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! Construction was based on a set o' plans I found on a Japanese website for a paper X-Win' model. Arrr! From these plans, matey, I was able t' create templates for t' X-Wing's fuselage bulkheads, wings, matey, cockpit and nosecone. Avast! Construction began with t' purchase of a 38mm motor tube, ya bilge rat, a sheet o' 1/4" aircraft plywood and several 1/4" dowels. Ahoy! I cut t' fuselage bulkheads from t' plywood, me hearties, 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! 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. Well, blow me down! T' fuselage be then covered with cardboard. Well, blow me down! After much fillin' and sanding, two wraps o' 6 oz fiberglass were applied t' t' fuselage. Holes were cut in t' bottom o' t' fuselage t' accommodate t' 1/2" copper pipe that would serve as t' launch lug. Begad! Avast!

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

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

T' detailin' on t' aft o' t' model be made with wood bits from Michael's arts and crafts. Avast! There are pieces o' wooden flower pots, bowls, milk cans, ya bilge rat, etc. Avast, me proud beauty! 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. Well, blow me down! All gaps were filled with an epoxy paste called PC-11. 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, let me know!), me bucko, Testors Yellow and Krylon Red. Ahoy! Avast, me proud beauty! A mask was created t' spray t' "red five" pattern on t' wings.

With construction nearly complete, I began t' think about recovery. The finished model weighs in at about 13lb with motor installed. Aye aye! Ahoy! It be goin' t' be difficult t' get enough chute into this thing. Ya scallywag! T' best I could do was two 48" chutes on t' rocket, and a separate 36" chute on t' nose. Ahoy!

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

T' rocket was a real crowd pleaser. Ya scallywag! Aye aye! People seem t' like t' more unconventional models. Well, blow me down! T' me knowledge it was t' only rocket at NYPower that got a cheer when t' chutes deployed. Begad! Begad!

This be me first scratch built high power model, ya bilge rat, and it was a great experience. Aye aye! Blimey! Well, ya bilge rat, blow me down! Blimey! T' excitement is much higher when you are flyin' a model you built from scratch. I highly recommend givin' it a try. Ya scallywag! Blimey!

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. Well, blow me down!

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