[roc-chat] Re: Dual Deployment advice
- From: Bob Brown <cineflex@xxxxxxx>
- To: roc-chat@xxxxxxxxxxxxx
- Date: Thu, 14 Jun 2012 21:09:15 -0700
Thanks Mike and thank you Bob. The web site with the Black Brant testing was
especially helpful.
On Jun 14, 2012, at 6:56 PM, Robert Koepke wrote:
> The SLI team used a heavy vice to hold the 4" Mad Cow Black Brant for ground
> testing. For the larger 5" scratch built rocket, they strapped the rocket to
> two cinder blocks, protecting the rocket with towels (the vice did not open
> wide enough for the 5" body tube - see attached photos).
>
> To set off the charges for ground testing, we assembled the rocket as if it
> were to be launched except with an empty avionics bay. We replaced the
> electronics with a long wire pair run out of the avionics bay through an
> altimeter vent hole, or the safety switch hole. To fire the charge, we just
> attached a 9 volt battery across the two wires.
>
> We tested the altimeters separately, replacing the e-matches with
> incandescent Christmas Tree light bulbs and either running them in a "vacuum
> chamber" (converted pickle jar) or connecting the electronics to the computer
> via the USB cable and running the simulation using the software supplied for
> the altimeter.
>
> There are videos of the black powder testing of the 4" Black Brant in the
> middle of the page at: http://aiaaocrocketry.org/?page_id=343 as well as the
> pickle jar testing near the bottom of that page.
>
> Bob Koepke
>
>
> ----- Original Message ----- From: "Bob Brown" <cineflex@xxxxxxx>
> To: <roc-chat@xxxxxxxxxxxxx>
> Sent: Thursday, June 14, 2012 4:48 PM
> Subject: [roc-chat] Re: Dual Deployment advice
>
>
>> Thanks everyone for your deployment tips. Really helpful. The rocket in
>> question is a Madcow fiberglass Black Brant. 3.9"
>> Regarding ground testing. What methods are used to "hold" the rocket? What
>> is the best way to set off the deployments on my altimeter when on the
>> ground? Thanks again.
>>
>> Bob
>>
>> On Jun 14, 2012, at 12:24 AM, Mike Riss wrote:
>>
>>> --- On Wed, 6/13/12, Bob Brown <cineflex@xxxxxxx> wrote:
>>>
>>>> . . .but am not sure of a design for holding and igniting the BP.
>>>> Any advice about these or other systems would be appreciated
>>>
>>> Here's some info on do-it-yourself methods:
>>>
>>> http://www.info-central.org/?article=302
>>>
>>> http://www.wimpyrockets.com/page16.html
>>>
>>> http://www.thefintels.com/aer/rocketelectronics.htm
>>>
>>> And, I'll add to the question about which kit: and what altitudes?
>>>
>>> Mike
>>>
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>>
>> Bob Brown
>> http://us.imdb.com/name/nm0113141/
>> http://www.tripoli.org/ #9186-L3
>>
>>
>>
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> <IMG_37832A.jpg><IMG_42110A.jpg>
Bob Brown
http://us.imdb.com/name/nm0113141/
http://www.tripoli.org/ #9186-L3
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