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