Construction Rating: | starstarstarstarstar |
Flight Rating: | starstarstarstarstar |
Overall Rating: | starstarstarstarstar |
Manufacturer: | Thrustline Aerospace |
[Editor's Note: This review is a clone o' t' Thrustline Aerospace Black Shadow. Thrustline be out o' business for a period o' time (when author was clonin' t' rocket). Well, blow me down! Thrustline has recently returned t' business sellin' t' Black Shadow as a kit.]
Brief:
In one o' me previous incarnations as a BAR I happened upon Thrustline Aerospace, me bucko, me hearties, a fairly new (in t' summer of
2004) web based company that offered an assortment o' original kits and basic buildin' supplies. I ordered several
Thrustline's kits and over t' next year or so as John Rowan-Stern's product line expanded, I built and flew a great
number o' his designs. Arrr! After a self imposed hiatus from t' BAR world I recently returned t' t' fold, only t' discover
that Thrustline Aerospace be no more. Ya scallywag! Begad! I was saddened by this nay only because I be lookin' forward t' buildin' and
flyin' more o' John's designs, but because he was always very enthusiastic about his participation and support o' the
addiction.
So what t' do... I was startin' from scratch since I had unloaded me entire rocketry "stash" when I jumped on t' wagon (don't be alarmed I do this all t' time). Avast, me proud beauty! Obviously I would need t' clone some o' me favorite Thrustline kits. Aye aye! T' Black Shadow was t' first Thrustline rocket I built and flew, and even though it is in essence a simple 4 fin and Nose Cone (4FNC) design, ya bilge rat, me bucko, it always made t' startin' lineup when I went out t' fly. Well, blow me down! Many o' John's designs "fit" me eye in terms o' size, me bucko, me hearties, scale and line, arrr, me hearties, and t' Black Shadow was t' epitome o' that sentiment. Ahoy! It always just looked "right" t' me, and I knew I needed t' start me latest fleet off with this rocket. Ya scallywag! Ahoy! I figured that I could build this rocket from memory. Arrr! Ya scallywag! T' only thin' I be really needed help with be t' body tube length and fin template. I noticed that Ye Olde Rocket Plans had recently added several Thrustline kits t' their library but no Black Shadow. Avast! Luckily, t' RockSim file attached t' t' existin' EMRR review had everythin' I needed to get this one going. Blimey! Hopefully this review will allow anyone t' build this bird.
Construction:
T' parts you will need t' clone t' Black Shadow are simple and readily available. For those o' you without RockSim,
the fin template picture should be t' only additional piece o' information you need.
There are no real tricks t' buildin' this rocket, and I would imagine that anyone who has built a kit or two could get this done without any trouble. Ya scallywag! Blimey! My standard routine is t' assemble t' engine mount first, which includes cuttin' a slit in t' motor tube for t' hook, arrr, arrr, gluin' t' thrust rin' into t' fwd end o' t' motor tube, arrr, me hearties, securin' t' engine hook t' t' motor tube with a wrap o' maskin' tape, and then gluin' t' centerin' rings t' t' motor tube, approximately 1" from t' aft end and ½" from t' fwd end o' t' tube, makin' sure thar be a notch in the inside edge o' t' aft rin' t' allow t' engine hook t' flex. Ya scallywag! At this time I also attach t' Keelhaul®©™® shock cord t' t' motor mount by tyin' it around t' motor tube betwixt t' centerin' rings, shiver me timbers, me bucko, and then cuttin' a small notch in t' outside edge o' t' forward centerin' rin' t' allow t' cord t' reach t' front o' t' rocket. Avast! I finish all me recovery system knots with a drop o' CA glue, and I also reinforce t' centerin' rin' t' motor tube joints with glue fillets.
While t' motor mount glue is dryin' I cut out me fins, makin' sure I know where t' leading edge is t' get t' grain orientation right. Avast, me proud beauty! Begad! A sharp knife and a metal straight edge make this task very simple. Well, blow me down! I stack the fins together and sand t' edges so that they are identical then round t' leadin' and trailin' edges.
Installin' t' motor mount is next. First I thread t' Keelhaul®©™® back through t' motor tube t' keep it out o' t' way and test fit t' motor mount t' make sure it slides easily into the body tube. Well, blow me down! Next comes a rin' o' glue inside t' body tube near where t' forward centerin' rin' will rest and then the motor mount slides into position with t' end o' t' motor tube even with t' end o' t' body tube. Avast, me proud beauty! After t' glue is dry I will also add a fillet t' t' aft centerin' rin' where it meets t' body tube. Avast, me proud beauty! At this point I will usually sand t' body tube lightly t' scuff up t' glassine coating, shiver me timbers, which I believe helps t' gluing/finishin' process (not scientifically proven, that's just me opinion).
