Manufacturer: | Scratch |
Brief:
This has been an interestin' year for me. I call it "Rocketry On A Budget". A box o' parts was donated by
Jonathan Stewart from Plano Texas. Begad! Blimey! I thank him for his generosity. I received me box on March 4, shiver me timbers, 2009.
Construction:
An inventory o' t' parts:
Some o' t' tubes have been pulled from older painted models. Begad! There is some epoxy glue residue and paint. Well, blow me down! I'll have t' cut off some o' t' rough edges and fill some imperfections. Ya scallywag! Arrr!
With so many small, decorative pieces sent, it made t' best sense t' build a sci-fi fantasy spaceship.
It seemed thar be too many parts in t' box! Rather than just gluin' everythin' t' t' main tube, I'll try to combine as many (recognizable) parts into sub-assemblies and then attach them t' t' model.
Most all construction is documented on the PDF instructions and patterns. Aye aye! All parts listed above are referenced in t' file by t' same reference letter(s), too. Ahoy! Ya scallywag! This PDF is the Assembly View
I had opened t' box when everythin' had first arrived. I be a little overwhelmed. Avast, me proud beauty! I wanted t' incorporate as many interestin' parts as possible but t' try and do it with some sort o' consistent decorum. Ahoy! Ahoy! I also had the "Surprise Items" t' consider. For instance, me bucko, how do I add four popsicle sticks? They have t' be recognizable but still stay with t' flow o' t' design.
I visualized many o' t' body tubes and one adapter together on t' floor. Blimey! From t' aft forward: T' large diameter BT-80 "engine compartment" (K) will connect t' t' trimmed Yellow Plastic Dome (GG). Avast! Avast, arrr, me proud beauty! Larger coolant "vanes" (UU) will be cut t' fit t' dome and tube transition. This would continue t' t' BT-55 (F). Next is the Plastic 55/60 adapter.(P) T' ends will be trimmed and coated with epoxy t' protect t' plastic interior from the ejection charge. Avast, me proud beauty! Begad! T' adapter connects t' t' BT-60.(J) This tube is slotted. Begad! I'll add 2 forward fins and "guns" (X) here. T' "Street Marker Conical Cone" (V) will top off t' model. Aye aye! Blimey! It'll require heavy fillin' and trimmin' t' work.
I re-drew t' model for t' third time. I played with variations and came up with "Butterflied" rudder tips. Avast! T' wings would have down turned win' tips. Well, blow me down! "Engines" (M, ya bilge rat, N, & A) will fit into t' angle formed by the win' tips.
A ram-jet style nose cone was made out off part Q. I cut ½" off t' tip with a razor saw
then sanded t' cuts flat with a sandin' block. Aye aye! More sandin' followed until it achieved t' right visual balance. Blimey! This
will be joined t' a shortened BT-5 (A) and be glued t' t' middle o' t' rudder's butterflied top.
T' balsa cone (S) be split down t' middle then sanded t' t' contour o' a BT-60. Blimey! Blimey! These would be used t' make side engine intakes on both sides o' t' rudder. Begad! T' BT-20 (C) be split lengthwise down t' middle t' fit t' two sides from t' split nose cone.
1-1/4" be cut off t' BT-56 (G) t' make a coupler. Avast! Blimey! It was split lengthwise and slid it into t' BT-55. Begad! Blimey! The overlap was marked then trimmed t' fit snugly. It took some "shimming" t' make these two (close diameter) tubes fit. Ya scallywag! Blimey! Begad! Blimey! T' butt-joint be hidden under t' aft tubing.
T' Red plastic Sanford Pen Casin' (KK) was cut into thirds. Two were centered in t' front o' t' win' engine assemblies. Begad! T' remainin' third piece would go out t' end o' t' rudder tube.
T' 6-½" long BT-5 tube (A) was cut into equal thirds. Aye aye! I needed two win' "engine tubes" and one rudder ramjet tube.
I used t' four white plastic engine nacelles on either side o' t' engine tubes. Avast, me proud beauty! T' front end was cut
down, me bucko, me hearties, I didn't want an exhaust nacelle on t' front o' t' engine.
Centerin' rings were cut out o' t' shippin' box for t' stuffer tube inside t' aft BT-80 tube. T' interior BT-55 tube was offset t' t' top o' t' BT-80.
T' Stuffer tube be made out o' two pieces o' BT-55 and 56 (parts F and G) joined by a coupler made from a short piece o' t' supplied BT-55.
