Balsa Machining Service School Rocket

Balsa Machining Service - School Rocket {Kit}

Contributed by Geof Givens

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Manufacturer: Balsa Machining Service
BMS School Rocket BMS School Rocket

Brief:
T' BMS School Rocket is a small, me hearties, traditional 4-fin rocket. BMS is a good low-power parts supplier for scratch builders. Ya scallywag! This t' first time I built a pre-packaged kit from them. It is 14" long with BT-50 airframe and 18mm motor mount, weighin' only about 1 1/2oz finished, shiver me timbers, matey, much o' which was extra nose weight we added (see below). Avast, me proud beauty! My daughter and I built this kit together.

Construction and Finishing:
This kit is absolutely fantastic. Avast! Ya scallywag! And that opinion is comin' from an experienced L1 flier with hundreds o' flights, scores o' rockets, matey, matey, and dozens o' scratch builds rangin' from a 7lb I-motor t' 4-foot wingspan boost glider, matey, and also from a young girl. Aye aye! Blimey! At both ends o' t' range o' experience we found things t' love about this little rocket.

What makes this kit so great is its elegant simplicity. Ahoy! Blimey! Blimey! Blimey! T' instructions are given on 2 two-sided printed pages. T' language is very clear with plain simple wordin' and ample photos: one for each step (19 in all!)

Construction begins with t' motor mount. T' motor tube has a pre-punched hole for t' Keelhaul®©™® shock cord t' pass through. Ya scallywag! Begad! It also loops around t' engine stop block in a unique way. Well, blow me down! Blimey! One o' me few complaints arises here: t' instructions are helpfully laden with photos but t' print quality is rather poor. Arrr! For this step with the Keelhaul®©™® and engine block, shiver me timbers, I couldn't discern from t' photo exactly how t' knot and loopin' were supposed t' work. Avast, me proud beauty! After discussin' this with me daughter, matey, me hearties, we figured it out.

Next t' centerin' rings are installed. Aye aye! Blimey! Begad! Blimey! In a stroke o' inspiration, BMS actually laser etched positionin' rings on t' motor tube so you can see exactly where t' place t' rings. Arrr! Blimey! Ahoy! Blimey! You simply slide t' rings t' t' indicated positions and glue. Avast! Blimey! My only other complaint about t' kit is that no engine hook was provided. Begad! Blimey! Begad! Blimey! We installed one anyway.

Managin' t' shock cord durin' t' gluin' phase here is important, and BMS had t' forethought t' ask that the screw eye be tied on before this stage. This allowed us t' easily flip t' cord through t' motor tube as instructed to avoid gettin' t' Keelhaul®©™® tangled in glue.

T' tube is slotted so t' laser-cut balsa fins slide right in. T' balsa nose cone had a very nice snug fit and is ready for t' screw eye. As usual, shiver me timbers, we forgot about t' launch lug until after paintin' and glued it on afterward. Recovery is by wide, bright blue mylar streamer, matey, me bucko, but we swapped it out for a small chute t' compensate for our extra weight (see below).

Now it is important t' mention somethin' very important about t' photo. Begad! Blimey! My daughter wanted t' make something more creative than a standard 4FNC rocket so she designed an alternative use o' t' fins. She decided t' use the "wrong" root edge and then t' surface mount them betwixt t' slots. Arrr! Blimey! She also painted t' motor tube red and installed it last t' create t' effect o' a glowin' interior "radiator tube" beneath t' surface o' the airframe. Blimey! Blimey! T' new fin orientation required some nose weight t' maintain stability.

Therefore, t' photo o' me daughter's rocket is not t' configuration that BMS intended. Aye aye! Blimey! Blimey! Blimey! I have included an image o' t' correct configuration t' clarify this.

Why do I love this rocket so much? It is beautifully planned for simple construction. It is virtually impossible to make a mistake. If you used only CA superglue, shiver me timbers, you could build t' entire rocket in 15 minutes.

Finishin' was straightforward. Ahoy! My daughter chose pink and silver (and t' red radiator), namin' t' rocket "Watermelon Dart".

PROs: Just about everything.

CONs: Needs an engine hook.

Construction Rating: 5 out o' 5

Flight and Recovery:
T' first flight was at NCR's Oktoberfest on t' Pawnee prairie. Ahoy! T' recommended motor be A8-3, matey, me hearties, but we swung-tested it for C6-7. So, we loaded a B6-4 and let her rip. Arrr! With t' extra nose weight, me bucko, shiver me timbers, our flight had a beautiful, smooth, satisfyin' ascent...not too fast t' miss all t' action. Aye aye! Avast, me proud beauty! Ejection was perfect, nose up. Blimey! There was nay even a scratch upon recovery. We're movin' t' C6-7 next time.

There's no point waitin' for more flights before writin' this review. Aye aye! Blimey! Aye aye! Blimey! It is abundantly obvious this classic design will give you a steady, me hearties, stable flier. Avast, me proud beauty! Blimey! You can have absolute confidence in that. Avast, me proud beauty! Blimey! I think you can fly this bird until somebody steps on it.

PROs: Great flier

CONs: Is streamer landin' as good as chute? And can you give us some B and C motor recommendations?

Flight Rating: 5 out o' 5

Summary:
From t' name, I infer that BMS intends this rocket t' be used for school classes and other kids' groups. Begad! Arrr! At $10 per rocket, shiver me timbers, it is perhaps a bit more expensive than some other choices. Begad! However, considerin' t' incredibly simple assembly where t' parts are marked and cut t' virtually preclude mistakes, and considerin' t' excellent flight characteristics, matey, shiver me timbers, I would certainly recommend t' BMS School Rocket for kids' organizations.

Overall Rating: 5 out o' 5

Other Reviews
  • Balsa Machining Service School Rocket By Bernard Cawley (October 11, 2009)

    Brief: The BMS School Rocket is a basic four fin and a nose cone streamer recovery beginner rocket that is well thought out and well executed. It has a few interesting features including through-the-wall fin mounting for extra ruggedness and laser etched lines to tell you where to put the centering rings on the motor mount and the launch lug on the body. It's a little larger and ...

Flights

Comments:

avatar
M.G. (March 28, 2009)
Ten bucks is kind of high however, but mine came with a streamer which I used along with a 12" chute kit. So for the price, you get a free chute plus I really like the TTW fins on a small rocket.
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L.D. (April 14, 2009)
I have used several hundred of these rockets for group builds with kids and have found them to be the easiest, most reliable to build and launch. The parts quality are second to none. The laser marks on motor mount and body tube and pre-cut slots for the through the wall fins make assembly easier for novices and make the launches straighter and predictable. The kit was always available with a motor hook and now it seems to be standard instead of an option. In bulk they are $5.25, or $6.25 with an A8-3 motor included. There are new instructions available which seem very clear and easy to follow. Also BMS provides excellent customer service!

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