Centuri Thunder Bird

Centuri - Thunderbird {Kit} (5339) [1980-1983]

Contributed by Bill Cooke

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Manufacturer: Centuri
Style: Sport
(OOP) Centuri Thunderbird

Brief:
This be t' long, sleek "middle brother" o' t' Centuri Thunder family, ya bilge rat, first introduced in 1980. Begad! (T' others are t' Thunder Roc and Thunder Hawk.)

Construction:
Parts list:

  • 2 18" lengths o' ST-10 tubin' (Semroc part #: ST-10180)
  • 1 3.9" long ogive balsa cone (Semroc part #: BC-1039)
  • 1 coupler for ST-10 (Semroc part #: BTC-10)
  • 1 1/8" x 2.25" launch lug (Semroc part #: LL-122)
  • 1 #7 t' #10 engine mount (Semroc part #: EM-710)
  • 1 laser-cut fin set (Semroc part #: FV-47)
  • 1 1/8" x 60" flat elastic
  • 1 decal set (from Excelsior)
  • 1 18" plastic parachute

Havin' built a clone o' t' Centuri Thunder Roc (See Bill Eichelberger's review here), matey, I recently moved on t' t' next largest o' the Centuri Thunder family, t' Thunder Bird. Avast, me proud beauty! A search o' Jim Z's plan site turned up zip, but I be able t' find a set on me next search, ya bilge rat, at Ye Olde Rocket Plans. Aye aye! Blimey! Blimey! Blimey! Discernin' t' parts was, me bucko, for t' most part, matey, ya bilge rat, easily done by lookin' at t' rocket dimensions and recommended engines, me bucko, however, me hearties, shiver me timbers, t' length of t' nose cone was a bit o' a problem. Ahoy! Blimey! Blimey! Blimey! After studyin' t' catalog picture, shiver me timbers, I finally settled on t' Semroc 3.9" ogive, me bucko, even though I later discovered that t' Semroc version o' t' Thunder Bird (yet t' be released) uses a cone 5.1" in length. My version o' t' Thunder Bird is slightly shorter than the catalog spec and t' Semroc version is slightly longer.

Havin' put together a parts list, shiver me timbers, I ordered them from Semroc. Blimey! Blimey! I had noticed that Semroc also offered a laser-cut set o' Thunder Bird fins and wishin' t' avoid some balsa cutting, shiver me timbers, matey, included them in me order as well. Aye aye! Blimey! T' parachute was an 18" plastic chute filched from an old Estes kit and a 60" shock cord was part o' a purchase from t' local fabric store. Well, blow me down! In a very kind gesture, Carl included a set o' Thunder Bird decals with me parts order--Semroc is a class act!

T' build was a pretty straightforward 3FNC construction with no gotchas. Well, blow me down! I strengthened t' fins by laminatin' them with computer paper, which also cut down on t' finishin' time. Arrr! T' extremely nice Semroc nose cone needed very little sanding, arrr, just a light coat o' thinned Fill 'n' Finish sealed it nicely.

Finishing:
After applyin' two coats o' Krylon primer (with sandin' in between), ya bilge rat, I painted the rocket per t' 1980 Centuri catalog: gloss white with t' fins and bottom 12" orange. Avast, me proud beauty! I did nay apply t' decals I received from Semroc (I will need them for this bird's successor), arrr, matey, optin' t' use a set that made up part o' an recent order t' Fred at Excelsior. Avast! They went on without a hitch after I had put on a couple o' coats o' Microsol liquid decal film.

Construction Rating: 4 out o' 5

Flight:
First flight occurred on September 16, 2005, on an Estes B6-4. Ya scallywag! Conditions were a bit breezy so I swapped t' 18" parachute for a 12" Semroc parachute. Arrr! T' flight was picture perfect straight with no wind cockin' and ejection occurrin' right after apogee. Blimey!

Recovery:
T' 12" chute be a good choice as it brought t' Thunder Bird down undamaged in t' soft grass just east o' t' pad.

Flight Rating: 4 out o' 5

Summary:
An easy t' build blast from t' past, shiver me timbers, me bucko, this is one o' t' few rockets intentionally designed as a member o' a rocket family. After buildin' this one, you should build its brothers, shiver me timbers, shiver me timbers, t' Thunder Roc and Thunder Hawk, and the "new" Semroc addition, t' ThunderBee.

Overall Rating: 4 out o' 5

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