Manufacturer: | Scratch |
Brief:
This is for t' Box o' Parts contest Well, this rocket for me has had multiple problems, me hearties, hence t' jinx
name. Blimey! Part o' t' issues be good old procrastination. Blimey! But, matey, excessive work schedules (a few weeks where I was averaging
70 hours a week), me bucko, stuck tubes, a crashin' computer that lost me files, arrr, and crashin' rockets (more about that later)
but it finally flew successfully! T' parts arrived late March. Ya scallywag! Like a kid giddy at Christmas, I opened t' box,
and was surprised by t' amount o' stuff!
Construction:
T' parts that I used are listed below:
T' first thin' I did was t' weigh t' parts. Aye aye! My goal was t' use as much as possible. Based on t' weight, shiver me timbers, I decided that t' rocket would need a cluster o' 2 D engines t' fly. Avast, me proud beauty! I also felt t' amount o' balsa wood be a bit skimpy (but as I actually got into t' build, shiver me timbers, it appeared that whenever I needed some wood, thar was still a piece available).
Durin' t' rest o' t' build, you will find me referrin' t' version 1.1 and version 1.2. What should be obvious, I first built version 1.1. Arrr! Blimey! First flight was at NERFF 4 and t' rocket crashed, shiver me timbers, causin' some major damage. Arrr! Blimey! Well, arrr, blow me down! Blimey! JINX! Blimey! T' keep with only usin' what came in t' box, I repaired and updated t' design t' version 1.2. Well, blow me down! Blimey! T' second launch also crashed. JINX! Blimey! But at least nay as bad. Avast, me proud beauty! Blimey!
Durin' t' development, me bucko, I made up various pieces and taped them together, matey, givin' me some flexibility t' adapt the design. Ahoy! Begad! Below is a teaser o' t' taped up version. Blimey! You will also see where I filled spirals usin' Elmers F&F.
I was tempted t' fly it, but I could nay figure out
1. What t' speed o' maskin' tape was
2. Ahoy! How t' convince an RSO t' launch it
3. Begad! Begad! How many pieces would it be in after a flight
For version 1.1, one o' me first steps was t' boil some corn (although clams or any other grub would work as well or just plain water). Once t' water be boiling, I placed t' 1/16 strip o' balsa (it be 2 x 12) across t' pan. Besides satisfyin' me hunger, I be also steamin' t' wood so I could bend it. Blimey! T' corn was done first so I had t' keep steamin' t' balsa but I finally removed t' balsa and sandwiched them betwixt 2 o' my wifes cake savers (one is 10 t' other is 12). Aye aye! Arrr! WARNING that last step can get you into trouble!! I let this sit for a while (over a day) for t' balsa t' retain its shape
I decided on usin' t' BT80 as me main tube, ya bilge rat, shiver me timbers, with 3 pod tubes off o' this main. Aye aye! Aye aye! I wanted t' use t' couplers to hold these pods. Well, blow me down! Arrr! Take t' 3 couplers (1 BT80 and 2 BT55) and draw lines t' length o' t' coupler on opposite sides (180 degrees apart). For t' BT80, make a mark at 2 on one line and a mark at 1 on t' other. Well, blow me down! Avast! For t' BT55, make t' marks at 1 and ½. Ya scallywag! Blimey! Usin' stiff paper, connect t' marks on both sides. Usin' a sharp knife, cut along these lines.
Some other preparation work take one o' t' 9 BT5 tubes. Avast! Make a mark 4.5 down from one end. Cut t' tube usin' this mark as t' center on an angle, arrr, ¼ above and below this position. Arrr! Epoxy a large plastic cap t' t' straight end o' each tube.
