the QD is not actually supposed to be quick at all!!! So it is actually not over engineered. Please call it by a more sensible term for future generations. Here comes the day job….look away if you are easily bored!
The ‘QD’/ bayonet clip is in the cards/checks to make sure it is attached – because it is an emergency item it requires two actions to ‘undo’ pull back on spring whilst holding the male part – also must have diffrerent action to operate than any similiarly located item. Some fast jets have dinghy packs held by two MB disconnects (which you release on the descent) – the dinghy/PSP falls and you use its touchdown to gauge when ‘to adopt the pose’!
For helios with chutes – same as some fast jets (i.e. those with automatic disconnect).
For helios without chutes, you would not want to disconnect any of the disconnects whilst in the helio and underwater – snagging hazard. Bobbing around outside you would want to make sure you disconnected the MB clips not the bayonet – as it would just float away…..not good……so if you were flying in a non ejection seat equipped Meteor, you still would not want to accidentally disconnect the bayonet.
During sea drills they can get a bit tough to release – but it is a good enduringdesign that has made MB a lot of money
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