from the video I posted in post #150. During that flight in September, 2013, the feathering was unlocked at about 16 seconds into the engine burn, and the feathering deployed correctly only later after engine cutoff.
But in the failed flight the catastrophic unlocking occurred only 9 seconds into the engine burn. That leaves a scant less than 7 second window to perform this action of unlocking that will lead to mission success or complete destruction of the vehicle. It's very disconcerting to know this would be the procedure as well for the passenger carrying flights.
Another key problem from listening to the video is that the pilots are not calling out the speed and altitude during the burn. The only time they call out the altitude is a few seconds after the engine cutoff when they are close to max altitude. Note that when landing jet airliners when speed and altitude are both critical to a safe landing the pilots are calling these out to ensure they are within the correct range. The SS2 pilots should also be calling out both speed and altitude during the engine burn to insure this mission critical step of the unlocking is done only at the right time.
Bob Clark
But in the failed flight the catastrophic unlocking occurred only 9 seconds into the engine burn. That leaves a scant less than 7 second window to perform this action of unlocking that will lead to mission success or complete destruction of the vehicle. It's very disconcerting to know this would be the procedure as well for the passenger carrying flights.
Another key problem from listening to the video is that the pilots are not calling out the speed and altitude during the burn. The only time they call out the altitude is a few seconds after the engine cutoff when they are close to max altitude. Note that when landing jet airliners when speed and altitude are both critical to a safe landing the pilots are calling these out to ensure they are within the correct range. The SS2 pilots should also be calling out both speed and altitude during the engine burn to insure this mission critical step of the unlocking is done only at the right time.
Bob Clark