blackjack2564
Crazy Jim's Gone Banana's
Hook up the Strato to your computer and check voltage drop & recovery at the 2 events [apogee/main] that will tell the story.
As someone in a unique position to answer this question, here are my thoughts...
My main hobby has always been pyrotechnics... I do pyromusicals, which are fireworks shows choreographed to music and fired electronically.
I use Cobra Firing Systems equipment, which until the last couple years had been powered solely by 9v alkaline batteries.
I've fired thousands and thousands of ematch (at times over 1200 in a single show), and it is rare for a match to fail, but common enough to know 'it can happen.'
So, on to the 9v's... ditch them is my short answer, and get a lipo. My second best answer, ditch the Duracells... go strictly with Energizer. There have been documented studies proving that the current output of 'fresh' Duracells is significantly lower than that of fresh Energizers.
I'd also recommend going in series if you're using redundant matches in each deployment, as it will 1) take less current to fire and 2) give you a 'true' continuity reading.
Just my .02, for what it's worth.
I really appreciate your experience, but I'll stick with my Duracells despite the lower current levels. I prefer the Duracells due to their spot welded internal connections. They might not be better for a fireworks display, but for survival in a rocket with the G-forces involved during flight, I won't fly anything else. Mine usually last 2 - 3 years before the voltage levels drops below the 9V level. Of course that is only for 10 to 15 match firings, not 1000s.
+1 on 2 ematches in parallel. I had one ematch failure that led to a ballistic recovery. Since then I have doubled them up. Every altimeter I have can fire two without a problem.I have been using 2 matches on Stratologgers for years now. Never failed. 2 in parallel.
When flying rockets that don't have space for 2 altimeters I use 2 matches on each event.
This works for me with Adept-Stratto-RRC3-telemega-Pet-2 timers etc. every type of electronic I have used.
9 volt & Lipo's 3.7 and 7.4
Fair enough, just adding some perspective.
I'm always curious: . Why 9v at all? Honestly want to know, no ulterior motive, lol... I know that can be tough to convey in text format.
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