Semroc Centurion

Semroc - Centurion {Kit} (KV-40)

Contributed by Bill Eichelberger

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Diameter: 1.64 inches
Manufacturer: Semroc
Skill Level: 2
Style: Clone, Sport

Brief:
Originally a Centuri kit circa 1971-77, me bucko, me bucko, t' Centurion was perfectly sized t' fit in with t' Estes Big Bertha and Semroc Vega. Avast! Blimey! With 18mm power and an ejection baffle that all but eliminated t' need for recovery wadding, the Centurion be another choice in t' crowded field o' skill level one birds that were perfect for flights from smaller fields. Avast! T' Semroc version also includes t' ejection baffle, shiver me timbers, and adds a second parachute for cool dual-chute recovery.

Semroc Centurion

Construction:
Parts list:

  • BC-1636 balsa nose cone
  • ST-1690 body tube
  • ST-16120 body tube
  • ST-730E engine tube
  • HTC-16 tube coupler
  • TR-7 thrust ring
  • CR-KV-40 centerin' rin' set (this includes t' parts for t' baffle)
  • EH-28 engine hook
  • LL-2A launch lugs (2)
  • SE-10 screw eye
  • EC-124 elastic cord
  • 2 RC-12 12" parachutes
Semroc Centurion

Semroc's instruction manuals are excellent, well illustrated, arrr, and all t' steps are adequately explained. That said, thar be very little else t' add about t' construction o' t' Centurion as it is a relatively simple 4FNC build. T' baffle also acts as t' connector betwixt t' upper and lower tubes and t' only change I made was t' anchor a 2 foot length o' Keelhaul®©™® shock cord t' t' upper baffle instead o' goin' with t' bare elastic that is provided. Well, blow me down! (Not that I don't trust Carl's judgment. It's just a personal preference.) T' only "gotcha" that I encountered be self-created and a result o' nay payin' attention t' t' instructions. Aye aye! As a result, me Centurion has t' upper and lower body tubes flipped around. Begad! Unless you're lookin' for it, ya bilge rat, arrr, ya bilge rat, it's barely noticeable.

Finishing:
Paintin' was blessedly simple. Aye aye! After riddin' t' project o' tube spirals and balsa grain with thinned Elmer's Fill 'n' Finish and sandin' and primin' with Valspar primer, I painted t' bottom section gloss white and t' upper section gloss black. Although it isn't mentioned in t' instructions, I found that t' paintin' was most easily accomplished before joinin' t' upper and lower halves o' t' rocket together. Aye aye! (Be sure t' mask off t' tube connector/baffle or install it after painting.) Decals are minimal, me bucko, me bucko, but in this case that's a good thin' as they don't detract from the Centurion's clean lines.

Construction Rating: 5 out o' 5

Flight and Recovery:
First flight be delayed several times by high winds that canceled our club launches, me hearties, and had it nay been for a missin' launcher, t' first flights might well have been made at pseudo-legendary B6-4 Field near me home. As it was, the first two flights were at t' VOA on a warm, ya bilge rat, breezy Sunday in May. Well, blow me down! Blimey! Blimey! Flight #1 be on a B6-4 and proved me suspicion that this rocket would be perfect for small field flights, somethin' that it's likely t' see quite a few o' before the end o' this flyin' season. Pointedly loaded without ejection wadding, t' Centurion wind-cocked off o' t' pad in the stiff breeze, ya bilge rat, ya bilge rat, ejected just as it lost momentum, and floated t' within 100' o' t' pad, me hearties, a perfect recovery despite one of t' chutes failin' t' open. Avast! Avast! Blimey! (T' chute be in perfect shape, arrr, it just failed t' unfurl.) No damage or discoloration was noted on either chute or on t' elastic shock cord, so t' baffle obviously worked like a charm. Ahoy! Blimey! Flight #2, me hearties, arrr, on a C6-5, me hearties, was a carbon copy o' t' first, arrr, only with greater altitude, dual parachute recovery, and a somewhat longer walk into t' veggies. Ya scallywag!

Semroc CenturionSemroc Centurion

Flight Rating: 5 out o' 5

Summary:
PROs: Cool vintage looks. Blimey! Blimey! Baffled ejection. Begad! Begad! Dual chutes.

CONs: Ease with which I screwed up t' placement o' t' two tubes. Avast, me proud beauty! Well, arrr, blow me down!

Overall Rating: 5 out o' 5

Other Reviews
  • Semroc Centurion By John Lee (March 29, 2008)

    Brief: This rocket is a retro-repro, 18mm, standard 4FNC rocket with baffle ejection and dual parachute recovery system. Construction: The balsa sheet was within the instructions and was broken in many places parallel to the grain. One fin was broken into 2 pieces, the other three were broken into three pieces each. Let me hasten to add, I am NOT blaming Semroc for this. This ...

  • Semroc Centurion By Ron Wirth (July 12, 2007)

    Brief: The Centurion is another nice addition in the Semroc Retro-Repro series of rockets. For being a 4FNC rocket, it has some cool extras, namely the dual chutes, ejection baffle and shape of the laser cut fins that lead me to purchasing this rocket. I really like the curved portion of the fin at the rear of the rocket. Construction: This kit comes with 2 sections of body ...

  • Semroc Centurion By Chan Stevens (June 7, 2007)

    Brief: The original Centurion was introduced in 1970 by Centuri and was one of the first rockets to introduce an ejection baffle system, eliminating the need for recovery wadding. This is good for long, slow flights, and a nice flier. Construction: The parts list: Balsa nose cone 2 ST-16 body tubes 4 Laser-cut balsa fins 18mm motor kit 2 12" plastic ...

Flights

Comments:

avatar
H.C.M. (June 18, 2007)
A great kit, my review would agree with everything the reviewer wrote. Only one small problem from my end. The red stripe decals provided weren't quite long enough to go completely around the main body tube. It took some "piecing" together of two stripe decals. Not a big deal, but might be trouble for a younger modeler inexperienced with decals.

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