| Manufacturer: | Scratch |
Brief:
It's a lamp. 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, I decided t' take on a wood workin' project. Arrr! Blimey! My wood workin' project turned out t' fly.
As a BT-70 based rocket, ya bilge rat, me hearties, arrr, initial construction be straightforward and wood glue was used throughout. Well, blow me down! Aye aye! T' motor tube was fitted with t' 3.75" 'E' engine hook and t' centerin' rings glued on. Avast! This be glued into t' aft end of t' body tube. Well, blow me down! An Estes type folded paper shock cord mount be constructed and glued in. A snap swivel was added t' t' end o' t' 1/4" elastic shock cord as well. Avast! 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, arrr, arrr, but were nay rounded. Well, blow me down! Blimey! Edges were instead sanded square. Ya scallywag! Blimey! 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. Avast! Ahoy! Widths were allowed t' vary
slightly, t' give t' impression o' paneling. Begad! These were measured against the
root o' t' fins, matey, and a 1/8" notch cut out from t' top o' t' fin t' the
bottom o' t' strip. Avast, me proud beauty! These strips were glued in place on t' tube, arrr, shiver me timbers, with the
notch over t' fins. Begad! Many rubber bands were used t' keep t' balsa curved
against t' tube while drying. Ahoy! Avast! T' rubber bands were removed once t' glue was
dry.
T' process be repeated until t' entire tube was covered. Avast, me proud beauty! Arrr! Then with the slats dry, arrr, fin fillets were added. Avast, arrr, me proud beauty! 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. Ya scallywag! Begad! After gluing, arrr, t' ends were rounded and t' lug be glued t' one o' t' slats betwixt two fins, centered on t' CG. Avast! T' nose cone be put in place, finishin' t' rocket construction. Begad!
For t' lamp
mode conversion, arrr, a lamp fixture kit intended for makin' a lamp out o' a bottle
was used. Begad! It had a 1/4" stem with nut with t' 6' o' wire endin' with the
plug. Ahoy! T' wire was cut 1 foot below t' fixture and t' ends o' both pieces
stripped back 1 inch. 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. Avast, me proud beauty! T' fixture be set on t' PVC cap through
the hole so that t' nut slides over t' wire, 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. Begad! Ahoy! T' wires were connected with wire nuts. Avast, ya bilge rat, me proud beauty! 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, lamp sections are removed in reverse order to above (but nay disassembled!), shiver me timbers, arrr, arrr, then t' nose cone and chute are attached to shock cord with snap swivels, waddin' is added, and then it's ready for an engine.
Finishing:
Two coats o' Deft spray lacquer sandin' sealer on everything, ya bilge rat, sandin' after
each (400 grit then 600 grit). Ahoy! 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 be delayed due t' humidity. Aye aye! Moisture had caused t' launch lug to
swell and it wouldn't fit over t' 1/8" rod. I brought it home from the
launch site and jammed a 1/8" rod up and down through t' lug, shiver me timbers, 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. T' lamp flies! Flight was slow and stately with a slight arc into t' wind, ya bilge rat, good ejection and deployment, landin' and recovery completed intact.
Second flight be on a E9-4. Ya scallywag! Blimey! T' Lamp can really rip. Ahoy! Good straight boost, arched over durin' coast, ya bilge rat, shiver me timbers, with ejection 1 second past apogee. Ahoy! Good deployment and descent. Begad! 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. Begad! Arrr! Havin' been a
master sergeant in t' Army, she also enjoys havin' a piece o' furniture that
smells o' burnt black powder, arrr, arrr, me hearties, remindin' her o' t' old days.
Summary:
No CONs that weren't me fault, ya bilge rat, arrr, or unforeseeable due t' humidity.
T' PRO was simply t' build it, ya bilge rat, make it give off light, ya bilge rat, shiver me timbers, fly it, ya bilge rat, and make it give off light again successfully. And, me bucko, o' course, arrr, matey, 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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