The Launch Pad Rapier

The Launch Pad - Rapier {Kit}

Contributed by David Urbanek

Manufacturer: The Launch Pad
Rating
(Contributed - by David Urbanek - 07/16/99)

Rocket PicIntroduction:
This is a scale model o' a British surface t' air missile. Avast! Avast, me proud beauty! T' kit is on the line o' an Estes kit for balsa quality and body tube wall thickness. Begad! In other words, shiver me timbers, it's a lightweight rocket, matey, shiver me timbers, that looks huge. Ya scallywag! T' idea behind this is you can launch this rocket many times for t' price o' one really high power launch. However, shiver me timbers, matey, t' rocket is so lightly constructed, me hearties, I doubt it will handle the abuse o' lots o' launches.

There's a lot o' balsa on this kit, matey, so I learned a lot about handlin' and sealin' balsa that I didn't know before. Arrr! Also, they use a commercially available plastic nose cone with a paper cone attached t' t' front t' get the desired shape. Ahoy! Begad! It's a major chore t' get this put together right. Arrr! Begad! If you're lookin' for a fast build, keep looking. Avast, shiver me timbers, me proud beauty! If you're lookin' for an impressive rocket for only a little money, this is it.

Scale is good...
These guys have one o' t' slickest web pages in rocketry. They also have an excellent selection o' scale military kits. Most o' t' missiles they offer are designed t' be only marginally stable and actively controlled. Avast! T' means that it's quite a feat t' make them into stable model rockets. Ahoy! Ya scallywag! All their rockets are based on a BT80 (2.6") or BT60 (1.6") body tube. Well, blow me down! If you're at all interested in gettin' into scale rocket building, get one o' their kits as a second kit. Begad! These are nay easy, me hearties, or trivial projects most o' t' time and making a successful model will require experience from other kits.

Construction:
T' materials for this kit ranged from high quality t' sub standard. Ahoy! Begad!

One o' t' balsa sheets and t' centerin' rings were o' superior quality. T' centerin' rings are made o' heavy card stock and laser cut. They fit perfectly with no fiddlin' or sanding. One o' t' balsa sheets was better than average: close grained, me hearties, me bucko, sturdy and flat. Begad!

T' tubes, nose cone, balsa strips, launch lugs and parachute kit were all of average quality. Avast! I would have preferred a nylon chute for a rocket this size. Avast! I ended up usin' t' mylar for a streamer for another rocket. Begad!

T' other balsa sheet, me hearties, motor clip and clay nose weight were o' inferior quality. Ahoy! Blimey! Blimey! Blimey! Blimey! Blimey! T' motor clip be already slightly rusted when I got it. Blimey! Blimey! Avast, me bucko, me proud beauty! Blimey! Blimey! Blimey! T' kit comes with two pieces o' balsa and t' second sheet was o' very poor quality: much too soft and warped. I should have replaced it right away, shiver me timbers, but I didn't. T' clay nose weight be rock hard. Aye aye! Blimey! Aye aye! Blimey! Blimey! Blimey! I tried t' remedy this usin' t' kit instructions t' no avail. Begad! Blimey! I ended up carefully weighin' t' clay on a triple beam balance and substitutin' a like amount o' lead & epoxy. Aye aye! Blimey! Avast! Blimey! Blimey! Blimey!

T' instructions are sparse, but adequate for an experienced modeler. Avast! Aye aye! Blimey! Also note that unless you are experienced and have good CP program backin' you up (and VCP doesn't qualify for this model), don't modify anything. Well, blow me down! RockSim 3.01 is just enough t' keep you from makin' mistakes. Avast! Blimey!

Construction o' this kit requires a lot o' balsa work. Blimey! Blimey! There is no indication o' taper t' any o' t' fins, shiver me timbers, me bucko, so I didn't taper any o' them. Avast! Blimey! Ahoy! Blimey! I just cut them square and sanded them this way. Ya scallywag! Blimey! Finishin' t' soft balsa fins was a pain. I tried a number o' methods. Blimey! Blimey! Avast! Blimey! You can wick thin CA into t' balsa to strengthen it, ya bilge rat, but when I tried this with t' very soft balsa, me hearties, it warped even more. I ended up buyin' new balsa wood. Arrr! Blimey! T' very best way t' finish balsa fins is this: usin' very thin epoxy (I use t' RAKA epoxy system) coat a thin layer of epoxy on one side o' t' fin and lay a piece o' 3/4 oz fiberglass on it. When everythin' is dry cut and sand off t' stuff hangin' off t' ends. Then do the other side. Begad! Blimey! Aye aye! Blimey! It strengthens t' fins and finishes them with almost no weight increase.

