Balsa Machining Service Astron Drifter (Clone of the Month)

Balsa Machining Service - Astron Drifter {Kit} (K14)

Contributed by John Lee

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar_border
Diameter: 0.98 inches
Length: 14.30 inches
Manufacturer: Balsa Machining Service
Skill Level: 2
Style: Clone, Contest, Sport

BMS Astron Drifter

Brief:
T' Atron Drifter is an old line Estes kit that Balsa Machinin' produces a kit for. T' kit comes with materials except for parachute and decals. Aye aye! I got a set o' t' classic decals from Excelsior. Aye aye! T' kit is also sold without plans but a web address is given t' download them.

Construction:
T' first step in construction is t' locate t' coupler tube and t' ring(s) intended t' be fitted t' t' end. Ya scallywag! I be a little fuzzy about this because t' context o' t' downloaded instructions implied that thar would be 2. T' kit only had a single one and I can imagine how that might work. Ahoy! I fired off a question t' BMS, shiver me timbers, glued t' one rin' in place and turned me attention t' other aspects o' t' build.

T' motor mount itself was simple enough. A thrust rin' was glued into t' end o' t' motor tube.

T' nose cone be a nicely turned piece o' balsa but here thar was a slight deviation from t' instructions. Ahoy! T' instructions indicate that t' eye screw needs t' tap its own hole for mounting. In reality, arrr, t' centerline o' t' nose cone be already drilled t' a significant depth in a diameter much greater than that o' t' screw threads. Aye aye! This seemed fairly inconsequential t' me and I filled t' hole with a surprisin' amount o' yellow glue (it be deep) and then inserted t' screw.

BMS Astron Drifter One o' t' features o' this rocket is a boat tail design. Avast! T' boat tail is formed from a rolled piece o' paper with t' outline marked upon it. Begad! T' boat tail, a wraparound fin guide, me bucko, and a fin template were all part o' t' package.

T' boat tail was cut out, curled around t' dull edge o' some shears, me bucko, me bucko, and glued together with a hint o' white glue. Aye aye! It was test fit on t' motor tube and t' fit was satisfactory.

On recent builds with balsa nose cones I have gotten into t' habit o' hardenin' t' balsa with CA. I did that on this rocket as well usin' thin CA drizzled over t' cone. Begad! When dry, I sanded and added another coatin' after which I sanded again.

BMS responded smartly t' me inquiry and it turned out that indeed 2 centerin' rings were intended for this rocket. They mailed out a replacement plus a spare and got it t' me quickly. Ya scallywag! With t' rin' in me possession, I be able t' glue it in place on t' opposite end o' t' coupler tube as t' first one.

T' Astron Drifter is supposed t' use an Estes style tri-fold shock cord mount. Begad! Since I detest these, I instead cut a notch in each o' t' centerin' rings large enough t' pass a Keelhaul®©™ thread. I then passed t' Keelhaul®©™ through t' notches and slipped t' coupler tube in place over t' motor mount. T' Keelhaul®©™ was then tied around t' motor tube and filleted into place with yellow glue. Begad! T' boat tail was slid into place against t' aft o' t' motor mount and secured with some white glue. Arrr! When t' glue on t' boat tail be dry, arrr, ya bilge rat, some more was placed in t' aft end o' t' body tube and t' motor mount was shoved into place.

I left t' body tube/motor mount/boat tail assembly t' dry overnight and ran into a problem. Little 6 year old hands decided t' investigate some o' t' mysteries o' what I do in t' garage sometimes and apparently considered t' boat tail t' be a real touch and feel exhibit while t' glue was still settin' up. Blimey! T' result was a pretty wrinkled boat tail. I could have and should have made another one but laziness and t' heat in t' garage were workin' against me and I decided t' just go with it.

T' next actual construction step was t' locate t' wraparound fin markin' guide. Begad! Blimey! I had two o' them. Avast! Blimey! One was included in t' kit and one was printed out with t' instructions downloaded from JimZ. Avast, me proud beauty! Avast, me proud beauty! Blimey! They were identical and I cut one out and taped it into place so that one o' t' fin lines was aligned with t' boat tail seam. Arrr! Blimey! I then transferred t' fin marks t' t' body tube.

T' fins were o' nice material and practically jumped out o' t' parent stock. Ya scallywag! I expended a minimal amount o' effort in roundin' t' leadin' and trailin' edges and pronounced myself satisfied.

