Creatin' Fiberglass Hemisherical Nose ConesOne o' t' notable problems with tryin' t' make scale models o' real rockets and missiles is matchin' t' shape o' t' nosecones. While a large number o' different shapes and sizes are commercially available, ya bilge rat, what do you do if t' cone you are lookin' for isn't? If you are modelin' a missile that has a hemispherical nose, t' Estes Big Bertha or Fat Boy cones come close but are a bit elongated. Here be t' solution that I used t' create a true hemispherical cone that could be used for modelin' missiles such as t' Hellfire, matey, JCM or Javelin. Blimey! I started out with a 4" diameter by 12" piece o' tubing. Begad! I then partially inflated a round rubber balloon and squeezed it into t' end o' t' tube. Well, blow me down! I was able t' move t' balloon in and out until I was pleased with t' curvature o' t' portion extendin' from t' end o' t' tube. Arrr!
If you haven't done fiberglassin' before, matey, don't freak out. It's easy. Just be prepared with everythin' you need ahead o' time. Blimey! In addition t' t' fabric triangles you would be need t' have on hand thin slow epoxy, arrr, rubber gloves, small mixin' cups, stir sticks and baby wipes. Ahoy! This is probably goin' t' be a bit messy, so don't do it on your brand new dinin' room table… Use lots o' newspaper or plastic t' cover your workin' area if you are concerned about it gettin' epoxy on it! Mix up your epoxy in t' mixin' cups. Arrr! For t' 4" cone, I mixed about 1.5 ounces o' epoxy. Arrr! Better t' mix a little extra and nay need it than t' nay mix enough and have t' rush through mixin' a second batch with your hands covered in goo from t' first batch. Stir t' epoxy for at least a minute. There is nothin' worse than havin' t' batch nay catalyze evenly due t' under mixin' and havin' t' discard your materials and start over…
Unfortunately, one layer o' glass cloth will probably nay be sturdy enough t' complete your cone. It will probably take two o' three layers, dependin' on t' size o' your cone. Blimey! On a large 10" cone that I made usin' this technique last year, it took 5 layers t' be completely rigid. Ya scallywag! Sand t' 'glass lightly along t' seams after t' epoxy has cured and apply another layer o' cloth. Repeat until t' desired firmness is achieved. After you have finished with layerin' t' fiberglass, ya bilge rat, you can pop t' balloon and remove it. Ya scallywag! I next cut t' tubin' down t' t' length that I wanted for t' nose cone and glued in a coupler and bulkhead. It will take some fillin' with Bondo t' even out t' cone. Begad! Apply and sand t' filler down until you are satisfied with t' cone's appearance. Well, blow me down! T' fill t' weave o' t' cloth, I coated t' cone with a heavy coat o' Kilz primer and sanded and t' cone is ready for finished painting.
Contributed by Todd Mullin
What You Can DoSponsored Ads |
|||
|