Semroc Tau Zero

Semroc - Tau Zero {Kit} (KN-2)

Contributed by Peter Stanley

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Diameter: 0.76 inches
Length: 16.00 inches
Manufacturer: Semroc
Skill Level: 2
Style: Futuristic/Exotic
Semroc Tau Zero

Brief:
T' Tau Zero is a Semroc original kit, which was designed by Jay Goemmer. Avast! It has an unusually shaped nosecone and forward swept fins that attach t' a tube rin' with additional fins underneath. It is designed for 18mm motors and uses streamer recovery.

Construction:
As with every Semroc kit I've built, me hearties, t' quality o' components was excellent. Avast! Blimey! T' kit contained laser cut fins and alignment guides. Ya scallywag! Blimey! T' nose cone be machine turned. Aye aye! Blimey! T' main body tube is 18mm and t' tail rin' tube was BT-60 size. Additional components included were a thrust ring, matey, Keelhaul®©™® thread, shiver me timbers, elastic shock cord, matey, streamer, an engine hook retainer sleeve, an unusually large screw eye, matey, and waterslide decals.

Semroc Tau Zero

One o' t' first steps in construction involves tyin' Keelhaul®©™® thread t' t' thrust rin' and gluin' it inside t' body/motor mount tube. Mine got stuck part way and I was worried I would bend t' tube tryin' t' force it. Well, blow me down! I managed t' get it in without damagin' anything. Avast, me proud beauty! I think what may have happened be t' Keelhaul®©™® thread knot could have slid along t' outside edge o' t' thrust ring. Blimey! I also had trouble slidin' t' motor mount sleeve over t' engine hook. I think t' other issue with t' thrust rin' tightness probably contributed t' this.

Everythin' else went together well. T' included alignment guides were a welcome addition t' t' kit. Well, blow me down! Blimey! I think all kits should have them. Begad! I know thar are different techniques people use, but I don't trust me eyeballs entirely for alignin' fins. Avast, me proud beauty! Blimey!

T' included screw eye used t' attach t' shock cord t' t' nose cone was unusually big. Begad! It is almost as wide as the body tube inside diameter. Well, blow me down! Arrr! I guess it is t' help move t' CG forward. Arrr! When I installed it I didn't pay attention to the instructions and just screwed it in. Aye aye! Avast! I heard t' beginnings o' a slight, but subtle crack. Ahoy! Begad! I backed it out, shiver me timbers, put some glue in and screwed it back in. T' instructions say t' use a 1/8" drill bit t' open t' hole first. Ahoy! Well, matey, blow me down! I shouldn't have overlooked that part, but I think it is OK.

Semroc Tau ZeroSemroc Tau Zero

Semroc Tau ZeroSemroc Tau Zero

Semroc Tau ZeroSemroc Tau Zero

Semroc Tau ZeroSemroc Tau Zero

Semroc Tau Zero

Finishing:
T' instructions recommended pre-finishin' parts before construction. Begad! I decided t' do this because o' t' number of small pieces which would be difficult t' paint neatly after building. Blimey! Avast, me proud beauty! Blimey! I used three coats o' Elmer's Wood Filler on the body tube, rin' tube, fins and nose cone. I experimented with smearin' wood filler on t' balsa sheets before removing fins for t' first two coats o' filler. T' results were nay desirable and won't try that again. Ya scallywag! Begad! Blimey!

After all t' filling/sandin' was done I sprayed all parts with Krylon white primer. Arrr! Aye aye! T' smaller pieces were difficult t' paint, as I didn't come up with a good method for doin' it. Arrr! I spray painted t' tubes and nose cone Krylon Pewter. Avast! I brush painted t' fins with Testors fluorescent yellow. I painted t' base o' t' nose cone and cannons silver and inside o' t' rin' tube black.

T' only drawback t' pre-paintin' everythin' be t' surface adhesion that is lost when gluin' things together. Begad! Blimey! I could have tried scratchin' off some o' t' paint at t' glue points, but would have been hard nay t' over-scrape. Avast, arrr, me proud beauty! Blimey! One thin' I could have done but didn't think about be t' use a pin t' poke holes along t' glue joints.

T' supplied waterslide decals were great quality. I've never had a problem with waterslide decals in any Semroc kit I've built.

