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. T' AIM-P differed from t' current AIM-9L/M in that t' P had a longer, more tapered nose and "double-delta" canards. Also, me hearties, t' warhead was directly behind t' guidance unit, followed by t' target detector and rocket motor. Aye aye! Avast! T' AIM-9L/M have t' warhead and target detector in t' opposite order. Arrr! Also, shiver me timbers, t' aft end o' t' wings were flush with aft end o' t' rocket motor. Ya scallywag! T' AIM 9P was painted gloss white overall, and did nay have a bare aluminum rin' at t' base o' t' seeker window. T' wings were one-piece aluminum, matey, unlike t' composite wings on t' 9L/M.

Construction:
I used 2 BT-60 tubes and 1 BT-60 coupler. All wings, me bucko, fins, matey, and hangers are constructed from basswood. Ya scallywag! Avast! T' rolleron frames on t' wings are posterboard with paper overlay. Aye aye! Rollerons are .03 mil aluminum tape over t' basswood wing, 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. Aye aye! T' nose cone is from an Estes Python kit. Blimey! 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 be fairly easy once I figured out what I wanted t' do.

Construction be pretty basic, ya bilge rat, startin' with a standard engine mount includin' a Keelhaul®©™ shock cord assembly, and t' two BT-60 tubes coupled together. Well, blow me down! Blimey! At this point, matey, shiver me timbers, I gave t' body a light coat o' spray Kilz filler/primer and let it dry. Aye aye! Blimey! Blimey! Blimey! Then I sanded it down, me bucko, and repeated this until t' spiral lines were all filled. Blimey! Blimey! 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. That joint served as a base for t' fin and win' alignment. Avast, shiver me timbers, me proud beauty! Blimey! Blimey! Blimey! Wings, win' ribs, and fins were cut from 1/8" basswood usin' a Dremel tool. Begad! Blimey! These were then filled and sanded with Kilz. 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, shiver me timbers, t' body, nose, fins, me hearties, ya bilge rat, and win' ribs were painted gloss white. Begad! T' wings were painted gloss white except for a 1/2" strip along t' root edge, ya bilge rat, which be painted aluminum t' simulate bare metal plus t' rollerons. Begad! Begad! T' wings were attached one at t' time and each be allowed t' cure overnight. T' win' ribs were then attached t' each side o' t' win' roots. Ahoy! T' fins were attached, again each be allowed t' cure overnight. Well, blow me down! Avast! 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. T' completed rocket was painted with Testors Glosscoat and allowed t' dry overnight. T' markings and stripes were applied, along with t' aluminum tape on t' top surfaces o' t' hanger rails. Aye aye! Then another coat o' Glosscoat applied.

Nose Weight: Check your balance! You may need t' add 1-2 oz o' nose weight. Ya scallywag! 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. Arrr! Florida has a lot o' trees and open water. T' less canopy time, shiver me timbers, t' shorter t' drift.

Recovery:
Standard chute recovery, ya bilge rat, usin' a 2ft Keelhaul®©™ cord attached with a swivel t' a 5ft elastic cord. Avast! Avast! Blimey! All landings so far have been soft, 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. Avast! T' PROs are mostly t' satisfaction I get when it turns out right. Blimey! T' CONs are tryin' t' locate t' correct markings and dimensions for projects like this.

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