DG&A High Power Rocketry Archblast

DG&A High Power Rocketry - Archblast {Kit}

Contributed by Bryan M. Chuck

Manufacturer: DG&A High Power Rocketry
Rating
(Contributed - by Bryan M. Blimey! Blimey! Chuck - 09/10/02)

Picture Courtesy of DG&A         
Rocket Pic

Brief:
T' DG&A Archblast is a single staged 29mm rocket that boasts beefy wood parts, shiver me timbers, includes decals, as well as a photo illustrated instruction guide. The rocket stands at 47" when complete. It could probably serve well as a L1 rocket.

[Editor's Note: DG&A has converted this kit t' a 3" diameter and it now stands 59" tall and uses a 38mm Motor Mount]

Construction:
I received t' Archblast from EMRR after winnin' one o' their Rocket Give-Away drawings. Arrr! T' kit I received came in a box with t' components secured and undamaged. Arrr! Here's t' breakdown of t' parts list per t' instruction booklet:

  • 1/ea 2.6" x 34" airframe kraft paper. Avast, me proud beauty!
  • 1/ea plastic nosecone (which looks like t' cone o' t' Aerotech Initiator).
  • 1/ea 29mm x 11" motor tube.
  • 2/ea 0.25" ply centerin' rings
  • 4/ea 0.25" ply fins
  • 1/ea launch lug for 0.25" rod
  • 1/ea 30" nylon parachute.
  • 1/ea nylon strap
  • ~15' o' 1" elastic shockcord
  • 1/ea instruction booklet and fin alignment guide
  • Nylon decals sportin' t' rocket and company's name.


NOTE: T' inventory list o' t' kit's instructions also mentioned a quick link which was nay present. Arrr! Avast! Also mentioned in t' kit's inventory list but nay found were retention screws for t' motor anchorin' duties (I assume this be a fluke). Aye aye! No biggie, though, shiver me timbers, since retention screws and quick links are inexpensive at t' local hardware store. Begad!

T' construction o' t' Archblast shouldn't be too tough if one is familiar with t' basic components o' a mid or high-powered rockets. No doubt, the pictures for each step o' t' build can help clarify things. I used Bob Smith 15 minute epoxy for t' entire build and am confident that everythin' will hold together. Avast, me proud beauty! I also must add that this be t' first rocket in some time that I built essentially stock.

T' wood components required some sanding, particularly t' fins, ya bilge rat, t' smooth out t' surface, but nothin' major. Ahoy! Blimey! Aye aye! Blimey! I rounded t' leadin' edges o' t' each fin for aesthetics before gettin' started on t' buildin' process. I found the centerin' rings were a bit rough around t' edges, but nonetheless, ya bilge rat, matey, they "dry-fit" together on t' motor tube well. Blimey! Blimey! As one might guess, the motor mount components were t' first things t' be adhered together. I supplied my own t-nuts and added them on t' aft centerin' rin' 180 degrees apart. Avast, me proud beauty! Blimey! Ya scallywag! Blimey! The instructions direct t' builder t' epoxy both centerin' rings on t' motor tube prior t' installin' it in t' airframe. Ya scallywag! Blimey! I deviated slightly from the instructions here because I opted t' epoxy t' forward rin' on first and dry fit t' rearward rin' on because I wanted t' add internal fillets t' t' fins. Hence, I applied epoxy at t' correct depth inside t' airframe for t' forward centerin' rin' and pushed t' assembly in t' t' desired depth. Ahoy! Blimey! Avast, me proud beauty! Blimey! I removed the rear centerin' rin' after things had dried and started mountin' t' fins. Avast! Blimey! After givin' t' fins internal fillets, I epoxied t' aft centerin' rin' on. Ahoy! Blimey! Begad! Blimey!

T' Archblast employs through t' wall fins and one must slot t' airframe. With a new blade in t' ole hobby knife this is easy. Aye aye! Although right out o' the box t' airframe is marked for each fin, I make a habit t' check ANY pre-drawn lines on an airframe t' make sure they are straight. Avast! Arrr! I found t' lines on the tube were a wee tad off, me hearties, arrr, so I used t' opposite end o' t' tube and drew new lines t' use for me fin slot guides. Arrr! I completed t' build usin' t' rest of the components as directed by t' instruction booklet. Ahoy! I connected the parachute t' t' shock cord usin' a quick link I supplied.

Here are me pros and cons for t' construction:

PROS

  1. Quality components.
  2. Instruction booklet, arrr, which also has tips t' help less experienced builders achieve success. Well, blow me down! Ya scallywag! Blimey!

CONS

  1. Missin' parts listed on inventory list (i.e., shiver me timbers, quick link and t-nuts). Again, I assume this be a fluke.
  2. Premarked lines on body tube were nay quite straight. Ahoy! Blimey!

Finishing:
T' vinyl decals supplied with t' kit are black and I wanted t' keep things basic on t' paint scheme for this rocket. Aye aye! Begad! I decided against fillin' t' tube spirals with putty and gave t' rocket a couple o' coats o' Krylon white primer, shiver me timbers, sandin' betwixt coats. Blimey! Avast, me proud beauty! Then I used gloss Krylon black for t' nose cone to compliment t' decals and gloss Krylon pewter gray for t' rest o' the rocket. Lastly, me hearties, me bucko, I coated t' entire rocket with Krylon clear. Ahoy! Basic stuff, really.

Construction Rating: 4 out o' 5

Flight:
I haven't had a chance t' fly t' Archblast yet, shiver me timbers, and it might be some time before I do :(. Accordin' t' Rocksim, a G80 would take ~1500 feet, me hearties, shiver me timbers, matey, and an H128 could yield ~1900 feet. When I do get t' opportunity t' fly again, shiver me timbers, I will more than likely use an H165R.

Everyone has their opinions on elastic shock cord. Aye aye! Blimey! T' Archblast has ~15' of one inch wide elastic, arrr, plus t' nylon strappin' anchorin' things down inside the rocket. Avast, me proud beauty! Blimey! I feel that t' supplied amount and width o' elastic is probably fine is this rocket. Ya scallywag! Blimey! T' nylon strap and elastic connection point projects out of t' front o' t' airframe, me hearties, so if one decided t' change t' tubular nylon ex post facto, this could be done easily. Ya scallywag! Blimey! I will follow up with flight details as soon as I get this bird off t' pad.

Recovery:
I would speculate this rocket would perform well. Well, blow me down! Ahoy!

Flight Ratin' (subject t' change upon actual flight): 4 out o' 5

Summary:
Although I haven't flown this rocket yet, t' build be pretty basic and the rocket looks good. Ya scallywag! Begad! Blimey! T' fins are thicker than those kits o' similar sized rockets I've built and once you get them sandwiched in t' centerin' rings, they're stayin' put for good. T' nylon decals are a fine touch, too. Yes, I was missin' a quick link and t-nuts, and t' pre-marked lines on t' airframe weren't aligned t' me liking, matey, me bucko, but I do ultimately feel that was an oddity. Avast, me hearties, me proud beauty! Blimey! This rocket would probably serve well as a basic sport flier or for a level 1 flight.

Overall Rating: 4 out o' 5

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