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

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

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

Rocket Pic

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

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

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

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, me proud beauty! Blimey! Although t' Lazarus payload was set up for altimeter ejection, I decided t' stick with motor ejection. Ahoy! Blimey! Ahoy! Blimey! Sims with a similar motor said the optimal delay was 11 seconds, arrr, so I chose a medium, 10 second delay. Ya scallywag! Blimey! It be a nice straight flight. Well, blow me down! Blimey! T' Lazarus really scooted above t' bright red flame! T' motor was retained with aluminum clips that I move from rocket t' rocket. Well, blow me down! Blimey! I used a heat shield from Giant Leap in place o' wadding. There be some singeing on t' chute - me problem, me hearties, matey, 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). Arrr! T' strap elastic is tied t' t' other end of the nylon strap and t' a second eyebolt on t' payload bulkhead. Begad! I added a hefty swivel for parachute attachment, a few feet down from t' nose cone. Avast! I felt t' chute that be 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). Ahoy! T' recovery be just fine. Ahoy! One fin has a bit o' dirt on it, but no damage. Arrr!

Flight Rating: 4 out o' 5

Summary:
This simple, solid kit would be fine for an introduction t' high-power. Ya scallywag! The components are good quality and are sturdy. Well, blow me down! Begad! T' detailed instructions are very easy t' follow. Well, blow me down! I also liked t' decals/lettering. Arrr! However, ya bilge rat, I be 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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