In addition, cut out 2 each o' t' 2 x 2 ¾ x 4 x 1 fin and t' ¾ x ¼ x 1 pieces shown above
For t' motor mount, I traced t' BT80 onto t' mailin' box and cut out t' circle. Avast, me proud beauty! Then I drew a line that went through t' center. On here, I traced 2 circles, centered on t' line but t' edges separated by about 1/8. I cut out these holes and dry fitted t' piece into t' BT80 and t' BT50 tubes into t' center circles. Avast, me proud beauty! Sand t' fit. Ahoy! Once satisfied, ya bilge rat, I used t' first piece as a template and made a second piece. Avast! T' two BT50 motor tubes had a 1/8 slit made 2 ½ from one end. Insert t' motor hook and secure with tape. Well, blow me down! Ya scallywag! Slide t' motor tubes into t' two centerin' rings. Blimey! Cut another piece o' cardboard 2 x 2.6 Glue t' 2 motor tubes t' t' centerin' rings, sandwichin' t' 2 x 2.6 cardboard betwixt t' motor tubes and t' rings. Let dry.
Take t' other 2 tongue depressors and make a mark 2 ½ from each end on t' edge. Begad! Blimey! Draw a line connectin' t' marks. Avast! Cut t' tongue depressor apart on this diagonal line. Aye aye! Bevel t' cut edges and glue t' pieces back together t' create an angle. Avast, me proud beauty! Glue a toothpick into t' angle created.
For version 1.1, I made some standoffs. Well, blow me down! Ya scallywag! Cut 4 pieces o' balsa ½ x 1 ¼. Ya scallywag! Well, blow me down! Bevel one o' t' 1 ¼ edges on each piece. Blimey! Glue t' pieces together so t' bevels create a V channel
While t' version 1.1 was designed for a 3/16 rod, me hearties, ya bilge rat, t' rocket was too heavy. Avast! Begad! Blimey! T' version 1.2 was upgraded for ¼ rod. Avast! Blimey! Since all I got be 1/8 launch lug material, arrr, I had t' improvise. Avast, me proud beauty! Avast, me proud beauty! Blimey! Take 3 o' t' small skewers, ya bilge rat, cut 2 t' 7 and t' third t' 9 from t' pointed tip. Save t' cut off ends for future use. Aye aye! Glue the two 7 skewers t' a tongue depressor even with t' ends. Avast, me proud beauty! Let dry. Blimey! Begad! Blimey! Cut t' ¼ dowel into two 6 sections. Glue these t' t' 7 skewers. Avast, me proud beauty! Finally, t' 9 skewer needs t' be glued in t' middle o' t' tongue depressor on t' opposite side.
From t' 1/8 balsa, arrr, ya bilge rat, cut 2 fins 9 x 3. Ya scallywag! I received a plywood fin that be already 6 x 2 ¼. Begad! You would need t' cut your own fin out.
T' BT80 section needs t' be lengthened for stability, so I transformed t' 80K nose cone into a transition. Avast, me proud beauty! For version 1.1, I planned t' eject t' parachutes from t' very top, me hearties, but I ran into issues. Arrr! Well, arrr, blow me down! Version 1.2 separates at the transition. First, me bucko, take t' plastic cup and cut about 1 1/8 diameter hole in t' top. Slide t' cup over t' nose cone end. Ya scallywag! Adjust t' hole size until t' edge o' t' cup (with t' lip) is snug on t' nose cone. Ahoy! Carefully, arrr, cut away the trim, matey, double check t' fit, then glue t' cup over t' nose cone. Ya scallywag! Let dry.
This is how it looks when done
T' attach t' top t' t' nose cone, arrr, take one o' t' BT 20 t' BT50 adapters and place it over t' top o' t' 80K nose cone. Avast! Blimey! Mark where it touches t' cone and remove it. Avast! Blimey! Begad! Blimey! Take t' BT50 tube. Begad! Blimey! First cut off a 3 length (to use as a motor mount). Aye aye! Blimey! Slide a BT50 section over t' nose cone end. Again, mark where it touches. Aye aye! Blimey! Dry fit t' BT20 t' BT50 adapter in t' 15 length and t' BT50 t' BT60 over t' same end. Push t' tube and adapters onto t' nose cone and verify t' fit. Ahoy! Blimey! Once you are satisfied, me hearties, slide t' BT50 t' BT60 adapter up a bit and remove t' BT20 t' BT50 adapter. Ya scallywag! Blimey! Aye aye! Blimey! I used 30 minute epoxy; put some inside t' BT50 tube followed by t' BT20 t' BT50 adapter. Place more epoxy on t' outside o' t' BT50 tube near t' end. Begad! Blimey! Finally, arrr, place more epoxy on t' nose cone at t' marks made earlier. Place t' tube over t' end o' t' nose cone and press down. This will push t' BT20 t' BT50 adapter up, and slide the BT50 t' BT60 adapter down. Aye aye! Blimey! Make sure t' tube is straight with t' nose cone. Avast, me proud beauty! Blimey! Let dry.
