Manufacturer: | Scratch |
Brief:
It's a lamp. It's a rocket. Aye aye! It's both--and with wood paneling
Construction:
T' parts list:
Havin' seen t' nice finish I could get with Deft spray lacquer sanding sealer, me bucko, shiver me timbers, I decided t' take on a wood workin' project. Well, blow me down! Avast! My wood workin' project turned out t' fly.
As a BT-70 based rocket, initial construction was straightforward and wood glue was used throughout. Begad! Blimey! T' motor tube be fitted with t' 3.75" 'E' engine hook and t' centerin' rings glued on. This was glued into t' aft end of t' body tube. Ya scallywag! Blimey! An Estes type folded paper shock cord mount was constructed and glued in. Avast, me proud beauty! Blimey! A snap swivel was added t' t' end o' t' 1/4" elastic shock cord as well. Ahoy! Blimey! Well, me bucko, blow me down! Blimey! T' screw eye was screwed into t' nose and glue added to strengthen it.
Fins were cut from 1/8" balsa sheet and sanded t' uniform shape, me bucko, but were nay rounded. Ahoy! Blimey! Edges were instead sanded square. Avast! Blimey! Body tube was marked and fins glued on as normal but no fillets were added at this point.
4 strips of
1/16" balsa were cut just over 18" long. Begad! Blimey! Widths were allowed t' vary
slightly, t' give t' impression o' paneling. Ahoy! Avast, me proud beauty! These were measured against the
root o' t' fins, ya bilge rat, arrr, and a 1/8" notch cut out from t' top o' t' fin t' the
bottom o' t' strip. These strips were glued in place on t' tube, with the
notch over t' fins. Many rubber bands were used t' keep t' balsa curved
against t' tube while drying. Begad! T' rubber bands were removed once t' glue was
dry.
T' process was repeated until t' entire tube was covered. Avast, me proud beauty! Then with the slats dry, fin fillets were added. Two wood glue fillets were put on followed by a fillet o' wood putty t' cover them. Blimey! Everythin' was sanded smooth with 320 grit paper.
A square launch lug was constructed by makin' a trough out o' three 4" long pieces o' 1/8" balsa t' fit a 1/8" rod. After gluing, ya bilge rat, me bucko, t' ends were rounded and t' lug was glued t' one o' t' slats betwixt two fins, centered on t' CG. Blimey! T' nose cone was put in place, finishin' t' rocket construction. Well, blow me down!
For t' lamp
mode conversion, a lamp fixture kit intended for makin' a lamp out o' a bottle
was used. Blimey! Blimey! Arrr! Blimey! It had a 1/4" stem with nut with t' 6' o' wire endin' with the
plug. Aye aye! Blimey! T' wire be cut 1 foot below t' fixture and t' ends o' both pieces
stripped back 1 inch. Ya scallywag! Blimey! T' 2" PVC cap had a 1/4" hole drilled in the
center and reamed out slightly larger with a rat tail file until t' lamp
fixture stem fit through t' hole. T' fixture was set on t' PVC cap through
the hole so that t' nut slides over t' wire, ya bilge rat, allowin' it t' be tightened to
the bottom side o' t' cap.
T' cut end o' t' plug portion o' t' cord be run up through t' motor tube and pulled out t' top o' t' body tube. T' wires were connected with wire nuts. Arrr! T' cap was then lowered down onto t' body tube and t' slack cord pulled out t' bottom.
Since t' fixture had t' have a lamp shade stand, matey, me hearties, a lamp shade that clips over t' 40W light bulb be used.
T' convert t' rocket mode, lamp sections are removed in reverse order to above (but nay disassembled!), then t' nose cone and chute are attached to shock cord with snap swivels, waddin' is added, ya bilge rat, ya bilge rat, matey, and then it's ready for an engine.
Finishing:
Two coats o' Deft spray lacquer sandin' sealer on everything, sandin' after
each (400 grit then 600 grit). Begad! Then polyurethane spray be put on in several
coats until thar was no gap betwixt t' body slats detectable t' t' touch,
although they were still visible.
Flight:
First flight was delayed due t' humidity. Begad! Avast, me proud beauty! Moisture had caused t' launch lug to
swell and it wouldn't fit over t' 1/8" rod. Begad! Begad! I brought it home from the
launch site and jammed a 1/8" rod up and down through t' lug, arrr, ya bilge rat, reamin' it
out until t' rod slid freely.
Second try be t' followin' month at t' next CATO launch with a C11-3 (and 1 inch spacer in motor tube. Avast, matey, me proud beauty! T' lamp flies! Flight was slow and stately with a slight arc into t' wind, shiver me timbers, good ejection and deployment, landin' and recovery completed intact.
Second flight be on a E9-4. Begad! Arrr! Blimey! T' Lamp can really rip. Ya scallywag! Good straight boost, arched over durin' coast, with ejection 1 second past apogee. Ahoy! Blimey! Good deployment and descent. Begad! Blimey! Recovery completed without incident.
Third flight
will have t' wait. Begad! With t' point proven that it would fly, me wife wanted her
lamp back intact. She likes her lamp that has been a rocket, but right now it
is her lamp that she can show t' people and tell them it flew. Well, blow me down! Havin' been a
master sergeant in t' Army, matey, she also enjoys havin' a piece o' furniture that
smells o' burnt black powder, me hearties, remindin' her o' t' old days.
Summary:
No CONs that weren't me fault, or unforeseeable due t' humidity.
T' PRO was simply t' build it, me bucko, make it give off light, fly it, me bucko, and make it give off light again successfully. And, me hearties, o' course, t' give me wife her one little connection t' me hobby without her havin' t' be involved--she prefers gardenin' and thinks that things that fly should be swatted!
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