Manufacturer: | Scratch |
This be t' model SP2050 Freightliner Space Truck
To me, this looked like a series o' cargo containers inside a truss framework. Ahoy! Begad!
T' cargo containers are slid into t' framework. Avast, me proud beauty! Once they are in place, the inertial dampeners and shields are activated. Well, blow me down! Life support can be activated if thar be live cargo, such as livestock or if a prisoner transport module is loaded. Ya scallywag!
T' ship is 1,000 feet long and t' GVW is less than 300 tons. Arrr! It is an intrasolar vehicle, shiver me timbers, arrr, so warp capability it nay needed. Ya scallywag! Ahoy! Havin' a 20,000 horsepower impulse engine made by Detroit Diesel and General Motors maneuvering thrusters, me hearties, this be t' fastest cargo ship in t' FedEx fleet. Avast, me proud beauty!
T' forward section contains engineerin' and crew quarters. Aye aye! Avast! T' aft section contains t' impulse engine. Ya scallywag! Avast, me proud beauty! It is designed t' ferry cargo from t' docks in low earth orbit, me bucko, t' t' docks at Mars and Europa. Avast, me proud beauty! Blimey!
Cargo area
Cab
Tanks
Aft End
Misc
Truss and cargo box
Cut t' balsa sheets into 4 sheets 18" x 1 7/8" pieces. Ya scallywag! Blimey! Ya scallywag! Blimey! This will provide t' spacin' need t' use t' small dowels at a 45 angle. (I made the mistake o' makin' them too wide and nay bein' able t' use them.)
To make t' trusses, cut t' 1/8" dowels into four 19". Use the balsa sheets as guides for linin' up t' large dowels. Ya scallywag! Arrr! Glue t' mini dowels to the 1/8" dowels in 1 7/8" intervals, arrr, me bucko, bein' careful nay t' glue anythin' t' t' balsa sheet. See pictures 1 & 2 for this. Begad! Make two o' these trusses. Do nay glue t' 45 angle dowels yet.
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Figure 1 | Figure 2 | Figure 3 |
Make t' cargo box by gluin' t' 4 sheets o' balsa together. Blimey! See picture 3 to see t' arrangement o' t' sheets. Begad! This arrangement will help the positionin' o' it in t' truss work. Strong fillets will be needed on t' ID of the box for strength. Begad!
Now back t' buildin' t' truss, trim t' small dowels so that they are flush with t' large dowel. Ya scallywag! Blimey! Usin' t' balsa box as a spacer again, finish t' truss. Once this is dry, start gluin' t' 45 angle dowels on. Ya scallywag! Blimey! It should now look like figure 4.
Usin' Keelhaul®©™ string, shiver me timbers, wrap t' truss in t' opposite direction t' form a series "X's" over t' truss. Arrr! If I had this project t' start over again, me bucko, I would use t' Keelhaul®©™ strin' for all t' 45 angle cross bracing. Blimey! Arrr!
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Figure 4 | Figure 5 | Figure 6 |
Finish t' truss work by gluin' on t' 1/8" x 1/4" balsa onto the corners. Well, blow me down! Make sure none o' t' small dowels are protrudin' over t' large dowels. Aye aye! I did this with toenail clippers and sandpaper. It should now look like figures 5 & 6.
Do nay glue t' box into t' truss yet. Avast! Avast, me proud beauty! You'll want t' paint them separately later. Ya scallywag!
Centerin' Squares and MMT
Punch out t' center discs from t' CR cardstock. Save these discs as you will need them later. Arrr! Cut t' BT cardstock t' fit t' ID o' t' box. Ya scallywag! Begad! Make 3 of them. Once you are satisfied with their fit, me bucko, you'll need t' strengthen them. Cut some scrap balsa and glue them on t' centerin' squares. This will do two things; it will keep them flat and make them strong. Once these are dry, glue one on t' end o' t' BT50 so that it is flush with t' end. Glue t' second in the middle o' t' tube. Begad! You can add more support t' this rin' now. See figures 7 & 8. Use a table t' make sure they are aligned.