While t' transition section is drying, you can make t' nose cone section. Blimey! Take t' 3 BT20 tube and 4 equally spaced lines (every 90 degrees) along t' length o' t' tube. Begad! Blimey! From one end, me bucko, make marks at 1 on two opposite lines, and marks at 1 ½ on t' other two opposite lines. Arrr! Ahoy! Similar t' t' couplers, ya bilge rat, connect t' marks and carefully cut t' tube. Take t' BT19 tube and make 2 lines t' length o' t' tube on opposite sides.. Avast! I am not sure if BT19 is a real designation. (This tube is one you would normally get with an Estes rocket, matey, make a mark, matey, put glue inside a motor tube, matey, and use this tube t' push t' motor block in up t' t' mark, and then quickly remove to keep from gettin' stuck).
One piece o' t' BT20 will be slightly smaller. Ya scallywag! Blimey! This be t' top. Arrr! Avast, me proud beauty! Glue it onto t' BT19 linin' up t' pointed ends with t' marks on t' tube. Blimey! Well, blow me down! Glue t' 1 BT20 nose cone onto this end. Ahoy! Glue t' other BT20 section onto t' BT19, also linin' up t' pointed ends. Begad! Glue 2 BT20 t' BT50 adapters onto this end. Begad! I put t' first on so it only left a small 1/16 ~ 1/8 o' t' BT20 extending, matey, so t' adapters are mostly glued t' each other
Since t' 1.1 version was t' be t' separation point for ejection, I did nay want this nose t' slide down, ya bilge rat, so I created a lip by cuttin' 2 launch lug sections, me hearties, with t' tops cut at an angle, t' t' BT20 tube in line with the pointed ends. Avast! T' 2 balsa pieces cut earlier (¾ x ¼ x 1 pieces) were glued t' t' top on the shorter portion, 90 degrees from t' launch lugs.
I glued 2 toothpicks as antenna, but they smartly broke off. Avast! I would nay bother.
Once t' top be dry, me bucko, t' ensure stability, me bucko, me bucko, I added 1.5 ounces o' epoxy and BB pellets t' t' top.
T' win' pods can start assembly. Avast! Cut t' 18 BT20 in half. Well, blow me down! Begad! Draw a line along t' length o' t' 2 pieces. Make marks at 2 ¼ and 7 from one end. Arrr! Glue t' 2 BT55 couplers cut before at t' 2 ¼ and 7 locations. Ya scallywag! Note t' positions o' t' smaller and larger coupler segment and t' direction o' t' angled cuts. Make 2 o' these. Well, blow me down! Glue t' BT20 x 2 ¾ nose cones in. Begad! Blimey! Usin' a Dremel tool, ya bilge rat, matey, I cleaned up t' ends o' t' broken BT55 nose cones. Ya scallywag! Blimey! These I epoxied into t' other end t' look like a nozzle. I canted t' nozzle for appearance. Avast, me proud beauty! Let dry, then glue t' 2 x 2 ¾ x 4 x 1 fin t' t' other side. Avast! Aye aye! You should cut a notch into t' fin to fit over t' coupler.
Back t' t' main section, shiver me timbers, I slid t' larger BT80 coupler into t' BT80 tube with t' point even with t' end. Well, blow me down! I used this as a markin' template t' cut t' BT80 tube. Ahoy! Well, blow me down! I then spent an hour tryin' t' get t' coupler out o' t' tube, causin' me t' have t' cut ¼ strip off where a chewed it up tryin' t' push t' jammed thin' out. Blimey! JINX! Cut out t' BT80 tube at t' mark.
