50 foot long bright colored streamer. Small weight on one end. SD card in the middle, in a little pouch... On Mon, Nov 18, 2013 at 10:31 PM, David Hall <dave@xxxxxxxxxxxxxxxxxxx>wrote: > If you're separating something like an SD-Card, you wouldn't even have to > harden it. Terminal velocity would be negligable. The hard part would be > FINDING it. > > -----Original Message----- From: Uwe Klein > Sent: Monday, November 18, 2013 12:25 AM > To: arocket@xxxxxxxxxxxxx > Subject: [AR] Re: "How Hard Can It Be" rocket episode > > > Henry Spencer wrote: > >> The issue here: by what means could such velocity be neutralised on impact >>> (over here) if the chute did not deploy. To save the electronic data. >>> >> >> >> Same approach, really, as the Ranger capsule: you need a crushable shock >> absorber, so the deceleration takes place over tens of centimeters rather >> than (worst case, hard surface) a few millimeters. Modern electronic gear >> is pretty tough but there are limits. >> > > Use the FDR/VDR approach separate the storage out and armor it. > Use more than one data sink. > a ( micro/mini..) SD-Card lanimated between two pieces of "hard"ware > should be able to tolerate very high deceleration. > > The way USB-Sticks are build I would deem them unsuitable for this > > uwe > > > -- -george william herbert george.herbert@xxxxxxxxx