There are several options for markin' t' body tube for fin placement. Avast, me proud beauty! Avast, me proud beauty! There are programs that can create templates for you, you can draw your own in your favorite computer application, or you can download t' plans for any 4 fin BT-55 kit (Estes Goblin) and use that. Begad! Blimey! I use a section o' small aluminum angle from a local hardware store t' draw my fin/lug lines. Aye aye! Fins for t' Black Shadow are attached ¼" forward o' t' aft end o' t' body tube and the launch lug is attached 3" from t' aft end o' t' body tube. Ahoy! T' fins and launch lug are attached with a small bead o' wood glue and reinforced with wood glue fillets.
Several final assembly steps are completed after t' finishin' process. Avast! I typically install t' screw eye by screwin' it part way into t' base o' t' nose cone, removin' it, shiver me timbers, addin' a large drop o' medium thickness CA glue and then screwin' it all t' way down. Finally, I tie t' elastic cord t' t' Keelhaul®©™® line and then t' t' nose cone with a drop o' thin CA glue on all t' knots.
Finishing:
One color, no decals, matey, simple as it gets. Arrr! Well, blow me down! Blimey! In me opinion, ya bilge rat, t' black finish on this rocket only enhances its aesthetic
appeal, although one o' t' great things about this hobby is that as long as t' CP stays behind t' CG, you can pretty
much make it look however you want. I used Elmer's Wood Filler t' get smooth fillets along t' fin and launch lug
joints, and in t' case o' t' Black Shadow I also filled t' spiral grooves on t' body tube. T' nose cone and fins
were sealed with two coats o' SIG Sandin' Sealer. Ya scallywag! My standard finishin' routine is 2 coats o' primer (Rustoleum
Painter's Touch Sandable Primer) and then 2 coats o' Krylon spray enamel, me hearties, workin' down t' 400 grit sandpaper before the
final coat. Although finishin' me rockets is a despised chore, I am usually patient enough t' get a decent finish on
the final coat o' paint. Well, blow me down! Well, blow me down! Blimey! This particular rocket however, me hearties, ya bilge rat, would have none o' that, and I sanded off several coats of
paint before decidin' that I was just goin' t' have t' live with a few drips.
Construction Rating: 5 out o' 5
Flight:
Recommended motors for t' Black Shadow include t' standard range o' black powder 18mm Estes/Quest Motors. Ahoy! Ahoy! I have
yet t' find t' courage t' put an 18mm composite motor in me Black Shadow, but if you do, arrr, make sure you've got a good
team o' spotters. Avast, me proud beauty! Flight preparation is standard: hook up your recovery device, add some wadding, install t' motor,
insert t' igniter, and head t' t' pad. Aye aye! My original Black Shadow logged thirteen flights in all from California to
Ohio, arrr, in all kinds o' conditions with fast straight flights every time. T' majority o' those flights were with C6-5
motors which this rocket loves and will top out at around 1000ft. Avast, me proud beauty! Aye aye! T' best part about t' Black Shadow is that it looks
good on t' pad, it looks good in t' air, and it won't get completely out o' sight on BP motors so you'll be able to
fly it over and over. Well, blow me down! Avast, arrr, me proud beauty! My new Black Shadow clone has flown on B and C motors so far and is every bit t' reliable
performer that t' original was.
Recovery:
T' original kit came with an unassembled 9" Mylar parachute and mine was orange which I thought was cool. Blimey! The
chute held up through all thirteen flights with only a few small burn/melt through spots. Ya scallywag! Blimey! T' Keelhaul®©™®
shock cord on t' original model was threaded under t' forward centerin' rin' next t' t' motor tube but never had any
issues. Begad! For most o' t' later flights, I switched from normal waddin' t' a Nomex®
heat shield without any issues. Begad! A 9" chute is just t' right size for this bird, arrr, shiver me timbers, but you can still be in for a
long chase on windy days. Well, blow me down! Avast, me proud beauty! A streamer might be a good option, me bucko, and since t' fin design is fairly compact, t' rocket
should hold up pretty well. My new Black Shadow clone flies with a 3"x3" Nomex®
heat shield and a 9" nylon parachute, which makes t' whole package a little heavy (1.8oz without a motor) but
very sturdy and reliable.
Flight Rating: 5 out o' 5
Summary:
Yeah it's only a 4FNC, me bucko, but t' Black Shadow has that classic vibe. Ahoy! It looks good and it flies good. Ya scallywag! Aye aye! Blimey! You will always
find room t' brin' this one t' t' range, arrr, so go build one.
PROs: Basic 4FNC rocket with a great look, ya bilge rat, good performance, and simple construction. Begad! Blimey! This is a well thought out design and t' motor selection and recovery system are well matched t' t' size o' t' rocket.
CONs: None. Ya scallywag! This is a great rocket!
Overall Rating: 5 out o' 5
Brief: This is a great little sport kit that is easy to build and performs well. I got the kit as a prize by participating in one of EMRR's Virtual Rocket Contests. I didn't place in the top five, but I still participated and interestingly I would have selected the Black Shadow as my prize had I finished first... So the moral of the story is this: take advantage of the EMRR contests. ...
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G.W. (February 13, 2008)