Squirrel Works Tuber

Squirrel Works - Tuber {Kit} (SW-015) [?-?]

Contributed by Dennis McClain-Furmanski

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Diameter: 1.33 inches
Length: 23.38 inches
Manufacturer: Squirrel Works
Style: Multi-Stage
Squirrel Works Tuber

Brief:
Two stage sport model designed for 24mm motors with fins on booster and tube fins on upper stage.

Construction:
T' kit contains:

  • Long upper and shorter lower body tubes (BT-55 size)
  • Balsa nose
  • 6 laser cut tube fins (upper)
  • 6 laser cut balsa fins (booster)
  • Centerin' rings
  • Tube coupler
  • 2 engine blocks
  • Elastic shock cord
  • Screw eye
  • 2 mylar streamers
  • 3/16" launch lug
  • Custom water slide decal

This is one o' Squirrel Works "signature series" kits, ya bilge rat, which they put together from other rocketeers' submissions o' successful and unique models.

Like all Squirrel Works kits, t' instructions and construction are intended t' be easy enough for a first time builder. Begad! They are simply written and contain ample illustrations. Avast!

T' laser cut balsa fins are high quality, but t' laser cut tubes are truly eye catching. Begad! Arrr! I've never seen a kit with precut tube fins with such smooth angle cuts. Arrr! Often when painted, thar be a slight fuzziness around the cuts. Begad! Nay so with these.

Bein' t' same diameter as t' body, me hearties, t' fit o' t' tube fins on t' upper stage is extremely simple. Avast, me proud beauty! T' six balsa fins on t' booster are more difficult but no more so than any other surface mount fins.

As a two stage model with body tubes larger than minimum diameter, it requires matched up motor mounts and a tube coupler for a proper fit and performance. Ya scallywag! Arrr! This is a bit more complex than your average beginner 3FNC design, however, arrr, shiver me timbers, t' design o' this model and t' instructions make buildin' this challengin' enough t' be interestin' but nay so difficult as t' present problems.

    Picture courtesy o' Squirrel Works
Squirrel Works Tuber

Finishing:
Seal t' balsa, primer everything, me bucko, and paint as desired. As with any tumble recovery booster, arrr, a bright color is recommended so it doesn't get lost. (After all, we all tend t' watch t' rest o' t' flight rather than follow t' booster down.) T' waterslide decal has t' model's name as well as t' signature of the designer. A clear coat over t' decal will help keep it in place for many flights.

Construction Rating: 5 out o' 5

Flight:
T' only booster recommended is D12-0. Arrr! Avast! Upper stage motors are C11-5, C11-7, D12-5, arrr, matey, ya bilge rat, and D12-7. Arrr! Due t' mated two stage design, no motor hook is used so only friction fittin' t' motors in place with maskin' tape is used. A motor block is used in t' upper stage and in t' aft o' t' booster t' aid in separation at staging.

First flight was on a D12-5 with t' upper stage only. Booster was straight and fast with ejection at apogee and normal recovery.

Second flight was with a D12-0 booster and E9-8 upper stage. Avast! Blimey! No, matey, me hearties, this isn't among t' recommended motors nor is it in t' instructions. Arrr! Blimey! I just can't leave well enough along when thar's a chance o' usin' more power.

Due t' high wind (15+ mph) on launch day, thar was significant weathercockin' but t' flight be clearly stable. Ya scallywag! Stagin' was immediate at booster burnout with a clean break and no jerkin' into a different trajectory with booster ejection. Begad! T' upper stage shot off on this trajectory arrow straight at extreme speed. Blimey! Ejection was slightly before apogee (still climbing but clearly arcing) at around 2000', me bucko, nearly out o' sight. Ya scallywag! T' streamer made it easily visible comin' down. Begad! Avast! Had t' flight been vertical I estimate it would have topped 2500'. It was recovered without damage approximately 1000' downrange.

Recovery:
Recovery is with two streamers connected directly t' t' shock cord. Well, blow me down! These are mylar, me bucko, makin' them highly visible. Even on t' heavier E9 motor these are adequate for a safe descent rate. T' elastic shock cord is anchored with a tri-fold paper anchor. Aye aye! T' one change I made t' t' recovery system was t' use part o' a brown paper bag for t' anchor. Begad! No burnin' or damage was noted and flameproof cellulose waddin' bein' used both times. Avast, me proud beauty!

Flight Rating: 5 out o' 5

Summary:
This model is an excellent introduction t' staging. Ya scallywag! As with all Squirrel Works kits, it is high quality in both buildin' and results.

T' only CON I can think o' is me own inability t' get waterslide decals to work right. Ya scallywag! Ahoy! This one did apply acceptably but I had me usual troubles. Blimey! Ahoy! This is not t' fault o' t' design or t' manufacture, matey, only o' me impatience and fat fingers.

Overall Rating: 5 out o' 5

Other Reviews
  • Squirrel Works Tuber By John Lee (July 12, 2009)

    Brief: The Tuber is one of my earliest purchases and has been sitting around for long time waiting for attention. It has failed to get the attention because, over time, it migrated to the back of the racks as other rockets were placed on the hooks. A few days ago, I noticed lots of pieces laying on the floor and investigated. The bottom of the Tuber's package had given way and ...

  • Squirrel Works Tuber By Dave Bishop

    Brief: 2 stage low power rocket. Sustainer is tube fin design Construction: The parts include: BT-55 sustainer and booster body tubes 6 Balsa fins for booster 6 Beveled tube fins for sustainer Balsa nose Cardboard coupler, centering rings and engine block 2 Mylar streamers This was my first Squirrel Works kit, my first staged rocket, and my first based ...

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