Originally Posted by
EDMJ
RWY 36 TODA is 3750 m. In this case, I wouldn‘t during normal operations expect a light jet to crash through the fence at the far end. In other words, I wonder whether one could/should put a question mark on an airshow-style take-off (all of the aircraft seem to very low) from an airport during normal operations, where corresponding precautions have not been taken (such as stopping traffic on the crossing road).
?
Pretty sure that birds are more likely to get out of the way of a flock of jets than just one, if anything, but they still get strikes. Birds forget to give way to jumbo jets, so just not sure that there is much to debate about added birdstrike risk from a formation takeoff. These guys had a fair amount of energy already, but not sufficient to allow a turn back, and there was no great choices remaining. The decision speed for an turn back is dependent on the runway geometry (the minimum height loss/energy loss to reposition to a runway). A 180, would have a decision speed somewhere near 180 kts with a low drag index. It can be possible to do the turn below that, but not much less for a straight winged jet like a 326, 339, SMR, SOKO, L-28, IS-2, S-211 etc. The L-39 will need a bit higher speed, a Fouga, a little less. Even with routine practice, it is a high risk event.
Traffic stoplights might be a response, but there can be a fair spread laterally on the trajectory of an abandoned aircraft or an aircraft that needs to be abandoned. Consider the Red Arrows ATB practice out of Valley, where it didn't work out but the wreckage missed all 3rd parties. Being near any airport comes with a slightly elevated risk.