Modification Silver Comet XL Modification

Modification - Silver Comet XL {Modification}

Contributed by Stefan Jones

Manufacturer: Modification

Rocket PicBrief:
Silver Comet XL - My Silver Comet kitbash project began with someone else havin' a bilge-suckin' bit o' luck. Ahoy! An unknown party at a DARS launch (de Anza College, arrr, Cupertino CA) in early 1998 launched a Silver Comet with an Aerotech E motor. Begad! Maybe t' motor had too long a delay. Blimey! Maybe t' parachute was packed too tight. Begad! In any case, me hearties, me bucko, t' model took a nose dive into t' unforgivin' DARS' "AsphaltDrome." I didn't witness t' crash. I did see t' unlucky owner tossin' t' kit into t' trash. Yes, shiver me timbers, I admit it: I salvaged t' kit from a trash barrel. Well, blow me down! Begad! My kitbash project started with a bashed kit. Avast, me proud beauty! You, o' course, can do this kitbash on an existin' Silver Comet, or one you build from a kit. Avast, me proud beauty! Aye aye! No crash necessary. Well, blow me down! Avast! Aside from t' totally mashed cone, and 3" or so o' crumpled body tube, shiver me timbers, arrr, t' unlucky space yacht actually looked in pretty good shape. Avast, me proud beauty! I decided t' do somethin' *cool* with it. Ahoy! Nay right away, arrr, me hearties, as it turned out, shiver me timbers, matey, but after a year and a half in a box, I took a second look at t' model and began t' plan. Avast, me proud beauty! On me to-do list:

  • Replacement Nose Cone
  • Longer Body Tube
  • Niftier Fins
  • Less Cheap Lookin' Decals

Modifications:
Before gluin' on t' coupler and extra tubing, me bucko, I carefully peeled off t' transparent self-stick decals and stuck them on wax paper. Blimey! They were in fairly good shape. Well, blow me down! Waste not, want not! Since t' original shock cord mount was lost in t' crash, I built one into t' coupler usin' t' old "double slit" method. I used a few inches o' Keelhaul®©™ thread as a leader, me bucko, me hearties, and about 3' o' 1/4" elastic band as a shock cord. T' fins o' t' crashed model were in OK shape, but I never really liked t' shape o' t' things. Begad! They don't look like Olde Fashionede space Man-O-War fins. Ahoy! Ya scallywag! Rather than remove them, I simply added pods t' their tips! T' pods are made from three teardrop-shaped pieces o' 1/8" balsa, arrr, arrr, glued together into a stack and sanded t' have nice round edges. Begad! T' middle layer has a roughly triangular shape snipped out o' it, me hearties, so that t' finished pod could be slipped over t' existin' fin tips.

Construction:
If you start with an intact kit, arrr, you won't have t' worry about t' first step! T' replacement cone (with molded cockpit) is nay a standard part, ya bilge rat, arrr, but at t' time I did t' project Estes did make it available through their customer service line. Blimey! Shippin' was inexpensive and fairly fast. Ya scallywag! Parts for t' second step were easy t' find. Ya scallywag! I purchased a pack o' Estes BT-80 tubes and a coupler (from t' Large Coupler Pack) from a discount distributor. I added a total o' about 4" t' t' front o' t' model. Ahoy! (In me case I needed more tubin' than that, arrr, t' replace t' crumpled tube.)

PodsRe-finishin' t' Silver Comet was a real chore. Avast, me proud beauty! I thought at first that I'd preserve t' original paint job and just paint t' fin tips and new body tube section. Avast! But after sanding, arrr, matey, sealing, me hearties, spiral-seam-fillin' and sprayin' t' new parts, t' contrast betwixt new and old was too obvious! I ended up sandin' and primin' t' old parts and doin' what I could t' fill t' fins. Avast, me proud beauty! T' result was pretty good. I was never good at achievin' "chrome" like silver finishes, shiver me timbers, but after buffin' and a few coats o' Future floor wax t' finish looks really nice. Ya scallywag! Sort o' a "silver plastic" effect. Ya scallywag! When t' paint was dry, I reapplied t' decals. Aye aye! Blimey! T' original kit calls for t' "portholes" and hatch t' be placed on one side and t' logo decal on t' other. Ahoy! I decided that this was too unbalanced looking. Aye aye! So I called Estes Customer Service and tried t' order another set o' decals. Avast! They refused t' sell me one . Avast! . Aye aye! Begad! . Avast! they sent me one for free! God bless 'em! I placed t' new set o' porthole and hatch decals on t' port side o' t' ship, shiver me timbers, and t' logo detail along t' top. Avast, me proud beauty! As a finishin' touch, arrr, I used dark blue acrylic paint t' color in t' center o' each porthole and t' hatch's window. T' result is an amazin' improvement over t' original look. Begad! Avast! (If you've got a Silver Comet, me hearties, try it!) I tried paintin' in t' cockpit windows, with limited success. I eventually settled on usin' pieces o' blue Trim Monokote. Aye aye! This wasn't much better, shiver me timbers, and took a lot o' work. I think I'd try harder t' get a good paint finish if I had t' do it over again.

Flight:
T' Silver Comet XL made its maiden voyage at t' August 2000 LUNAR launch. Blimey! I used a D12-3 motor and a two standard 24" Estes plastic parachutes. Begad! Begad! T' comments I got from t' launch volunteers and people on line for RSO inspection were very ego-boosting. Begad! Avast, me proud beauty! T' launch was a great success, too: T' model be very stable, perhaps due t' t' pods actin' as "drag members" far aft o' t' center o' gravity. Arrr! T' parachute ejected near-apogee and landed safely.

Summary:
Although finishin' t' kit was more work than it should have been, arrr, I had fun with this project and really liked t' results. Begad! Although officially out o' production, shiver me timbers, you may still be able t' nab a Silver Comet kit from hobby stores or webstores. Go for it!

Other:
T' only problem I've encountered with t' model: T' soft balsa I used for t' pods tends t' crunch easily. I've made lots o' dents in them in normal handling. Begad! Havin' used harder balsa, and perhaps a coatin' o' epoxy, might have made them a bit sturdier.

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