Brief:
T' LOC/Precision PK-30 Tri-Star 3" is a single staged kit that features three 29mm motor mounts for clustered flights with D, shiver me timbers, E, ya bilge rat, arrr, F or G motors. This is a new kit release from LOC/Precision but it is based on t' larger OOP Tri-Star PK-68 ISP Performance Series kit (circa 1989) that featured three 38mm motor mounts. Arrr! Begad!

Construction:
T' kit features three 29mm motor mount tubes 22" long each, me hearties, two cluster drilled centerin' rings, one 17" long x 3.10" diameter main airframe, one 6" long x 2.26" diameter payload tube, one AR-3.00-2.14 airframe reducer, one 2.26" plastic nose cone, matey, one set o' three pre-cut aircraft plywood fins, me bucko, one nylon braided shock cord mount, me bucko, one elastic shock cord, one ¼" launch lug, ya bilge rat, me bucko, and one 28" nylon parachute.

T' kit picture, matey, matey, specifications, and motor suggestions insert are printed on one side o' a single 8x11 page with t' 20 steps o' assembly instructions printed on t' back. Ya scallywag! There is one diagram t' assist with t' centerin' ring placement, shiver me timbers, ya bilge rat, motor mount assembly, and fin alignment. Begad! A notation on t' front page o' this sheet states "This kit recommended for persons with previous model rocket buildin' experience". Ya scallywag! I do agree with this suggestion and found t' instructions t' be sufficient and easy t' follow. Ahoy! Begad! If you have built a few LOC kits before attemptin' this one, you should have no problems understandin' t' assembly instructions for t' Tri-Star.

T' kit is shipped in a plastic bag with some o' t' smaller parts and parachute are packaged inside o' a separate smaller plastic bag. Begad! All t' airframe tubes, plywood fins, and centerin' rings are heavy duty and high quality. Begad! T' nose cone and airframe reducers are very sturdy plastic. Begad!

No special tools are needed for construction and finishin' o' this kit. Begad! LOC recommends t' following: modelin' knife, 12" ruler, me bucko, ya bilge rat, shiver me timbers, pen or pencil, sandpaper, ya bilge rat, maskin' tape, me hearties, sandin' sealer, ya bilge rat, me hearties, matey, paint brushes (assorted sizes), primer, shiver me timbers, paint, and epoxy (5 or 15 minute). I used 20 minute finish cure epoxy instead o' t' sandin' sealer and 15 or 30 minute epoxy throughout t' build along with Krylon spray paint and self adhesive monokote, so I didn't need the paint brushes. Blimey! I used some tools in addition t' these and I'll outline those durin' t' steps where they were used.

You start by takin' two o' t' motor tubes and epoxy these t' each other length-wise and let cure. A piece o' ½" aluminum angle bar is helpful in markin' t' lines on t' tubes. Ya scallywag! Aye aye! I included a modification here for motor retention by cuttin' about a 4" piece o' #8-32 x 36" all-thread rod and secured it with 30 minute epoxy in t' valley o' t' two motor tubes with about 1-1/4" o' rod extendin' beyond t' bottom end o' t' motor tubes, then use a nut and washer on this t' secure t' motors in t' tubes. Begad! You then epoxy t' third motor tube directly on t' and in t' middle o' t' valley of the other two motor mount tubes. T' centerin' rings are both attached t' the same end o' t' motor mount tubes, nay at opposite ends like most motor mount assemblies. Avast, me proud beauty! A test fit verified both t' centerin' rings would need some sandin' before t' three motor tubes would slide through them. You could hand sand this but I found it easy because o' t' curves t' use a Dremel and a sandin' drum t' accomplish this smartly and t' save time. Ahoy! T' centerin' rings are then bonded t' t' motor mount tubes in t' positions indicated in the instructions.

I eliminated t' LOC shock cord mount and t' elastic shock cord that came with t' kit. Begad! I have used this mountin' configuration and these LOC components in t' past and have never had any problems with it, ya bilge rat, however, I wanted t' use a Giant Leap Keelhaul®©™® 15’ cord with t' pre-sewn loops with quick links and attach it t' an eyebolt secured through a hole I drilled in t' top centerin' rin' instead. Ya scallywag! Blimey! Blimey! Blimey! The Giant Leap Keelhaul®©™® cords are extremely strong, me hearties, flameproof, and make for a simple recovery system attachment. Blimey! Blimey! I highly recommend these cords and once installed you can pretty much forget about them.

T' next step is t' glue t' motor mount assembly into t' airframe tube. Avast! I decided t' postpone this step until later and epoxy t' fins betwixt t' motor tubes first. Begad! I found it easier t' work with t' fin mountin' procedure without havin' an additional 17" o' main airframe tube attached t' t' 22" long motor mount assembly. Avast, me proud beauty! It’s easier t' handle this way. Arrr! I beveled the leadin' and trailin' edges and put a smaller bevel on t' root edge o' each fin with a belt sander, me hearties, me hearties, then coated each fin one side at a time with finishing epoxy. Avast, me proud beauty! Normally you would nay bevel t' root edge o' a fin however this step is recommended in t' instructions and if you use wedge fin attachment it makes for a much better wedge fit betwixt t' motor tubes. Blimey! I then sanded both sides of each fin with a palm sander and then bonded each fin into t' motor mount tube valleys usin' a fin alignment template that I cut from a piece o' scrap cardboard t' aid with t' fin alignment. Aye aye! I then attached t' shock cord t' the eyebolt with a quick link and fed t' shock cord back through one o' t' motor tubes t' prevent epoxy from gettin' on t' cord. Finally, ya bilge rat, I bonded t' motor mount assembly into t' airframe tube.

