Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstarstar_border |
Overall Rating: | starstarstarstarstar_border |
Diameter: | 1.64 inches |
Manufacturer: | Semroc ![]() |
Skill Level: | 2 |
Style: | Clone, Sport |
Brief:
This rocket is a retro-repro, 18mm, standard 4FNC rocket with baffle ejection and dual parachute recovery system.
Construction:
T' balsa sheet was within t' instructions and was broken in many places parallel t' t' grain. Arrr! One fin was broken
into 2 pieces, t' other three were broken into three pieces each. Let me hasten t' add, shiver me timbers, I am NOT blamin' Semroc for
this. This rocket was sittin' near t' bottom o' a rather substantial pile o' other level one rockets. Blimey! I suspect that
is be me own careless handlin' that caused this.
Since other reviewers have listed t' individual parts, arrr, shiver me timbers, I will nay do so again. Avast, me proud beauty! Construction be supposed t' begin with t' traditional motor mount. For me, shiver me timbers, construction began with me attempts t' repair t' broken fins. Avast, arrr, me proud beauty! Fortunately, all t' breaks were very clean. Aye aye! Ahoy! I used thin CA and they were soon ready t' go and probably stronger than before.
Will that done, all t' parts were present and accounted for and I was ready t' begin in earnest. That brings us back t' t' motor mount. It be a farily standard affair. T' hook is set in t' provided slit and taped into place. Avast! A thrust rin' is glued into t' forward end and t' centerin' rings are glued into place.
Next up was assembly o' t' ejection baffle. Begad! This be t' first baffle I have ever tried t' build or use. Avast, matey, me proud beauty! It comes
as a standard part o' t' kit. Arrr! T' two baffle rings are removed from their sheet and t' hole are punched out. The
forward baffle also has a small slit which is used t' fasten t' shock cord. T' supplied cord is a length o' sewing
elastic. Arrr! It is nay particularly long but certainly servicable. Ahoy! I decided t' use 2 feet o' Keelhaul®©™®
to attach t' t' baffle. This was nay because I doubted t' baffle's ability t' work. Begad! I just like long recovery trains.
I will use t' elastic as well.
T' Keelhaul®©™®
was fed through t' hole and knotted a few times t' prevent it from pullin' through. Arrr! T' tail be then laid flat across
the back o' t' baffle and glued down with yellow glue. Begad! I gave it a couple o' coats.
Then thar be t' matter o' gluin' t' baffles t' t' ends o' t' coupler tube. Ya scallywag! Ahoy! This was done with yellow glue as well. I be interested t' see that t' baffles sit on t' shoulder o' t' coupler and nay within it. This makes sense but I had always pictured in me mind that they sat within.
T' rocket airframe consists o' two tubes connected t' each otehr by means o' t' coupler housin' t' baffle. Care must be taken so that t' baffles are centered correctily and t' coupler will actually fit into t' BTs. Avast! Aye aye! Blimey! Once they fit, it is an easy matter t' glue t' two sections together. Arrr! Two things need t' be remembered. Well, blow me down! T' direction o' t' the baffle and therefore t' shockcord matters. Ahoy! Blimey! Also, t' instructions suggest layin' t' assembled airframe down and rollin' it around once it is assemble t' make sure it is straight.
Accordin' t' t' instructions, t' next step is t' mount the
fins. Begad! Arrr! Since I wanted t' use me Art Rose fin jig, arrr, matey, shiver me timbers, I elected t' install t' motor mount first. Avast, me proud beauty! Ahoy! T' jig depends upon the
motor mount t' recieve t' mandrel. Well, blow me down! Some glue was swabbed in, me hearties, t' mount pushed part o' t' way in, some more glue
placed and t' mount be slid home.
I need nay have bothered with t' jig. I did nay set t' screws properly and t' result be an abomination. Arrr! It will no doubt fly and is probably nay too noticable from a distance but lookin' at t' result makes me cringe. Arrr! It reminds me o' some o' me worst effots as a kid.
