FSI Viking V Clone

Clone - Viking V {Scratch}

Contributed by Bill Eichelberger

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Published: 2012-01-16
Manufacturer: Clone
Style: Ring/Tube/Cone Fin

Brief

T' Vikin' 5 be t' last in the Viking series, a tube-finned family o' performance birds from Flight Systems, Inc.  I was lookin' at http://www.ninfinger.org/rockets/rockets.html for somethin' different and seldom seen to build before NARAM 53.  I'd previously built a BMS Vikin' 1 Clone o' t' Month and was familiar with t' Vikin' 2, 3 and 4 models, me hearties, but I'd never noticed t' Vikin' 5.  T' picture in t' 1990 FSI catalog doesn't really give an idea o' t' size o' this bird, and had I nay looked at t' specs, I might have passed it over.  When I noticed that t' finished model stood almost 4 feet tall, I took another look at t' plans at YORP and started figurin' out what I had on had versus what I needed t' order from Semroc.

Components

  • 18" BT-55
  • 18" BT-60
  • BNC-60AH balsa nose cone (Semroc)
  • TA-5560A balsa transition (Semroc)
  • 36" length Keelhaul®©™ shock cord
  • 36" length 1/4" sewin' elastic shock cord
  • 6" BT-50 engine tube
  • Estes "E" engine hook
  • 2 - 5055 centerin' rings
  • 2050 engine block
  • 2 medium snap swivels
  • medium screw eye

Construction

If you've built or cloned an FSI kit in t' past, you know that the instructions are somewhat minimal, arrr, but easily understood if you have a few builds under your belt.  That said, I didn't even bother t' print t' instructions http://www.oldrocketplans.com/fsi/fsi1024a/fsi1024a.htm from YORP because t' whole project is pretty easily understood with one look at t' exploded view.  I did use t' patterns for t' tube fin fairings and launch lug standoff. 

 

Finishing

Because t' catalog pictures were black and white, matey, and because I've never seen a Vikin' 5 in t' flesh, I felt free t' pick me own color scheme.  Bein' a simple-minded sort when it came t' anythin' artistic, matey, I decided t' go with a simple-minded blue and white paint scheme.  My Vikin' has Valspar Gloss Royal Blue tube fins, me bucko, transition, and nose cone, with Valspar gloss white body tubes.  All tube and balsa surfaces were primed with Valspar primer, arrr, ya bilge rat, coated with thinned Elmer's Fill & Finish, two coats, sandin' betwixt each coat.  After another coat o' Valspar primer, arrr, matey, t' rocket be assembled, shiver me timbers, arrr, and t' tube fins sprayed.  When t' tube paint was dry, I covered them completely in and out with blue maskin' tape, ya bilge rat, then sprayed t' upper and lower body tubes gloss white.  T' nose cone and transition were sprayed together usin' short sections o' scrap tubing.  Much o' t' paintin' took place t' night before t' first planned flight at NARAM 53, and when I peeled the maskin' tape from t' tube fins, arrr, they had marks on them from t' tape.  It be only noticeable from up close and from ten feet it could hardly be seen, shiver me timbers, arrr, so I decided against resprayin' it and went t' bed.  By mornin' t' marks were gone, shiver me timbers, leavin' me t' guess that t' paint hadn't completely dried when I'd taped t' tube fins up.  (They still smelled fairly strongly o' paint fumes.)  If I were t' do this build over, matey, t' one thin' I'd likely change would be t' paint t' tube fins before gluin' them t' t' fairings, but in t' end t' process was easy enough due t' t' size o' t' components.

Construction Score: 5

Flight

As I'd hoped, matey, t' first "flight" o' t' Vikin' 5 would be at t' Thursday openin' o' t' sport range at NARAM 53.  Loaded with an E9-6, t' rocket looked great on t' pad, even without t' decals that I'd yet t' think up.  I hooked it up, took some on pad glamour shots for t' review, matey, and headed back t' t' shelter t' switch lenses.  I selected burst mode on t' camera, got everythin' set with t' auto-focus, matey, and gave t' signal t' start t' countdown.

Everythin' looked normal at first with t' ignition, me hearties, me bucko, but then I be sightin' t' whole thin' through t' eyepiece since t' screen occasionally becomes balky on me NEW Olympus.  T' explosion when t' engine CATOed took me by surprise, but I managed t' keep me finger on t' shutter release for two bursts before t' shock took over.  I looked up t' see t' lower section cartwheelin' across t' sport range while t' upper section came down under chute.  My initial horror was almost instantly replaced with excitement because I knew I'd caught at least some o' t' action on t' camera.  We walked out t' survey t' damage and check for fires, ya bilge rat, findin' only ghostly smoke emittin' from t' grass all around t' scene.  Both launch lugs had been ripped off, one be found on t' rod, me bucko, t' other in t' grass.  T' lower section was still smokin' with the Keelhaul®©™ and 1/3 o' t' elastic still attached.  T' upper section came t' earth twenty feet away by parachute.  T' almost completely cleaned out casin' was found in t' opposite direction o' t' rocket carcass, matey, havin' completely bypassed t' engine hook.  Other than t' ripped off launch lugs and some scorched paint near t' top and bottom o' t' lower body tube, me bucko, damage seemed minimal.  That night I reapplied t' launch lugs and planned t' fly it first thin' on Friday.  When Friday arrived, I again planned t' make it me first flight, me hearties, but when I went t' install t' motor, the engine tube slid back up into t' body.  Needless t' say, matey, I needed a pinch hitter for t' openin' flight. 

T' damage appeared t' be mostly to t' centerin' rings, both o' which had delaminated due t' t' force o' t' CATO.  T' repair involved pullin' as much o' t' old tube and centerin' rin' as possible, shiver me timbers, which I accomplished by usin' a needle-nose plier, grabbin' t' end o' t' motor tube, me bucko, and twisting.  The motor tube pulled out easily when the rings continued t' delaminate.  Since I had tied t' Keelhaul®©™ behind t' forward centerin' ring, arrr, I wound up with a loop o' Keelhaul®©™ that be pre-sized t' t' motor tube, a nice convenience.  I peeled out what was left o' t' aft ring, then sanded everythin' as smooth as possible.  Since t' forward rin' had partially peeled away, I was able t' glue t' new rings around t' mid-point o' t' new motor tube.  T' front o' t' motor tube would easily slide through what was left o' t' forward ring, ya bilge rat, and t' new centerin' rings could be glued in place forward o' t' old aft ring.  T' Keelhaul®©™ be mounted betwixt t' two new rings, arrr, with t' forward rin' notched t' allow t' cord t' pass through.  Everythin' be mounted with a thick coat o' white glue, and t' repair seemed solid.

Almost six months later, I finally managed t' fly t' Vikin' 5 at a windy TORC launch in South Charleston, Ohio.  As with everythin' else I flew that day, matey, t' Vikin' 5 windcocked severely, me bucko, matey, burned on t' E9-4 for what seemed like an eternity, then recovered deep in t' cornfield, even with t' heavily reefed chute.  Even though I knew where t' landin' spot was, matey, it still helped t' have t' chute out thar blowin' around.  (I actually passed it, then spotted it on t' return trip.)  Glad that's over with. Avast, me proud beauty! ;-)

Recovery

Flight Rating: 5

Summary

Pro: Big, matey, bulky tube-finned bird with plenty o' internal room for t' chute and shock cord.  FSI birds are cool, arrr, but seldom seen at t' pads.  Looks great leavin' t' pad.

Con: Decals were minimal.

Overall Rating: 5
Related Products

Flights

comment Post a Comment