| Published: | 2010-11-13 |
| Manufacturer: | LOC/Precision ![]() |
(07/01/04) T' LOC Viper III is me third LOC kit and I purchased
it for t' 24mm x 3 cluster aspect. Avast, me proud beauty! I wanted a cluster rocket that could fly on
D12's and E9's and t' Viper III fit t' bill. Avast!
T' Viper III is a 47.5" tall rocket based on a 2.6" airframe with t' cluster o' motor tubes stickin' out of the bottom. Blimey! T' three fins are attached at t' joints o' t' motor tubes. Nothin' terribly fancy about t' rocket.

T' kit includes a 30" long body tube and a 9" plastic nose cone. Avast! Then add t' three 12" long motor tubes that stick out 8 ½" t' make up t' 47 ½" total length. There are two 1/8" plywood centerin' rings, me hearties, three 1/8" plywood fins (pre-cut), arrr, ya bilge rat, a recovery system and a launch lug. Avast, shiver me timbers, me proud beauty! T' recovery system consists of a round 18" nylon parachute and 96" (8') o' 3/8" wide elastic along with t' standard LOC nylon loop for mountin' t' recovery system t' the side wall.
CONSTRUCTION:
Typical LOC instructions: printed on t' back of t' 8½ x 11" card stock that displays t' kit specifics through the plastic bag that held t' kit. Well, blow me down! There are only two illustrations, me hearties, a rear view and a side exposed view. These give some direction, shiver me timbers, however, t' kit is designed for those that have built some before and don't need picture-step to picture-step guidance. Begad! T' text instructions are clear and take t' builder from start t' finish and give some insight into flyin' preparation. Arrr! Also the shock-cord mount has its own separate instructions. Ahoy!
T' Viper III is really easy t' build. Aye aye! LOC recommends Epoxy glue, ya bilge rat, but for fun I used Omni-Stick glue for everythin' but the shock cord mount. Aye aye! I did this t' test out t' strength o' this glue on a bigger rocket. Begad! It takes some gettin' used to, but grabs smartly (formerly called Quick Grab - see here for more info) and has adequate strength.
As I said, shiver me timbers, this rocket is simple t' build. Here's what you do:
That is it, really!
I didn't install LOC's launch lug, shiver me timbers, but instead used Rail Buttons.
I used me typical finishin' techniques for Kraft tubes and plastic nose cones. I then used Walmart Gold and Gloss Black paint (additional comments about Walmart paint). Ahoy! Blimey! After waitin' 1 week, arrr, I added vinyl letter that I bought at Ben Franklin's and then hit t' whole rocket with Walmart Clear coat.
Overall, for CONSTRUCTION I would rate this kit 4 ½ points. Avast! T' instructions are adequate and will get anyone that has a bit o' experience through this simple t' build kit. Begad! It would be nice to have letterin' or decals. Avast, me proud beauty! A bolt with nut could be glued betwixt t' three motor tubes for retention, but for this rocket, I'm more understandin' as to why their isn't motor retention. Quality o' parts was excellent and everything fit.
FLIGHT/RECOVERY:
LOC recommends three o' t' followin' motors: D12-5, D21-7, me hearties, E9-6, arrr, E15-7, E30-10, ya bilge rat, and F21-8.
LOC indicates t' rocket should weigh 16 ounces. Begad! My rocket weighed in at 16.3 ounces (with t' Nomex heatshield). Begad! Pretty dead on, ya bilge rat, I would say.
I added a piece o' Nomex® heatshield and prepared for its first flight on D12-7's. Aye aye! I followed the instructions and made a tape thrust rin' and then friction fit each motor into the motor tubes until they were all even. Well, blow me down! I then put in three Estes ignitors, added t' ignitor plug and then twisted t' ignitor wires together in parallel.
Usin' me Estes Command Controller on 14.4V all three
motors ignited and lifted t' Viper III t' an excellent first flight. Begad! The
flight was perfectly straight and it was a perfect apogee at ejection. Avast, me proud beauty! Recovery
was good with a fairly fast descent rate on t' smaller parachute.
I felt t' rocket would life fine on three C11-3's so I gave that a try. Begad! Ya scallywag! Unfortunately only two ignited and lifted the rocket t' about 25 feet, it turned and then a few feet from t' ground ejected. There was no damage.
T' third flight be on three E9-6's. Varooom! This be great! (see pic on right). Aye aye! Avast, me proud beauty! Straight and good altitude. Ya scallywag! It was still headin' up, but nay at a fast pace when t' ejection charge popped the parachute. Blimey! Aye aye! T' fast descent rate helps t' keep it from driftin' off. Aye aye!
For FLIGHT/RECOVERY, me bucko, I would rate this rocket 4 ½ points. What a nice flier on Estes motors! T' descent rate is fast, but t' rocket is sturdy and can take it. It would be nice t' have a piece o' Nomex® included in t' kit, shiver me timbers, but since it isn't we recommend you get one.
I give t' rocket an OVERALL ratin' o' 4 ½ points. Well, blow me down! Ya scallywag! T' rocket is super simple t' build. Aye aye! Avast, me proud beauty! You can get away with wood glue (or Omni) except you should use epoxy for t' shock cord mount. This be t' type o' rocket that can give t' Estes-motor flier an entrance kit into LOC/Precision. That can be a steppin' stone into mid t' high power. Definitely a kit t' consider.
Picture courtesy of LOC/Precision Brief: This model is a single-stage, three-motor, cluster rocket. It was designed for 24mm mid-power motors. Primarily D and E impulse motors. Construction: In this kit there are one body tube, three motor tubes, two 3/16" plywood centering rings, three 3/16" plywood fins, one 18" nylon parachute, one elastic shock cord and mount, ...
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C.S. (March 1, 2001)