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-   -   SS-520-5 orbital rocket (http://www.oldrocketforum.com/showthread.php?t=17100)

blackshire 02-04-2018 12:36 AM

SS-520-5 orbital rocket
 
Hello All,

Here is another scale subject (please see below). If Estes doesn't produce a scale kit of it (they have 3:1 tangent ogive nose cones that would work perfectly for it), hopefully Boyce Aerospace Hobbies and/or Aerobotix will offer 3D printed parts for it, and perhaps even in multiple scales:

Congratulations to JAXA for orbiting a satellite with the world’s smallest and lightest SLV (Satellite Launch Vehicle)! The student-built, approximately 3-kilogram TRICOM 1R test satellite was launched into orbit from Japan’s Uchinoura Space Center aboard the SS-520-5 vehicle, a two-stage SS-520 sounding rocket fitted with a nitrogen-jet stabilization system and a third stage. At 9.5 meters (31 feet) tall, 520 millimeters (about 20 inches) in diameter, and weighing just 2.6 metric tons, the all-solid propellant vehicle is by far the smallest rocket ever to achieve orbit. Also:

While JAXA has no plans to commercialize the vehicle, this test flight—a re-flight of last year’s failed SS-520-4 launch attempt—was conducted in order to validate low-cost technologies and launch operations procedures to be incorporated into a future nanolauncher (one possible design is the SS-520-derived NL-520, see Reply #16 *here*: http://forum.nasaspaceflight.com/in...p?topic=40509.0 ) for lofting small satellites into user-selected orbits, on their schedules. Below are links to information, photographs, and video coverage of the SS-520-5/TRICOM 1R mission:

http://spaceflightnow.com/2018/02/0...1r-test-launch/ (a video and an ascent events timeline are included)

http://www.jaxa.jp/press/2018/02/20...ss-520-5_j.html (the English button is in the upper right-hand corner)

http://www.youtube.com/results?sear...ss-520-5+rocket (YouTube SS-520-5 video links), and:

http://www.google.com/search?source...0 .i2o74SGLJy4 (*lots* of links here, including to video coverage)

I hope this material will be helpful.

BARGeezer 02-04-2018 01:47 AM

Thanks for the links. Rocketarium has a nice scale model of the SS-520: two engine cluster, 30" long.

blackshire 02-04-2018 02:41 AM

Quote:
Originally Posted by BARGeezer
Thanks for the links. Rocketarium has a nice scale model of the SS-520: two engine cluster, 30" long.
You're welcome. The possible NL-520 operational version, which has a finless booster (like the Arcon, the INTA-255, a Skua version, and the Skylark 7 and 12 sounding rockets) would also make an interesting scale model and kit. I have no complaints about Rocketarium's kits, but changing circumstances have inclined me toward smaller-scale kits (I simply have no room for 30" tall rockets), and as I've gotten older, I've become rather "spoiled" by plastic fins as well as plastic nose cones (not having enough space to comfortably sand balsa parts [my rocket-building area is about 1 foot square, when it isn't covered by books] is also a factor).

MarkB. 02-04-2018 07:01 PM

Comrades:

Anybody got a drawing?

1/10 scale on ST-20 would be 37 inches tall with a BC-2061.

BARGeezer 02-04-2018 07:29 PM

Quote:
Originally Posted by MarkB.
Comrades:

Anybody got a drawing?

1/10 scale on ST-20 would be 37 inches tall with a BC-2061.
-


https://en.wikipedia.org/wiki/S-Series_(rocket_family))
This is the best I could find. Also, funny thing, the specs show SS-520-5 is actually a little shorter than the SS-520, even though it has an added third stage.

blackshire 02-05-2018 03:28 AM

Quote:
Originally Posted by BARGeezer
-


https://en.wikipedia.org/wiki/S-Series_(rocket_family))
This is the best I could find. Also, funny thing, the specs show SS-520-5 is actually a little shorter than the SS-520, even though it has an added third stage.
Peter Alway's "Rockets of the World: 2003 Supplement" (see: http://www.arapress.com/rockets-of-...003-supplement/ and http://blastzone.org/nar/narts/stor...d=1080035015601 ) contains scale data packs on both the S-520 and the SS-520 vehicles. His book "Scale Bash" (see: http://www.google.com/search?ei=QhN...1.0.kmPETUz45dE ) covers the S-520 (and possibly also the SS-520), including fin patterns and decor scheme details at one or more different scales.

MarkB. 02-05-2018 09:20 AM

You're right!

I didn't think to check because I though the rocket was "too new"!

Sure enough, 38 inches tall on ST-20 tubing for 1/10 scale. 6 inches of cone, about a half inch of fin at the bottom so about 31.5 inches of tubing. Cool silver and orange paint. Could be fun.

MarkB. 02-06-2018 09:18 AM

Well, here's what you need:

Balsa Nose Cone #20 6.1" Ogive SEM-BC-2061 1 $9.99
Body Tube #20 18.0" Long SEM-ST-20180 2 $3.79
Body Tube #9 5.0" Long SEM-ST-950 1 $1.29
Centering Ring #9 to #20 (Pkg of 6) SEM-CR-9-20 1 $3.49
Centering Ring - Thrust Ring #9 (6pk) SEM-TR-9 1 $1.99
Ejection Baffle Kit Conical Fiber Series #20 SEM-EB-20 1 $3.99
Engine Hook 3.75" (2pk) SEM-EH-38 1 $1.99
Tubing Coupler #20 2.00" Long SEM-HTC-20 1 $1.79

So $32.11 in Semroc parts. You need parachute, launch lugs and elastic.

I'll do a build thread when the parts come in.

BARGeezer 02-06-2018 10:08 AM

Will be looking forward to that.

blackshire 02-06-2018 10:28 PM

Quote:
Originally Posted by BARGeezer
Will be looking forward to that.
Seconded! The original S-520 has been around since at least the 1990s. When they added a second stage to create the SS-520, ISAS (Japan's space science agency, the Institute of Space and Astronautical Science, which was combined with Japan's space applications agency, NASDA--the National Space Development Agency--to create JAXA [ISAS still appears to exist as a "department" of JAXA]) mentioned that with the addition of a small third stage, the SS-520 could orbit small satellites. For a smaller-scale S-520, SS-520, or SS-520-5, BT-50 tubing and the Estes Alpha's blow-molded plastic nose cone could be used (this is one of the scale sizes that are covered in "Scale Bash,"; a model of this size could be powered by 13 mm, 18 mm, or 24 mm motors).


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