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