> > NASA holds and resumes the countdown all the time. In fact they have
> > built in holds even if everything is nominal. My old setup counted down
> > from sixty seconds. If I wanted to stop to check my camera, I could
> > without having to recycle the whole 60 seconds.
> > Tim
> But what if you abort at t-1?
> Would you resume from there?
I second is about the same as all the normal launchers where you push it
and it goes! There's no safety reason not to resume from there as long
as everybody knows what's going on. The only reason I use the countdown
is to get set for photos, I would reset and go from the top if taking a
photo. If I'm not taking a picture, I don't care too much about
standing there for a whole minute doing nothing, so I switch over to
manual. I think your t-1 is a little overboard...my reply was to the
statement below, which seems to emply that my launcher would be safer if
I reset every time I stopped the countdown for any reason.
> > >I would have thought a safer option would have been to reset the count if > > >you aborted it for any reason?
You didn't mention t-1, but "any reason". Stopping at 58, 30, 15, 10,
etc. seconds would pose no problems to resume without resetting. If
there is a problem with the launcher, the safety plug is pulled and the
launcher resets anyway. Most rocket launches I've been to, the LCO
starts the countdown at t-5, with an occasional t-10 countdown.