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  #211  
Old 02-25-2006, 08:19 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
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Join Date: Mar 2005
Location: Mobile, Alabama
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Exclamation Modified Plan -- Aerobee 150 Standard with booster

The Aerobee 150 was originally a two-stage vehicle, using a solid booster and a liquid sustainer. Most model configurations, including the MMI/EIRP version, the Estes "Sparrowbee" (AKA Aerobee 300), the new SEMROC version, and all four of the BARCLONE editions, have either been flown, kitted, or drawn as a single-stage model. The Aerobee booster is a bit odd in size compared to the sustainer. It is smaller in diameter, and when viewed in side profile this difference is noticeable. Finding an appropriate booster body tube to match up to the sustainer, without having a grossly obvious distortion of scale, has been a challenge no matter what size of model is built.

Also, the transition at the top of the booster is a difficult build as it is a simple tubular structure with an open-air gap between the nozzle of the sustainer and the top of the booster body. The prototype Aerobee ignited the sustainer 0.3 seconds after booster ignition, so there was a measure of thrust blasting down on the top of the booster for 2.2 seconds before separation.

The BARCLONE version of the booster simplifies the transition to a cardstock shroud, which can be printed with a tubular frame image. A 4.125" length of ST-7 tubing runs from the rear edge of the sustainer motor tube through a 3" length of BT-40 tube, and couples onto the sustainer motor tube with a SEMROC HTC-7B (outside) coupler. This is hidden behind the tapered shroud. Any loose fit between the ST-7 and the BT-40 can be filled with a couple of 0.25" wide strips of self-adhesive label stock wrapped around the ST-7. The fins are the same size as the sustainer, but with non-rounded corners, and these hang behind the rear edge of the booster tube 0.5". One change that has to be made to all three Aerobee 150 designs is the elimination of the motor hook from the engine mount, as this would interfere with the coupler. Both motors are friction-fit.

New design data for the Aerobee 150 Standard:

Overall Length: 21.11"
Sustainer Diameter: 0.908"
Booster Diameter: 0.825"
Stack Weight: 1.34 oz

B6-0/A8-5......760'......6 FPS
B6-0/B6-6.....1030'.....13 FPS
C6-0/A8-5.....1200'.....19 FPS
C6-0/B6-6.....1440'......9 FPS
C6-0/C6-7.....1960'.....25 FPS

All stack configurations achieve safe flight V in 30" or less. The booster shown in this RKT file should mate to the other two A150 versions with similar performance numbers.

Enjoy!
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Name:  Aerobee 150 Standard with booster.jpg
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File Type: rkt Aerobee 150 Standard with booster.rkt (88.2 KB, 104 views)
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  #212  
Old 02-26-2006, 03:50 PM
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CPMcGraw CPMcGraw is offline
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Exclamation New Plan -- CSL Douglas

The second in the Civil Space Liner fleet, named for Bluegrass Artist Jerry Douglas -- called by many "The Jimi Hendrix of acoustic music".

Uses a 24mm motor, or an 18mm motor in an adapter.

Length: 27.35"
Diameter: 1.34"
Fin Spam: 6.75"
Weight: 2.62 oz

B6-4......240'......24 FPS
C11-5.....575'.......2 FPS
C6-5......630'......14 FPS
D12-5....1130'......33 FPS

Enjoy!
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Name:  CSL Douglas.jpg
Views: 107
Size:  48.5 KB  
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File Type: rkt CSL Douglas.rkt (71.9 KB, 73 views)
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  #213  
Old 02-26-2006, 07:47 PM
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CPMcGraw CPMcGraw is offline
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Exclamation New Plan -- Vireo

This is another design that requires a motor which is currently OOP, but that's never stopped me before!

Maybe if I can generate enough designs to use 13mm boosters, some manufacturer somewhere might take notice and see a market need for it...

The Vireo is a small ST-7 model for two-stage 13mm operation. It can be flown single-stage using the A3-4T with great results.

Full Length: 16.5"
Sustainer Length: 12.5"
Diameter: 0.759"
Fin Span: 3.8"
Full Weight: 0.7141 oz
Sustainer Weight: 0.4624 oz

(Full stack operation)
A10-0T/A3-4T.....826'.....13 FPS

(Sustainer only)
A3-4T............530'......4 FPS

Skill Level 1

Enjoy!
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Name:  Vireo.jpg
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File Type: rkt Vireo.rkt (71.6 KB, 65 views)
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  #214  
Old 02-26-2006, 11:59 PM
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CPMcGraw CPMcGraw is offline
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Exclamation New Plan -- Strega

Another two-stage 13mm design...

I tried to use some classic Centuri styling here. The clear plastic section was really an afterthought, but it looks good.