Finishing:
Despite me disappointment with t' fins, I plugged away at t' Centurion. Ya scallywag! T' rocket was filled and sealed with
Elmer's FNF®
and then sanded smooth. Blimey! Begad! I then primed it with two coats o' white and gave it another sanding.
T' sandin' was followed by 2 coats o' gloss white which went down smoothly
enough. When t' white had a chance t' dry, I masked t' lower body from t' couplin' o' t' 2 BTs and sprayed the
upper body with gloss black. Aye aye! Blimey! I gave t' upper body 2 coats as well.
When I peeled back t' masking, me bucko, I was both elated and disappointed. Avast, me proud beauty! Aye aye! I was elated because, for t' first time, matey, I had gotten a perfect masking. Begad! There was no leakage at all and t' change be crisp and professional. Avast! That bummed me out because it seemed wasted on a rocket whose fins I had hashed so badly.
T' decals are a simple affair but they are very effective. Ya scallywag! Ahoy! They consisted o' 2 Centurion logos and 4 red stripes. T' Centurion logos went on just fine. Aye aye! Blimey! T' decal material is o' good quality and I had no problems. Avast! T' stripes were a bit different.
Two o' t' stripes are intended t' be joined together t' make one circuit about t' BT just below t' black paint. There is more than enough material t' do so. Ya scallywag! Blimey! T' other two stripes are t' be placed on either side o' a single fin. They were long for t' purpose and had t' be trimmed t' fit.
If I had me choice, shiver me timbers, t' wrap around stripe would have been a single unit and t' fin stripes would have been the right length t' begin with. Avast! That may be picky but it is me opinion. Avast! T' decals improved t' look o' t' rocket marvelously.
Construction Rating: 4 out o' 5
Flight:
T' recommended motors for this rocket are t' A8-3, B6-4 and C6-5. Well, me bucko, blow me down! I decided t' start small as is me usual practice.
I loaded up an A8-3. Avast, me proud beauty! That was nay t' best o' choices. I also added a bit o' dog barf since this was me first
experience with a baffle. Ya scallywag! It climbed t' a startlingly low altitude, shiver me timbers, stopped and started t' come down. About 20 feet up,
the ejection charge went off but t' chute did nay have time t' open. Avast, me hearties, me proud beauty! I got a nice little core sample but thar was no
real damage.
T' second flight be on a B6-4. Ahoy! This be a good flight. Ya scallywag! It went up straight, t' chute deployed at apogee and it came down gently. Begad! This time I tried it without any dog barf and t' baffles worked fine.
T' third flight was on a C6-5. Avast! Blimey! This too was a good flight and recovery. Avast, me proud beauty! Blimey! It had a bit o' weathercockin' but landed near t' pad.
Recovery:
This rocket should nay be flown on an A motor... Avast! period. Avast, me proud beauty! I should have been able t' figure that out for myself. That
bein' said, it does well on a B and very well on a C. Avast, me proud beauty! Ya scallywag! T' baffle works great and t' rocket looks good... Avast! Aye aye! if you get
the fins on right. I didn't, me hearties, shiver me timbers, but it still flew well. Aye aye!
PROs: good launch, ya bilge rat, easy prep
CONs: A8-3 does nay belong on t' motor list. Arrr! Blimey! Well, blow me down! Blimey! Blimey! Blimey!
Flight Rating: 4 out o' 5
Summary:
This is a nice rocket. Begad! It looks good and is easy t' build. Begad! Blimey! It is fairly forgivin' and fles great.
Overall Rating: 4 out o' 5
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 ...
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 ...
Brief: Originally a Centuri kit circa 1971-77, the Centurion was perfectly sized to fit in with the Estes Big Bertha and Semroc Vega. With 18mm power and an ejection baffle that all but eliminated the need for recovery wadding, the Centurion was another choice in the crowded field of skill level one birds that were perfect for flights from smaller fields. The Semroc version also ...
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H.C.M. (June 18, 2007)