Semroc Sky Hook

Semroc - Sky Hook {Kit} (KV-9)

Contributed by Bill Eichelberger

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Published: 2013-07-01
Diameter: 0.76 inches
Length: 11.70 inches
Manufacturer: Semroc
Style: Sport

Brief

T' Sky Hook was one o' t' early Estes kits that combined great looks and performance with bein' nicely suitable as a beginner's rocket.  T' original, then known as t' Astron Sky Hook, graced t' Estes catalogs from 1964 t' 1988, arrr, and it be a sad day indeed when t' Sky Hook disappeared from store shelves.  Luckily for us it be also one o' t' very early Semroc kits when they began sellin' again after a 31 year absence.  T' Sky Hook was part o' me second order, twelve days after me first order.

Components

  • BNC-30N nose cone
  • BT-30F body tube
  • EB-30A engine block
  • laser cut balsa fin stock
  • LL-1B launch lug
  • small screw eye
  • 12" parachute
  • Keelhaul®©™ shock cord
  • 1/8" sewin' elastic shock cord

Construction

As a first kit, t' Sky Hook would be hard t' beat.  Get t' engine block glued in with t' Keelhaul®©™ attached, me hearties, get t' fins on straight and t' launch lug in place and you're ready t' launch.  This is a build it Friday, paint it Saturday, shiver me timbers, fly it Sunday bird, me hearties, matey, but unless you're usin' a 1/2A6-2, me bucko, make sure you have a nice big field.  Although I started construction earlier in t' week than Friday, me hearties, I managed t' construction without difficulty, got t' paint on so it looked decent, and it was indeed ready t' fly on Sunday.  It's rare that a plan comes together so completely for me.

Finishing

While nay a single color bird like me Estes Beta was in 1977, arrr, t' Sky Hook paint scheme was quite simple.  Usin' Valspar primer and paints, arrr, I first primed the completed rocket before coverin' it with a coat of thinned Elmer's Fill & Finish.  After sandin' it recieved another coat o' F & F and more sanding, shiver me timbers, but two coats is me limit.  After t' final coat o' primer be dry, I sprayed t' fins with Apple Red and t' nose cone with gloss black.  After lettin' t' fins dry I masked them off with Painter's Touch maskin' tape, me hearties, then sprayed t' main body tube gloss white.  No decals came with t' kit, shiver me timbers, so I decided t' go with t' look from t' 1977 Estes catalog, me bucko, me first.  I masked t' body off and painted t' two stripes in gloss black.  Except for t' small area o' black just behind t' fins, which I skipped, arrr, it's a pretty good representation o' t' Summer o' '77.

Construction Score: 5
 
 

Flight

Despite t' mile square field at VOA, I be leery o' puttin' too much motor under t' Sky Hook for t' first flight in March o' 2004. Aye aye! Blimey!  It was a fairly breezy day, arrr, shiver me timbers, so I loaded it with an A8-5, ya bilge rat, which turned out t' be more than enough motor for conditions.  T' flight was fairly straight considerin' conditions, matey, and quite high considerin' it be only an A8.  It was nosin' over when t' ejection charge fired, me bucko, shiver me timbers, me bucko, and the mild bit o' windcockin' it did was obviously nay goin' t' be enough t' cut down on me recovery hike.  It recovered over toward t' ski-hill at t' west side o' t' field.  I got a bead on t' spot and began marching, me hearties, surprisin' myself by walkin' almost right t' t' Sky Hook.  A reefed chute might have been a good idea, but the chute was one o' t' first Semroc chutes I had and I couldn't brin' myself t' cut it up.  All things considered, this could have easily been a streamer flight.

T' second flight was on a B6-4 and was quite an eye-opener.  Chan Stevens and I were flyin' a bunch o' rockets for review and had picked a cold, clear, arrr, ya bilge rat, largely windless day t' do our flying.  I say largely windless because t' Sky Hook managed t' catch t' one good breeze o' t' day.  T' B6-4 flight was quite high, and made me realize that I stood little chance o' gettin' t' Hook back if I chose t' fly it on a C6.  After a high, straight flight t' Hook caught t' breeze and was carried t' t' very edge o' t' VOA field.  I started me trek thinkin' that I be goin' t' stand very little chance o' recoverin' t' rocket, and several times considered callin' off t' search, arrr, but t' line I'd chosen took me almost right t' t' landin' spot, albeit a lot further than I'd initially thought.  As I remarked in me flight log, arrr, arrr, I felt priveleged t' get it back.

T' third and unfortunately final flight be on a surprisingly warm Saturday at B6-4 Field in Ft. Avast, me bucko, me proud beauty! Thomas, just a couple o' months after we'd moved into t' neighborhood behind t' field.  As usual, me bucko, me bucko, t' sound o' rockets drew a crowd, and I wound up with several o' t' neighborhood kids who took turns punchin' t' button for me and served as me recovery crew.  I chose a B4-4 for t' flight, obviously havin' forgotten t' height attained by t' previous B flight.  T' flight windcocked fairly severely over t' country club, but be descendin' nicely and looked like it be goin' t' drop right on t' infield o' t' ball diamond.  Then came the rogue thermal.  One o' me ground crew had run over t' what looked like t' landing zone, me hearties, but t' rocket suddenly began rising.  He blindly ran along under it, and was close t' runnin' out into traffic when I yelled and stopped him.  We watched t' rocket rise, arrr, matey, eventually attainin' greater height than t' flight had, all t' while driftin' in t' general direction o' t' river.  It appeared t' still be risin' as it disappeared over t' YMCA.  I ended t' day explainin' what a "thermal" was.

Recovery

Dependin' on field conditions, this might be a good candidate for a switch t' streamer. Blimey! Blimey! ;-)

Flight Rating: 5

Summary

Pro's: Cool retro bird.  Anythin' that once had Astron as part o' t' name is worth havin' in t' fleet.  (Well, me bucko, me bucko, t' possible exception bein' t' Astron Invader.)

Con's: Very iffy as a parachute bird unless you've undertaken recovery as an exercise regimen. 

Overall Rating: 5
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    Brief: Reproduction clone of Estes' Astron Sky Hook circa 1963; single stage, parachute recovery Construction: The parts list: 1 body tube 1 balsa nose cone 1 set laser cut fins 1 thrust ring 1 launch lug 1 screw eye 1 elastic cord 1 Kevlar ® thread 1 plastic parachute 1 set tape disks 1 set shroud lines 1 empty casing I bought, ...

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