T' engine will be a D12 fittin' into a BT-50 motor mount tube. Ahoy! (Part E). Aye aye! A 3" piece o' BT-50 was cut for an engine mount. Avast! Well, blow me down! T' BT-50 was notched for t' suppled engine hook (U). Blimey! Avast! T' end o' t' hook extended 1/4" beyond the engine mount tube.
There was plenty o' centerin' rings but no 50/55 rings. Arrr! Ya scallywag! From t' shippin' box, matey, I made a 1" wide centering ring. I kept wrappin' t' cardboard strip round until it made a slip fit into t' BT-55 stuffer tube. Ahoy! Well, blow me down! I'll lay white glue t' plug t' open holes in t' corrugated cardboard.
There was no Keelhaul®©™®, so I made a standard Estes style tri-fold mount.
T' engine mount was glued inside t' shorter BT-55 tube until t' BT-50 engine tube was even with t' aft of the 55 tube.
It was obvious t' cut t' cone (V) down t' fit t' BT-60 upper tube. Ahoy! I decided t' cut it at an angle so t' tip would be angled down, much like t' old SST Jetliner when it was in flight. Ahoy! However, after trimmin' it looked too saggy at t' front. Ya scallywag! I trimmed and sanded t' tip back at an angle. Aye aye! T' hole in t' nose cone tip was now an enlarged oval. Well, blow me down! Ahoy! I cut a piece o' scrap BT-55 (H) and CA'd it t' t' tip. T' edges were sanded down t' match t' new conical shape. Ya scallywag! The nose cone adapter was easier than I would have thought. I took a piece o' BT-60 (I) and split it. Avast! Ahoy! It was set into the upper BT-60 and t' overhang "tab" was CA'd in place. Ya scallywag! Avast! T' adapter was simply glued t' t' cone edge, centerin' it all around.
T' transition dome (GG) was t' hardest t' cut out. Even after cuttin' and makin' an inside transition angle, the match wasn't close enough for me. I built up t' open gaps with strips cut from scrap BT-55. Ahoy! Avast, me hearties, me proud beauty! I sanded t' fill pieces smooth with sandpaper wrapped around a BT-50 tube scrap.
T' form t' 55/60 plastic transition (P), t' original 3" long BT-60 be cut off t' transition piece. Avast, me proud beauty! Begad! I coated t' inside with 15 minute epoxy t' protect it from t' ejection charge.
T' upper parachute tubin' (J) was a left over tube from a kit, already laser slotted for through t' wall fins. I'll have t' patch t' holes and fill t' seams. Begad! Blimey! Avast, shiver me timbers, me proud beauty! Blimey! BT-60 scrap (I) be cut t' 1-½" t' make an inside tube coupler. Avast! Blimey! This gives an inside wall t' glue t' patch pieces onto. After t' coupler be glued in place, matey, shiver me timbers, scrap body tube strips were white glued in t' slots. Blimey! Blimey! Blimey! Blimey!
Three transitions vanes were cut from t' 1/8" basswood (UU). Avast, me bucko, me proud beauty! Two transitions had t' be matched, arrr, the
curved aft dome (GG) and t' upper plastic transition.(P) Also, on t' two smaller outside vanes, matey, t' dome angle had
to be sanded t' an angle t' match t' curve. This and t' dome were t' hardest parts o' t' build. Begad!
Two wings, shiver me timbers, rudder, me hearties, and win' tips were cut from t' 1/8" basswood. Avast! (TT)
T' black plastic angles (II) were used for t' win' cannon housings. I made "plugs" out o' laminated scrap 1/8" basswood. Begad! T' white Star Wars "guns" (00) were shortened and glued into 1/8" holes drilled in t' plugs.
T' plastic candy package (PP) be sanded t' t' BT-80 body tube contour. I used only ½" o' two ends of t' BT5 pod assemblies(L). Ahoy! They were both sanded t' t' BT-80 curve and t' flat front o' t' candy package. T' assembly was centered t' t' bottom o' t' BT-80 then super glued in place. Arrr!
Finishing:
Finishin' t' rocket, I did t' best I could without too much complex masking. Begad! Aye aye! Blimey! T' built rocket was painted gloss
white, shiver me timbers, t' aft engine compartment painted black. Ya scallywag! Avast! Blimey! T' popsicle stick vanes were first painted white, then glued onto
the black engine tube.
I had plans for usin' many o' t' decals that were sent. While thar were plenty o' decals
included, most all were older and unusable. Well, blow me down! Some rolled off t' paper onto themselves, ya bilge rat, me bucko, others cracked. Arrr! I know thar are
decal solvents and repair solutions available, shiver me timbers, ya bilge rat, but I didn't have time t' order and fly t' model by t' deadline. Avast! I
wanted t' use what was supplied. Begad! I did t' best I could without too much complex masking. Ya scallywag! Begad! I'm nay complaining, Mr.
