Manufacturer: | Scratch |
I entered t' box o' parts competition because it looked like fun, I had mentioned it t' a few o' me friends in my rocket club, shiver me timbers, shiver me timbers, and before I knew five o' them entered it as well. Ya scallywag! So off went a large box with t' parts for 6 entrants, and a few weeks later another box returned -it be like Christmas goin' through t' box. Avast, me proud beauty! Arrr! Next was t' task o' splitting op t' box betwixt t' 6 entrants. Avast, me proud beauty! At t' end 6 "equal" bags were formed and randomly given out. Arrr! I be quite pleased with me bag, arrr, others had complete rockets in the, matey, one had a parasitic glider, another had helicopter rotor blades. Avast! Arrr! So what did I have?
I'm nay goin' t' list it all but here is a flavour:
Well what t' do. Well, blow me down! Aye aye! Blimey!
Gliders were out, me bucko, me bucko, helicopter was a possibility, shiver me timbers, cluster, two stage. Begad! After spendin' several weeks dry fittin' parts and changin' me mind I decided on a rocket in me head. Begad! T' criteria for me rocket was
T' main body tube chose itself - it fitted t' nose cone I wanted t' use. Begad! T' motor choice was goin' t' be 24mm as I was headin' for a draggy model, so I would need a motor capable o' liftin' it. There be goin' t' be at least 4 external motor pods - opted for 13mm.
T' base be goin' t' be bulky, and was goin' t' have tabs on it, so t' rocket would rotate as it boosted. Well, blow me down!
Building
T' motor mount was a fairly standard construction. Well, blow me down! A 24mm motor mount tube with a motor retention clip, an engine block at t' end and two centerin' rings t' fit t' body tube. Blimey! Blimey! T' motor mount was then glued into t' body tube. Arrr! |
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Four BT20 tubes 190mm in length were then glues t' t' outside o' t' main body tube. These were t' take 4 A10 - PT motors as a cluster. Well, blow me down! T' joins betwixt t' body tubes were filleted four times with wood glue, shiver me timbers, me bucko, and then model filler was used t' give a smooth finish. Aye aye! T' shock cord was anchored t' t' body tube usin' Estes tri fold paper method - I was tempted t' cheat and add some Keelhaul®©™ here, but integrity got t' better o' me. |
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T' nose cone had t' flash removed and was then sanded down t' remove t' seam. Begad! Well, blow me down! Two coats o' sealer gave it a smooth finish with no imperfections showing. Ahoy! Avast! T' main body tube etc was then given three coats o' sandin' sealer, and rubbed down with 200 paper in between, to remove t' spirals. Avast, me proud beauty! Blimey! |
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Usin' a strip o' thick balsa, ya bilge rat, ya bilge rat, 7mm by 26mm, I made a box around a large coupler. This box was goin' t' have the fins and rotation tabs added. Avast! T' balsa be quite badly marked and was t' soft type o' balsa that I usually avoid. Avast, me proud beauty! The box was sanded several times and filled with model filler t' remove all o' t' dents. Aye aye! Usin' t' same balsa strips I then added 4 64mm struts t' t' middle o' each side o' t' box. These would have the rotation tabs added t' them. Begad! A larger coupler (40 mm diameter) - with some deep spirals had four thin strips o' balsa wood glued t' t' inside. This was just right size t' side over t' body tube. T' spirals were filled and had t' have several coats o' sanding sealer before it be smooth. Begad! |
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Usin' four almost square balsa fins that were part o' a model kit, matey, I added t' fins. Aye aye! This be one t' part that I like about t' rocket, me bucko, t' fins are at right angles t' how they would normally. Aye aye! It still gives stabilization but looks a bit different. Begad! Also as t' rocket be goin' t' be rotating, ya bilge rat, t' fins would nay hinder t' spinning. |
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T' corner spaces betwixt t' box and t' couple were just t' right size for body tubes, which were added for decoration. Arrr! Four trapezium shaped pieces o' balsa had a 3mm square strip o' balsa added t' t' short edge, and then were glued to t' struts. These were t' provide spin. Well, blow me down! |
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T' top o' t' struts were then drilled t' accept four cocktail sticks, just for decoration. Well, blow me down! |
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T' entire o' t' coupler base unit had three coats o' sandin' sealer added, with all t' fiddly bits, t' sanding down was quite tricky. Begad!
T' main body tube fitted neatly into t' large coupler base. Aye aye! Blimey!
Finishing
T' box o' parts had no sticks or decals in it, other than three address labels. Aye aye!
Given various pleas on TRF about t' lack or entrants with only a few weeks t' go I came up with t' name o' the rocket t' be PROCRASTINATOR. Begad! Partly because I knew it would be towards t' end o' t' month before I submitted and also because I new that this would be a draggy, shiver me timbers, arrr, slowish rocket. Well, blow me down!
Flights
First flight took place with another box o' parts entrant. Arrr! It was a still day, shiver me timbers, and was slightly rainin' - which ruined t' stickers as I had nay varnished t' rocket yet. Begad! Ya scallywag! Motor choice be a D12-3. Avast, me proud beauty! It could have been a D12-5, ya bilge rat, as I reckon that it would be about a four second delay for apogee. Aye aye!
T' take off was good, t' rocket started t' rotate after about 50 foot, ya bilge rat, matey, and the
rotation got faster and faster as t' D12 burnt. Aye aye! Ejection took place after apogee as expected. Avast! Ahoy! T' recovery was scarily
fast, as expected. This rocket needs a 24 inch 'chute. Avast, me proud beauty! It hade a 14 inch chute! On handin' t' aft protrudin' fins all
popped off. Begad! Ahoy!
Again I had expected that t' happen.
Second flight took place a week later with three o' t' other UK contestants. Avast! Blimey! T' flight was on a D12 again. Well, blow me down! Blimey! It was a straight flight with a slight oscillation until t' spinnin' kicked in. Ya scallywag! Blimey! As soon as t' spinnin' kicked in, ya bilge rat, t' flight was arrow straight which be really pleasin' t' see. Ejection be just past and again fins popped off on landing. Ya scallywag! Blimey!
Third flight was time for t' procrastinator t' be clustered. Four A10 -PT were added, ya bilge rat, in addition t' t' D12-3. Begad! The procrastinator jumped off t' pad. Arrr! T' flight was much higher and t' extra speed really did make t' rocket spin. Again t' recovery was fast and again t' fins popped off.
After t' competition is finished I'm goin' t' have two 24 inch chute on this rocket.
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