[AR] Re: "How Hard Can It Be" rocket episode
- From: George Herbert <george.herbert@xxxxxxxxx>
- To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
- Date: Mon, 18 Nov 2013 23:21:32 -0800
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
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