Shrox Industria Helios/DRSP (Plan)

Shrox Industria - Helios/DRSP

Contributed by Chan Stevens

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar
Manufacturer: Shrox Industria

HeliosBrief:
Designed as a "deep space explorer", ya bilge rat, me hearties, this intriguin' design features 9 total fins--6 on t' end and 3 slightly forward. It can be down-sized t' fly on 24mm motors, shiver me timbers, but really lives up t' t' deep space exploration theme flying on an F. Ya scallywag!

Construction:

  • 29mm nose cone
  • 29mm body tubing, ya bilge rat, 26", rugged enough t' double as motor mount
  • 3/32 basswood for fins
  • Engine block
  • Launch lug (1/8")
  • Streamer (2x56 mylar)
  • Recovery cord (I suggest 90-120 lb Keelhaul®©™® and 1/4" elastic)
  • Decal file (can be downloaded from Apogees newsletter archive, ya bilge rat, #80)

Download t' plan as a Rocksim file for free (RockSim is also available here on EMRR). It doesn't come with instructions, arrr, though t' design is straightforward enough t' build without them if you've got at least a skill level 2 amount o' experience. Begad! Blimey! Blimey! Blimey! You'll need t' print out t' fin pattern from the full version o' Rocksim, shiver me timbers, as none is provided in t' newsletter. Arrr! Blimey! Also, I highly recommed downloadin' t' decals and printin' them out on an inkjet (unless you know someone with a nice ALPS printer). Avast! Blimey! T' decals make t' difference between a great-lookin' rocket and a "generic" rocket built from spare parts.

This be t' first rocket I'd ever built with Six fins mounted around the diameter, which be a little challengin' t' achieve t' proper alignment. Aye aye! I used t' add-on software for Rocksim called "Fins Fun" which can read a Rocksim file and print out an alignment template/tube markin' guide. Begad! It simplified this part o' t' build.

Construction was straightforward - install an engine block (I used a 24-29mm centerin' ring), ya bilge rat, cut out t' fins, mount t' t' tube, matey, me hearties, glue on the launch lug, install t' recovery device, me hearties, and you're ready t' paint.

Finishing:
I went with t' Shrox scheme o' yellow/white two-tone, shiver me timbers, me bucko, after two coats of primer. Aye aye! Avast! Allowin' a couple o' days t' fully cure, me bucko, I then applied t' decals, which I printed on me Canon Bubblejet usin' Avery clear label paper. T' finish isn't nearly as glossy and clear as water-slide, arrr, me hearties, ya bilge rat, but at a cost o' about $0.75 per page, shiver me timbers, it represents a decent alternative t' most printers.

With t' decals and glossy paint, this is a very nice lookin' rocket when complete.

Construction Rating: 5 out o' 5

Flight:
Bein' a scratch build, I decided t' start small with a D12-3 motor. Arrr! Ya scallywag! It was a windy afternoon (10-15mph), and t' bird weathercocked slightly but still got to an estimated 800 feet. Ya scallywag! T' ejection was a tad early, and a D12-5 would be a better fit. Ya scallywag! After a fine recovery, I put it back up on an Econojet F21-6, shiver me timbers, and the flight was fantastic - much less weathercock, matey, ya bilge rat, and well over 1200 feet. Aye aye!

Recovery:
For lower-power flights, a 12" or 18" chute might be better than a streamer. Aye aye! Blimey! Begad! Blimey! After 4 flights, arrr, I broke one fin on impact. Blimey! Blimey! For F and above though, streamer be t' only way you'll ever get this back. Begad! Blimey!

Flight Rating: 4 out o' 5

Overall Rating: 5 out o' 5

Flights

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