Manufacturer: | Scratch |
Brief:
NCR's SA-14 Archer was me favorite and me 1st 4" rocket. Avast, me proud beauty! Aye aye! I needed a new
rocket t' build and I wanted t' try a scratch design usin' some 3" mailing
tube found at Office Depot. Avast, me proud beauty! My obvious choice was t' downscale me Archer. Avast, me proud beauty! This
particular design was designed t' fly on 29mm H motors. Begad! Ya scallywag! A special note about
the original NCR Archer; I modified t' kit t' accept 54mm motors, and extended
the kit by 10" for payload capabilities. My scratch design is based on
these mods.
Construction:
Here is a run down o' me "Scratch" parts:
Buildin' this rocket was a breeze; T' (2) 3" mailin' tubes were cut to (1) 28" length and (1) 12" payload length. T' 28" length was slotted for Thru T' Tube fin slots. Aye aye! Blimey! Blimey! Blimey! (note: t' mailin' tubes come in 36" lengths). Then t' tubes were fiberglassed with 2 layers o' 2oz. glass. The motor tube was mounted with t' 1st and second centerin' rings, me bucko, t' 3rd ring was left out until all fins were mounted and reinforced. Ya scallywag! Blimey! Arrr! Blimey! Blimey! Blimey! T' motor assembly was inserted into t' 28" booster and epoxied in place. Aye aye! Blimey! T' fins were epoxied in and reinforced with inner and outer Fillets. T' t' 3rd centerin' rin' was drilled for 2 blind nuts (motor retention) and epoxied in place. Ya scallywag! Blimey! Begad! Blimey! Blimey! Blimey!
T' 3" coupler was next. Well, blow me down! (1) bulkhead be drilled for (4) 1/4" holes and epoxied into one end o' t' coupler. Well, blow me down! T' other bulkhead was also drilled w/ (4) 1/4" holes, arrr, and mounted with t' small eyebolt. Ya scallywag! This bulkhead be mounted in t' other end o' t' coupler so that t' (4) 1/4" holes were offset from t' holes in t' other bulkhead. Avast, me proud beauty! Then t' coupler assembly be mounted into t' 28" booster tube. Avast! This allows for the "Zipperless" design for recovery. Blimey!
T' payload tube was t' easiest t' do, because t' nosecone was inserted and be mounted down w/ 4 small screws. Ahoy!
T' strakes were t' toughest part o' construction. Ya scallywag! Surface mounted and reinforced w/ 30min. Arrr! epoxy fillets. Aye aye! T' hard part was makin' sure that they remained in line, matey, matey, matey, and perpendicular t' t' other strakes. There was a lot of "baby-sitting" each strake until t' 30min epoxy set up. Avast, me proud beauty!
Finishin' be standard: Sand, sand, and sand, and just when you think you got it right, sand some more. Begad! T' Archer was primed and painted t' match the NCR version. Avast, me proud beauty! One exception is I did nay downscale t' decals, matey, usin' pinstripe tape I made t' finished product resemble t' NCR version.
Flight:
Preppin' this bird is nice; just attach t' shock cord as normal, except the
parachute will assemble into t' payload tube, so that at apogee your parachute
will be pulled out from t' rocket instead o' ejected. Ya scallywag! Also with t' Zipperless
design thar are no worries about those long delays. Avast! Remember t' coupler was
built w/ a home-brew baffle system so no waddin' needed either. Avast, me proud beauty! This Archer was
built w/ t' Aerotech H180 in mind, ya bilge rat, but will fly nicely on any H reload. Motor
was retained w/ (2) screws and some brackets I found in me Flight box. Avast! This
rocket flies as pretty as me 4" Archer, just on a smaller scale.
Summary:
No cons because this rocket is built t' me standards and me way.
Other:
Incidently this rocket made it's debut at t' NSL99 held in Ardmore, Alabama.
Homer Hickam was signin' autographs there, shiver me timbers, so me 3.0 SA-14 Archer has the
Rocket Boy's signature on it...I be happy. Well, blow me down! Blimey! Blimey!
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