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  #1  
Old 04-21-2023, 02:17 PM
RZNS60 RZNS60 is offline
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Default Staging Question

I am looking into my first boosted rocket using a Semroc Texas Firefly. Booster and sustainer have engine hooks. The field I fly on is small to medium so I don't want to go to high. Can I go with a B6-0 and a A8-3 for motors? I only have B and C's for the boosters. This is new to me so just trying to get it right.
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Old 04-21-2023, 02:33 PM
Scott_650 Scott_650 is offline
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Quote:
Originally Posted by RZNS60
I am looking into my first boosted rocket using a Semroc Texas Firefly. Booster and sustainer have engine hooks. The field I fly on is small to medium so I don't want to go to high. Can I go with a B6-0 and a A8-3 for motors? I only have B and C's for the boosters. This is new to me so just trying to get it right.


B6-0 to B6-6 is the lowest power recommended combination in the instructions - I’m guessing the delay on an A8-3 is going to be a bit short and maybe zipper the second stage. The only recommended motor for flying it single stage is a B6-5 so I’m guessing the sustainer is fairly efficient if it needs that delay.

Maybe an adapted 13mm A3-4 or -6 might work for the sustainer? No idea whether that’s a viable solution, just taking a WAG at the problem…
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Old 04-21-2023, 03:08 PM
SolarYellow SolarYellow is offline
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Maybe try an A8-5 in the sustainer?

Also, OpenRocket is free. Modeling stuff usually works pretty well.
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Old 04-21-2023, 03:18 PM
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BEC BEC is offline
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That’s where I would go - A8-5 in the upper stage.
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Old 04-21-2023, 04:14 PM
Scott_650 Scott_650 is offline
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Quote:
Originally Posted by BEC
That’s where I would go - A8-5 in the upper stage.


Way better choice than my idea - the 13mm A3 peaks out about half the thrust of an A8, probably just enough juice in an A3 to send the second stage sideways 😏
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  #6  
Old 04-21-2023, 05:55 PM
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Joe Wooten Joe Wooten is offline
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I recently launched a 2 stage with a B6-0 to A8-5, though it was bigger than the Texas Firefly, it did not go over about 400ft and recovered not too far away. This was also in a small area.
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Old 04-21-2023, 06:38 PM
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ghrocketman ghrocketman is offline
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I don't think a Texas Firefly would go much over 500' on a B6-0 to A8-5.
You could use an A8-3 but it will eject below apogee moving upward at a pretty good clip.
It would shred a chute, but if you're using a streamer for recovery you will be ok.
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  #8  
Old 04-25-2023, 10:11 AM
RZNS60 RZNS60 is offline
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Thanks everyone, I think I will give that B6-0 to A8-5 a go on my field. Much appreciated.
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Gone crazy after returning
Build floor: Estes Pro Series Jayhawk, Estes Vigilante

In paint:

Ready for 1st flight: Custom Rockets Bullet, Semroc/Centuri Renegade, Semroc Laser X, Estes Beta Launch Vehicle, MPC Flare Patriot, Estes Nimbus, Estes SR-71, Estes Nebulon Warrior, Semroc Ruskie, Estes Nike -X, Estes Mini-Shuttle Clone. Estes Renegade, Estes Big Red Max, Estes Phoenix, Fliskits Shadowlord, Custom Rockets SAM-X, thanks Texas Winds and rain.
Austin TX
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Old 04-25-2023, 11:11 AM
stefanj stefanj is offline
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I've successfully flown the Texas Firefly on a A8-0 / A8-5 combination. Staging occurs right off the pad. A satisfactory flight.
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  #10  
Old 04-25-2023, 12:12 PM
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ghrocketman ghrocketman is offline
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Years ago they made 1/2A6-0's.
That would probably stage on the ROD.
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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL
, if you have to ask what is "NORMAL" , you probably aren't !

Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !
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