Brief:
Sport-scale version o' t' Thunderbird Anti-aircraft missile with a single 18mm motor mount

Construction:
T' parts list:

• 1 BT-60 body tube
• 4 BT-20 booster tubes
• 1 BT-60 balsa nosecone
• 1 18mm motor mount tube
• 2 sheets o' 1/8" balsa fin stock
• 1 small sheet o' 1/16" balsa fin stock
• 16" chute and ample elastic shock cord
• Keelhaul®©™leader
• 1/8" launch lug
• rings and engine block for 18mm
• screw eye for nose cone
• fin pattern sheet and cardstock for t' tail cone, booster nose cones, and booster motor cones
• templates includes spare parts

T' instructions are very well done. I found no problems at all with them. I jumped around, as I always do but followin' them in order would work just fine.

I deviated a bit from t' instructions because I assembled and painted t' boosters separately from t' sustainer. T' build be very challenging, yet t' instructions take you through each step and even offer alternative steps t' take your build up a notch or two.

This is one o' those rockets I couldn't stop workin' on till t' end. Aye aye! Blimey! I like t' complex lookin' rockets that come with detailed, me bucko, matey, easy t' follow instructions.

T' inverted cone inside t' tail cone makes t' rocket that much more interesting!

Sandin' t' fins took a while. Aye aye! I used maskin' tape t' demarcate t' bevels while shaping. This is essential, ya bilge rat, you can't do it by eye... Arrr! Ya scallywag! I used Elmer's Fill 'n' Finish t' fill t' grain. Avast, me proud beauty! One trick I tried be t' tape off all t' bevels, matey, applied t' filler and sanded with a sandin' stick, then I removed t' tape from t' beveled surfaces and taped off t' flat surface o' t' fin, more filler and sanded those areas. Aye aye! This left a nice sharp faceted and filled balsa fin.

I found t' cones were nay hard t' construct. Blimey! Blimey! Begad! Blimey! I pre-curled them then removed t' overlap joint and glued it inside t' joint. Well, blow me down! Blimey! Blimey! Blimey! I drizzled thin CA t' harden them and used wood glue t' attach them with t' integral couplers. Ahoy! Blimey! Ya scallywag! Blimey! Once dry, me bucko, ya bilge rat, I dabbed wood filler around them and sanded flat with a sandin' stick by keepin' t' stick flat with t' OD o' t' booster tube.

T' booster straps are optional and I decided t' use them. Arrr! I used wood glue so they make a solid attachment with t' sustainer straps. Well, blow me down! Blimey! I taped off t' booster/sustainer attachment points before painting. Begad! I used medium CA t' tack t' boosters on then applied wood glue fillets with a bamboo skewer. Avast! Aye aye! I think t' straps add a lot t' t' overall look o' t' model.

T' aft shrouds coupled together perfectly, me bucko, I was surprised at how well they fit together. Ya scallywag! I had a little issue with t' outside tail-shroud bein' a little loose where it met t' body tube so I reduced t' wide end by cuttin' a angled sliver from t' wrap. Blimey! Begad! This kept t' smaller end t' size. I only changed t' size by maybe 2-3%, me hearties, very little.

One reason I built t' boosters separate was I thought t' fins may be hard t' fillet with t' tubes in t' way but after buildin' t' model, I see enough room t' do this after t' boosters are installed.

All things considered, shiver me timbers, t' most time consumin' part be t' fin beveling. It was nay really hard t' do, me hearties, just took some patience. Begad! Well, blow me down! Blimey! I did a lot o' markin' and checkin' as I filled and sanded them. They don't need t' be perfect t' look good on t' launch pad so they should only be as much work as t' builder wants t' invest in that aspect. I'm just a little more detail obsessive than I should be in some cases

I would liked t' have had a little harder balsa for t' fin stock. Well, blow me down! Ahoy! It be easy t' splinter when tryin' t' sand t' bevels so I left t' edges a little fat so they might hold up better. T' soft balsa is easy t' sand so it's nay a big problem. Avast, me proud beauty! Begad! Also, I started out with 120 grit so in defense o' t' balsa, 220 grit or higher might have been a better choice t' rough shape t' bevels.

I made one mod. Arrr! On t' inside small end o' t' booster motor shrouds, shiver me timbers, I installed a round balsa block (1/8" thick) so I had a balsa t' balsa joint when gluin' them on. Avast! Aye aye! I used thin CA t' harden t' paper as well. Avast! Avast! This is purely me own idea as t' stock method should work fine. Ya scallywag! That's t' obsessive me comin' out again

the best advice for buildin' t' model is t' check measurements, ya bilge rat, alignment, me bucko, and part fit before committin' t' glue. Well, blow me down! O' course, arrr, this is good advice for any model.

Finishing:
If a person prefers t' fill t' spirals, matey, do it beforehand on this one. It will be much harder t' do later.

T' model was painted a fictional scheme with Createx airbrush colors shot through a Paasche H airbrush. Begad! I mixed up some military lookin' colors from what I had on hand.

T' metallic copper is Anita's brand craft paint from one o' t' major craft stores. Begad! Ahoy! Blimey! I just brushed it on.

T' model is nay that hard t' build or paint if it's broken down into sections. Arrr! Blimey! I put tape over t' glue joints betwixt t' boosters and sustainer than glued them together after painting.

T' model does nay include decals as t' real missile is usually found in an overall green color. Aye aye! I added a few small pieces o' black vinyl just t' jazz it up a bit. I docked 1/2 construction point because I feel t' model is deservin' o' a higher skill level ratin' than t' stated 2.5 for t' model. Begad! Avast, arrr, me proud beauty! Blimey! However, I also believe that a very nice and easier model can still be made without bevelin' t' fins and addin' t' optional details.

Construction Rating: 4 out o' 5

Flight:
T' recommended motors are B6-4 and C6-5. Ya scallywag! Avast, me hearties, me proud beauty! I prepped t' model with 4 wads o' Estes wadding. Ahoy! I flew t' model from a 1/8" rod Estes pad on t' recommended C6-5. Aye aye! T' model put in a very nice flight. Avast! There was some wind yet t' rocket stayed on a straight course.

Recovery:
t' model includes a Keelhaul®©™ leader connectin' t' an elastic line. Ahoy! Well, blow me down! T' length be enough t' prevent t' nosecone from snappin' back after deployment

Ejection was very close t' apogee. Avast, me bucko, me proud beauty! Sadly, me hearties, I could nay get a launch picture as I was launchin' t' model myself.

After landin' on its side, me bucko, shiver me timbers, t' stiff breeze on t' field caused t' model t' roll over several times. Ahoy! Avast, shiver me timbers, me proud beauty! This resulted in three o' t' boosters tearin' clean from t' optional paper bands. Ya scallywag! T' damage was actually quite minimal. As I approached t' rocket, shiver me timbers, it looked like t' model had strangely jettisoned it's boosters after landin' as they lay thar surroundin' t' rocket.

I plan t' make an easy fix by gluin' t' boosters directly t' t' sustainer, shiver me timbers, matey, which is also suggested in t' instructions, and wrappin' t' bands around t' tubes t' give t' same illusion (a great idea posted by one o' t' members o' t' Rocketry Forum).

Flight Rating: 4 out o' 5

Summary:
PROs: very cool scale-like model that is both challengin' and rewardin' t' fly.

CONs: lots fins that can be easily damaged on hard landings. Begad! Avast, shiver me timbers, me proud beauty! However, this be t' nature o' many unusual scale missiles, and this model turns out more robust that it might appear at first look.

Overall Rating: 4 out o' 5