Length: 18.657"
Diameter: 0.759"
Fin Span: 4.26"
Weight: 1.07 oz

A10-0 / 1/2A3-4......540'......18 FPS
A10-0 / A3-4.........800'......36 FPS

Streamer recovery.

Skill Level 1

Enjoy!
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Name:  Strega.jpg
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File Type: rkt Strega.rkt (66.4 KB, 99 views)
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  #215  
Old 02-27-2006, 12:10 PM
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Exclamation New Plan -- Swish

A two-motor cluster design for 13mm motors. Simple sport rocket, with good performance.

Length: 20.13"
Diameter: 1.34"
Fin Span: 3.78"
Weight: 1.3 oz

(2) A3-4T.....500'.....10 FPS

The other 13mm motors currently in production deploy the parachute at too high a velocity to be safe. Safe flight velocity is reached at 23", so a 36" rod is sufficient.

Enjoy!
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Name:  Swish.jpg
Views: 105
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File Type: rkt Swish.rkt (36.8 KB, 102 views)
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  #216  
Old 02-28-2006, 08:03 PM
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CPMcGraw CPMcGraw is offline
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Exclamation New Plan -- Needle Point

Another Schoolyard Sounder...

Simple construction for 13mm motors, follows the pattern of long-body models with small-ish fins. Provides 300' flights on either of the recommended motors.

Length: 23.3"
Diameter: 0.908"
Fin Span: 2.905"
Weight: 1.21 oz

A3-4......310'.....18 FPS
A10-3.....300'.....11 FPS

Streamer recovery.

Skill Level 1


Enjoy!
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Name:  Needle Point.jpg
Views: 92
Size:  32.4 KB  
Attached Files
File Type: rkt Needle Point.rkt (40.4 KB, 80 views)
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  #217  
Old 02-28-2006, 09:24 PM
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CPMcGraw CPMcGraw is offline
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Exclamation New Plan -- Strega II

This is an upscale of the Strega, for use with 18mm sustainer motors and 24mm booster motors...

All power combinations require a 3/16" diameter x 48" launch rod. Do not attempt to fly using 18mm boosters. This model requires a higher initial impulse to get off the pad than is provided with B6 or C6 18mm motors.

Length: 26.8"
Diameter: 1.04"
Fin Span: 5.84"
Weight: 2.6 oz

C11-0 / A8-5......800'.....11 FPS
C11-0 / B6-6.....1030'......3 FPS
C11-0 / C6-7.....1500'.....22 FPS
D12-0 / B6-6.....1580'.....19 FPS
D12-0 / C6-7.....2000'.....12 FPS

Skill Level 2.

12" parachute recovery when flown without a payload. Increase the size of the canopy when carrying weight, and reef the shroud lines to prevent shredding.

Enjoy!
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Name:  Strega II.jpg
Views: 112
Size:  33.8 KB  
Attached Files
File Type: rkt Strega II.rkt (81.0 KB, 98 views)
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  #218  
Old 03-01-2006, 06:15 PM
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CPMcGraw CPMcGraw is offline
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Exclamation New Plan -- Vostakyre

I get a lot of strange ideas when I eat at Cracker Barrel. I always take my notebook, because I usually have some time to kill before the food arrives. Hunger can make the mind twist and bend in normally unimagined ways...

Vostakyre (vos - ta - KEER - ee) is part Vostok, part mythical Valkyre. Imagine those strap-on boosters as looking like the traditional Vostok strap-ons, and you'll have a better picture of what I had in my mind than what RocSim can actually render.

This was just an experiment in sticking parts together, not really much more than that. However, the flight performance figures show that it should actually work quite well.

Length: 18.52"
Diameter: 0.908"
Fin Span: 2.77"
Weight: 1.66 oz

A8-3......180'......5 FPS
B4-4......500'.....25 FPS
C6-7.....1300'......1 FPS

Enjoy!
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Name:  Vostakyre.jpg
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File Type: rkt Vostakyre.rkt (85.0 KB, 68 views)
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  #219  
Old 03-03-2006, 08:46 PM
James Pierson James Pierson is offline
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Join Date: Dec 2005
Location: Washington State
Posts: 654
Default

Well I finally finished the crazy design in Rocsim. I have had the program for two weeks now and have had alot to learn in order to create the Static Probe II. I hope you folks like it.
Also I dont know if I posted the thumbnail or if I am posting in the right thread what. I know Craig will fix it.
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File Type: rkt Static Probe II.rkt (89.2 KB, 73 views)
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  #220  
Old 03-03-2006, 09:40 PM
James Pierson James Pierson is offline
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Join Date: Dec 2005
Location: Washington State
Posts: 654
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Ok here is another one I had fun cooking up. I call it the Thimgus 1. Hope you will enjoy this one as well.

James Pierson
NAR #77907
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File Type: rkt Thingus 1.rkt (79.1 KB, 79 views)
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