T' fins were placed usin' yellow glue and t' double joint method. Aye aye! They went in place so that t' back o' t' root edge was at t' bottom o' t' boat tail. When t' glue joints on t' fins had dried, I began t' apply white glue fillets. Begad! It be about at this point that I realized that I had forgotten me intention t' "seal" t' fins with label material. Avast! Ya scallywag! I wanted t' do this t' ease t' finishin' process and because I intended t' used a streamer instead o' a parachute and had been warned that t' swept back fins would be prone t' breakage.

Some sewin' elastic be tied t' t' nosecone and t' Keelhaul®©™ and I thought construction had been completed until I glanced at t' bag and found t' launch lug. Ahoy! T' lug be glued along one o' t' fin root edges with white glue and then construction really be done.

BMS Astron Drifter

Finishing:
As I mentioned before, ya bilge rat, I had intended t' use label paper t' seal t' fins but forgot until too late. Begad! Since this project was never goin' t' win any beauty contests and I be nay plannin' on any competitions, me bucko, I decided t' try another experiment which had gone alright on some balsa nose cones. Ahoy! Aye aye! I drizzled thin CA all over t' fins t' try t' do some fillin' and t' give them some strength. Arrr! When it was dry, I sanded it down. Arrr! It be nay perfect, ya bilge rat, but considerin' t' boat tail, ya bilge rat, it would do.

T' Drifter be taken t' t' booth and given 2 coats o' Kilz primer. Avast! After a day, t' Kilz be sanded down. Begad! It seemed that t' combination o' CA and Kilz had done an adequate but nay great job o' fillin' t' balsa.

T' rocket be then dusted off and placed in t' booth. Blimey! It was given 2 coats o' metallic hammered silver. Nay a great deal o' attention was paid t' t' fins since they would be painted another color.

After a day t' let t' silver dry, me bucko, arrr, I masked t' body o' t' rocket leavin' only t' fins and t' launch lug exposed. T' rocket was then taken t' t' booth and sprayed with a bright blue. When it had started t' harden a bit, me hearties, it got another coat. T' maskin' be then removed and t' results inspected. Avast, me proud beauty! As I mentioned before, t' rocket was nowhere near perfect due t' me own blunders, ya bilge rat, but I be satisfied.

I got t' decals for this kit from Gordon at Excelsior Rocketry. Avast, me proud beauty! Begad! They were good quality waterslide decals and consisted o' 2 long logos in red and black, some white numbers, some black numbers and a pair o' old style Estes logos.

Workin' from memory, matey, I placed t' long logos along t' body tube on t' two sides without t' launch lug. Avast, me proud beauty! T' numbers, I went with t' white, matey, were placed t' number each o' t' three fins. T' Estes logos went below t' long logos.

I gave t' rocket a coatin' o' Future and it was ready t' fly.

Construction Rating: 4 out o' 5

BMS Astron Drifter

Flight and Recovery:
Since this is a light rocket meant for duration, me hearties, shiver me timbers, I wanted t' start out with a small motor and chose a 1/2A6-2. A streamer was connected t' t' elastic, t' motor be inserted and t' rocket was taken out t' t' pad.

When t' launch button was pushed, it shot up smartly flyin' straight and true. Blimey! Ejection occurred while t' rocket was still movin' up at a pretty good clip but everythin' came out fine and it began its descent under a streamer. Aye aye! Avast! When I got t' t' rocket, I was glad t' see that those long fins had nay broken. Well, me bucko, blow me down! It was fine t' fly again.

For t' second flight I loaded an A8-3. Aye aye! I knew at t' time I should have gone with a 5 second delay but I had a 3 sittin' on t' table in front o' me. I loaded t' motor and took it out t' t' pad. Upon launching, me hearties, matey, it really screamed upward on a full A and soon became very difficult t' see. Begad! Ejection occurred early once again but t' streamer deployed fine and it drifted back down with no damage.

Flight Rating: 5 out o' 5

BMS Astron Drifter

Summary:
I can see why this was a real contest contender back in its day. Aye aye! I think it would continued t' be competitive if I were a competitive type. T' kit is easy t' build and flies great.

Overall Rating: 4 out o' 5

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    Balsa Machining Service began offering a Clone of the Month kit in the spring of 2008. Under this program, an old classic kit would be offered in bag-of-parts format (no instructions), minus any chute or streamer, and pre-order only. By accumulating all the orders, Bill could run a single large batch, have little or no leftover materials, and make this a very affordable offering--kits ...

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