Pratt Hobbies Super Six

Pratt Hobbies - Super Six

Contributed by steve veerhoff

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Manufacturer: Pratt Hobbies

Pratt Hobbies Super SixBrief:
Single Stage sport model rocket with streamer recovery.

Construction:
T' parts list:

  • 1 white body tube, 12" by .8" OD
  • 3 laser cut 1/8" balsa fins
  • 1 plastic nose cone, approximately 1 3/4", ya bilge rat, Parabolic shape
  • 1 cardboard shoulder tube, shiver me timbers, goes into nose cone.
  • 1 cardboard "thrust ring"
  • 1 motor mount tube
  • 1 Keelhaul®©™ shock cord (not elastic, approximately 48"), matey, three ply Keelhaul®©™ cord
  • 1 launch lug
  • 1 cloth square heat shield
  • 1 plastic streamer made from "Caution" tape, shiver me timbers, 23" by 3"

PROs: Very easy kit t' build. Avast! Eight third graders (all age 9 or 10) with a parent's assistance were able t' assemble t' entire kit (minus finishing) in just over an hour. Well, arrr, blow me down! This included description o' t' kit and explainin' t' installation order o' parts. Blimey! T' "fin jig" holds body stable as fins are glued on and "Caution" tape streamer got attention o' t' kids. Begad! White paper body tubes. Ya scallywag! Well, blow me down! Can be decorated with markers and acrylic paints.

CONs: End o' Keelhaul®©™ shock cord frays. Avast! Type o' glue is important. Begad! Avast, me proud beauty! We used Weldbond and Super Tacky Glue.

Keelhaul®©™ shock cord did nay feed easily through body tube for two boys, me bucko, matey, had t' weigh end o' shock cord (with a launch lug) t' feed through smartly (and believe me, quick is important with third graders). Begad! Blimey! Passin' Keelhaul®©™ cord through holes in Engine mount tube was a little tricky. Well, blow me down! Blimey! followin' instructions t' t' letter caused a small problem.

This kit was purchased as a "bakers dozen" for a cub scout pack direct from t' manufacturer. Ya scallywag! Aye aye! All o' t' cubs were third graders, me hearties, arrr, so t' kit had t' have t' followin' characteristics:

Pratt Hobbies Super Six

  • Use 18 MM A engines.
  • No cuttin' o' fins.
  • Easy t' build.
  • Under $5.00 for t' kit (as we had an $8.00 budget per boy includin' engines.)

Supplies:

  • Maskin' tape
  • Scissors
  • Glue (Weldbond white glue, me hearties, Super Tacky Glue, both available at many craft and hobby shops.)
  • Rulers
  • Paint brushes

T' Super Six is a simple rocket t' build and has some very interestin' features nay seen in many other low cost kits. Ya scallywag! Avast! T' first innovation be a "fin jig", me bucko, me hearties, which is a small piece o' engine mount tube which is glued t' a piece o' cardstock. Lines are printed on t' cardstock t' indicate where t' fins go. Arrr! Well, blow me down! Once t' "jig" has dried, t' jig is taped down and t' body tube is slid onto t' jig. Fins are then glued t' t' body tube. I prepped all o' t' jig well in advance o' t' buildin' session so we did nay have t' wait for t' jigs t' dry.

T' second innovation was t' use o' Keelhaul®©™ for t' shock cord and a fireproof fabric (Nomex) square instead o' wadding.

Each o' t' cubs was able t' line up t' fins correctly and look down from t' top t' see if t' fins were straight.

While t' fins dry, t' instructions guide you through t' assembly o' t' nosecone, shiver me timbers, me hearties, which entails threadin' t' Keelhaul®©™ shock cord through a hole in a short cardboard tube, me hearties, tyin' with a square knot, matey, and gluin' t' short cardboard tube in t' nosecone. T' nose cones are thin styrene, arrr, and if handled too roughly, me bucko, ya bilge rat, will crease. Ya scallywag! Arrr! After assemblin' t' nose cone, t' streamer is slid over t' shock cord and then a small rectangle o' some fireproof fabric (like Nomex) is slid onto t' shock cord. Avast, me proud beauty! By this time, t' fins should be dry enough for handling. One o' our cubs did nay use enough glue and a fin came loose.

T' body tube was removed from t' jig and t' shock cord passed through t' body. Arrr! T' instructions stated that t' "thrust ring" should be glued inside t' motor mount tube, then t' shock cord passed through a small hole in t' side o' t' tube. Blimey! Doin' it this way makes it hard t' feed t' shock cord through t' hole. Avast! We found that at least one kit had t' thrust rin' blockin' this hole. We found it easier t' slide t' thrust rin' on t' shock cord, me bucko, thread t' shock cord through t' hole in t' engine mount, me bucko, then glue t' thrust rin' into t' engine mount, and tie off t' shock cord. Begad! Well, blow me down! T' engine mount is then glued into t' body tube.

We also made t' mistake o' addin' a fillet o' glue too soon. Aye aye! On two o' t' rockets, this loosened up t' fins, me bucko, requirin' them t' be glued again. This happened with kits usin' t' Super Tacky Glue, shiver me timbers, but nay t' Weldbond. Begad! With a statistical sample o' two, me bucko, ya bilge rat, thar be no way o' really knowin' if it was due t' t' glue or not.

T' other issue we ran into be t' ends o' t' shock cord unraveling. Ahoy! It is made o' three ply twisted Keelhaul®©™, and t' ends can unravel fairly easily. Blimey! We trimmed them with scissors, placed a drop o' glue on t' end, shiver me timbers, shiver me timbers, and were good t' go.

