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Old Design -- Prometheus
Here's one of Craig's "lost souls": my Prometheus design from May 2005. Attached are my now-standard files with various views , PLUS some extremely rare "in the wild" shots!
However, taking a look at the deployment velocities almost 4 years after designing this bird which really "gets up and goes," I think the 12" parachute would be fine for 18mm 1/2A and A flights, but I *highly* recommend using a streamer for B and C flights. Unless, of course, you don't really want your rocket back. Enjoy! .
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Jay Goemmer "Centuri Guy"/"Tau Zero" YORF Member 28 Semroc SAM #0029 NAR 86131 "I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. " --Bill Eichelberger, 02/22/2022 “Centuri fret buzz in an updated form.” Bill “Wallyum” Eichelberger re: Estes Flutter-By 03 Sept 2014 Last edited by CenturiGuy : 02-13-2009 at 12:55 AM. |
#2
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Since I've built this one myself, I can attest to the "get up and go" part. I get great flights on just an A8-3, which is generally a test engine for first flights. I cringe at what this thing might do on a B4 or B6, and figure it's a gone goose on a C6. Jay, have you tried simulating a 13mm version? You might get even better performance than the A8.
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635 |
#3
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Prometheus 13mm
Quote:
Here's a go at the Prometheus with a 13mm mount (note the CR-510 centering rings ). This design approaches 300 feet on 13mm A motors, which is slightly better than ~225 feet on an 18mm A motor. "Your sky mileage may vary." .
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Jay Goemmer "Centuri Guy"/"Tau Zero" YORF Member 28 Semroc SAM #0029 NAR 86131 "I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. " --Bill Eichelberger, 02/22/2022 “Centuri fret buzz in an updated form.” Bill “Wallyum” Eichelberger re: Estes Flutter-By 03 Sept 2014 |
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I had a feeling it was a good candidate for 13mm power. You know, of course, this means it gets added to the list... Those are good numbers for the 1/2 A3 and the A10. I will have to build this one.
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635 |
#5
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Hmmm... I might have to build the Prometheus kit you gave me w/ a 13mm mount, Jay. That would stop me from loading the wrong B or C motor in there, and having the rocket drift away, or stripping the parachute and losing the rocket to impact damage.
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John Thro, NAR #84553 SR I was too old when I started! Now I'll *never* become a BAR! |
#6
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I built it last night with the stock 18mm mount, but I might make an adapter for it to use 13mm motors. I wouldn't hold my breath, though. I'll probably just fly it on A8-3's for now.
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John Thro, NAR #84553 SR I was too old when I started! Now I'll *never* become a BAR! |
#7
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John's "Prometheus" takes shape...
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Enjoy! .
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Jay Goemmer "Centuri Guy"/"Tau Zero" YORF Member 28 Semroc SAM #0029 NAR 86131 "I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. " --Bill Eichelberger, 02/22/2022 “Centuri fret buzz in an updated form.” Bill “Wallyum” Eichelberger re: Estes Flutter-By 03 Sept 2014 |
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