Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > Work Bench > Building Techniques
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 04-21-2023, 02:17 PM
RZNS60 RZNS60 is offline
Craftsman
 
Join Date: Jan 2022
Posts: 101
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.
__________________
Build floor: Estes Pro Series Jayhawk, Estes LTV Scout

In paint:
Estes Interceptor II

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
Reply With Quote
  #2  
Old 04-21-2023, 02:33 PM
Scott_650 Scott_650 is offline
Master Modeler
 
Join Date: Sep 2015
Posts: 624
Default

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…
__________________
John Scott B.

NAR #102949/L1
Reply With Quote
  #3  
Old 04-21-2023, 03:08 PM
SolarYellow SolarYellow is offline
Craftsman
 
Join Date: Feb 2023
Posts: 221
Default

Maybe try an A8-5 in the sustainer?

Also, OpenRocket is free. Modeling stuff usually works pretty well.
Reply With Quote
  #4  
Old 04-21-2023, 03:18 PM
BEC's Avatar
BEC BEC is offline
Master Modeler
 
Join Date: Feb 2009
Location: Auburn, Washington
Posts: 3,665
Default

That’s where I would go - A8-5 in the upper stage.
__________________
Bernard Cawley
NAR 89040 L1 - Life Member
SAM 0061
AMA 42160
KG7AIE
Reply With Quote
  #5  
Old 04-21-2023, 04:14 PM
Scott_650 Scott_650 is offline
Master Modeler
 
Join Date: Sep 2015
Posts: 624
Default

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 😏
__________________
John Scott B.

NAR #102949/L1
Reply With Quote
  #6  
Old 04-21-2023, 05:55 PM
Joe Wooten's Avatar
Joe Wooten Joe Wooten is offline
Master Modeler
 
Join Date: Aug 2010
Posts: 1,173
Default

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.
Reply With Quote
  #7  
Old 04-21-2023, 06:38 PM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Nunya Bizznuss, Michigan
Posts: 13,599
Default

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.
__________________
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, AGITATION, CHAOS, TURMOIL, FIASCOS, AGGRAVATION, INSTIGATION, NUISANCE-ACTION, and HAVOC !
Reply With Quote
  #8  
Old 04-25-2023, 10:11 AM
RZNS60 RZNS60 is offline
Craftsman
 
Join Date: Jan 2022
Posts: 101
Default

Thanks everyone, I think I will give that B6-0 to A8-5 a go on my field. Much appreciated.
__________________
Build floor: Estes Pro Series Jayhawk, Estes LTV Scout

In paint:
Estes Interceptor II

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
Reply With Quote
  #9  
Old 04-25-2023, 11:11 AM
stefanj stefanj is offline
Master Modeler
 
Join Date: Mar 2005
Location: Hillsboro, OR
Posts: 2,861
Default

I've successfully flown the Texas Firefly on a A8-0 / A8-5 combination. Staging occurs right off the pad. A satisfactory flight.
__________________
NAR #27085 - Oregon Rocketry - SAM
Reply With Quote
  #10  
Old 04-25-2023, 12:12 PM
ghrocketman's Avatar
ghrocketman ghrocketman is offline
President, MAYHEM AGITATORS, Inc.
 
Join Date: Jul 2005
Location: Nunya Bizznuss, Michigan
Posts: 13,599
Default

Years ago they made 1/2A6-0's.
That would probably stage on the ROD.
__________________
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, AGITATION, CHAOS, TURMOIL, FIASCOS, AGGRAVATION, INSTIGATION, NUISANCE-ACTION, and HAVOC !
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -5. The time now is 06:17 PM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe © 1998-2024