 

Finishing:
PROs: finishin' be remarkably easy. Ahoy! We did nay seal and fill t' balsa wood fins, but just let t' boys go at it and design as they wish. Aye aye! A light sandin' and sealin' o' t' fins would give a very smooth finish. Begad! Avast! T' kit shipped with three stickers, me hearties, me bucko, one o' a British flag, me bucko, one o' an American flag, shiver me timbers, ya bilge rat, arrr, and one with "Super six" printed on it. Blimey! Aye aye! These stickers appeared t' be clear label paper and ink jet printing. Avast, me proud beauty! Begad! We let t' boys paint t' bodies and fins with water based acrylics and used model paint for t' nose cones.

CONs: none that I could think of.

 

Construction Rating: 4 out o' 5

Flight:
T' manufacturer recommends stayin' with t' A or B size 18mm motors, specifically A6-4, arrr, matey, matey, A8-3, and B6-4. We used Estes A8-3 motors, as we had limited space. Avast, me proud beauty! Blimey! Motors are held in with maskin' tape, wrapped around t' motor and t' bottom o' t' body tube.

T' Super Six is equipped with a fireproof square o' fabric, and a Keelhaul®©™ shock cord, me hearties, so t' manufacturer states that waddin' is nay necessary. Loadin' t' streamer was a little difficult for some boys, although a child over 11 years o' age should have no difficulty. Aye aye! Blimey! T' fireproof fabric square is partially inserted into t' body tube, then t' folded and rolled streamer is carefully placed inside t' square and pushed down into t' body tube. Ahoy! Blimey! Ya scallywag! Blimey! It is important that t' fireproof fabric square completely cover t' end o' t' streamer, me hearties, or t' ejection charge will melt t' streamer.

T' shock cord is very long--in our kits it be around 48". Avast! It must be carefully folded into t' body tube. A parent performed this as all o' t' scouts had tanglin' issues. Again, a child o' 11 years or older should have no trouble with this, matey, but 9 year old third graders did.

We had 14 launches with 7 different rockets. All o' t' flights were remarkably straight, given t' slight imperfections in fin alignment. Ya scallywag! Ya scallywag! T' estimated height o' these launches was betwixt 45 and 50 meters, calculated usin' t' average o' two different altitude trackers 15 meters from t' launch site.

Two casualties occurred: one rocket lost t' nosecone completely with t' Keelhaul®©™ cord. Avast! We did recover t' streamer and t' rocket. Avast, me proud beauty! On another rocket, t' Keelhaul®©™ cord ripped loose from t' cardboard nose cone insert, me hearties, ya bilge rat, matey, so a new hole had t' be punched in t' nosecone insert and have t' cord reattached.

Recovery:
T' shock cord is a 48" length o' Keelhaul®©™ cord and is attached t' t' top o' t' engine mount inside t' rocket through a cardboard nose cone shoulder.

T' descent o' t' rocket be a little slower than expected, matey, but none o' t' rockets were damaged--not even t' two that bounced off o' asphalt. Blimey! Begad! One rocket experienced a little burnin' o' t' streamer on t' second flight, so this one will next fly with waddin' as well as t' fireproof fabric shield.

I would recommend a slightly narrower streamer, ya bilge rat, although t' boys loved t' "Caution" tape. Also, matey, arrr, I would recommend shorter shock cord material as 48" be difficult t' pack without tangling. Ahoy! One rocket experienced tanglin' o' t' shock cord, matey, but t' streamer still deployed and t' rocket was recovered safely.

Lastly, me bucko, me hearties, I would recommend gluin' paper inside t' nosecone shoulder t' reinforce and hold down t' shock cord t' t' nosecone.

Flight Rating: 4 out o' 5

Summary:
This was a very good buildin' experience for 9 year olds, me bucko, but they definitely need adult assistance.

PROs: Instructions were clear. Well, me hearties, blow me down! Fins were cleanly cut and minimal sanding/finishin' is needed. Avast! Value for price was excellent. Begad! Inclusion o' Fin Jig be also excellent--all kits should have this. Aye aye! Fireproof heat shield is a great idea, although they could have been just slightly larger. Begad! Flights were excellent. Aye aye! Arrr! I attribute this t' t' inclusion o' t' fin jig.

CONs: Keelhaul®©™ cord frays easily on t' ends. Attachment t' motor mount is tricky if followin' instructions as printed. Blimey! Nose cone attachment t' cardboard shoulder must be glued well.

Overall Rating: 4 out o' 5

Other Reviews
  • Pratt Hobbies Super Six By Daniel Kirk

    Brief: Beginner's streamer recovery model. Small and light enough for competition. Construction: The kit includes: One (1) 18mm x 12 in body tube, three (3) pre-cut plastic fins, one (1) CMR-style nose cone, one (1) Kevlar ® shock cord, and one (1) Nomex ® parachute protector. NOTE: This review is focused on the Simple Six which has been updated to the Super Six. The ...

Flights

Comments:

avatar
M.S. (September 1, 2000)
I had a rocket building class with a group of 6th graders. We ordered 42 kits and all arrived complete, in good condition. The class only had difficulty with knot tying. We used Elmers Carpenters glue with no trouble. All 42 rockets were launched on A8-3's with great flights. RockSim said we got 494 feet, which is possible. Drift was not bad with the supplied streamer, though 4 rockets ended up on the school roof. This is a great rocket for class building. The review was accurate.

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