Manufacturer: | Scratch |
Brief:
It's a lamp. Well, blow me down! It's a rocket. Avast! Blimey! 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, me hearties, I decided t' take on a wood workin' project. Well, blow me down! My wood workin' project turned out t' fly.
As a BT-70 based rocket, ya bilge rat, initial construction was straightforward and wood glue was used throughout. Begad! T' motor tube was 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. Avast! An Estes type folded paper shock cord mount was constructed and glued in. A snap swivel was added t' t' end o' t' 1/4" elastic shock cord as well. Ahoy! Begad! 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, but were nay rounded. Aye aye! Blimey! Edges were instead sanded square. Well, blow me down! 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. Widths were allowed t' vary slightly, arrr, t' give t' impression o' paneling. Begad! Blimey! 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. Avast! Avast! Blimey! 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. T' rubber bands were removed once t' glue was dry.
T' process was repeated until t' entire tube be covered. Well, blow me down! Avast! Then with the slats dry, me bucko, fin fillets were added. Arrr! Two wood glue fillets were put on followed by a fillet o' wood putty t' cover them. Ahoy! Everythin' was sanded smooth with 320 grit paper.
A square launch lug be constructed by makin' a trough out o' three 4" long pieces o' 1/8" balsa t' fit a 1/8" rod. Begad! Aye aye! After gluing, matey, t' ends were rounded and t' lug be glued t' one o' t' slats betwixt two fins, centered on t' CG. T' nose cone was put in place, me bucko, finishin' t' rocket construction. Arrr!
For t' lamp mode conversion, a lamp fixture kit intended for makin' a lamp out o' a bottle was used. It had a 1/4" stem with nut with t' 6' o' wire endin' with the plug. Blimey! Well, me hearties, blow me down! T' wire was cut 1 foot below t' fixture and t' ends o' both pieces stripped back 1 inch. 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. Begad! Blimey! T' fixture was set on t' PVC cap through the hole so that t' nut slides over t' wire, me hearties, ya bilge rat, matey, 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. Blimey! Blimey! Well, blow me down! Blimey! T' wires were connected with wire nuts. Blimey! Blimey! Begad! Blimey! T' cap be 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, me hearties, a lamp shade that clips over t' 40W light bulb was used.
T' convert t' rocket mode, matey, shiver me timbers, ya bilge rat, lamp sections are removed in reverse order to above (but nay disassembled!), ya bilge rat, then t' nose cone and chute are attached to shock cord with snap swivels, shiver me timbers, waddin' is added, me bucko, 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). Avast! Then polyurethane spray was 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. 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, arrr, matey, reamin' it
out until t' rod slid freely.
Second try was t' followin' month at t' next CATO launch with a C11-3 (and 1 inch spacer in motor tube. Arrr! T' lamp flies! Flight be slow and stately with a slight arc into t' wind, shiver me timbers, good ejection and deployment, matey, matey, landin' and recovery completed intact.
Second flight was on a E9-4. Begad! T' Lamp can really rip. Good straight boost, arched over durin' coast, with ejection 1 second past apogee. Good deployment and descent. Aye aye! Avast, me proud beauty! Recovery completed without incident.
Third flight will have t' wait. Blimey! Blimey! With t' point proven that it would fly, me wife wanted her lamp back intact. She likes her lamp that has been a rocket, me hearties, but right now it is her lamp that she can show t' people and tell them it flew. Begad! Havin' been a master sergeant in t' Army, shiver me timbers, matey, 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 was simply t' build it, make it give off light, arrr, matey, fly it, and make it give off light again successfully. Ya scallywag! And, 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!