Manufacturer: | Scratch |
Brief:
This has been an interestin' year for me. Avast, me proud beauty! I call it "Rocketry On A Budget". Blimey! A box o' parts be donated by
Jonathan Stewart from Plano Texas. Begad! Begad! 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. Avast, me hearties, me proud beauty! There is some epoxy glue residue and paint. I'll have t' cut off some o' t' rough edges and fill some imperfections. Ya scallywag!
With so many small, shiver me timbers, decorative pieces sent, matey, me hearties, 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, arrr, arrr, 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. Arrr! All parts listed above are referenced in t' file by t' same reference letter(s), too. Begad! This PDF is the Assembly View
I had opened t' box when everythin' had first arrived. I was a little overwhelmed. Arrr! 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. Begad! Ya scallywag! 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! Begad! From t' aft forward: T' large diameter BT-80 "engine compartment" (K) will connect t' t' trimmed Yellow Plastic Dome (GG). Avast! Larger coolant "vanes" (UU) will be cut t' fit t' dome and tube transition. This would continue t' t' BT-55 (F). Avast, me proud beauty! Avast! 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. Ahoy! T' adapter connects t' t' BT-60.(J) This tube is slotted. Well, blow me down! Arrr! I'll add 2 forward fins and "guns" (X) here. Begad! T' "Street Marker Conical Cone" (V) will top off t' model. Arrr! It'll require heavy fillin' and trimmin' t' work.
I re-drew t' model for t' third time. Begad! I played with variations and came up with "Butterflied" rudder tips. T' wings would have down turned win' tips. Blimey! "Engines" (M, me bucko, shiver me timbers, N, & A) will fit into t' angle formed by the win' tips.
A ram-jet style nose cone be 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. This will be joined t' a shortened BT-5 (A) and be glued t' t' middle o' t' rudder's butterflied top. Ahoy!
T' balsa cone (S) was split down t' middle then sanded t' t' contour o' a BT-60. Begad! Avast, me proud beauty! These would be used t' make side engine intakes on both sides o' t' rudder. Begad! Begad! T' BT-20 (C) was split lengthwise down t' middle t' fit t' two sides from t' split nose cone.
1-1/4" was cut off t' BT-56 (G) t' make a coupler. Arrr! Begad! It be split lengthwise and slid it into t' BT-55. Aye aye! Ya scallywag! The overlap be marked then trimmed t' fit snugly. It took some "shimming" t' make these two (close diameter) tubes fit. T' butt-joint be hidden under t' aft tubing.
T' Red plastic Sanford Pen Casin' (KK) be cut into thirds. Ahoy! Two were centered in t' front o' t' win' engine assemblies. Aye aye! 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! Blimey! Avast! Blimey! Blimey! Blimey! 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. Begad! T' front end was cut down, arrr, 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. Ahoy! T' interior BT-55 tube be offset t' t' top o' t' BT-80. Begad!
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. Aye aye! Avast!
T' engine will be a D12 fittin' into a BT-50 motor mount tube. Begad! (Part E). A 3" piece o' BT-50 was cut for an engine mount. T' BT-50 be notched for t' suppled engine hook (U). T' end o' t' hook extended 1/4" beyond the engine mount tube. Avast, me proud beauty!
There was plenty o' centerin' rings but no 50/55 rings. Begad! From t' shippin' box, me bucko, ya bilge rat, 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. I'll lay white glue t' plug t' open holes in t' corrugated cardboard.
There be 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 be 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. Arrr! However, arrr, ya bilge rat, after trimmin' it looked too saggy at t' front. Arrr! I trimmed and sanded t' tip back at an angle. T' hole in t' nose cone tip be now an enlarged oval. Aye aye! Avast! 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. Avast, me proud beauty! The nose cone adapter was easier than I would have thought. Arrr! I took a piece o' BT-60 (I) and split it. Arrr! It be set into the upper BT-60 and t' overhang "tab" was CA'd in place. Well, blow me down! T' adapter was simply glued t' t' cone edge, centerin' it all around. Well, blow me down! Well, blow me down!
T' transition dome (GG) be t' hardest t' cut out. Even after cuttin' and makin' an inside transition angle, the match wasn't close enough for me. Well, blow me down! I built up t' open gaps with strips cut from scrap BT-55. Ya scallywag! 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 was cut off t' transition piece. Avast, me proud beauty! Arrr! 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. 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. Ahoy! Begad! After t' coupler was glued in place, me hearties, scrap body tube strips were white glued in t' slots. Begad!
