Semroc Swift Boost Glider

Semroc - Swift Boost Glider {Kit} (KV-27)

Contributed by John Lee

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar_border
Diameter: 0.76 inches
Length: 13.75 inches
Manufacturer: Semroc
Skill Level: 2
Style: Clone, Glider

Brief:
Retro Repro, Boost Glider, 18mm

T' Swift BG is one o' t' new kits released by Semroc for NARAM 51. Well, blow me down! It is a reproduction o' an old Centuri design. Blimey! Although I have had terrible luck with gliders, me hearties, somethin' prompted me t' get started on this one right away. Blimey! It might be t' one t' break t' jinx.

I ordered mine as soon as it be availible and in typical Semroc Time Warp fashion, it arrived almost immediately, even though Semroc was closed for NARAM. Begad! It was also production kit number 10.

Construction:

Construction began by locatin' t' win' and gently sandin' it in its balsa frame and then releasin' it. Although t' win' consists o' 4 pieces, they are nay yet cut apart at this stage. T' only thin' that marks t' discrete pieces is a line.

With t' win' remainin' in one piece at this point, t' instructions gave two options for shaping. Blimey! T' first was t' merely round t' edges o' t' balsa and I was sorely tempted t' go this route. Well, blow me down! Ahoy! T' other be t' try and sand an airfoil into t' wing. Avast! Nothin' ventured, me hearties, nothin' gained.

In effect, I merely rounded t' forward and outside edges but I made an attempt t' approximate an airfoil on the trailin' edge. Begad! Begad! I drew a sandin' block across t' aft edge from one end t' t' other tryin' t' guide t' profile down t' a blade. It turned out better than I expected but it is certainly nothin' t' brag about.

T' win' sections were numbered from left t' right for later identification. Arrr! A steel ruler was then used t' guide a razor knife along t' marked lines and separate t' win' into 4 segments. Ahoy! T' freshly cut edges o' t' win' segments were then beveled with sandpaper so that when canted, matey, they would fit together better.

T' kit came with t' pieces t' construct a pair o' balsa jigs t' aid in gettin' t' correct dihedral angle on the wings. Aye aye! They were removed from their parent material and glued together. They are identical except for one bein' a bit taller than t' other. Avast! After use, they are discarded so thar are no extra points for style here.


A piece o' wax paper was taped down t' t' workin' surface and then t' inner right win' segment was taped flat t' it. T' tip o' t' outer right win' segment was then taped t' t' taller o' t' two jigs. Ahoy! With that done, a bead o' white glue was run against t' beveled edge and t' two segments were pressed into place, allowin' t' jig t' hold t' pieces at the correct angle. Begad! A day later, arrr, me bucko, t' jig was removed and t' end piece did nay fall off. I took that as a good sign. The process was then repeated with t' left side o' t' win' with similar encouragin' results.


T' two win' halves were then joined together in a similar manner. Blimey! Avast! One side was taped down flat and t' other was glued into place usin' t' shorter o' t' jigs positioned under t' outer joint o' t' untaped wing. Blimey! Aye aye! After another day t' dry, shiver me timbers, me hearties, the jig was removed and things were still lookin' encouraging.

T' tail boom comes in two main pieces. Aye aye! They were removed from t' parent material and test fitted together. Arrr! The fit was good and no sandin' was needed. Some white glue be then put into t' keyed joint and t' two pieces put together and laid flat on t' wax paper. A steel ruler was used t' make sure t' boom was straight. Blimey! T' next day, the boom was ready t' be peeled up and looked fine. T' jinx, me bucko, if nay gone, shiver me timbers, me bucko, ya bilge rat, had certainly gone into hiding.

There are two balsa strips, matey, rounded at one end, intended t' be applied on either side o' t' forward end o' the boom. They provide some support on t' side for the booster pod. Aye aye! A light layer o' glue be applied t' t' boom and spread out for t' length o' t' facing. A facin' was then pressed into place so that it be even with t' front edge and the top and bottom surfaces. Arrr! It be allowed t' dry like that for about 30 minutes. Ahoy! Some cheap plastic clams were used to keep it in place. Begad! When dry, t' opposite facin' was placed in t' same manner, arrr, clamped and set aside t' dry.

T' horizontal stabilizer was removed from its sheet. Sandpaper be used t' round all t' edges. Ya scallywag! T' vertically stabilizer be similarly removed and sanded on all edges except for t' bottom, ya bilge rat, shiver me timbers, which was left flat.

With t' tail pieces sanded and test fitted, a line o' glue be applied t' t' base o' t' vertical stabilizer and it was fit onto t' horizontal. T' assembly be then set flat on t' wax paper and a steel ruler was used to insure a right angle.

