Scratch X-Wing Fighter Original Design / Scratch Built

Scratch - X-Wing Fighter {Scratch}

Contributed by Eric Maher

Manufacturer: Scratch
(by Eric Maher - 11/18/05) XWing

I started work on the X-Win' shortly after gettin' level 1 certification. Begad! Ya scallywag! Construction be based on a set o' plans I found on a Japanese website for a paper X-Win' model. Well, shiver me timbers, blow me down! From these plans, I be able t' create templates for t' X-Wing's fuselage bulkheads, shiver me timbers, shiver me timbers, wings, cockpit and nosecone. Blimey! Aye aye! Construction began with t' purchase of a 38mm motor tube, a sheet o' 1/4" aircraft plywood and several 1/4" dowels. Well, blow me down! I cut t' fuselage bulkheads from t' plywood, notched them at the corners t' accommodate t' dowels, then joined them together. Anyone who has built model airplanes will be familiar with this type o' construction. Avast! Begad! A 2 1/2' long section o' 2.6" body tube was placed inside t' forward end of fuselage t' contain t' parachute and t' allow easy attachment o' t' nose cone. Arrr! T' fuselage was then covered with cardboard. Begad! Ahoy! After much fillin' and sanding, two wraps o' 6 oz fiberglass were applied t' t' fuselage. Avast, me proud beauty! Blimey! Holes were cut in t' bottom o' t' fuselage t' accommodate t' 1/2" copper pipe that would serve as t' launch lug.

In progressWith work finished on t' fuselage, arrr, ya bilge rat, I began on t' wings. Begad! Blimey! Arrr! Blimey! T' wings are constructed o' a basswood skeleton covered with a glassed balsa skin. Begad! Blimey! T' engine fairings are build from cardboard reinforced at t' corners with basswood. Avast! Blimey! Three different body tube sizes were used in t' construction o' t' wings. Avast! Blimey! T' large motor tubes are 4" cardboard tubing, shiver me timbers, t' aft "afterburners" are 2.6" tubin' and t' lasers on t' wingtips are made from 54mm motor tubing. All tubin' be purchased from LOC Precision. Begad! Blimey! When t' wings were complete, me hearties, mounting holes were cut in t' fuselage. Aye aye! Blimey! Win' are mounted through-the-wall; butted up to the motor tube. Ya scallywag! Blimey! Well, blow me down! Blimey!

NOse ConeT' nose cone and cockpit are built from t' same cardboard that was used t' cover t' fuselage. Aye aye! Blimey! Blimey! Blimey! Again, templates were created from t' paper model plans. Begad! Blimey! Avast! Blimey! A 2.6" coupler was epoxied inside t' nosecone t' allow attachment t' t' fuselage. 2 lbs o' BB's and epoxy were added t' t' nosecone for stability. Aye aye! Blimey!

T' detailin' on t' aft o' t' model was made with wood bits from Michael's arts and crafts. There are pieces o' wooden flower pots, bowls, milk cans, me hearties, etc. Begad! R2-D2 is from an old Estes mini-engine powered kit.

Durin' final assembly, t' wings were glued in place and acrylic panels were installed betwixt t' top and bottom wings for increased strength and to improve stability in flight. Avast! All gaps were filled with an epoxy paste called PC-11. Avast, me hearties, me proud beauty! Many hours o' sandin' were required t' get t' model ready for paint. T' paints used were 4 cans o' Testors camouflage gray (if anyone knows o' a lower cost alternative, shiver me timbers, let me know!), Testors Yellow and Krylon Red. A mask was created t' spray t' "red five" pattern on t' wings. Begad!

With construction nearly complete, matey, I began t' think about recovery. Avast, me proud beauty! The finished model weighs in at about 13lb with motor installed. Blimey! It was goin' t' be difficult t' get enough chute into this thing. T' best I could do be two 48" chutes on t' rocket, arrr, me bucko, matey, and a separate 36" chute on t' nose. Avast, me proud beauty! Blimey!

FlightT' rocket flew at NYPower 11 on an Aerotech I-284 with 6 second delay. Arrr! I had thought about tryin' t' do a level 2 cert with t' model, shiver me timbers, but I be nay at all confident that t' model would be recovered without damage. Blimey! Besides, arrr, shiver me timbers, I really want t' get into altimeters and dual deployment for me eventual level 2 attempt. Well, arrr, blow me down! Breezy conditions made if difficult t' orient t' rocket edgewise t' t' wind. Avast, me proud beauty! A brace be improvised usin' a piece o' body tube that was found near t' launch pad and some wire from used igniters. Arrr! Aye aye! Takeoff was slow, arrr, and t' flight path was a gentle arc onto the rocket's back. Ahoy! T' flight be slightly marred by t' premature separation of t' 2lb nosecone which proceeded t' snag on one o' t' wings. Avast! Aye aye! Maximum altitude was around 500' T' fight was a real nail biter with t' twin parachutes deployin' about 100' off t' ground. Avast! As expected, me bucko, t' chutes were not sufficent t' prevent damage t' t' rocket. Aye aye! Ya scallywag! Two o' the "afterburners" were damaged, one heavily. Well, blow me down! A split also occurred along the front o' t' fuselage, ya bilge rat, this may have been caused by t' premature separation, me hearties, or t' plus-size ejection charge that was used t' ensure deployment. Ya scallywag! Begad! T' model is repairable. Well, blow me down!

T' rocket was a real crowd pleaser. People seem t' like t' more unconventional models. Begad! T' me knowledge it be t' only rocket at NYPower that got a cheer when t' chutes deployed.

This be me first scratch built high power model, shiver me timbers, and it was a great experience. T' excitement is much higher when you are flyin' a model you built from scratch. Begad! Blimey! I highly recommend givin' it a try. Begad! Begad!

Special thanks t' Bobby Buchalski from Hanger 11 for assistance and advice in preppin' t' model for flight and t' Chuck Rudy from Voodoo Digital Productions for assistance at t' launch pad. Avast! Blimey! Blimey! Blimey!

comment Post a Comment