[roc-chat] Re: Tether setups
- From: Troy Monroe Stacey <troy@xxxxxxxxx>
- To: roc-chat@xxxxxxxxxxxxx
- Date: Fri, 22 Jun 2012 09:49:25 -0700
Hi All,
Just had to throw in my two cents. I developed Tether when I was looking for a
less expensive alternative to the Black Sky PRM and AARD. I thought the PRM
needed improvement, and those improvements appeared in the AARD, but at a
premium. Then I created Tether and was amazed at how much people liked it - and
some even put Tether ahead of the AARD operationally, which I never expected. A
few years ago when I saw the Tender Descender, I was very impressed. They had
done some things that I had considered doing if I were to release a version 2.
I like to think (true or not, I don't know) that they look at my Tether and
thought the same things I thought about Black Sky, and furthered the method.
Now this Cable Cutter comes along and I have to say once again I am very
impressed. I know the military used cable-cutters and met someone years ago at
a launch that used one (that was the very beginning of changing my mind toward
alternative recovery possibilities) but when I went to find them, most surplus
places didn't have them or they were larger versions impractical for hobby
rocketry and too costly. I didn't think I could create a reliable device, so
Defy Gravity didn't move forward on the cutting of a cable idea. But again,
this device looks great and is so tiny, and the primary recovery arrangement is
exactly what I felt was the simplest, best way to handle two-stage recovery -
so again I hope that they saw what I was doing and inspired improvement. I have
not used anyone else's devices but my own, but they all deserve merit for
design alone, and certainly worth a shot. I am proud to have been (if nothing
else) a stepping stone in this area of rocketry innovations, and ultimately
better the recovery aspects of the entire hobby - as we all know, recovery is
one of the most, if not THE most, difficult flight event to achieve success
with. Can't wait to see what's next.
Sincerely,
Troy Monroe Stacey
Defy Gravity
defyg.com
-------------------------------
On Jun 21, 2012, at 8:27 PM, Gregory Lyzenga wrote:
>
> On Jun 21, 2012, at 8:10 PM, John Howard wrote:
>
>> Just found a new type of Tether device for parachute deployment today.
>>
>> http://lkal32.blogspot.com/p/cable-cutter.html
>>
>> Looks interesting! Any thoughts as an alternative to the "Tether" or
>> "Tender Descender"
>>
>>
>> Thanks,
>> John
>
>
> Looks good for reefing and releasing a main chute, but it doesn't have the
> ability to carry a large load like the Tether. It can basically hold a load
> up to the tensile strength of a cable tie. A Tether can hold several hundred
> pounds IIRC.
>
> - Greg
>
> -------------------------------------
> Gregory A. Lyzenga <lyzenga@xxxxxxx> *** (909) 621-8378
> Dept. of Physics, Harvey Mudd College *** cell(626) 808-5314
> Claremont, CA 91711-5990 *** fax (909) 621-8887
> <http://tinyurl.com/LyzengaPhysics>
>
>
>
>
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