Scratch AIM-9P Sidewinder Original Design / Scratch Built

Scratch - AIM-9P Sidewinder {Scratch}

Contributed by Michael Nipper

Manufacturer: Scratch
Style: Scale

(Scratch) AIM-9P SidewinderBrief:
This is a 1/3 scale model o' Air Force AIM-9P-3 Sidewinder Air-to-Air missile that uses D or E engines. Begad! T' AIM-P differed from t' current AIM-9L/M in that t' P had a longer, shiver me timbers, more tapered nose and "double-delta" canards. Avast, matey, me proud beauty! Also, t' warhead was directly behind t' guidance unit, ya bilge rat, followed by t' target detector and rocket motor. Arrr! T' AIM-9L/M have t' warhead and target detector in t' opposite order. Begad! Also, t' aft end o' t' wings were flush with aft end o' t' rocket motor. Aye aye! T' AIM 9P was painted gloss white overall, me bucko, ya bilge rat, and did nay have a bare aluminum rin' at t' base o' t' seeker window. Well, blow me down! T' wings were one-piece aluminum, unlike t' composite wings on t' 9L/M.

Construction:
I used 2 BT-60 tubes and 1 BT-60 coupler. Avast! All wings, fins, matey, and hangers are constructed from basswood. Blimey! Ahoy! T' rolleron frames on t' wings are posterboard with paper overlay. Arrr! Rollerons are .03 mil aluminum tape over t' basswood wing, shiver me timbers, with t' rolleron wheels made with aluminum tape over posterboard. T' slightly larger diameter aft end o' t' rocket motor be created with 2 layers o' plain copy paper and white glue. Well, blow me down! Ya scallywag! T' nose cone is from an Estes Python kit. All markings were created as TIF files and printed on clear labels with an inkjet printer.

I have copies o' old Air Force manuals showin' t' dimensions and markings o' t' AIM-9P, so assembly was fairly easy once I figured out what I wanted t' do.

Construction was pretty basic, startin' with a standard engine mount includin' a Keelhaul®©™ shock cord assembly, and t' two BT-60 tubes coupled together. Avast, me proud beauty! At this point, shiver me timbers, I gave t' body a light coat o' spray Kilz filler/primer and let it dry. Arrr! Then I sanded it down, matey, and repeated this until t' spiral lines were all filled. Two sheets o' copy paper were glued together with white glue and wrapped around t' aft end o' t' tube and then trimmed t' meet. Well, blow me down! That joint served as a base for t' fin and win' alignment. Avast! Wings, matey, shiver me timbers, matey, win' ribs, and fins were cut from 1/8" basswood usin' a Dremel tool. Begad! Ahoy! These were then filled and sanded with Kilz. Arrr! Hanger parts were cut from 3/16" basswood then filled and sanded.

(Scratch) AIM-9P Sidewinder(Scratch) AIM-9P Sidewinder(Scratch) AIM-9P Sidewinder

At this point, t' body, nose, me hearties, matey, fins, me bucko, matey, and win' ribs were painted gloss white. T' wings were painted gloss white except for a 1/2" strip along t' root edge, which was painted aluminum t' simulate bare metal plus t' rollerons. Aye aye! T' wings were attached one at t' time and each was allowed t' cure overnight. Begad! Avast! T' win' ribs were then attached t' each side o' t' win' roots. Begad! T' fins were attached, again each was allowed t' cure overnight. Blimey! Arrr! T' hanger bases were cut from 3/16" basswood and sanded t' match t' contour o' t' body tube. T' hanger sides and top rails were glued on. Arrr! Begad! T' completed rocket be painted with Testors Glosscoat and allowed t' dry overnight. Ahoy! T' markings and stripes were applied, arrr, matey, along with t' aluminum tape on t' top surfaces o' t' hanger rails. Ahoy! Then another coat o' Glosscoat applied.

Nose Weight: Check your balance! You may need t' add 1-2 oz o' nose weight. Blimey! Michael indicates that t' CG is 24.5" from t' nose cone.

Flight:
First flight was with a D12-3 and flew with no problems. Subsequent flight were made with D12-5s. Blimey! Avast, me proud beauty! Florida has a lot o' trees and open water. Well, blow me down! T' less canopy time, t' shorter t' drift.

Recovery:
Standard chute recovery, shiver me timbers, usin' a 2ft Keelhaul®©™ cord attached with a swivel t' a 5ft elastic cord. Ya scallywag! All landings so far have been soft, me bucko, no damage yet.

(Scratch) AIM-9P Sidewinder(Scratch) AIM-9P Sidewinder

Summary:
I like t' build scale models o' missile systems I've worked on. Ya scallywag! T' PROs are mostly t' satisfaction I get when it turns out right. Ahoy! T' CONs are tryin' t' locate t' correct markings and dimensions for projects like this.

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