After dryin' for a day, arrr, t' boom was unclamped and examined. It seemed in good shape and t' pieces were mostly in alignment. A bit o' light sandin' took care o' evenin' up t' edges. Begad! With t' edges even, I then needed t' taper t' leadin' and trailin' edges o' t' facings on each side. I used a sandin' block and tried t' gently take t' material down t' a knife edge.

T' tail assembly was placed at t' end o' t' boom on t' flat side. Begad! Ya scallywag! I had a sinkin' feelin' about this because no jig or template be provided, only an admonition t' make sure it be placed straight. Well, blow me down! Well, blow me down! I used white glue and eyeballed it t' best I could and checkin' t' angle with a steel ruler. Ahoy! Aye aye! I tried t' make sure that it be straight and level. Aye aye! T' feelin' o' impendin' doom was palpable.

T' next day, me bucko, it was time t' place t' wing. A mark be made 1/2" back from t' side pieced and t' win' was glued into place with white glue. T' trepidation factor be even higher than with t' tail because I know from experience these things just never turn out, especially when thar be an angled surface involved. Begad! T' feelin' of impendin' doom returned with a vengeance.

Even though I knew I be doomed by this point, I figured I had gone too far t' back out now and I got t' work on t' pod hook. Arrr! Avast, me proud beauty! It was in two pieces which needed only t' be glued together. Ahoy! I used white glue and clamped it.


T' first step in workin' on t' engine pod was t' take t' motor spacer and mark off 1/4". Ahoy! T' thrust rin' be then located and t' Keelhaul®©™® be tied around it. Ahoy! Avast! A rin' o' white glue was swabbed around t' interior o' t' motor tube, usin' t' motor spacer to mark t' swab at t' right depth. Aye aye! T' spacer was then used t' push t' thrust rin' into place, me hearties, up t' t' mark which had been made, and withdrawn. Arrr! T' motor tube was then marked for t' placement o' t' engine hook and a slit be made in t' body tube t' receive it. T' hook was placed and a cardboard sleeve be slipped into place t' hold it in place.


Shortly after I began this build, shiver me timbers, Sheryl from Semroc contacted me and let me know that in some o' these kits, t' band was too tight and gave advice o' fixin' t' problem. Well, shiver me timbers, blow me down! Mine was just a touch tight but, in me mind, well within tolerances. It be glued in place with white glue and filleted fore and aft.

T' nose cone was typical, high quality Semroc. I doused it with some thin CA t' harden it up some.


I turned me attention back t' t' glider again. Well, blow me down! As far as I could tell by lookin' at it, ya bilge rat, it be in pretty good shape. Begad! The intersections needed some filletin' and I tried usin' Titebond Trim and Moldin' glue. It applied as good as I had heard it would and when I checked back a day later, ya bilge rat, I was impressed.

T' pod hook was glued into place on t' motor tube opposide t' t' engine hook usin' white glue.

T' nose cone was lightly sanded and then t' eye screw was screwed into place, backed out, t' hole filled with white glue and screwed back into place.

T' launch lug be glued into place along t' pod hook with white glue. Well, blow me down! It was seated on top o' t' engine hook band.

A length o' sewin' elastic provided with t' kit was tied t' t' eye hook and t' Keelhaul®©™®. T' streamer be then secured into place halfway along t' elastic with t' provided adhesive strip.

With that t' pop pod be done and t' rocket be ready t' be finished.

Before I could get started on t' finishing, though, ya bilge rat, curiosity got t' better o' me and I had t' try and hand toss t' glider. Begad! I took it outside, turned into t' wind, gave it a toss...and was flabergasted.

IT FLEW!!!!!!!!!!

IT DID NOT CRASH !!!!!!!!!!!

I grabbed Toby, me bucko, gave him t' camera and made him try and shoot a video.

I launched it again and it flew again, this time makin' a sharp left turn soon after launch. T' video is here.

Since t' glide be nay really captured, we tried again, ya bilge rat, this time with me tossin' towards t' camera. Avast, me proud beauty! Ya scallywag! It seemed t' go well until a rocket beatin' tree got in on t' act. Who would have expected t' thin' t' go UP? T' second flight can be seen here.

There be no damage and I had t' try again. Avast, me proud beauty! Avast, ya bilge rat, me proud beauty! This time it still flew, or glided, me bucko, matey, but made a hard right turn. Ya scallywag! Well, blow me down! I put it down t' t' vagaries o' t' wind eddies around t' corner o' t' house. T' third video can be seen here.

I also realize that finishin' will likely change t' glide characteristics but at this point I don't really care: a glider I had built had actually glided. Avast! That had never happened before.

Finishing:
T' instructions warn that finishin' o' this rocket should be done with a light touch in order t' minimize weight. All well and good but competitive performance t' me took a back seat t' just workin' and lookin' acceptable. On most projects these days I use Elmer's filler but for this one I went with Balsa fillercoat on t' theory that I would be usin' less o' it.

