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