Construction Rating: 4 out o' 5

Flight:
I flew t' Tau Zero on a B6-4 and 2 A8-3s. Ahoy! Avast, ya bilge rat, me proud beauty! Before t' first flight one o' t' fin cannons fell off, but I flew it anyway. Ya scallywag! It arched over slightly on t' B6-4 and deployed just after apogee. Aye aye! Begad! T' two flights on A8-3s went up straight and deployed right at apogee.

Recovery:
It seemed t' come in a little hot with t' supplied streamer but no damage be done. Avast! Arrr! One fin did pop off after the third flight, matey, but I think that was due t' a poor glue bond from gluin' after painting. Ya scallywag! It was easy t' fix.

Flight Rating: 5 out o' 5

Summary:
One o' t' cons (which could be more attributed t' me experience level) be t' trade off betwixt finishin' and construction. Avast, me proud beauty! Pre-finishin' everythin' raises issues with proper gluin' methods but makes it easier t' paint and keep everythin' clean.

One pro is it's unusual design. Well, blow me down! T' forward swept fins and tube rin' give t' illusion o' a bigger rocket. Ahoy! I also really appreciate t' supplied alignment guides. Avast, me proud beauty! Arrr! It would nay be hard for kit manufacturers t' supply these with everythin' but nay many do.

Overall Rating: 5 out o' 5

Other Reviews
  • Semroc Tau Zero By Dick Stafford (March 28, 2010)

    ( Contributed - by Dick Stafford - 03/28/10) Brief: This is third and final kit that I received from the last 2009 Quarterly Rocket Give-Away so, once again, many thanks to Nick! The Tau Zero, as you all know, is a futuristic rocket from Semroc that flies on 18mm motors and recovers via a streamer. As of this writing, there are no less than seven great reviews on this kit. As a ...

  • Semroc Tau Zero By Tyler Jones (April 1, 2009)

    Brief: This rocket was designed by Jay Goemmer from Twin Falls, Idaho. I live in the same city (and know him) so I decided it would fun to try it out. The Tau Zero is of a really cool design and it has all the quality that Semroc is known for. Construction: The components that this kit came with are: 1 Rolled Balsa Nose Cone 1 Body tube ST-7100 (BT-20) 1 Body ...

  • Semroc Tau Zero By Jamie Martin (March 23, 2009)

    Brief: This is a futuristic kit with an unusually-shaped nose cone, forward-swept outer fins, and a ring fin. Construction: The kit contains: -Balsa nose cone -body tube -ring fin -laser cut fins -empty casing -thrust ring -engine hook -retaining ring -1/8" launch lug -launch lugs for ion cannons -wooden dowels for ion cannons ...

  • Semroc Tau Zero By Robert Gustin (March 22, 2009)

    Brief: SEMROC's Tau Zero is a futuristic looking, fighter styled, single stage model rocket. Designed by Jay Goemmer, it has a long, bulbous nose cone, a ring tail with 3 forward swept fins capped by laser guns. Construction: In the kit you get: Balsa nose cone Main body tube Ring fin body tube Laser cut fins (3 outer fins, 3 inner fins) Engine hook ...

  • Semroc Tau Zero By Chan Stevens (February 22, 2009)

    Semroc has released a futuristic kit by guest designer Jay "Centuri Guy" Goemmer. The design was inspired by the Paul Anderson novel of the same name. It features both fin and ring stability, sharp-looking details, and a set of decals in alien language. Parts are the usual excellent Semroc quality: Balsa nose cone ST-7100 body tube (basically a thick-walled 18mm ID tube) ST-1622 ...

  • Semroc Tau Zero By Howard Smart (January 31, 2009)

    Brief: This is a small Sci-Fi looking model with forward swept fins, a ring fin and a bulging nose cone. Construction: The kit contains: Balsa Nose Cone Body tube (also serves as 18mm motor mount) Ring fin (body tube material) Sheet of laser cut 3/32 in. balsa fins - 6 all together, 3 inside and 3 outside ring fin Empty motor casing (spacer) Thrust ring ...

  • Semroc Tau Zero By Jewel B. Butler Jr. (January 11, 2009)

    Brief: This is a single stage combo ring fin and forward swept fin design. You don't get a lot of altitude, but you get style and stability. Construction: Semroc Parts-basically a BT-20 body tube and a BT-60 ring-fin and three forward swept fins with dowels on the ends of the wings.There is an engine hook that is attached out side the body tube but it is hidden by the ring ...

Flights

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