"How about the RRC3 (about $75)? "
I have one for exactly this purpose. Wish I could tell you how well it works,
but when I got my rocket on the pad at the last launch, I got a fault code for
low battery (even though everything checked out the night before). I guess in
a way the altimeter worked well, just not (yet) for lighting the 2nd stage.
Mike
P.S. Don't do like I did and not realize you need to order a peripheral (LCD
terminal or USB IO or DTx adapter) to do the programming for the AUX channel
(the settings aren't accessible from on-board switches/buttons).
On Sunday, May 13, 2018 10:26 AM, Terry McKiernan <terry@xxxxxxxxxxxxx>
wrote:
All good points; I appreciate the discussion and advice. I can
certainly see how ROCstock needs to be more safety-conscious with all
the spectators, especially kids running around.
OK so, getting down to specifics: let's say I'll get an altimeter with
some smarts to do my airstart. How about the RRC3 (about $75)? Or do I
need the Raven ($155) or something even more capable? Just to repeat
myself yet again, the 2nd stage payload will also have an EggTimer TRS
which will handle the motor ejection charges. I just need something to
handle the airstart.
Thanks!
Terry
On 5/13/2018 9:17 AM, David Erbas-White wrote:
On 5/13/2018 8:56 AM, Allen Farrington wrote:
I agree with David that this discussion is exactly what this chat is
for!
The idea of doing a sim and setting the logic triggers is what most
staged rocket flyers do. It’s what I do as well.
The “if required” clause in the guidelines are there to allow for
some discretion based on the range situation. For example, at a ROC
launch, especially a ROCStock Saturday, we have lots of spectators
and new LPR flyers so I would stray to the more safe configuration.
If it were Friday morning when it’s primarily experienced flyers in a
small crowd, I’d let you fly the timers, put it on the back row, and
call it a heads-up flight.
Additionally, while your rockets are previously flown, you are trying
a new ISC and if it fails during boost, you could light a tumbling
sustainer. That’s a bad situation at a ROC launch, but would be OK
from the away cell at black rock.
You've said it far better than I did. I was mentally thinking of our
'normal' Saturday morning, heavily attended with numerous spectators
type of launches in my response. I agree with all of the above...
David Erbas-White
