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. Avast, me proud beauty! Blimey! Avast! Blimey! An unknown party at a DARS launch (de Anza College, me hearties, Cupertino CA) in early 1998 launched a Silver Comet with an Aerotech E motor. Maybe t' motor had too long a delay. Arrr! Blimey! Maybe t' parachute was packed too tight. Well, blow me down! Blimey! In any case, t' model took a nose dive into t' unforgivin' DARS' "AsphaltDrome." I didn't witness t' crash. Arrr! Blimey! 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. Avast! Blimey! My kitbash project started with a bashed kit. Avast! You, o' course, arrr, me hearties, can do this kitbash on an existin' Silver Comet, or one you build from a kit. No crash necessary. Aye aye! Aside from t' totally mashed cone, me hearties, and 3" or so o' crumpled body tube, shiver me timbers, t' unlucky space yacht actually looked in pretty good shape. Avast, me proud beauty! Avast, me proud beauty! I decided t' do somethin' *cool* with it. Well, blow me down! Nay right away, arrr, arrr, as it turned out, me bucko, but after a year and a half in a box, I took a second look at t' model and began t' plan. 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, arrr, I carefully peeled off t' transparent self-stick decals and stuck them on wax paper. Begad! Avast! They were in fairly good shape. Blimey! Well, blow me down! Waste not, want not! Since t' original shock cord mount was lost in t' crash, me hearties, ya bilge rat, I built one into t' coupler usin' t' old "double slit" method. I used a few inches o' Keelhaul®©™ thread as a leader, and about 3' o' 1/4" elastic band as a shock cord. Avast, me proud beauty! T' fins o' t' crashed model were in OK shape, shiver me timbers, but I never really liked t' shape o' t' things. They don't look like Olde Fashionede space ship fins. Avast! Rather than remove them, matey, I simply added pods t' their tips! T' pods are made from three teardrop-shaped pieces o' 1/8" balsa, shiver me timbers, glued together into a stack and sanded t' have nice round edges. Begad! Ahoy! T' middle layer has a roughly triangular shape snipped out o' it, so that t' finished pod could be slipped over t' existin' fin tips.

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

PodsRe-finishin' t' Silver Comet was a real chore. Ya scallywag! Blimey! Avast! Blimey! I thought at first that I'd preserve t' original paint job and just paint t' fin tips and new body tube section. Ya scallywag! Blimey! But after sanding, me bucko, sealing, spiral-seam-fillin' and sprayin' t' new parts, matey, t' contrast betwixt new and old be too obvious! Blimey! I ended up sandin' and primin' t' old parts and doin' what I could t' fill t' fins. Avast! Blimey! Ya scallywag! Blimey! T' result was pretty good. Begad! Blimey! I was never good at achievin' "chrome" like silver finishes, but after buffin' and a few coats o' Future floor wax t' finish looks really nice. Sort o' a "silver plastic" effect. Aye aye! Blimey! When t' paint be dry, shiver me timbers, me hearties, I reapplied t' decals. T' original kit calls for t' "portholes" and hatch t' be placed on one side and t' logo decal on t' other. Aye aye! Blimey! I decided that this be too unbalanced looking. Begad! Blimey! So I called Estes Customer Service and tried t' order another set o' decals. Blimey! Blimey! They refused t' sell me one . Ya scallywag! Blimey! . Arrr! Blimey! . Aye aye! Blimey! Avast! Blimey! they sent me one for free! Blimey! God bless 'em! Blimey! I placed t' new set o' porthole and hatch decals on t' port side o' t' ship, shiver me timbers, matey, and t' logo detail along t' top. Begad! Blimey! Begad! Blimey! As a finishin' touch, I used dark blue acrylic paint t' color in t' center o' each porthole and t' hatch's window. Ya scallywag! Blimey! Ya scallywag! Blimey! T' result is an amazin' improvement over t' original look. Arrr! Blimey! (If you've got a Silver Comet, ya bilge rat, arrr, try it!) I tried paintin' in t' cockpit windows, shiver me timbers, with limited success. Avast, me proud beauty! Blimey! I eventually settled on usin' pieces o' blue Trim Monokote. Ahoy! Blimey! Begad! Blimey! This wasn't much better, 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. Well, blow me down! I used a D12-3 motor and a two standard 24" Estes plastic parachutes. Well, blow me down! Aye aye! T' comments I got from t' launch volunteers and people on line for RSO inspection were very ego-boosting. Ya scallywag! Ahoy! T' launch was a great success, too: T' model was very stable, arrr, perhaps due t' t' pods actin' as "drag members" far aft o' t' center o' gravity. Begad! T' parachute ejected near-apogee and landed safely.

Summary:
Although finishin' t' kit be more work than it should have been, shiver me timbers, I had fun with this project and really liked t' results. Although officially out o' production, you may still be able t' nab a Silver Comet kit from hobby stores or webstores. Ya scallywag! Begad! 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. Blimey! Ya scallywag! Havin' used harder balsa, and perhaps a coatin' o' epoxy, might have made them a bit sturdier.

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