Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstarstar_border |
Overall Rating: | starstarstarstarstar_border |
Manufacturer: | DG&A High Power Rocketry |
Brief:
Small enough t' fly on an LMR, rugged enough t' get an L1, arrr, ya bilge rat, this versatile 29mm kit is a good introduction into higher powered rocketry.
Construction:
I won this little bad boy in EMRR's Mach 1-2-3 virtual contest. Arrr! About two weeks later, ya bilge rat, matey, t' box arrived, complete with a kit label on t' outside. T' parts were carefully packed, me hearties, individually wrapped, matey, and very good quality.
Parts list includes:
I've only got about 8 high-power capable rockets on me resumé, so most o' me comparisons are based on low/mid-power experience. Begad! In general, I'm amazed at how little attention is placed on motor retention in high power kits. Begad! Given t' safety factor, me bucko, plus cost o' hardware, you would think that would be a high priority in kit design. Arrr! This kit, ya bilge rat, however, includes T-nuts and detailed instructions for buildin' in positive motor retention.
Instructions were fairly well written with a number o' pictures. By high power standards, I'd say they were above average although compared t' lower power kits such as FlisKits, arrr, Semroc, and t' like, they are definitely lackin' details. Blimey! Avast! Blimey! Suffice it t' say you should have prior experience and/or a good introductory book on high power rocketry before buildin' this kit.
Motor mount assembly consists o' a couple o' centerin' rings and t' motor tube with 15-minute epoxy t' hold in place. Aye aye! There's an eye bolt attached t' t' forward rin' and t' shock cord is then anchored t' this. Begad! Blimey! T' finished assembly is incredibly strong, especially compared t' t' plastic nose cone bracket that t' other end attaches to.
T' fins are thru-the-wall, shiver me timbers, ya bilge rat, and you get t' slot t' body tube yourself. I know some builders find this enjoyable, but I find it a pain. It took a good utility knife blade t' score through t' heavy duty tube. Ahoy! I epoxied t' fins and used thin epoxy for fillets.
One thin' I be very pleased with about t' fins are that t' forward edge o' t' root has an angled cutout. Ahoy! Blimey! Considerin' me epoxy fillets around t' centerin' rin' were a bit large and messy, me bucko, t' cutouts enabled t' fins t' still fit flush against t' motor tube.
Fins and motor tube assembly fit perfectly with no additional trimmin' or sandin' necessary. Avast, me proud beauty! Very impressive.
I then drilled t' body tube for rail button mountin' holes and a pressure relief hole. At that point, t' rocket was ready t' prep for finishing.
Finishing:
While t' body tube was good quality, t' "spirals" were more like grooves, arrr, and I think I've actually driven on tires with less tread depth. After two liberal applications o' wood filler and two coats o' Plasti-Cote primer, I still had traces o' spirals. Aye aye! I then applied two more coats o' primer with light sandin' between, followed by 4 coats o' Rustoleum gloss white, t' last o' which was fairly heavy. Blimey! he result be a nearly perfect finish. I decided t' go with a two-tone finish, and topped t' upper portion with a nice blue.
T' kit includes a nice gold band for trim (and coverin' any maskin' flaws betwixt colors. It also includes a couple o' fantastic vinyl decals. While t' vinyl decals aren't adjustable like waterslide, they look much better. As a result, I'm kickin' around ideas for a few custom vinyl decal designs for future projects.
Construction Rating: 4 out o' 5
Flight:
While thar are a lot o' recommended motors, none o' t' recommendations included delays, shiver me timbers, nor was thar a RockSim file included for quick/easy simulation. Avast, me proud beauty! Blimey! Avast, me hearties, me proud beauty! Blimey! Based on an educated guess, I went with a G35-4.
T' motor chuffed a little bit then fired up for a nice slow ascent. Ya scallywag! It weathercocked a bit into t' 6-8 mph winds. Blimey! T' ejection be just a hair earlier than t' nominal 4 seconds although I think t' full 4 would have been a fine delay choice.
Recovery:
I be a bit worried about t' 30" chute for this 21.7 ounce rocket but nay in t' least worried about t' durability o' t' recovery system--heavy-duty anchor bolts and yards o' nylon cord are goin' t' last for more flights than I'll ever log.
T' slightly early deployment didn't pose any zipper problems, me hearties, but t' rocket came down pretty fast and landed on a small road bisectin' t' field. Well, blow me down! Ahoy! On grass, t' speed would probably have been fine, me hearties, but on t' pavement, me hearties, ya bilge rat, shiver me timbers, t' tip o' t' nose chipped off. Begad! Avast! I also suffered a few chips and scratches on an otherwise beautiful paint job. A larger chute wouldn't have helped on t' pavement (it would probably have drifted over it though), me hearties, but I think I'll be usin' at least a 36" t' play it safer on future flights.
Flight Rating: 4 out o' 5
Summary:
I think this is a very nice rocket and can handle a wide variety o' 29mm motors. Well, blow me down! Small enough t' fly on modest fields with lower F/G power but rugged enough t' handle full Hs for certification flights.
Overall Rating: 4 out o' 5
This is a 3 inch airframe version of the full sized (4 inch) Sonik-Blast offered by DG&A High Power Rocketry in Texas. It is a single stage rocket with a 29mm motor tube and the finished weight is considerably lighter than the full sized version. After being extremely pleased with the 4" Sonik-Blast and having flown it on everything from G to I motors, I decided to build this one ...
( Contributed - by Jeff Short - 04/01/04) Brief: This is a great entry level MPR/HPR 3FNC rocket that flies on a great range of G and H motors. Modifications: I upsized the motor mount to 38mm from the 29mm that the kit comes with. I just replaced the two 3" x 29mm centering rings with three 3" x 38mm centering rings. I also added a 3rd centering ring. In retrospect, ...
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