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