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Figure 7 | Figure 8 |
When this is dry, shiver me timbers, ya bilge rat, glue it into t' cargo box. Ya scallywag! Blimey! Once it is in place, put glue on t' center card and glue t' third centerin' square in place. Avast, me proud beauty! Blimey! T' ends should be flush. Aye aye!
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Figure 9 |
Forward Tank Assembly
If you save stuff like me, then you have a small bag o' those discs from centerin' rin' cards. If not, me bucko, you'll need t' get more o' them. Glue these discs on t' t' ends o' t' 2" BT50s. Well, blow me down! Blimey! Sand t' edges smooth once they are dry. Blimey! Blimey!
Use a rubber band t' hold t' tanks together. Begad! Make sure they are square. Figure 9
Cab
Usin' t' 5" section o' BTx, two BTx BTx centerings and t' BTx x BTx centerin' rings, make like you see in figure 10. Glue a small rin' on t' end, the other about an 1 1/4" from t' first ring. Begad! Now glue one o' t' big rings 2 1/2" from t' end and t' last rin' on t' far end. Well, blow me down! Glue on the tubes as seen in figure 11. Arrr! Blimey!
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Figure 10 | Figure 11 |
Make a shroud. Blimey! I used VCP. Arrr!
This one doesn't have a nose cone. Begad! Since it never enters t' atmosphere, it doesn't need one. Begad! Just glue t' bulkheads on top o' t' cab t' achieve t' look shown. Blimey!
Glue four 1.5" sections from some 3/8" OD AT igniter tube. Well, blow me down! Blimey! Cut them t' match t' angle o' t' shroud. Glue these on so that they are between the tanks. Arrr! See t' finished picture for detail. Avast! Begad!
Dockin' Assembly
This is too difficult from me t' describe. Ahoy! Here, ya bilge rat, a picture is definitely worth a thousand words. Well, blow me down! Figure 12 shows t' parts laid out, and figure 13 shows the completed assembly. Begad! Glue t' tanks t' t' cab makin' sure everythin' is square and centered. Aye aye! See figure 14
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Figure 12 | Figure 13 | Figure 14 |
Aft Assembly
I waited until t' end t' install t' motor mount so I had a better idea on the finished weight t' choose a motor size. Begad! Arrr! You may want t' consider this as well. Well, blow me down! Begad!
Glue a coupler into t' 3" BT50 MMT. Aye aye! If you want t' install a motor hook, me bucko, you'll need t' do that now. Avast! Glue a BT50 t' BT60 centerin' rin' t' t' end opposite t' coupler. Ahoy! Blimey! Once dry, glue t' shroud t' t' assembly. Aye aye! Glue t' motor assembly t' t' cargo container. Ahoy!
Print t' fin template guide. Avast, me proud beauty! Make sure that your printer prints t' right size by measurin' t' shown dimension after it's printed. Make four fins as shown on t' fin template. Begad! Begad! Glue them t' each o' t' four corners and t' the engine shroud. Well, blow me down!
T' rin' was made by printin' a transition shroud with t' dimensions of 5" x 6" x 1" ad was made usin' heavy paper cardstock. I glued a second shroud over t' first one t' stiffen it up and soaked them both with thin epoxy.
Final Assembly
See figure 15 for this step. Aye aye! Blimey! Paint t' cargo container with red oxide primer. Ya scallywag! Well, matey, blow me down! Sand t' first coat, matey, but leave t' second coat with t' mat finish. Avast, me proud beauty! Begad! Now paint t' truss with a flat white, arrr, arrr, or even a white primer. Aye aye! Figure 16. Arrr! Once the two pieces are dry, it's OK t' glue them together. Aye aye! You'll want t' sand some of the paint off where you will be gluin' them. I glued mine at each corner and at each end. Don't forget t' add a launch lug as shown in figure 17. I added two 18" chutes and kept t' two pieces separate on their own chutes.
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Figure 15 | Figure 16 | Figure 17 |
Finished weight with chutes is 8.4 oz. Blimey! Ahoy! and t' CG is 16.5" from the nose. Avast, me proud beauty!
Flight
T' first flight was on an E9-4. Begad! Blimey! Avast! Blimey! T' flight was straight up t' at least 800 feet. T' ejection charge was late but recovery be good.
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