Sunward Aerospace Liberator

Sunward Aerospace - Liberator {Kit} (SNW00005)

Contributed by Lance Alligood

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Length: 24.00 inches
Manufacturer: Sunward Aerospace
Style: Jet

Brief:
KitT' Liberator is a complex jet fighter-like design single-stage low power rocket that's built (and weighs) like a tank. Avast, me proud beauty! Begad! T' manufacturer rates it as skill level 3.

Construction:
T' kit contains:

  • 18in BT-56 body tube (slightly larger than BT-55)
  • Plastic nose cone with canopy bubble
  • Laser cut balsa wood fins
  • "Jet engine intake" wrap-around and fin reinforcement sheet
  • Decal sheet
  • Parachute plastic sheet (for 18" chute)
  • Self-closin' plastic bag with launch lugs, motor tube, ya bilge rat, thrust ring, centerin' rings, ya bilge rat, shroud line, me bucko, parachute reinforcement rings, ya bilge rat, and elastic shock cord.
  • Instruction manual

T' good news: My first impression when openin' t' bag was that t' parts appeared t' be o' great quality. I'd never built an LPR kit with laser cut fins and it's clear t' see why they're all t' rage. Well, blow me down! Blimey! (In fact, this was me first non-Estes LPR.) T' high quality o' t' balsa is worth notin' as well. T' nose cone be made (and had t' weight o' a scaled down version) from t' same plastic used on mid and high power rockets. T' canopy for t' cockpit was part of t' nose cone. Begad! Blimey! Blimey! When dry fittin' t' parts, arrr, t' nose cone also fit snuggly--I can see why tubin' slight larger than BT-55 is used. Begad! It simply would nay fit in anythin' smaller. Blimey! Well, blow me down! Blimey! T' instruction manual appeared t' be very thorough. Avast, me proud beauty! Avast! Blimey! 7 pages (on 8.5"x11" paper) front and back showin' 26 steps (not including givin' t' rocket a swin' test, me bucko, ya bilge rat, preparation, warrantee, me hearties, and Canada's model rocket safety code). Avast! Blimey! T' be Canadian friendly, matey, all steps were in English and French. This also was t' first rocket I'd ever built where I had t' assemble the parachute. T' plastic for t' chute is considerably thicker than any Estes chute I've ever seen.

T' bad news: Dry fittin' t' motor mount found all parts t' be rather loose fitting. Blimey! Blimey! Arrr! Blimey! Slidin' t' beefy (for an LPR) centerin' rings into t' BT-56 was loose as well. All o' this is noted in t' instructions too. Well, arrr, blow me down! Blimey! I didn't care for t' way outer edges were defined on t' cardstock template. Well, blow me down! Blimey! Instead of thin, sharply defined lines t' cut out, thar are areas o' gray shaded areas that define t' parts nay t' be used. As carefully as I cut t' pieces out, there was a slight inconsistency in part sizes (like for t' "top" fin). Ahoy! Blimey! Ahoy! Blimey! Perhaps t' most disappointin' item be t' shock cord. Avast, me proud beauty! Blimey! It was merely a piece o' elastic. Begad! Blimey! 30 inches o' quarter-inch 100% stretchy rubber. Avast, me proud beauty! Blimey! No polyester. As determined as I was t' build this kit entirely stock, t' image o' t' nose cone and chute driftin' off as t' rest o' t' sustainer tube plummets t' the earth when t' shock cord burns through was somethin' I just couldn't get out of me head. Begad! Blimey! I chose t' use 3ft o' 1/4" elastic from me supply box.

Construction be guided well by t' manual. Begad! First was t' motor mount. Another item o' note is that t' MMT uses a small threaded L-shaped piece of metal in place o' t' bent metal clip for motor retention. Begad! Once assembled, you twist t' end over or away from t' MMT tube t' hold or remove t' motor, respectively. Aye aye! A different mousetrap, ya bilge rat, if you will.

Next be t' body wrap. Avast, me proud beauty! Cut from t' cardstock, matey, arrr, folded along marked lines, and initially tacked on t' t' body tube lengthwise. T' instructions do a good job t' recommend that enough time be given t' let t' glue dry after each step here. Begad! T' wrap eventually goes around t' entire tube with parts flared out to create t' air intakes. Aye aye! Despite me careful markin' o' t' tubes I managed to get t' cardstock attached slightly crooked...but again, that be completely my own fault and wouldn't be enough t' detract from t' overall design and flight of T' Liberator. Also I found that usin' a paperback book helped hold the cardstock in place while dryin' so that I could briefly attend t' other matters. Well, ya bilge rat, blow me down! And I was hopin' that t' cardstock would "heal" somewhat when t' glue dried. Avast, me proud beauty! T' paper used is a little sensitive t' t' moisture in white glue t' t' point o' bein' visible and slightly raised t' t' touch. Hopefully primer and sandin' will reduce or eliminate t' glue lines.