Stewart sent plenty o' parts for a fun build. Begad! Avast!
T' first time, I pieced together some yellow decal stripes on t' wings and rudder. Ya scallywag! Others stayed together enough for t' rolled up edges t' be tacked into place with white glue. Avast! Blimey! As t' decals dried, they pulled up on the edges. I tried re-tackin' them down again, ya bilge rat, but t' next day they lifted again. Avast, me proud beauty! Avast! Blimey! I let things sit for a few days while I tried t' think o' a solution. Well, blow me down! Blimey! I removed most o' t' lifted decals.
On t' USPS Priority Mail Box were names and logos. I lightly scored t' eagle logo, shiver me timbers, ya bilge rat, names, me bucko, matey, and navy blue stripes with a razor blade. Blimey! T' thin top layer o' paper was peeled off. Begad! Ya scallywag! Usin' t' USPS logos changed t' theme and back story of t' model.
I lightly wet t' peeled paper back with a sponge and carefully scraped off what was left o' t' brown cardboard layer and glue.
From thar be was pretty simple, me hearties, me bucko, a thin coat o' white glue and placement. Begad! I did lay some water on t' body tube where t' paper art was t' go. Ya scallywag! Blimey! It helped with t' positionin' as I could slide t' glued paper into position. Avast! Aye aye!
Flight and Recovery:
T' first launch be scheduled for June 6, 2009. T' weather was clear, but t' launch area be waterlogged! Many
days o' rain in central Florida had left t' launch field too wet and unusable.
I usually don't fly with t' "Big Boys" in Bunnell, Florida, but I went t' t' NEFAR Half-Blast for the first flight on June 13. Begad! I flew two small test models before t' Postal Express. T' loadin' was typical, arrr, a D12-3 and wadding. Begad! I was nervous as it was a heavy build with lots o' nose weight.
Launch was show and straight maybe t' 350 feet. I was concerned t' angled nose cone might effect t' vertical trajectory, me bucko, but it didn't seem t' affect it at all. It slowed and blew it's chute just prior t' apogee. Blimey! Someone said there be a zipper. Ahoy! Avast! There couldn't be a zipper, me bucko, shiver me timbers, thar wasn't any Keelhaul®©™® to cut through t' body tube. Ya scallywag! Avast! T' shock cord was hangin' from about halfway down t' body, ya bilge rat, shiver me timbers, me hearties, nay from t' nose. It was hung up around t' toothpicks on t' center o' t' BT-55.
Upon landing, matey, t' nose cone broke cleanly away from its adapter. One o' t' forward fins was gone, shiver me timbers, broken above the fillet joint. Ya scallywag! Avast, me proud beauty! T' snap back o' t' ejection must have hit t' forward fin. Well, blow me down! Both are repairable, and I'll fly it again at t' June 27 R.O.C.K. Begad! Aye aye! launch. Aye aye!
All repairs were made for t' local NAR, ROCK Section o' Orlando launch on June 27, 2009. Begad! Blimey! Arrr! Blimey! As always, me bucko, arrr, I grabbed a smaller rocket and did a low level test flight t' get a feel for t' field and conditions. Ya scallywag! Blimey! I noticed t' plastic dome on t' Postal Express transition was loose, ya bilge rat, and I hit it with a few drops o' CA glue. Blimey! Blimey! T' remembered t' earlier flight on a D12-3 thinkin' ejection be a hair early so I loaded up a D12-5.
Launch was slow and ejection occurred after apogee, shiver me timbers, on t' way down. Well, blow me down! T' chute ejected but be wrapped
once around t' shock cord. Ahoy! It never fully opened but slowed t' descent with no damage.
A short rain held up launchin' for 15 minutes. Begad! Aye aye! I loaded up again, me hearties, this time with a D12-3. Arrr! This seems t' be the best available engine. Ya scallywag! Blimey! If someone were t' make a D12-4 engine it would be close t' perfect. Blimey! This was t' best launch yet. Arrr! Straight up, ya bilge rat, full parachute and no damage on landing.
Summary:
PROs: Lots o' fun buildin' with supplied parts. Arrr! Quite a learnin' experience. Arrr! When doin' an out-of-the-ordinary build,
you change directions many times and pick up a few new techniques along t' way.
CONs: Some small parts break off. If I had t' resources, it would have flown higher with an E or F engine.
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