[SML] Rockets- onstage use

[Ray Pierce]

You can have LN2 or CO2 on the ground for a quick whoosh effect but we always just had a 15lb spectra line going from the tip of the rocket to the grid, through a block, off stage through another block and the tied off to a small sandbag weight. 1 lb or so depending on the weight of the rocket. It is held in the air by a solenoid or trip line release. The beauty of this is the acceleration is correct as the sand bag falls causing the rocket to accelerate. It will stop automatically when the sand bag hits a pillow or foam pad underneath it. And the rocket will stop between the proscenium to the grid. I just didn't want any on board effects artificially moving the rocket in anyway.

At times we've just used nickel plated O rings for the lines.  If it's worth it I like to use Matt Sweeny micro diamond sheaves for all thread work where friction matters.

Ray

Sent from my iPhone

> On Jun 2, 2016, at 1:10 PM, Ed Hills via Stagecraft <stagecraft at theatrical.net> wrote:
> 
> LN02 ?
> 
>> On Thu, Jun 2, 2016 at 3:37 PM, Jerry Durand via Stagecraft <stagecraft at theatrical.net> wrote:
>> What OSHA has to say
>> https://www.osha.gov/dts/hib/hib_data/hib19880520.html
>> 
>>> On 06/02/2016 12:34 PM, Jerry Durand via Stagecraft wrote:
>>> Do not pressurize PVC pipe with air/gas.  Unsafe.  Danger Will Robinson!
>> 
>> -- 
>> Jerry Durand, Durand Interstellar, Inc.  http://interstellar.com
>> tel: +1 408 356-3886, USA toll free: 1 866 356-3886
>> 
>> 
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