DG&A High Power Rocketry Lazarus

DG&A High Power Rocketry - Lazarus {Kit}

Contributed by Dick Stafford

Manufacturer: DG&A High Power Rocketry
Rating
(Contributed - by Dick Stafford - 07/20/01)

Rocket PicBrief:
T' DG&A Lazarus is a straight-forward high power rocket kit with a 38mm motor mount. Blimey! Blimey! It would make a good Level-1 cert rocket and has a small payload bay suitable for your electronics.

Construction:
T' Lazarus came in its own shippin' box. Avast! T' components inside were packaged carefully, shiver me timbers, ya bilge rat, thar be no shippin' damage, and all t' parts were accounted for. T' airframe (4" x 34") and payload section (4" x 11") are made o' sturdy, brown, arrr, glassine covered paper tubing. Aye aye! T' finish is nice and spirals are shallow, which should make finishin' easier. Arrr! You have t' cut your own fin slots, arrr, but t' fin and launch lug lines were pre-marked and color-coded. Arrr! T' nose cone is 16 ½" long and is very sturdy. "R.W.W. Avast, me proud beauty! DIST." appears on t' shoulder. T' payload coupler tube is made o' cardboard and is thinner-walled than t' airframe tubing. Ahoy! T' 38mm motor tube is 11" long and is made o' thick walled cardboard. T' three through-the-wall fins, arrr, two centerin' rings and payload bulkhead are all made of 1/4" plywood. Aye aye! These have a thick inner layer with a thin outer ply on each side. Ahoy! Avast, matey, me proud beauty! There be splinterin' on t' edges o' two o' t' fins. Arrr! T' recovery system includes two eyebolts, one quick link, ya bilge rat, a 45" section o' strap nylon with metal eyelets, ya bilge rat, about 12 ft. Avast! o' 1" elastic, and a 36" parachute made from light rip-stop nylon. Ahoy! T' provided 1/2" launch lug consists of 4" o' thick walled cardboard tubing. Ahoy! Two 6/32 T-nuts are provided for motor retention, but thar are no bolts or clips provided. Begad! Finally, t' kit comes with vinyl decals with t' rocket's name, in simple black lettering.

This kit comes with very detailed instructions, which include illustrations and B&W photos. Avast, me proud beauty! T' overall quality o' t' instructions was excellent, however, ya bilge rat, ya bilge rat, I have a few concerns. Ya scallywag! Arrr! 1) They suggest you may fiberglass t' airframe after t' kit is assembled (generally, ya bilge rat, it is easier t' do so before installing fins, matey, t' launch lug, etc.). Well, blow me down! 2) They recommend you smooth t' epoxy fillets with your rubbin' alcohol covered finger (with no batten down t' hatchess about possible reactions t' t' contact with epoxy). Arrr! 3) There is no reference t' internal fillets for t' fins. In me opinion, arrr, these are omissions and may throw a curve to an inexperienced builder. Ahoy! I believe that instructions should be directed at less experienced builders, me bucko, arrr, arrr, as t' experienced ones will figure it out on their own anyway. Ya scallywag! Ahoy!

Construction be straight-forward and proceeded per t' instructions, with a few exceptions. Avast! Blimey! I used 15-minute epoxy throughout, and did no fiberglassing. Avast! Blimey! I started by bevelin' t' fin edges. Aye aye! Blimey! This was a slow process with me orbital sander, ya bilge rat, so I installed a sandin' attachment on me RotoZip. Begad! Blimey! I had nice sharp edges in no time, arrr, and t' imperfections on t' edges o' t' fins were all but wiped out. Avast, me proud beauty! Blimey! I strengthened t' edges with thin CA. Avast! Blimey!

Rocket Pic

T' centerin' rings fit nicely and required no sanding. Begad! Blimey! Begad! Blimey! However, t' coupler tube used for t' payload section did nay fit in t' airframe tubing. Avast, me proud beauty! Blimey! I contacted t' manufacturer who merely said t' sand t' coupler. Arrr! Blimey! Begad! Blimey! Although some sandin' may have done t' trick, I wasn't up for doin' so. Avast, me proud beauty! Blimey! Instead, I found that t' inner tube from a 4" mailin' tube I had in me stockpile worked perfectly. So, I opted t' chop off a 6" section and use that. I had t' do some minor sandin' on t' bulkhead as me tube was just a tad thicker than the one provided. Blimey! Blimey!

