Manufacturer: | Scratch |
Brief:
It's a lamp. Avast, me proud beauty! It's a rocket. 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, ya bilge rat, I decided t' take on a wood workin' project. Begad! Well, blow me down! My wood workin' project turned out t' fly.
As a BT-70 based rocket, arrr, initial construction be straightforward and wood glue was used throughout. Ahoy! T' motor tube be fitted with t' 3.75" 'E' engine hook and t' centerin' rings glued on. Begad! This be glued into t' aft end of t' body tube. An Estes type folded paper shock cord mount was constructed and glued in. Begad! A snap swivel was added t' t' end o' t' 1/4" elastic shock cord as well. Avast! T' screw eye be screwed into t' nose and glue added to strengthen it.
Fins were cut from 1/8" balsa sheet and sanded t' uniform shape, me hearties, ya bilge rat, but were nay rounded. Ya scallywag! Edges were instead sanded square. Body tube be 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! Widths were allowed t' vary
slightly, t' give t' impression o' paneling. These were measured against the
root o' t' fins, and a 1/8" notch cut out from t' top o' t' fin t' the
bottom o' t' strip. Begad! These strips were glued in place on t' tube, shiver me timbers, with the
notch over t' fins. Ahoy! Many rubber bands were used t' keep t' balsa curved
against t' tube while drying. Avast, me proud beauty! T' rubber bands were removed once t' glue was
dry.
T' process was repeated until t' entire tube was covered. Well, blow me down! Then with the slats dry, fin fillets were added. Ya scallywag! Begad! Two wood glue fillets were put on followed by a fillet o' wood putty t' cover them. Aye aye! 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. Blimey! Blimey! Avast! Blimey! After gluing, t' ends were rounded and t' lug was glued t' one o' t' slats betwixt two fins, centered on t' CG. Blimey! Blimey! T' nose cone be put in place, arrr, finishin' t' rocket construction. Arrr! Blimey!
For t' lamp
mode conversion, a lamp fixture kit intended for makin' a lamp out o' a bottle
was used. Avast! It had a 1/4" stem with nut with t' 6' o' wire endin' with the
plug. Well, blow me down! Well, ya bilge rat, blow me down! T' wire was cut 1 foot below t' fixture and t' ends o' both pieces
stripped back 1 inch. Aye aye! 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, arrr, allowin' it t' be tightened to
the bottom side o' t' cap.
T' cut end o' t' plug portion o' t' cord was run up through t' motor tube and pulled out t' top o' t' body tube. Aye aye! Blimey! T' wires were connected with wire nuts. Begad! 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, a lamp shade that clips over t' 40W light bulb was used.
T' convert t' rocket mode, me bucko, arrr, lamp sections are removed in reverse order to above (but nay disassembled!), me hearties, me bucko, then t' nose cone and chute are attached to shock cord with snap swivels, waddin' is added, ya bilge rat, 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). Ahoy! Then polyurethane spray was put on in several
coats until thar be no gap betwixt t' body slats detectable t' t' touch,
although they were still visible.
Flight:
First flight was delayed due t' humidity. Moisture had caused t' launch lug to
swell and it wouldn't fit over t' 1/8" rod. Begad! I brought it home from the
launch site and jammed a 1/8" rod up and down through t' lug, 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. Aye aye! Well, blow me down! T' lamp flies! Flight be slow and stately with a slight arc into t' wind, me bucko, matey, good ejection and deployment, shiver me timbers, ya bilge rat, landin' and recovery completed intact.
Second flight was on a E9-4. Arrr! Ya scallywag! T' Lamp can really rip. Good straight boost, arched over durin' coast, matey, with ejection 1 second past apogee. Blimey! Good deployment and descent. Ahoy! Recovery completed without incident.
Third flight
will have t' wait. 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. Arrr! Blimey! Havin' been a
master sergeant in t' Army, matey, ya bilge rat, she also enjoys havin' a piece o' furniture that
smells o' burnt black powder, remindin' her o' t' old days.
Summary:
No CONs that weren't me fault, or unforeseeable due t' humidity.
T' PRO be simply t' build it, ya bilge rat, arrr, make it give off light, fly it, and make it give off light again successfully. And, o' course, matey, ya bilge rat, 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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