Constructin' t' THOY Phoenix

This is a high power rocket kit originally developed by Tiffany Hobbies O' Ypsilanti (Michigan?), shiver me timbers, and now produced by Rocket R&D. Blimey! Ahoy! T' suggested motors run from G t' H, but unless you build very light, G’s might work only on absolu

tely calm days. Arrr! Ahoy! I won this kit in an online raffle sponsored by Magnum Hobbies almost three years ago, me hearties, but waited until this winter t' build it.

Components

T' included parts are o' very high quality. T' 4" body tube is thick-walled kraft paper, ya bilge rat, with marks showin' where t' fin slots and launch lug need t' go. Avast, me proud beauty! You must cut t' slots yourself. T' fins (8) and centerin' rings (2) are beautiful, made o' 1/8" plywood and cut perfectly. Arrr! T' fins are through t' wall, and t' tabs go all t' way t' t' motor mount. T' top centerin' rin' comes with a braided steel shock cord anchor pre-mounted, ya bilge rat, arrr, and needs only a spot o' epoxy t' finish it off. T' nose cone is from ACE, and interestingly enough has a screw cap located on t' bottom instead o' t' customary plastic loop. Begad! Aye aye! T' motor mount tube is 38mm. Ya scallywag! Completin' t' kit is a ½" launch lug , me hearties, matey, a nine foot length o' nylon webbin' (1" wide) shock cord, shiver me timbers, ya bilge rat, a 36" nylon parachute, a page o' self-adhesive decals for military style detailing, me bucko, clay for nose weight, along with two pages o' instructions, shiver me timbers, me hearties, one o' which is a general guide t' paintin' and decal placement. Well, blow me down! Well, arrr, blow me down! T' instructions are basic but complete, and include some decent diagrams for assembly steps. Aye aye! Arrr! It is assumed that you have some buildin' experience. Blimey! Begad! Apparently, at some point a different nose cone was supplied, me bucko, because t' instructions call for tyin' t' shock cord t' t' plastic loop on t' nosecone, matey, which, as noted above, me bucko, doesn't exist. T' decals were t' weakest part o' t' kit. Ahoy! Ya scallywag! I don't much like self-adhesive decals anyway, ya bilge rat, but these were among t' worst I've seen. T' printin' be smudged in several places and peelin' in others (age may have been a problem). Avast! T' finished product is acceptable from 6 feet away, me bucko, which is good enough for me, but t' decals really disappoint close up. Blimey! A little effort t' re-create your own water slide decals t' match, ya bilge rat, or t' have them cu

stom made is an option t' consider.

Construction

For t' most part, construction be straightforward. Ahoy! T' fin slots were cut usin' a new x-acto blade and a straightedge. Take your time and don't try t' cut all t' way through at once and you'll be done before you know it.

T' instructions give measurements t' sand t' fins t' their true scale shape, ya bilge rat, but after slightly goofin' up t' first fin, I just rounded them all off. Elmers Fill ‘n’ Finish was used t' seal and fill t' grain on t' fins and t' fill t' body tube spirals.

To me, shiver me timbers, t' biggest worry about any Phoenix model are those aft fins. Blimey! Blimey! They just look like a pop off waitin' t' happen. Avast! Avast! Blimey! T' further strengthen this area, I added a third centerin' rin' t' sandwich t' tabs o' t' lower fins. Blimey! Begad! Blimey! This extra rin' was made o' two thicknesses o' balsa, glued together with t' grains runnin' perpendicular, me bucko, and then thin CA be soaked into t' wood. Ahoy! Blimey! Blimey! Very light and strong.

One trick I've found w

henever workin' with fin tabs that go all t' way t' t' motor tube is t' trim a small bit o' t' corner where it's goin' t' meet a centerin' ring. Ahoy! This way there’s room for any glue fillet that might already be present. See t' illustration for what I mean.

T' instructions are very clear, and make assemblin' t' motor mount and fins a two-step process, first t' motor mount, shiver me timbers, shiver me timbers, me bucko, then t' fins. I'll describe here how I did it, which was t' combine t' steps into one. Blimey! Arrr! T' reason I did it me way be t' strengthen t' bottom fin section usin' that extra centerin' ring.

