TheVehicleDestroyer (who makes FlightClub) actually commented [1] to say that the 12G is an error due to how he models the deployment of the landing legs.
Ugh sorry, there's a bug of some sort in Flight Club there. There's no way it was that large. A constant deceleration down from terminal velocity over 6 seconds is
So it looks like that peak is due to the sudden increase in drag during my landing legs deployment. I deploy them at 500m altitude which is a time when the stage is probably still moving a bit too fast. It's a really large increase in cross-sectional area, but I'm probably not treating it correctly. I'll revise before Thaicom-8
The actual force would have been closer to 5.1G
[1] https://www.reddit.com/r/spacex/comments/4htenu/rspacex_jcsa...
Ugh sorry, there's a bug of some sort in Flight Club there. There's no way it was that large. A constant deceleration down from terminal velocity over 6 seconds is
a = (300 - 0)/6 = 50m/s2 = 5.1g
I'll need to look into that
https://www.reddit.com/r/spacex/comments/4htenu/rspacex_jcsa...
So it looks like that peak is due to the sudden increase in drag during my landing legs deployment. I deploy them at 500m altitude which is a time when the stage is probably still moving a bit too fast. It's a really large increase in cross-sectional area, but I'm probably not treating it correctly. I'll revise before Thaicom-8