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. Avast, me proud beauty! Begad! Construction be based on a set o' plans I found on a Japanese website for a paper X-Win' model. Avast! Arrr! From these plans, I was able t' create templates for t' X-Wing's fuselage bulkheads, matey, wings, ya bilge rat, cockpit and nosecone. Aye aye! Begad! Construction began with t' purchase of a 38mm motor tube, ya bilge rat, me bucko, a sheet o' 1/4" aircraft plywood and several 1/4" dowels. Avast, me proud beauty! I cut t' fuselage bulkheads from t' plywood, arrr, notched them at the corners t' accommodate t' dowels, then joined them together. Aye aye! Anyone who has built model airplanes will be familiar with this type o' construction. Ya scallywag! 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. Ahoy! T' fuselage be then covered with cardboard. After much fillin' and sanding, ya bilge rat, two wraps o' 6 oz fiberglass were applied t' t' fuselage. Aye aye! Holes were cut in t' bottom o' t' fuselage t' accommodate t' 1/2" copper pipe that would serve as t' launch lug. Ya scallywag!

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

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

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

Durin' final assembly, ya bilge rat, 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. Begad! All gaps were filled with an epoxy paste called PC-11. Ahoy! Ahoy! 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!), matey, me hearties, Testors Yellow and Krylon Red. Arrr! 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. Aye aye! Begad! The finished model weighs in at about 13lb with motor installed. Avast, me proud beauty! It be goin' t' be difficult t' get enough chute into this thing. Blimey! T' best I could do was two 48" chutes on t' rocket, and a separate 36" chute on t' nose. Begad!

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

T' rocket was a real crowd pleaser. Avast! 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 was me first scratch built high power model, and it was a great experience. T' excitement is much higher when you are flyin' a model you built from scratch. Avast, ya bilge rat, me proud beauty! I highly recommend givin' it a try. Arrr!

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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