I used a piece o' paper and marked t' paper t' determine t' BT80 circumference. Begad! Sorry for changin' units, but I found it t' be almost exactly 21 cm. Ya scallywag! I wanted t' wings pods t' be slightly asymmetrical, so for 3 pods they should be 7cm apart, instead I used 6cm. Avast, shiver me timbers, me proud beauty! for t' 2 wings. Avast! I centered t' point with t' 6cm marks on t' point o' t' BT80 tube and marked t' tube. Extend these lines t' length o' t' tube. Glue t' motor mount into t' BT80 so t' 2 tubes are perpendicular t' t' point.
Since me motor mount was cardboard, I did coat it with epoxy for protection.
Glue t' launch lug assembly so t' aft o' t' dowel is 4 from t' end o' t' BT80 tube.
Glue t' win' pods t' t' BT80 so t' aft o' t' win' coupler is 1 from t' end o' t' BT80 tube on the 6cm lines.
Thee rudder pod is similar t' t' win' pods. Arrr! Mark and glue t' BT80 couplers t' t' BT55 tube at 2 ¾ and 9 7/8 positions. Begad! Glue t' smaller fin t' t' coupler and body tube (you will need t' cut a notch into t' fin for t' coupler) as shown.
T' 2 large fins should wait until this is glued t' t' BT80 tube. Mark and glue this pod t' t' BT80 tube, again with t' end o' t' coupler 1 from t' end o' t' BT80 tube. T' assist in t' stability, matey, glue t' left over segments o' t' skewers (from t' launch lug) betwixt t' aft BT80 coupler and t' BT80 tube. Blimey! T' 4 ½ BT5 tubes glue betwixt t' front coupler and t' BT80 tube, shiver me timbers, alignin' t' angled cut with t' coupler. Begad! Glue t' BT55 nose cone t' t' front.
Once dry, glue t' larger fins betwixt t' coupler sections on either side. T' make a nozzle for t' rudder, arrr, I sanded and roughed up t' 3 measuring/mixin' cups. Arrr! I cut 2 circles (1 3/8 diameter) from t' mailin' box. Well, blow me down! I beveled t' edge, shiver me timbers, and then glued one circle into 2 o' t' cups, ya bilge rat, then glued t' cups together (all usin' epoxy). Blimey! Aye aye! Once dry, this glued into t' aft o' t' BT55 tube. Begad! This nozzle I left straight.
Now t' complete t' top. Blimey! Arrr! Startin' at t' BT50 t' BT60 adapter, glue 2 large skewers and 2 toothpicks along the tube. Avast! Aye aye! Attach two o' t' 7 BT5 tubes in line with t' toothpicks startin' at 9 from t' top o' t' BT50 tube. Glue small plastic caps t' t' top o' these tubes. Glue t' nose assembly t' t' top. Avast, me proud beauty! T' launch lugs should be in line with t' BT5 tubes
T' shock cord be cut in half. Well, me bucko, blow me down! Blimey! A provided screw eye was attached t' t' 80K nose cone. Well, blow me down! Blimey! I used some o' t' paper to make a trifold t' attach t' shock cord t' t' main tubes. Avast, me proud beauty! Blimey! Usin' t' snap swivels, me bucko, me hearties, shiver me timbers, one 12 parachute was attached t' t' top and t' other was attached t' t' main tube shock cord.
For version 1.1, t' bent balsa was attached t' t' fins on t' wings. Blimey! Blimey! Blimey! T' V beveled standoffs were attached over the win' fins. A missile was made usin' t' last BT5 tube, t' fin can, t' display nozzle, me hearties, matey, and another small cap. Ahoy! Begad! Blimey! A missile rack was made with some ¼ x ¼ x 2 supports. Aye aye! Blimey! Finally, arrr, two 1 x 3 supports were made t' support t' missile. Aye aye! Your size may vary based on t' size o' your wifes cake savers (or other molds you may have used).
