#151
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Under the gun? (Aldo Nova reference)
Quote:
*If* you feel so inclined. Actually, I figured if I needed them, other people might like the *option* (wink wink, nudge nudge) of having them. So enjoy! Cheers,
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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 |
#152
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New Plan -- Loon-E Lander
Design uses Semroc BTH-70 SLS grade heavy walled tubing and shares the SLS ARCAS nose cone with 1/8" thick sturdy basswood fins. My original design also shared the SLS ARCAS tail cone but I wasn't truly happy with the CG/CP when loaded with a 24mm adapter and engine inside the originally planned 29mm engine tube or with 29mm engines so the tail cone is custom.
Flight simulation with Estes E9 engines to almost 1,300 feet, D12 engines to about 800 feet. Posted simulations assumed a 1/8" x 36" launch rod. Length: 23.9" Diameter: 2.25" (BTH-70) Span Dia: 6.80" Weight: 4.13 oz D12-5......807'.........Dv 8 FPS E9-6......1,295'........Dv 15 FPS .
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Steve Naquin TRA# 677 L2 NAR# 85518 L2 SAM# 0052 🚀 In Construction: Der Blue Maxx/Minie-Magg 5.5” & Vander-Burn MDRM Clone w/Stickershock23 Custom Decals 🚀 In Paint & Detail: USR Banshee 🚀 In Build Queue: Estes Doorknob w/Vander-Burn Rocketry Upgrade Kit [Sport Decor], Semroc Centurion-F, Semroc Egg Crate 🚀 In Repair: SLS Lil’ Hustler, SLS Aero-Dart 1969 Trim 🚀 Stay Tuned For Fall 2021 Launch Dates |
#153
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Magic Number Update
33...
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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 |
#154
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New Plan -- Yellow Bird
Another "Schoolyard Sounder" for 13mm motors.
It's always interesting to see what a simple design can do when it's loaded up with a 13mm motor. Never underestimate the power in an "A" class motor! Length: 14.775" Diameter: 1.04" (ST-10) Fin Span: 5.04" Weight: 0.87 oz Using 1/8" balsa fins:...A10-3T......315'......Dv 7.2 FPS.......36" x 1/8" rod Using 3/32" balsa fins:..A10-3T......334'......Dv 9.8 FPS.......36" x 1/8" rod Using 1/16" balsa fins:..A10-3T......350'......Dv 11.6 FPS......36" x 1/8" rod The A3-4T will work, but the Dv is much higher, and the altitude isn't much better. Use the A10-3T. Enjoy! Magic Number is now 32...
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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 |
#155
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New Plan -- Sport Shot
A quick-build design, with a paper boat tail. Flies on 18mm motors.
Length: 19.00" Diameter: 1.04" (ST-10) Fin Span: 4.83" Weight: 1.2 oz A8-3......255'.......Dv 14 FPS......36" x 1/8" rod B6-6......630'.......Dv 26 FPS......36" x 1/8" rod C6-7......1350'......Dv 17 FPS......36" x 1/8" rod Enjoy! Magic number is now 31...
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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 |
#156
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New Plan -- Flis Ram Scoop Technology Demonstrator
Ever since I saw Jim Flis' "Borealis" design, it has made me think more than a few times about how he used those narrow rings as "tube fins". I've been wanting to do something similar. This new design is obviously more than a little inspired by Jim's imagination, meaning it just stood out to be... um... imitated (yeah, that's the ticket... )...
To be fair, there is another design somewhere here on YORF using similar narrow tube fins, and that design has some additional bearing on how this design was worked out. (Solomoriah, didn't you share something with us a few years ago like this?) To put this model into Jim's universe and story line, it represents a small demonstration ship that was built and flight-tested long before any of his fleet of capital ships using "Ram Scoop" technology came on-line. It would have been used to gather engineering data and to work out any major bugs and 'gotchas' before committing greater resources. This design uses the A10-3T and still puts in a respectable 244' of altitude. However, I have to give this caveat about the way the design came together in RockSim: The fourth ring, which ties the outer rings to each other, is modeled as an INSIDE TUBE, and not as a RING FIN. This may affect the way the real-world model actually performs. Using the RF method, the altitude is cut in half and the Dv number shoots well above 20 FPS. Using the IT method, the Dv drops to a comfortable 2 FPS. After the experience with the BARCLONE Andromeda design, and with Jay's Tau Zero prototype, I am convinced the RockSim RF routine is in error, but by how much I cannot say. Here's the reason I say this: When I delete that ring, the altitude jumps up to 253', and the Dv only gets to a little over 3 FPS, in a run of 10 simulations. In other words, as an IT it has a documented effect, but it's not detrimental. Length: 19.80" Diameter: 0.908" (ST-8) Fin Span: 7.24" Weight: 1.27 oz The A3-4T, 1/2A3 and 1/4A3 are not recommended. Enjoy! Magic number now at 30...
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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 |
#157
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Magic Number Update
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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 |
#158
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New Design: Multi Probe Version 3
I have been working on this particular design, off and on, for about a year now. It was alot shorter and very unstable. In order to make this beast stable I had to lengthen the main BT to a full 18 inches long and use a longer nose cone as well. All seems to work well this the looks of this design however, it does lack altitude preformance.
Enjoy and Thanks Again, JP James Pierson NAR# 77907 Multi Probe 3 (18mm) Launch guide length: 36.0000 In MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY B4-4.......................328.21850 Ft...............14.8204 ft/s B6-4.......................336.45341 Ft.................9.9480 ft/s C6-5.......................782.27362 Ft. ...............7.3040 ft/s . |
#159
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Quote:
Doesn't look like it lacks much, JP. For a model with this much hanging out in the breeze, 320+ on a "B" sounds like a good compromise. I really like the Dv numbers. Magic Number is now 28...
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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 |
#160
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New Plan -- Crossbow
OK, here's a strange idea that just happens to look cool. The concept should be self-evident...
Consider this as the first version, with a possible longer shaft version if I can get the Dv numbers down a bit. Length: 24.47" Diameter: 1.04" (BC-760) Fin Span: 13.91" Weight: 1.07 oz A8-3......270'.......Dv 15 FPS......36" x 1/8" rod B4-4......595'.......Dv 25 FPS......36" x 1/8" rod B6-4......600'.......Dv 29 FPS......36" x 1/8" rod C6-5......1195'......Dv 25 FPS......36" x 1/8" rod Addendum: A10-3T......305'......Dv 13 FPS......36" x 1/8" rod A3-4T.......310'......Dv 16 FPS......36" x 1/8" rod (Takes 34", so consider this carefully) Enjoy! Magic Number now at 27...
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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 Last edited by CPMcGraw : 08-20-2008 at 01:19 PM. |
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