I TOLD YOU TO LEAVE IT ALONE.

[Aqua Blue RS/SS]

Originally Posted by pyroguy

Why is my knee hitting the key if I haven’t hit anything? If I haven’t hit anything I don’t need the airbags do I? My point is that if something has caused me to dislodge from my point of rest while driving my airbag sensors are going to trip causing my airbags to trip, so if my knee hits the key after my sensors have tripped and my airbags are beginning to deploy it doesn’t matter because the fuse head has initiated the small explosion to inflate the air bag. Hence my logic for not worrying about the key recall.

Yep I agree 100%.

[ZED SLED]

Some fun facts about airbag systems. This is based on my time on an engineering team designing airbag controllers for a tier 1 supplier in the mid-late '90s. Sure, some things have probably been improved, but the gist of it is as follows, or at least it was. If anyone on here is a current designer of airbag systems feel free to post up.
For a frontal airbag systems the firing of the squib is based on something referred to as the 5 inch 30mS time. This comes from crash testing data on every make and model. (I spent a lot of time at the Ford crash test facility in Dearborn). This means that from the crash data the time is recorded for how long it takes for the occupant to travel (chest) 5 inches during the event. This time can be anywhere from lets say 45-75ms at approx 40-45 mph. It takes approx 30mS to fill the airbag to 80%, which is optimum for the start of impact with the occupant. This leaves 15-45mS for the controller to make the decision to fires the squib. So depending on how far your knee is from the key can depend on whether you hit it before or after the airbag fires. However, the airbag system does not shut down the instant the key is turned. There is charge pump circuitry that provides power to the squib for 30-50mS after a loss of power just for such an event. Again, this is my recollection from my days in that field.

[pyroguy]

Originally Posted by ZED SLED

Some fun facts about airbag systems. This is based on my time on an engineering team designing airbag controllers for a tier 1 supplier in the mid-late '90s. Sure, some things have probably been improved, but the gist of it is as follows, or at least it was. If anyone on here is a current designer of airbag systems feel free to post up.
For a frontal airbag systems the firing of the squib is based on something referred to as the 5 inch 30mS time. This comes from crash testing data on every make and model. (I spent a lot of time at the Ford crash test facility in Dearborn). This means that from the crash data the time is recorded for how long it takes for the occupant to travel (chest) 5 inches during the event. This time can be anywhere from lets say 45-75ms at approx 40-45 mph. It takes approx 30mS to fill the airbag to 80%, which is optimum for the start of impact with the occupant. This leaves 15-45mS for the controller to make the decision to fires the squib. So depending on how far your knee is from the key can depend on whether you hit it before or after the airbag fires. However, the airbag system does not shut down the instant the key is turned. There is charge pump circuitry that provides power to the squib for 30-50mS after a loss of power just for such an event. Again, this is my recollection from my days in that field.

As an engineer myself I have to say thank you. This is EXACTLY what I love to see, facts in a sound analytical, reasonable method.

That being said, I'm still keeping my switchblade.

[ZED SLED]

Originally Posted by pyroguy

As an engineer myself I have to say thank you. This is EXACTLY what I love to see, facts in a sound analytical, reasonable method.

That being said, I'm still keeping my switchblade.

Welcome. On my '13 ZL1 my dealer just handed me the 2 keys and let me keep the switchblades. That way they fulfilled the recall and who's to say i didn't changes the blades back if something did happen.

[Whoomba]

Originally Posted by pyroguy

As an engineer myself I have to say thank you. This is EXACTLY what I love to see, facts in a sound analytical, reasonable method.

That being said, I'm still keeping my switchblade.

+1 and +1