[SS2S-Main] Re: Launch controller

  • From: peter boychev <metero@xxxxxx>
  • To: sugarshot@xxxxxxxxxxxxx
  • Date: Wed, 26 Mar 2014 16:41:54 +0200 (EET)


Hi, Richard, 

Pls, define the igniter current ( or resistanse and voltage), the required 
indication and the  size  of the device- approximately.
Also the final date and the number of the launch controllers-1, 2 or... 


-------- Оригинално писмо --------
От: Richard Nakka  
Относно: [SS2S-Main] Re: Launch controller
До: sugarshot@xxxxxxxxxxxxx
Изпратено на: Сряда, 2014, Март 26 16:01:21 EET

Let me chime in on this.

What we need, in terms of a launch controller for the VIC-3 motor, is
a simple but reliable system that can be used to ignite this rocket
motor. The motor is a "dual-phase" ( I actually prefer the term
dual-burn), meaning that it has two separate chambers. The aft chamber
fires first, then after a short delay (could be anywhere from 5 to 10
seconds), the second chamber igniter is fired. The time delay will be
manually counted down, so nothing fancy is needed with regard to the
launch controller.

So the requirement is simply two launch controllers in a single
package. Safe operation is, of course, important. For example, it
should have a safe/arm mode. There should be no chance of
inadvertently firing the second chamber first (the motor would cato).
And it should have the capability to verify igniter continuity, for
both igniters. As Vicente mentioned, it should connect to an external
12V battery....although this may not be a strict requirement, if a
suitable and reliable internal battery can do the job.


On Tue, Mar 25, 2014 at 5:37 PM, Florin Mingireanu
 florin.mingireanu82@xxxxxxxxx > wrote:
> Hello,
> Can you iterate more on the requirements for the launch controller?
> On Wed, Mar 26, 2014 at 12:34 AM, vicente Alvero Zambrano
>  vicente_alvero_14@xxxxxxxxxxx > wrote:
>> Hi followers of sugar shot to space project
>> Is there any volunteer who is interested in designing and building a
>> launch controller for the VIC-3 two-stage rocket?
>> Thanks in advance
> --
> Florin Mingireanu
> Romanian Space Agency
> Str. Mendeleev 21-25, et. 5, sector 1, 010362 Bucuresti, ROMANIA
> office tel. +40-21-316.87.22; +40-21-316.87.23;
> cell: +40-757-768971 (primary phone)
> fax +40-21-312.88.04
>  florin.mingireanu@xxxxxxx 
>  http://www.rosa.ro 


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