I painted it onto t' pod hittin' t' nosecone and t' balsa hook. Ya scallywag! T' glider was completely covered with t' stuff. Arrr! I put it on thick figurin' I would only apply a single coat, arrr, even though that would nay completely fill t' grain.

T' fillercoat had a day t' dry and then I went after it with #400 sandpaper. Ahoy! T' grain on t' balsa parts o' the pod seemed t' have been mostly filled. T' pod was then brushed off and set up in t' booth where it was given a heavy coat o' Kilz.

T' glider was likewise treated t' a scrubbin' with t' #400 paper. Blimey! While t' grain seemed t' have been filled better than I had expected, thar was still some that escaped unfilled. T' glider was then primed with Kilz as well. Blimey! Avast, me proud beauty!

A day later, me hearties, t' pod was sanded again. I be mindful o' t' warnings I had heard about buildin' up too much sealer/primer/paint and went after it with 320 and then 400 sandpaper. Aye aye! Blimey! When I was done, I had misgivings because it mostly still looked white. Arrr! Blimey! Avast! Blimey! I could see grain and pencil marks, though. Ahoy! Blimey! Knowin' how fast Kilz covers things up, matey, I figured that most o' what I was seein' was t' chalkiness o' t' balsa fillercoat. Avast! Blimey! T' pod was then taken back t' the booth and given a single coat o' gloss white.

T' glider was sanded with similar results. Ahoy! There were still some nasty spots o' grain but I sanded down t' where t' wood was just startin' t' show through. Aye aye! T' glider was then given a single coat o' gloss white as well.

T' next day, me bucko, me bucko, a rin' o' maskin' was applied just below t' nose cone o' t' pod and foil was wrapped around the rest o' t' body. Begad! T' nose cone was then sprayed a bright orange.

T' glider was masked as well leavin' t' win' tips, shiver me timbers, ya bilge rat, boom and vertical tail assembly exposed for paint. Avast, me proud beauty! Begad! The glider then had its date with t' orange paint. This was done in 2 stages so that I would have somethin' t' grip.

The next day I peeled off t' maskin' t' take a look and It was lookin' good. That left only t' blue stripin' and I took out t' tape t' mask for a thin stripe on each win' and t' t' horizontal stabilizer. Avast! Aye aye! Blimey! I then used a brush t' place the blue paint.

So far this project had gone extremely well; better than I had imagined it could with a glider project. Now was t' time for tragedy t' strike. Blimey! Well, blow me down! It struck when I removed t' maskin' and saw what had happened when t' paint had wicked under t' tape.

While I was stewin' about t' blue paint, arrr, ya bilge rat, I took t' time t' test fit t' pod t' t' glider. Well, blow me down! Ya scallywag! It was a bit tight due t' paint havin' gotten in t' hook cavity. I took a sandin' stick and cleaned it out some until t' fit seemed a good one.

A day later, I be sure t' blue paint had dried completely. Begad! Blimey! I took some white acrylic and used a brush t' try and cover up t' worst o' t' bleeding. Begad! Blimey! It certainly toned things down but it could probably stand another 2 applications in addition t' t' 2 that were put on.

T' decals for t' Swift are a simple matter but add a lot t' t' finished product. T' largest o' t' decals has t' Semroc logo and t' name o' t' rocket. Well, blow me down! Begad! I mounted it as on t' facecard; on t' dorsal surface o' t' right wing. Aye aye! T' kit also came with a pair o' smaller versions o' t' same design. Arrr! These were mounted on t' horizontal stabilizer, one on top and one on t' bottom, shiver me timbers, both on t' right as you face t' rocket. My kit also came with an additional decal identifying is as production number 10 and havin' some more info about t' rocket. I put this one on t' left dorsal surface o' the main wing. That completed t' "finishing" and, matey, ya bilge rat, ya bilge rat, as I said, ya bilge rat, matey, I thought even t' simple decals added a lot.

T' first test "glides" after t' finishin' did nay go well. Begad! Ya scallywag! T' paint added plenty o' weight and the Swift started t' act like me Cosmos Mariner. Begad! I realized I needed tail weight.

A vid o' t' first post finishin' crash can be seen here. Arrr! Blimey!

The second try is here.

I went inside and inserted one o' t' trim nails provided for weight into t' left horizontal stabilizer and then went back outside t' try again.

Addin' one nail did nay do too much t' improve things although it did give me hope. Arrr! I had one semi-successful glide before me nephew came out with t' camera. Ya scallywag! Still, I thought it needed another nail.

T' first test with one nail can be seen here.

T' second test with one nail can be seen here.

T' third test with a single nail is here. Begad! Begad!