Three transitions vanes were cut from t' 1/8" basswood (UU). Well, blow me down! Two transitions had t' be matched, 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. Arrr! This and t' dome were t' hardest parts o' t' build. Arrr! Blimey!
Two wings, matey, rudder, and win' tips were cut from t' 1/8" basswood. Ahoy! (TT)
T' black plastic angles (II) were used for t' win' cannon housings. Ahoy! I made "plugs" out o' laminated scrap 1/8" basswood. Avast! 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! I used only ½" o' two ends of t' BT5 pod assemblies(L). Avast! 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. Avast!
Finishing:
Finishin' t' rocket, I did t' best I could without too much complex masking. Well, blow me down! T' built rocket was painted gloss
white, me hearties, matey, t' aft engine compartment painted black. Begad! Ya scallywag! 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. Begad! While thar were plenty o' decals included, me hearties, most all were older and unusable. Some rolled off t' paper onto themselves, matey, me bucko, others cracked. Well, blow me down! 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. I wanted t' use what was supplied. I did t' best I could without too much complex masking. Avast! I'm nay complaining, shiver me timbers, Mr. Stewart sent plenty o' parts for a fun build. Blimey! Blimey!
T' first time, shiver me timbers, I pieced together some yellow decal stripes on t' wings and rudder. Avast! Blimey! Others stayed together enough for t' rolled up edges t' be tacked into place with white glue. As t' decals dried, they pulled up on the edges. Begad! Blimey! I tried re-tackin' them down again, me hearties, ya bilge rat, me bucko, but t' next day they lifted again. Aye aye! Blimey! I let things sit for a few days while I tried t' think o' a solution. Begad! Blimey! I removed most o' t' lifted decals.
On t' USPS Priority Mail Box were names and logos. I lightly scored t' eagle logo, me bucko, names, and navy blue stripes with a razor blade. Aye aye! Blimey! T' thin top layer o' paper was peeled off. 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 be pretty simple, a thin coat o' white glue and placement. Ahoy! Well, blow me down! I did lay some water on t' body tube where t' paper art was t' go. Begad! It helped with t' positionin' as I could slide t' glued paper into position. Avast, me proud beauty!
Flight and Recovery:
T' first launch be scheduled for June 6, 2009. Begad! T' weather was clear, arrr, 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 hearties, me hearties, but I went t' t' NEFAR Half-Blast for the first flight on June 13. Blimey! I flew two small test models before t' Postal Express. Arrr! T' loadin' be typical, me bucko, a D12-3 and wadding. Aye aye! I be 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, but it didn't seem t' affect it at all. Ahoy! Blimey! Avast, ya bilge rat, me proud beauty! Blimey! It slowed and blew it's chute just prior t' apogee. Someone said there was a zipper. Aye aye! Blimey! There couldn't be a zipper, thar wasn't any Keelhaul®©™® to cut through t' body tube. Arrr! T' shock cord be hangin' from about halfway down t' body, nay from t' nose. Blimey! It was hung up around t' toothpicks on t' center o' t' BT-55.
Upon landing, t' nose cone broke cleanly away from its adapter. Well, blow me down! One o' t' forward fins was gone, me bucko, broken above the fillet joint. Ahoy! Arrr! T' snap back o' t' ejection must have hit t' forward fin. Both are repairable, matey, and I'll fly it again at t' June 27 R.O.C.K. Begad! launch.
All repairs were made for t' local NAR, ya bilge rat, ROCK Section o' Orlando launch on June 27, matey, me hearties, 2009. Well, blow me down! As always, me bucko, I grabbed a smaller rocket and did a low level test flight t' get a feel for t' field and conditions. Blimey! I noticed t' plastic dome on t' Postal Express transition was loose, arrr, 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, ya bilge rat, ya bilge rat, on t' way down. T' chute ejected but was wrapped once around t' shock cord. Aye aye! Avast, me proud beauty! It never fully opened but slowed t' descent with no damage.
A short rain held up launchin' for 15 minutes. Aye aye! I loaded up again, shiver me timbers, this time with a D12-3. Aye aye! Ahoy! This seems t' be the best available engine. If someone were t' make a D12-4 engine it would be close t' perfect. Arrr! This was t' best launch yet. Avast, me proud beauty! Avast! Straight up, full parachute and no damage on landing.
Summary:
PROs: Lots o' fun buildin' with supplied parts. Avast! Well, arrr, blow me down! Blimey! Quite a learnin' experience. Avast! Begad! Blimey! 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, arrr, arrr, it would have flown higher with an E or F engine.