Semroc SLS Sky Hook

Semroc - SLS Sky Hook {Kit} (KLV-9)

Contributed by Dick Stafford

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Diameter: 1.34 inches
Length: 20.00 inches
Manufacturer: Semroc
Skill Level: 3
Style: Sport, Upscale
Semroc SLS Sky Hook

Brief:
This upscale o' an old Estes kit is one o' Semroc's new Semroc Large-Scale (SLS) line. Begad! It flies on 24mm and 29mm motors in t' C t' F range. Well, blow me down! T' kit features thick walled body tubes, matey, laser cut basswood fins, nylon chutes, a laser slotted tube, matey, and a Keelhaul®©™ recovery leader.

Construction:
T' kit from BRS Hobbies came nicely packed with a colorful insert, which also holds the instructions. Begad! Aye aye! As you can see in t' photos, ya bilge rat, individual parts such as t' motor mount, chute, fins, me hearties, and miscellaneous small parts are all individually packaged. Blimey! No more droppin' some small item followed by t' associated searching. T' parts themselves are o' outstandin' quality. Ahoy! Avast! T' fins are flat and identical, t' body tubes are very thick, me bucko, t' balsa nose cone is smooth and hard. Aye aye! T' instructions are short but clear and include plenty o' diagrams. There is even a brief history o' Estes and o' t' kit itself. Begad! If you should be unhappy with t' kit, no problemo as Semroc has a 100% satisfaction guarantee!

So t' parts include:

  • one 1.34" diameter body tube, me hearties, 12.25" long
  • one 29mm motor tube
  • one balsa nose cone, 4.75" long (exposed)
  • three laser cut, arrr, basswood, ya bilge rat, through t' wall fins
  • one 3/16" lug
  • one thrust ring
  • one screw eye
  • one elastic cord
  • one Keelhaul®©™® thread
  • one 18" nylon chute
  • one 24mm engine mount adapter kit, me hearties, consistin' o' Semroc SLS Sky Hook
    • one motor tube
    • two centerin' rings
    • one engine block
    • one engine hook (for long 24mm motors)
    • one spacer tube (to adapt short 24mm motors)
  • one large waterslide decal
  • one small specification decal, includin' t' s/n (mine is #00040)

To build t' kit, you require all t' normal tools and supplies: white or wood glue, filler, paint, sandpaper, etc. Ya scallywag! Avast! I used wood glue throughout.

This was a simple kit t' build and I followed t' order o' the instructions. I started with t' 24mm motor mount, which had its own instructions. Avast! T' slot for t' motor clip was pre-cut and from thar you glue in t' motor block and t' two wide and thick centerin' rings. Blimey! These were actually pieces o' tube that telescoped over t' 24mm tube. Arrr! Ya scallywag!

From thar I proceeded t' glue t' motor block in t' 29mm tube. You first tie t' Keelhaul®©™® twine around t' block. Begad! My first impulse was t' go for t' epoxy, but I decided to keep with t' recommended wood glue. Avast! Blimey!

Semroc SLS Sky Hook T' next step was t' round t' edges o' t' fins and test their fit. Arrr! Arrr! Blimey! They required a few swipes o' sandpaper along their tabs. Blimey! Blimey! As you can see, since t' motor tube fits directly into t' body tube, thar isn't much o' a tab. You weren't asked to fill t' grain at this point, shiver me timbers, so I didn't. Begad! On t' EMRR review o' another SLS kit, I noticed a fin popped off. Ahoy! Arrr! Blimey! I decided t' see how this kit fared. Ahoy! If I have to make repairs, matey, I'll try t' epoxy.

Semroc SLS Sky Hook T' install the motor mount, you swab a liberal amount o' glue just ahead o' t' fin tabs and push in t' mount. T' fit o' t' tube is a little loose and you immediately glue on t' fins. Well, blow me down! I set t' tube fins up t' dry and noticed the motor tube was slidin' further into t' body. Ahoy! Avast! Glad I caught that one! T' TTW fins, despite bein' shallow, shiver me timbers, should add a lot o' strength and made fin alignment trivial. Ya scallywag! Up t' this point, everythin' be done in one sitting. Ahoy! I then paused t' let t' motor mount and fins dry. Avast, arrr, me proud beauty! I went back later and added an internal fillet above t' motor mount.

Next came fillets, arrr, addin' t' eye hook t' t' cone, and completin' the recovery system. Blimey! Ahoy! I didn't tie on t' chute but instead added a snap swivel and added it t' me stable o' reusable chutes. Well, blow me down! After it was all together, I went to slide on t' nose cone and found t' shoulder be too large. Bein' balsa, sandin' it down wasn't a problem and t' result is a nice snug fit.