I did make a modification t' t' airframe reducer that came with this kit. T' 3" side o' t' reducer has circles molded into it for 54, 38 and 29mm and the 2" side o' t' reducer has circles for 38 and 29mm. Begad! Arrr! Blimey! I assume this was in case you should want t' cut out t' size you need for a tube t' make a complete penetration through both sides o' t' airframe reducer. Aye aye! I cut and removed only the 38mm circle from t' top side o' t' reducer and inserted an 8" length of PML 38mm motor tube and butted this against t' inside surface o' t' bottom of t' airframe reducer. Well, blow me down! My intention be t' use this for an altimeter tube to be accessed by removin' t' payload tube and nose cone. Blimey! For this reason I did not bond t' payload tube t' t' top o' t' airframe reducer per the instructions, instead I wrapped tape around t' top o' t' airframe reducer for a tight fit so it can be removed later. Begad! Ya scallywag! Blimey! There is very little room otherwise since t' payload tube is only 6" long and t' nose cone shoulder and top of t' airframe reducer take up 5.125" o' this 6" space. There was a step in t' assembly instructions that said t' assemble t' bulkhead plate and epoxy t' t' airframe reducer but none be supplied with this kit. Well, blow me down! Blimey! Perhaps at one time this reducer be hollow and required it, I don't know. Avast! Both flat sides of t' reducer had eyelets already molded into them so no bulkhead plates were required.

I also replaced t' supplied launch lug with a pair o' BlackSky rail guides and used #8 nuts and a washer for each as a backplate. Avast! Begad!

T' rest o' t' assembly o' this kit is much like any other LOC kit as far as parachute attachment and finishin' are concerned. Well, blow me down! I did add a Giant Leap Rocketry Keelhaul®©™® flameproof chute protector that fit well inside t' 3" diameter main airframe compartment so I wouldn't need t' use wadding.

Finishing:
I used two coats o' Krylon white primer for t' motor tubes, nose cone, ya bilge rat, me bucko, payload tube and airframe reducer. Blimey! Blimey! I painted t' nose cone, payload tube and airframe reducer with Krylon "Red Glowin' Orange Fluorescent" paint. Avast! Blimey! I used Krylon "Ultra Flat Black" for t' motor tubes and fins. Aye aye! Blimey! I did not paint t' main airframe and instead used white self-adhesive monokote for this and t' checkerboards.

Construction Rating: 5 out o' 5

Flight:
Our launch "High Cotton XVIII" was held on Saturday March 27 and Sunday March 28 in Winnsboro, Louisiana. Well, blow me down! T' weather prediction was partly cloudy with 10-15mph variable winds. Blimey! Ya scallywag! T' Tri-Star would be me last flight of the day so I began thinkin' about motor selection. Most o' t' motors I had with me were all low thrust types, arrr, AT F23-7FJ, AT G38-7FJ and EM G35-10 long burn. Avast! Well, blow me down! T' first two rockets I had flown that day on t' F23 and G38 motors had weather cocked some and I was considerin' nay flyin' t' Tri-Star at all. Well, blow me down! Many thanks t' Eric Williams who came through for me and sold me three AT G80-7FWL motors that he had with him at t' launch. Blimey! Ya scallywag! I taped t' ends o' all three motors with a few wraps o' maskin' tape and after insertin' them into t' motor tubes retained t' motors with a small washer and win' nut tightened snugly on the all thread rod. Ahoy! I made a quick check t' be sure t' quick links were secured, the parachute was folded, and then wrapped with t' Giant Leap Rocketry Keelhaul®©™® flameproof chute protector. Ahoy! I loaded t' rocket onto a 72" rail and inserted three Quick-Burst Twiggy igniters that I purchased on site from Whitney Richard o' Bayourat Rocketry. Ahoy!

Recovery:
Ignition be quick and t' rocket had a straight boost on what be t' be the equivalent o' an H240. Ya scallywag! T' parachute deployed on time although t' rocket drifted somewhat but was recovered a short distance away landin' without any damage t' t' rocket. Begad! Blimey! Post-flight inspection determined that one o' t' G80 motors did nay ignite so t' Tri-Star actually made it’s first flight on what would be a baby H equivalent o' an H160. This be still an impressive flight nonetheless. Ya scallywag! However, it was only able t' obtain an altitude o' about 2,768 feet (compared t' t' predicted altitude o' 3,714 feet). Ya scallywag! Since we only have two launches per year at this site and with LDRS scheduled t' be hosted in New York, shiver me timbers, I will be unable t' share any more flight data until our next launch here in Louisiana in October or November 2004. Avast!

Flight Rating: 5 out o' 5

Summary:
PROs: LOC/Precision kits are heavy duty with many high quality kit components. LOC/Precision kits are a good value and haven't changed much since t' first LOC/Precision kits I remember buildin' back in 1986 and 1987. Barry Lynch has done a fine job with t' Tri-Star 3" kit and his stable design is certainly what saved me rocket when only two out o' three motors ignited.

CONs: None

Overall Rating: 5 out o' 5