T' cardstock already has t' markings on it as t' where all t' fins should be placed. Avast! There are 6 pieces o' balsa that cover t' bottom o' the rocket and one fin on t' top. Avast, me proud beauty! T' top fin has 2 other pieces o' cardstock glued onto each side t' aid in adhesion t' t' body tube. Ya scallywag! These extra flaps do add weight and in me opinion detract from t' overall sleekness o' t' design but definitely gives extra rigidity t' t' fin and should prevent it from ever poppin' off on a hard impact. Also, me hearties, runnin' a bead o' glue along where t' fins come in contact with one another greatly increases rigidity and should eliminate any potential fin flutter.

T' rest o' t' construction is routine...glue on t' decorative pieces and launch lugs, glue in MMT, me hearties, 3-fold shock cord mount, assemble parachute. Somethin' that will surprise those concerned with t' win' aerodynamics is that it's nay till step 24 that you are recommended t' round t' win' edges. Well, blow me down! I didn't bother with doin' that and left t' wings as is but I can see where you might accidentally round an edge (or part o' one) that shouldn't be... Aye aye! Still, matey, I would think it much easier t' sand t' wings before they are glued onto the body tube.

Once assembled, me bucko, I liked t' plane-like look t' it. Begad! T' wings provide enough sustainable lift I, arrr, in fact, was able t' get it t' glide quite a ways when throwin' it horizontally (across t' room onto a nearby bed or sofa). Begad! Begad! This bird is heavy though. Even with t' thick paint job on me stock Big Bertha, me hearties, the naked Liberator feels noticeably heavier.

On construction alone, arrr, arrr, I think skill level 3 is pretty accurate considering the complexity o' t' cardstock body wrap. Begad! Blimey! It's definitely a technique that you won't see in many kits.

On the padFinishing:
I didn't break out t' Elmer's Fill 'n' Finish because I wanted t' see how this high quality/density balsa directly reacted t' Krylon primer. T' body tube spirals are so light (especially when compared t' t' edge o' t' cardstock wrapped around t' body tube), I didn't bother fillin' them in either. Once primed, thar's a lot o' area t' sand for an LPR but it didn't take very long due t' t' quality materials. Begad! Well, blow me down! Care needs t' be taken on t' body wrap so as to not cause any unwanted dents or creases. Begad! Also, me bucko, shiver me timbers, t' nose cone is made of high-density polyethylene, me hearties, matey, which is an unusual material for an LPR. Blimey! Take it from someone who has built MPRs & LPRs: rinse t' nose cone and then sand it with 250 or 320 grit sandpaper before you even think about puttin' on any paint. Ahoy! Otherwise t' paint will peel right off t' waxy surface. Well, blow me down! A couple of coats o' primer and she was ready for final gloss coats.

I liked t' paint scheme on t' packagin' insert over t' camouflage scheme shown on t' website, but used gloss black instead o' red t' accent against the silver underside. Well, me hearties, blow me down! I'm pretty pleased with t' results. There are self-adhesive decals--lots o' them--and t' kind that you also have t' cut out individually too. Avast! Sunward Aerospace is a Canadian company but they're nice enough to recognize t' customer base in t' US and UK. Aye aye! Included is a nice choice of flags, matey, logos, ya bilge rat, and symbols t' represent all 3 countries equally. Avast! T' decals provide an excellent finishin' touch t' t' rocket. Begad! Lastly, I put an accent stripe around t' canopy bubble (since t' canopy and nosecone had both been painted black) with a new Sharpie metallic silver marker. Arrr! Aye aye! I hope these pens become available in more colors...they offer a paint-like quality but with the fine detail and application o' a marker. Blimey! Excellent for detail work.

And like I mentioned above, T' Liberator is HEAVY. Finished weight (sans motor) is 4.5oz! Blimey! I knew early on that this rocket was goin' t' be underpowered--even on a C6--based on weight alone. I don't have access t' one but me gut tells me that t' only way this bird is goin' t' achieve decent altitudes is for those brave souls with an AT D21. Well, blow me down! Blimey! Let see how she flies...

Construction Rating: 4 out o' 5

Flight:
First flight recommendation is a B6-2. Ahoy! Uh, matey, I don't think so. Seein' how me Big Bertha flies best on a C6-3 and weighs a full ounce LESS, me hearties, I'm nay puttin' The Liberator up on anythin' else t' first time out. Avast, me proud beauty! I felt t' shorter delay would be a good idea, again, due t' t' weight.