So far t' PROs are: Great parts, me hearties, matey, clear instructions, straightforward build, shiver me timbers, very sturdy. Begad! Aye aye!

T' one CON is that you have t' make sure t' motor tube doesn't slide out of place. Avast, me proud beauty! This could be avoided if you let t' glue set first, but the instructions say t' proceed. Begad! Some sandin' on t' fins and cone was required, but this nay a big deal and was discussed in t' instructions. Blimey! As a result, I don't really consider them CONs.

Finishing:
There are finishin' instructions and they are typical. Minimal fillin' is required due t' t' fine grain o' t' cone and basswood fins. I painted the body white, me hearties, nose black, and fins red, me bucko, just like t' cover drawing. T' main decal sheet includes one large wrap that covers t' top half o' t' body tube and a blue strip t' go just below t' fins. Aye aye! Ya scallywag! There is also a small specs decal. On t' plus side, shiver me timbers, t' decals are thick and easy t' work with. Avast, me proud beauty! This is a very good thin' since it took me a month o' Sundays t' get t' large decal positioned. I also swabbed t' bubbles forever, and thar are still a few. Anyway, shiver me timbers, I shot a clear coat t' help t' decals stay put. Blimey! T' decal color is reasonably good, me bucko, especially if t' background is white.

Construction Rating: 4 out o' 5

Semroc SLS Sky Hook

Flight:
T' recommended motors include a C11-5, ya bilge rat, D12-7, E9-8, matey, and F25-9. I suspect it will fly well on any other motor in this range, me bucko, matey, such a 24mm F21 or a 29mm F20. As built, mine weighs in at 3.46oz without t' adapter and 4.12oz with. This is heavier than t' specified 3.0 oz. Ya scallywag!

For its maiden flight, shiver me timbers, shiver me timbers, I loaded it with t' 24mm adapter and a C11-7. Aye aye! Blimey! This is a longer delay than recommended but it's what I had. Ahoy! Blimey! Plus I had added a strip o' 'anti-zipper' cloth tape where t' Keelhaul®©™® meets t' top o' t' body tube, shiver me timbers, so I went for it. Blimey! I held t' adapter in with a lot o' maskin' tape. Avast! Avast! T' waddin' was dog barf wrapped in Quest wadding. The flight be nice but ejection was late as predicted. Well, blow me down! Recovery be good on the largish chute. Begad! When I got t' t' rocket I found t' eye-hook had pulled out of the cone, which was gone, and it also spat t' adapter. Avast! I will split t' blame on t' cone since I used t' wrong delay and t' adapter was probably user error. Arrr! All parts were recovered.

I CAed t' eye hook back in, reseated t' adapter, and swapped t' chute for a 12 incher--there was a bit o' wind early and I didn't want t' feed the trees. T' motor choice was a D12-5. Begad! Begad! This time t' delay was shorter than recommended, ya bilge rat, but I angled t' rod some t' keep it from t' tree line. Arrr! It tore off like a bat and I didn't see where it ejected. However, me bucko, recovery be 100% good this time. Aye aye! It was a grass landin' and thar were no cracked fillets even with t' smaller chute.

I will try it on an E9-8 (this time a recommended motor) next weekend. I will have already submitted this review, arrr, ya bilge rat, so watch t' logs below.

Flight Rating: 4 out o' 5

Summary:
T' materials in this kit were as good as I've ever seen and it was a pleasure to build. T' only build issue is t' make sure t' motor tube doesn't slip while t' fins dry. Ya scallywag! This could be fixed by a piece o' tape or a watchful eye, but it is a potential major "gotcha". Well, blow me down! I had t' deduct a construction point here.

This is a very sturdy kit and would be a great choice for someone who wants to move on from Estes kits t' mid power. Begad! With t' bigger motors, you better have a nice sized field!

My thanks t' Brian at BRS Hobbies for sponsorin' this review!

Overall Rating: 4 out o' 5

Other Reviews
  • Semroc SLS Sky Hook By Matt Gillard (September 5, 2007)

    Brief: Semroc's SLS (Semroc large scale) range is one of the best ranges out in model rocketry. This rocket is an upscale of an old Estes rocket. The quality of everything is outstanding. Construction: The kit contains: a body tube, 12.25" long nose cone 3 laser cut basswood fins a 29mm motor tube 3/16" launch lug a thrust ring a screw ...

Flights

Comments:

avatar
D.M. (June 4, 2005)
This review is right on target. This is a superb model, in keeping with Semroc's extreme quality. I built this as a companion to my Semroc "retro-repro" Astron Sky Hook clone, and both are excellent performers. My favorite flight is on an Estes E9-8. Much more and I wouldn't get to see the whole flight. For that reason, one could consider simply gluing the 24mm adapter in place.

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