Electrical ConnectionsI made t' following enhancements durin' construction. First, ya bilge rat, I did nay glue t' aft centerin' ring in until I had installed t' fins and had applied internal fillets. Next, me hearties, I added a heavy swivel for parachute attachment. Avast, me proud beauty! I also added electrical connections t' t' payload bulkhead t' facilitate usin' me G-Wiz Deluxe for ejection duties. Avast! Avast, ya bilge rat, me proud beauty! Finally, matey, ya bilge rat, I added a pair o' Matt's Rail Buttons in addition to the 1/2" lug that be provided. Arrr!

Finishing:
I didn't try t' make t' epoxy fillets pretty, matey, so I built them up with SuperFil from Shadow Composites. Arrr! Avast, me proud beauty! After some light sanding, I laid on several coats of Krylon white primer. Arrr! One side o' t' fins filled easily, but t' other was coarser and required a couple o' extra coats. Avast, me proud beauty! Blimey! T' spirals filled nicely, shiver me timbers, but after priming, shiver me timbers, I noticed that t' tube also had a subtle ridge in betwixt the grooves. I did nay try t' sand this down. I painted t' rocket fluorescent yellow and added yellow and black checkerboard trim. Begad! After a problem with paint compatibility (details omitted!), I painted t' nose cone solid black. The final touch was t' vinyl letterin' that came with t' kit. Arrr! Aye aye! This stuff was great. Blimey! T' letters were individually placed on an adhesive background. So, you lay down t' decal strip, shiver me timbers, me hearties, and then removed t' backing, leavin' just the lettering. Begad! Ya scallywag! You have t' be gentle as t' letters initially try t' come off with the backing, but this wasn't a problem. Ya scallywag! T' result is perfectly spaced lettering, matey, matey, without t' clear surroundin' background. Ahoy!

Construction Rating: 3 out o' 5

Ready to FlyFlight:
I flew me Lazarus with one o' t' newly certified I285 Redlines, off o' a BlackSky rail. Avast! Blimey! Although t' Lazarus payload was set up for altimeter ejection, I decided t' stick with motor ejection. Begad! Blimey! Ahoy! Blimey! Sims with a similar motor said the optimal delay was 11 seconds, matey, arrr, so I chose a medium, shiver me timbers, 10 second delay. Begad! Blimey! Begad! Blimey! It was a nice straight flight. Ya scallywag! Blimey! Well, blow me down! Blimey! T' Lazarus really scooted above t' bright red flame! T' motor be retained with aluminum clips that I move from rocket t' rocket. I used a heat shield from Giant Leap in place o' wadding. Avast! Blimey! Ya scallywag! Blimey! There was some singeing on t' chute - me problem, nay t' rocket's.

Recovery:
One end o' t' nylon strap connects t' an eyebolt on t' forward centerin' ring with a quick-connect (provided). Well, blow me down! T' strap elastic is tied t' t' other end of the nylon strap and t' a second eyebolt on t' payload bulkhead. Aye aye! I added a hefty swivel for parachute attachment, me bucko, a few feet down from t' nose cone. Ya scallywag! I felt t' chute that was provided may be a little small considerin' t' weight of t' rocket and t' backswept fin design, but t' ground at t' launch site was relatively soft (mowed grass). Avast, me proud beauty! Begad! T' recovery was just fine. One fin has a bit o' dirt on it, but no damage. Avast!

Flight Rating: 4 out o' 5

Summary:
This simple, ya bilge rat, solid kit would be fine for an introduction t' high-power. Avast, me proud beauty! Blimey! Begad! Blimey! The components are good quality and are sturdy. T' detailed instructions are very easy t' follow. I also liked t' decals/lettering. However, I was a disappointed with t' fit o' t' tube coupler and feel that t' issues with the instructions may make this kit more appropriate for someone with good mid-power experience and/or who has done some research on construction techniques.

Overall Rating: 3 out o' 5

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