I prepped it with a few pieces o' wadding, matey, readied t' motor and put it up on t' pad. It was breezy day but I still aimed t' rod straight up. Aye aye! The Liberator had a slow but straight liftoff t' maybe 300ft before t' wind pushed it over into an upside down position (the belly o' t' plane facin' t' sun) where it ejected at apogee. Aye aye! I apparently didn't put in enough waddin' as all but 2 o' t' shroud lines burned through. Avast! T' body tube stayed horizontal the whole way down so t' broad wings and t' little drag provided by t' chute allowed it t' still land safely without damage.

Taking to the skyT' wind had calmed slightly right before t' second flight (on t' same day). Avast! Arrr! I borrowed an 18in Estes chute (with a 2in spill hole) from me Fat Boy and put in a couple more pieces o' wadding--I think I used 5 squares--than last time. Aye aye! I also tried t' put T' Liberator on t' pad so that any wind would blow across the fins instead o' pushin' t' bottom o' t' rocket like a sail, arrr, ya bilge rat, as was the case on its maiden voyage. This proved t' work quite well as I'd say t' second flight peaked closer t' 450ft (but still well short o' t' manufacturer's claimed 600ft). Arrr! Begad! Ejection be right at apogee, arrr, only t' chute came out but didn't open. Avast! T' body tube again remained parallel t' t' ground durin' the entire descent until it landed on t' soft, grassy field. Avast! Blimey! Post-flight analysis revealed a couple o' scratches, a slightly dented decorative fin tube, matey, an Estes-style dent in t' body tube from t' nose cone, arrr, and a poorly packed chute. Avast! User error be t' cause o' poor recovery this time.

I waited t' have t' third flight on a calmer day. Ya scallywag! Well, blow me down! Well, at least on the ground anyway. I discovered thar were some gentle high winds that The Liberator got caught up in but nay till it boosted nicely t' ~400ft. T' nose just started t' rotate downward as t' chute deployed perfectly this time. I was usin' an Estes 18in chute with a 2in spill hole cut in it so it descended quickly, touchin' down 200ft from t' pad. Finally a completely successful flight! My advice: only fly this rocket on calm days.

I didn't try T' Liberator with a longer delay than t' C6-3. I bet with the couple extra seconds in a C6-5, ya bilge rat, you might be able t' get a brief glide (as my pre-finishin' tests showed) before ejection. Well, blow me down! (I even wonder if it's possible to get this design t' have a complete glide recovery...?)

Recovery:
I obviously had a couple o' serious recovery problems with T' Liberator, ya bilge rat, both of which can be traced back t' operator error. However, given a calm day and when nothin' goes wrong, arrr, it recovers reasonably well if nay a little fast. Avast! For an LPR it does descend quickly, even on an 18in chute, so it shouldn't drift much for those folks flyin' this rocket on a small field.

I plan t' repair t' kit chute with Keelhaul®©™® shroud lines as t' plastic is a significantly higher grade than what comes with an Estes kit. Begad!

Flight Rating: 4 out o' 5

Summary:
This is a very attractive and durable kit but I'd have t' say that I'm nay sure if I'd fly it as regularly as other kits in me fleet, shiver me timbers, mostly because o' the risky recovery. Avast! Anyone who is big into military/scale kits and/or someone lookin' for a new challenge in LPR buildin' might find T' Liberator a welcome addition t' their fleet. It's a real shame that this kit is limited t' only 18mm motors. Begad! Avast! With t' rugged construction and high quality parts, me hearties, this rocket should be able t' handle t' motor mount and thrust o' at least a 24mm Estes D12... I mean it looks like a jet, so why nay have it take t' t' skies like a jet!

Overall Rating: 4 out o' 5

Flights

Comments:

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K.G. (September 18, 2003)
I'm getting ready to start a Liberator kit, and appreciated the review. Since it is a heavy kit with a quick descent rate, what about using a smaller chute (e.g. 12" wspill hole?) for the nose cone and the 18" kit chute for the body? There's plenty of room in the large BT, and it should also eliminate the "Estes Dent" the reviewer noted on one of the flights. No pun intended, but is there any down side . . . ?
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C.A.M. (August 20, 2004)
Nice review. I plan to buy a couple of these. I loved the Centuri jet-like rockets from years ago, and now SUnward has two that I want, the Liberator being one. In looking at it I think it looks just like the Northrop F-20 Tigershark which is how I hope to decorate mine. It also looks like the earlier F-5 Freedom Fighter except for the single engine outlet. I have the same flying issue with my Centuri F-4 Phantom jet rocket. It always pulls itself over on its back and flies horizontally for the last third of the flight (if not more). In doing some research I believe it need more weight in the nose. Like the Liberator, it is a heavy rocket for its size.

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