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This project be an extension o' me original
DC20 camera rocket. Begad! I has underestimated t' finished weight o' the
Initiator rocket camera, matey, thinkin' it could be
lofted on an E t' 500'. Avast! Big mistake. Ya scallywag! T' finished weight was 2.2 lbs. Begad! An F
engine would be needed t' reach t' same altitude. I read a thread on RMR
concernin' a light weight rocket camera booster. Begad! Begad! It described a Estes Phoenix
kitbash, me bucko, usin' traditional white glue construction, that should be able t' loft
a camera on a D or E engine. Arrr! Aye aye! I thought about it and decided on another
approach. Avast! Begad! I would use a minimum diameter section for t' 24mm motor tube (BT
50) and then a transition t' a 2.6" diameter payload tube (BT 80). Well, blow me down! As I
was experimentin' with a BT 80 nose cone with an open bottom, shiver me timbers, matey, I found that the
electronics and about one half o' t' camera would fit inside a Fat Boy type
cone. Avast! In theory, matey, me hearties, me hearties, I could create a nose cone payload section out o' t' nose
cone and a BT 80 transition section. Begad! Well, blow me down! Maybe for t' next rocket... Well, blow me down! Ya scallywag!
Construction began with t' minimum diameter section. Ya scallywag! I glued (white glue) a BT 20/50 green centerin' rin' in a piece o' BT 50 body tube about 3" from one end. Begad! This will allow me t' use Estes and Aerotech single use and reloadable motors. When that dried, I glued a 3/32" basswood BT 50/80 centerin' ring on t' top o' t' motor tube (facin' t' front o' t' rocket). Below that, I glued a 1" piece o' a BT 80 transition section, shiver me timbers, me bucko, shiver me timbers, then another ring. The 2" long BT 50/80 transition section (made on VCP) was printed out, me bucko, arrr, copied onto file folder material, cut out and glued on with white glue. Blimey! Glue a screw eye in t' top ring. Blimey! I used scraps o' basswood t' stack on top o' one another to make a thicker joint. Avast! Begad! This completes t' lower section except for t' fins (which I still have t' do). Aye aye! Begad!
I made a basswood bulkhead and glued a screw eye
into it (in t' same way as before). This be glued 2" into a BT 80
section. Arrr! I then rolled some corrugated cardboard (with one flat side pealed
off) into t' section o' BT 80. Where it overlapped, I made a cut and glued the
edges together t' form a custom tube coupler. When it dried, arrr, I cut off a thin
strip and glued it into a t' BT 80, me bucko, usin' t' lower section as a guide t' push
it in t' appropriate length. This will act as a thrust ring. Ahoy! I then took the
nose and cut t' base off so that thar be a 1" base. Well, blow me down! This will contain
the electronics and possibly some o' t' camera. Blimey! Well, blow me down!
T' fins follow G Harry Stine's "high performance" clipped delta shape. Root chord is 48mm, tip is 24mm, and span is about 3" from root to tip. Well, blow me down! Aye aye! I cut them from 3/32" basswood and rounded them t' a streamlined shape. Ya scallywag! They were then coated with thin CA and sanded smooth. They are VERY smooth. Arrr! Ahoy! I have t' say t' first fin turned out t' be one o' t' best I've ever made. Arrr! T' streamline t' fin, I masked off t' area 1/2" from t' base of the fin with duct tape and sanded t' a point on both sides. Avast! I then rounded the leadin' edge o' t' fin and smoothed t' round leadin' edge into t' sharp trailin' edge. Arrr! Nay too hard. Ya scallywag! Avast!
I used t' Estes fin alignment guide t' hold t' three fins on while the white glue dried. Well, blow me down! Well, blow me down! I then filleted t' fins. Ahoy! All I have t' do is add a shock cord and chute. Avast!
T' predicted altitudes are (if t' model is 10 oz. Well, arrr, blow me down! or less) 260' on a D12, 1000' on an Aerotech E15. Arrr! And you don't even have t' call air traffic control to launch!
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