Semroc Brighton

Semroc - SLS Brighton {Kit} (KA-9)

Contributed by John Bergsmith

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstar_borderstar_border
Overall Rating: starstarstarstar_borderstar_border
Diameter: 2.64 inches
Manufacturer: Semroc
Skill Level: 2
Style: Cluster, Sport

Brief:
T' Brighton is an upscaled version o' t' Estes Ranger. Avast! Avast, matey, me proud beauty! T' kit features four different interchangeable motor mount options: 4x18mm cluster, 3x24mm cluster, single 29mm, or single 24mm usin' a 29/24 adapter. T' Brighton includes a baffle system t' protect t' recovery parachute from t' ejection gases.

Brighton w Ryan

Construction:
Lots o' parts with this kit!

  • BNC 80 balsa nose cone
  • BT-80 (heavy wall) payload tube
  • TC-80 coupler
  • BT-80 (heavy wall) main body tube, pre-cut for TTW fins
  • Laser cut basswood fins
  • 2.25" Inner motor mount receptacle tube
  • 24" nylon chute
  • heavy elastic shock cord
  • waterslide decal
  • Baffle system parts:
  • 2 series 8 body tubes
  • 2 plywood centerin' rings
  • 4x18mm motor adapter parts:
  • 4 BT-20 motor tubes
  • 4 metal hooks
  • 2 plywood centerin' rings
  • 1 BT-70 adapter tube
  • 3x24 motor adapter parts
  • 3 BT-50 motor tubes (E-sized)
  • 3 metal hooks
  • 1 plywood centerin' ring
  • 1 BT-70 adapter tube
  • 3 TC-50 1" D-E adapter couplers/plugs
  • 29mm motor adapter parts:
  • 29mm heavy wall motor tube
  • 2 plywood centerin' rings
  • 1 BT-70 adapter tube
  • 24/29 motor adapter kit parts:
  • BT-50 heavy wall tube (E sized)
  • metal hook
  • motor block
  • TC-50 1" D-E adapter coupler/plug
  • 2 29/24 heavy wall tubes(centerin' rings)

T' Semroc instructions are excellent and include excellent illustrations. Aye aye! T' first part o' t' construction involves t' motor mount, matey, me bucko, ya bilge rat, and t' parts that make it interchangeable. Aye aye! Begad! Semroc provides a wrap for markin' t' fin lines, and motor mount hook. Well, blow me down! Be careful and make sure your lines are accurate so t' fins will align correctly. Avast! Avast, me bucko, me proud beauty! Dry fitting this assembly usin' t' BT is a must t' make sure everythin' works out correctly. Avast! T' fins are TTW and t' fit was excellent. Avast! Epoxy be used t' glue t' fins, and epoxy/microballoons was used t' create nice fillets. T' included launch lugs are 1/4". T' upper body is basically a payload bay. Avast, me proud beauty! Good place for your altimeter, arrr, experiments, ya bilge rat, or cargo. Nothin' unusual about t' construction in this area so I won't spend t' much time here. Begad! T' nose cone has no retention method other than a friction fit. This works, just be sure you have a secure fit.

T' baffle included in t' kit a very easy design t' build, matey, me bucko, yet effective. Begad! It uses t' offsettin' tube design that attaches t' centerin' rings. This assembly is slid into t' lower body. T' baffle also is also used t' attach the shock cord. I used a thin coat o' epoxy t' glue t' baffle into t' body tube. If you like gluin' tubes t' various modular motor mounts are goin' t' be perfect for you. Begad! Ya scallywag! It takes a while t' get all o' t' adapters built, shiver me timbers, but once completed you can use any motor you have in stock.

Finishing:
Followin' me normal procedures I sealed t' fins and nose cone usin' two coats o' Minwax Polyurethane. Once dry they were sanded smooth and coated usin' thinned spackle that be brushed on t' fill t' wood grain. Ahoy! Well, blow me down! T' filler be sanded off and t' rocket be primed with two coats o' Duplicote High Fill primer sandin' betwixt coats. T' nose cone was painted black usin' two coats o' old formula Krylon spray. Avast, me proud beauty! Aye aye! T' lower body be painted metallic red usin' two coats of Rustoleum spray. Avast! On t' upper body I used Valspar yellow. Once dry t' lower body was smoothed usin' super fine steel wool. Once clean and dust free t' body be shot with two coats o' Rustoleum clear. Avast, me proud beauty! Overall I'm happy with t' finish.

T' only con for me be t' colors Semroc used for t' cover art, me hearties, one word...ugly. This rocket really does deserve a retro lookin' finish.

Construction Rating: 4 out o' 5

ReadyFlight:
For t' first flight I chose an AT F40-7 load for t' 29mm case. T' boost be perfectly straight, and fairly quick. No stability issues were noted. T' ejection was late, but nay by much. Aye aye! Well, blow me down! I think a six second delay would be perfect. T' rocket was recovered with no damage, ya bilge rat, just a little somethin' missing. Ya scallywag! Avast, arrr, me proud beauty! T' 29mm modular motor mount be gone, along with me case. Well, blow me down! Basically t' single motor hook that holds t' modular mounts in t' body is just nay up t' t' task. Aye aye! I even added tape t' t' hook before launching. Aye aye! Begad! T' baffle also contributes t' t' issue by creatin' back pressure that needs a more substantial retention method. Well, blow me down! Avast, me proud beauty! For me t' fix is easy because I'm goin' t' glue t' 29mm adapter in the body. Begad! Arrr! I have no intention o' usin' t' clusters.

Recovery:
T' shock cord included in t' kit should be replaced with Keelhaul®©™®, and tubular nylon. Begad! It also needs t' be longer t' prevent t' body sections from slammin' into each other. Ya scallywag! T' 24" chute is just about perfect for t' Brighton, no damage be sustained. Avast! T' baffle worked with no burn marks on the chute or cord. Ya scallywag! T' baffle makes t' rocket a quick setup as well.

Flight Rating: 3 out o' 5

Summary:
I think t' Brighton is another great product from Semroc. Begad! T' quality o' t' materials included in this kit is outstanding. Ahoy! Arrr! T' packagin' is a work o' art because a lot o' tubes are in that bag. Blimey! However, me hearties, I do have an issue with the Brighton. Blimey! T' modular motor mount retention method needs t' be redesigned. T' single small motor hook isn't up to the task o' retainin' t' modular mounts. Ya scallywag! As a result t' flights can be very expensive if it costs you a motor case. Also, ya bilge rat, t' fallin' motor mount could create a safety issue nay t' mention it could cause a deployment failure. Avast! Blimey! However, this should be a simple issue for Semroc t' fix.

Overall Rating: 3 out o' 5

Other Reviews
  • Semroc Brighton By Chan Stevens (January 3, 2009)

    Brief: This is essentially an upscale retro/repro of the classic Astron Ranger, but in deference to Vern Estes, Semroc avoided naming this after one of his favorites, instead going with the Brighton. It's a fantastically engineered, incredibly versatile rocket, featuring four different interchangeable motor configuration options: 4x18mm cluster, 3x24mm cluster, single 29mm, or ...

Flights

comment Post a Comment