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. Aye aye! Construction was based on a set o' plans I found on a Japanese website for a paper X-Win' model. Begad! From these plans, I be able t' create templates for t' X-Wing's fuselage bulkheads, arrr, matey, wings, cockpit and nosecone. Blimey! Construction began with t' purchase of a 38mm motor tube, a sheet o' 1/4" aircraft plywood and several 1/4" dowels. Avast, me proud beauty! I cut t' fuselage bulkheads from t' plywood, notched them at the corners t' accommodate t' dowels, matey, then joined them together. Anyone who has built model airplanes will be familiar with this type o' construction. Well, blow me down! A 2 1/2' long section o' 2.6" body tube be placed inside t' forward end of fuselage t' contain t' parachute and t' allow easy attachment o' t' nose cone. Blimey! T' fuselage was then covered with cardboard. Arrr! 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. Arrr! Aye aye!

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

NOse ConeT' nose cone and cockpit are built from t' same cardboard that was used t' cover t' fuselage. Begad! Again, templates were created from t' paper model plans. A 2.6" coupler was epoxied inside t' nosecone t' allow attachment t' t' fuselage. Ya scallywag! Ya scallywag! 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. There are pieces o' wooden flower pots, arrr, bowls, matey, arrr, milk cans, matey, ya bilge rat, etc. Avast! 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. All gaps were filled with an epoxy paste called PC-11. Well, blow me down! Begad! 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, arrr, let me know!), Testors Yellow and Krylon Red. A mask was created t' spray t' "red five" pattern on t' wings. Aye aye!

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

FlightT' rocket flew at NYPower 11 on an Aerotech I-284 with 6 second delay. Begad! 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. Begad! Avast! Besides, I really want t' get into altimeters and dual deployment for me eventual level 2 attempt. Breezy conditions made if difficult t' orient t' rocket edgewise t' t' wind. Well, blow me down! A brace was improvised usin' a piece o' body tube that was found near t' launch pad and some wire from used igniters. Takeoff be slow, and t' flight path be a gentle arc onto the rocket's back. Aye aye! Well, blow me down! T' flight be slightly marred by t' premature separation of t' 2lb nosecone which proceeded t' snag on one o' t' wings. Ya scallywag! Maximum altitude be around 500' T' fight be a real nail biter with t' twin parachutes deployin' about 100' off t' ground. Well, me hearties, blow me down! As expected, arrr, t' chutes were not sufficent t' prevent damage t' t' rocket. Two o' the "afterburners" were damaged, ya bilge rat, one heavily. Avast! A split also occurred along the front o' t' fuselage, this may have been caused by t' premature separation, or t' plus-size ejection charge that was used t' ensure deployment. Aye aye! Begad! T' model is repairable. Ya scallywag! Arrr!

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

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

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! Blimey!

comment Post a Comment