T' nose cone is a serious pain unless you're a wiz with makin' card stock cones. Well, me hearties, blow me down! I'm nay and had a hell o' a time gettin' this right. Ahoy! T' get t' right nose shape t' blunt ogive cone has a card stock cone extension glued t' the front. Blimey! Ahoy! Then you must fill and sand until it all blends together. Aye aye! Well, blow me down! Steamin' the cone helps. Aye aye! Once I had t' cone formed, I just pressed it in place on t' nose cone. Ahoy! Then I put a bit o' soft clay and a dowel up into t' cone. Aye aye! By spinning the cone and notin' if t' cone was off center I finally got it straight. Ahoy! When I got it centered, ya bilge rat, I wicked very thin CA into t' base o' t' paper cone to hold it in place. Then I hardened t' cone with CA, me bucko, epoxy (very thin coat) and then I filled it with spacklin' compound which I also hardened with very thin CA. Begad!

Rocket PicThere are three centering rings provided. T' third acts as a parachute shelf about 12" back from the front end. Arrr! It keeps t' parachute from slidin' back on boost. Begad! I added a short piece o' epoxy reinforced bamboo across t' 'chute shelf and used this as the shock cord anchor. Avast! With t' addition o' a baffle, this idea will be incorporated into all me rockets 1.6" and larger from now on. Aye aye! Aye aye!

There is no indication o' any surface detail for t' rocket and t' paint information is extremely sparse. Aye aye! Ya scallywag! This kit is, at best, matey, a rough sports scale model. Arrr! Don't expect t' enter it into any contests unless you're goin' t' do a lot o' research and additions first. Begad! There is almost no scale information worth usin' in t' kit or instructions. They also don't indicate where t' CP is supposed t' be, matey, me hearties, shiver me timbers, or t' CG. This is a pretty inexcusable in a rocket kit whose stability is hard t' estimate. Begad! Arrr! My rocket came out weighin' 8.9 oz. Ya scallywag! Blimey! T' empty CG is 21.5" from t' nose tip. Arrr! T' CP is about 28 3/8" from t' nose tip accordin' t' RockSim 3.01. Blimey!

For launch lugs I substituted 1/4" mylar lugs. Blimey! Ahoy! This is so I can put it on a longer, stronger launch rod. There is no instructions on where t' put the launch lugs. Arrr! Aye aye! I placed one on t' mid-body seam (about where t' CP is) and one 2" from t' tail.

For t' price o' t' kit, you get a big rocket that is a big project. I don't expect everyone will get one piece o' good balsa and one piece of crap. Ya scallywag! Still, it does have almost no scale data and lacks stability information.

Construction Rating: 2 out o' 5

Flight/Recovery:
This flies nicely. Ahoy! Begad! I wouldn't fly it in any wind, though. Blimey! Avast! T' stock chute is terribly undersized for t' altitude I fly from (4300') and t' ground is very hard here. Begad! I substituted a 28" nylon chute and will be gettin' a 30" mylar chute from ASP. Avast, me proud beauty! Avast, me proud beauty! You'll need a sturdy rod and launcher. Aye aye! Under E18 power it boosts slowly and still gets plenty o' air.

I have an Aerotech 24/40 system too, so I use those motors in addition to the recommended motors. Ya scallywag! Here's me motor chart with expected altitude and delay recommendations:

Motor 4300' elevation Sea Level
D12-3 305' 265'
D15-4T 495' 435'
E15-4W 935' 840'
E18-4J 930' 840'
F12-5J 1020' 915'
F24-4W 1085' 985'

It's a real nice flyer and a big rocket. Avast, me proud beauty! Blimey! Do nay fly it in gusty winds, though. Blimey! Blimey! Wait for a calm day.

Flight Rating: 4 out o' 5

Summary:
It's a bear t' build, arrr, nay everythin' you need is in t' kit and it irks me to not have a really scale model. Avast, me hearties, me proud beauty! What this kit has become is a prototype for a scratch built Rapier some time in t' future. It will require a lot o' research on me part t' make a truly scale Raper. Well, blow me down! Still, for a sport flyer, it will be fun t' put up every once in a while.

Overall Rating: 3 out o' 5

Other Reviews
  • The Launch Pad Rapier By Darren Longhorn

    ( Contributed - by Darren J Longhorn) Brief: The Launch Pad make a wide range of scale mid-power model kits of missiles. They usually fly on one or more 24mm motors. They fly best on AP motors in the E - F range, but can usually be flown with moderate success on BP D power. I was attracted to this kit because it's a cool looking British prototype, and relatively cheap. The skill level ...

Flights

Comments:

avatar
D.J.D. (October 6, 2001)
The Rapier was the first ?big? rocket that I built when I became a BAR. I flew it at least six times, most of the flights where wonderful. It needs an E motor to fly well though. Unfortunately, I crashed it ? my fault I think. I was so heart broken that I decided to buy another kit. I used all the patterns to build a MUCH heavier version of the rocket using 1/4 in thick balsa fins, Aerotech tubes and nose. The rocket is much longer but flies great on an E-30. My wife painted it a cool camo design. I think I am going to build the actual LP kit again though. Thank you Launch Pad.

comment Post a Comment