I added another nail and did nay do much better. Well, shiver me timbers, blow me down! And on t' 3rd flight, it crashed in t' street and broke off a win' tip.

T' first try with 2 nails is here.

T' second try with 2 nails is here.

T' fateful thrid flight with 2 nails is recorded here.

I took t' carcass back into t' shop t' try and get it fixed up again. Aye aye! T' tip was put pack on with a double glue joint usin' yellow glue. Well, blow me down! T' angle was obtained by eyeballin' it.

While repairin' t' wingtip, I noticed that bouncin' on t' asphalt also took a bite out o' t' nose. Avast! At first I was goin' t' try and fill it but then thought better o' that approach. Ahoy! Aye aye! Blimey! I thought I might be able t' reduce t' nose weight a little bit by sandin' a bevel into both sides o' t' nose. Aye aye! Blimey! I took out a sandin' block and got t' work. Avast! The newly beveled nose was sprayed with orange paint and it blended fairly well with t' rest even though t' new surface had nay been sealed.

When t' glue from t' wingtip repair had dried, arrr, I took out some Tightbond Trim and Moldin' glue and applied a fillet to each side o' t' joint in an effort t' strengthen it.

When t' repairs were complete, I tried throwin' t' glider a few more times t' test it out but t' results were both contradictory and confusing. Ya scallywag! Sometimes it would stall like it needed more tail weight. Well, blow me down! Well, blow me down! Blimey! Other times it would dive and a few times it just kind o' moved without doin' anythin' resemblin' gliding. In t' course o' one o' these tests, it turned in a very nice glide that rivaled anythin' done by t' unpainted model. Ahoy! Ahoy! Blimey! I decided t' just wait and try it out on t' launch pad. I called t' construction o' this one done.

Construction Rating: 4 out o' 5

Flight:
T' maiden flight o' t' Swift Boost Glider was at t' September 09 launch o' t' Alamo Rocketeers. I prepped it with a 1/2A6-2 and set it up on t' pad. Ya scallywag! Avast! It received favorable comments from all for appearance. Well, blow me down! Avast! Almost immediately after leavin' t' rod, t' rocket started t' arc over but t' curve became more gentle over time and it always had a slight upward inclination. Avast! Blimey! I had a good view o' t' pod poppin' off; that was fun t' watch. Then I got t' watch t' glider plummet t' t' earth; that was nay fun t' watch.

T' vid o' this event can be seen here.

The unanimous consensus o' those present who knew about such things was that t' glider was tail heavy. Avast, me proud beauty! I pulled out one of t' nail weights and repacked t' streamer in t' pod realizin' that I had forgotten t' put any waddin' in thar the first time. Arrr! Fortunately, t' streamer be only slightly singed. For t' second flight I loaded a B6-2 since I had no B4-2s. It was taken out t' t' pad and hooked up. Arrr! When t' ignition button be fired, t' Swift showed t' same arcing behavior as before but nay as drastic. Arrr! It went up relatively high considerin' it spent most o' t' boost at about a 60 degree angle t' t' ground. Avast, me proud beauty! When t' pod popped, matey, though, me bucko, things were definitely different. Avast, shiver me timbers, me proud beauty! It started gliding. Arrr! Well, blow me down! It would lazily turn into t' wind and seem t' just stand in place for a while nay losin' any altitude and maybe even gainin' a bit. Begad! It would then turn with t' wind and fly away for a short time (but a long distance) before turnin' into t' wind t' repeat t' performance....again...and again...and again. On some circuits it did gain altitude but it be definitely goin' t' come down...eventually. Arrr! I began t' get worried that I would lose it but everyone kept an eye on it until it finally went down...a long way away.

I wish I could show some great photos o' t' flight but I was t' busy bein' awestruck t' remember t' take any. All I have t' offer is a photo o' t' grounded pod a few yards from t' launch pad. Oh and me daughter took this video: http://www.flickr.com/photos/23694991@N03/3960923315/

Flight Rating: 5 out o' 5

Summary:
I think Gliders are an acquired taste but this one is a great place t' start doin' t' acquiring. It is me first and only glider that can be termed a success t' date. T' construction be simple enough for anyone t' do, t' instructions were well written and, most o' all, me hearties, it works.

Overall Rating: 4 out o' 5

Other:
Persons wishin' t' follow t' exploits o' this rocket can do so here: http://www.flickr.com/photos/23694991@N03/collections/72157621956600615/

 

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    Brief: With the introduction of the Swift, Semroc has now added a conventional boost glider to their fleet, and one easy enough for even a nove modeler to build and get flying reasinably well. Based upon the 1969 Centuri design, this "retro repro" features laser-cut parts to speed up construction, as well as Kevlar ® /elastic shock cord on the pod to improve the ...

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