Flight:
Cuttin' things t' t' wire, arrr, t' night before I left for NERRF Im givin' this thin' a quick primer coat and 1
coat o' white. There were supposed t' be chances o' thunderstorms at NERRF and I was afraid t' field could be wet.
Water and cardboard dont mix. Well, blow me down! Arrr! So, me bucko, on Saturday, off t' NERRF 4 I went t' fly t' beast. Arrr! As I previously stated,
the rocket was designed t' eject t' parachutes from t' top (I did nay discuss about t' holes I drilled through the
80K nose cone. As I was preppin' t' rocket, I noticed t' parachutes were tight. This had me concerned. Avast, me proud beauty! Ahoy! I had not
glued t' 80K t' t' BT80 (fortunately), matey, so I taped this joint. Begad! Ahoy! Installed 2 D12-3 engines and got through t' RSO (he
did wince when I stated it only used two 12 parachutes). While waitin' t' load, I had several comments askin' how
I kept all t' small pieces on. Well, blow me down! I explained this was its first flight. Well, blow me down! We called a heads up flight. Well, blow me down!
They launched t' HPR rockets, started t' LPR and stopped halfway! They then went t' more HPR and did not come back t' t' LPR. Avast! My rocket sat on t' pad for over an hour. JINX! Finally, it launched. Ahoy! It danced a bit on t' pad t' rocket weight was really too heavy for a 3/16 rod. Also, I thought t' 3/16 rods were 4, but they were only 3. Well, blow me down! But, t' rocket went up nice and straight. Ya scallywag! But those tight chutes did nay come out. Arrr! The tape at t' transition let go crash. JINX!
I gathered up t' pieces. T' worst damage was t' wing. Ya scallywag! Arrr! At least t' corn had tasted good.
As I previously stated, me bucko, at this point I cut off t' 1.1 version o' t' launch lug and rebuilt it as version 1.2. I decided t' missile added too much weight, and I had no good place t' put it, arrr, shiver me timbers, ya bilge rat, so I left it off. Blimey! I cut off the standoffs for t' tongue depressors and mounted them upside down. Ahoy! Avast! It was also at this point when I changed t' t' shock cords t' connect at t' transition. So, arrr, I went back t' NERRF on Sunday. Ahoy! While loadin' t' engines, I had t' rocket leanin' against t' side o' me car. Arrr! Begad! I had t' grab something, me hearties, and it fell over and cracked a fin. Arrr! JINX! A quick glue repair and it was good t' go. Avast, me proud beauty! I did nay have t' wait this time, possible since I was now on t' ¼ rods. Again, me hearties, I requested a heads up. Well, blow me down! Well, blow me down! It launched beautifully straight, but when t' chutes came out t' one for t' main section tangled on t' launch lug skewers and landed hard. Begad! JINX! But at least t' top came down gently, matey, and landed in one o' t' water filled irrigation ditches. Begad! JINX! JINX! JINX! Fortunately, it be only t' very tip with t' epoxy/BB filling. Blimey! There was some minor damage t' t' rocket, matey, but it be repairable. Arrr! I was goin' t' give up, but then t' contest got extended a week, shiver me timbers, just enough time for some repairs and painting. Blimey! Ahoy!
My son and I went t' a local school yard and did 1 launch. Nice and straight, both chutes opened, matey, me bucko, and a safe recovery! I be nay goin' t' tempt fate with another launch. Avast! One thin' I would say, me hearties, shiver me timbers, t' rocket really needs 18 chutes minimum. Ya scallywag! Avast! While t' landin' did nay cause any damage, me bucko, arrr, I did wince as it looked rather hard. Well, blow me down! However, matey, I had to live with what I got t' 12 chutes.
Summary:
This was a great contest that challenged me. Avast! Despite all me JINXes, me hearties, I think I came up with somethin' special that
used almost all o' me parts. Arrr! I guess t' only thin' I didn't try is puttin' t' rest o' t' parts into a blender...
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