Before doin' this, matey, arrr, me bucko, drill two small holes in t' balsa rin' and thread some strin' through them. Aye aye! Aye aye! These are your handles, me bucko, and you'll see what they're for in a minute.

First thin' is t' glue t' front centerin' rin' into place on t' motor tube as indicated in t' instructions. When dry, matey, I slipped t' balsa rin' over t' back end o' t' motor tube without gluin' it, me hearties, me hearties, me bucko, just t' center t' motor tube correctly. Begad! Ya scallywag! Then I set t' rocket upright and drizzled more glue around t' joint where t' top centerin' rin' meets t' body tube. Ya scallywag! Avast! Tilt t' tube slightly t' make sure t' entire edge o' t' rin' is glued t' t' tube wall.

Once dry, arrr, I turned t' rocket over again and, usin' those strin' handles, removed t' bottom centerin' ring. Begad! Blimey! Now I glued t' forward set o' fins into place, arrr, makin' sure that they were aligned correctly. Aye aye! Well, arrr, blow me down! Blimey! Fillet well on t' inside where t' tab comes through t' slot and at t' motor tube joint.

At this point, I had t' straighten t' forward fins, me bucko, because two o' them had developed a slight bow from leadin' t' trailin' edge. Begad! T' way I did this was t' clamp a straight steel bar along t' length o' t' fin, me hearties, which forced it straight. Aye aye! Ya scallywag! Next came punchin' small holes into t' body tube along t' fin root, me hearties, arrr, which allows t' epoxy t' flow into them and create ‘rivets’ as it cures. T' final step was layin' a good fillet o' epoxy along t' fin root. Begad! T' glue held t' entire fin root straight, which removed t' warp from t' plywood. Each side o' each fin was done t' same way.

Time for t' second centerin' rin' (the one made from balsa) and bottom fins. Arrr! Place t' centerin' rin' on t' tube, and let it slide down past t' bottom fin tab slots. Begad! Avast! Next, insert t' bottom fins through t' slots, mix up a small batch o' 5 minute epoxy, and use t' strin' t' pull t' centerin' rin' up tight against t' bottom fin tabs. Ya scallywag! Add small dabs o' epoxy betwixt t' fin tabs along t' body tube wall and motor tube, ya bilge rat, so that once t' epoxy cures t' rin' is in place. T' fins are still nay glued into place, shiver me timbers, just t' balsa centerin' ring, which acts as a ‘floor’ for t' lower fin tabs (see t' picture).

T' bottom fins must be aligned with t' top fins before gluin' them into place. I used a straight wooden yardstick clamped along t' length o' t' upper fin, then clamped in turn t' t' bottom fin t' get t' alignment needed. Begad! Blimey! This lined up t' fin roots, but t' ensure that t' two fins both were at t' same angle t' t' tube, me hearties, shiver me timbers, I used an Estes 2-piece rod, and clamped one half on each side o' t' fins, shiver me timbers, runnin' with t' leadin' edge (see t' picture). Well, blow me down! Blimey! Then I glued t' fin and fin tab into position. Begad! Blimey! Fillet everythin' well, inside and out. Arrr! Blimey! Let it dry, then do t' next fin. Begad! Blimey! When you're done, you'll have a rock solid assembly for t' bottom fins, and they'll be perfectly aligned.

Once dry, ya bilge rat, I fastened t' bottommost centerin' rin' into place, and filleted it well. Instead o' centerin' t' launch lugs betwixt t' fins as called for in t' instructions, shiver me timbers, matey, I offset th

em slightly closer t' one side, so that I could install rail buttons as well.

On t' t' nosecone. After lightly sandin' t' remove t' mold seam, shiver me timbers, as well as t' provide some ‘tooth’ for t' finish t' hold on to, matey, I packed t' supplied clay into t' nosecone. Begad! Arrr! Blimey! Usin' a dowel as a ramrod, me hearties, t' clay was pushed as far as possible towards t' tip. Avast! Next I drilled several 1/16" holes through t' nosecone at t' level o' t' clay. Arrr! Avast, me proud beauty! Blimey! Coverin' these holes with maskin' tape, I then poured a batch o' 15 minute epoxy into t' nosecone, matey, on top o' t' clay. Arrr! Once again, me bucko, t' epoxy ran into t' holes, creatin' rivets as it cured and ensurin' that t' clay would stay right at t' top o' t' nose. Arrr! Blimey! Once cured, shiver me timbers, matey, t' maskin' tape was removed, me bucko, and t' holes and rivets were sanded smooth.

