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