Finishin'

I covered t' entire rocket with 3 coats o' ruddy brown automotive primer, shiver me timbers, me hearties, lightly sandin' betwixt coats. Aye aye! Avast, me proud beauty! This primer has a high solids content, ya bilge rat, and filled t' last o' t' spiral grooves and wood grain. Avast, me proud beauty! Begad! Read t' can though! T' brown primer that I used be leftover from some auto bodywork I did a while back, and had a dryin' time o' 5 days, shiver me timbers, arrr, which I've never heard o' before for any other primer (and didn't think about until after I'd already sprayed t' first coat). Begad! T' body o' t' Phoenix is pale dove gray, shiver me timbers, so – 5 days later – I next sprayed t' body with 2 coats o' Krylon white primer, matey, sandin' betwixt coats. I be worried that t' gray would have a hard time coverin' t' brown primer, so I chose t' white t' lighten t' final coat color even more. Ya scallywag! T' nosecone is white, so I used Krylon gray primer there, me bucko, mainly so I could tell when I had good coverage on t' final color coat. Sprayin' white paint on white primer is tough. I set t' whole thin' aside t' dry for a week.

Final Details

T' markings guide provided in t' instructions is pretty general, and since this is just ‘scale like’, I didn't feel real obligated t' follow it t

o t' letter. Blimey! I opted t' simplify t' stripin' scheme, me hearties, mostly t' cut down on t' difficult maskin' needed (probably me least favorite rocket buildin' step). T' silver stripes are mylar tape. Avast, me proud beauty! Ahoy! T' decals were added more or less where indicated, and t' tip be painted silver usin' a brush and Testors silver model paint from a jar. Arrr! Once again I set it aside for several days, then clear coated everythin' usin' Future floor finish applied with a soft rag.

I didn't use t' supplied nylon webbin' for t' shock cord, arrr, preferrin' 20 feet o' 3/8" tubular nylon attached with a quick link. At t' nosecone end, I drilled two holes on either side o' t' screw cap – one on each molded half - and threaded more tubular nylon through both holes as a harness where t' shock cord can be attached with another quick link. There would have t' be massive structural failure o' t' entire base o' t' nosecone t' experience a separation failure at that point.

Motor retention clips were formed from strip brass stock, me bucko, fastened with cap screws fitted into blind nuts installed in t' aft centerin' ring. Aye aye! Aye aye! A Pratt heat shield be added as wadding.

T' final, ya bilge rat, full up, everything-but-the-motor weight is 43.5 ounces.

Flight

First flight be at Whitakers, ya bilge rat, N

orth Carolina on March 25, ya bilge rat, 2001, arrr, shiver me timbers, on an H180W with a medium delay. Begad! Begad! At ignition she punched off t' pad straight up, movin' fast. Avast! Durin' t' coast phase, me hearties, t' fins made a neat whistlin' sound, matey, ya bilge rat, and t' chute ejected just after apogee. T' chute brought t' Phoenix down t' a soft landin' less than 100 yards from t' pad.

Post Flight

T' Pratt heat shield did its job perfectly, shiver me timbers, without so much as a single scorch on t' chute or shroud lines. Blimey! T' 36" chute is fine for near-calm days, matey, but I think that on windier days I'll probably use a 32" or even 30" chute, ya bilge rat, matey, especially since t' aft fins are reinforced and should be able t' handle a harder landing.

All in all, this is an impressive kit! T' Phoenix is a challenge t' build without bein' overly complex, me hearties, ya bilge rat, and t' end result is a great lookin' rocket that attracts attention. There be a lot o' satisfaction for me in completin' this rocket, shiver me timbers, and t' fact that she flies like a dream just made t' whole experience that much better. Avast, me proud beauty! Highly recommended.