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

This kit comes with very detailed instructions, which include illustrations and B&W photos. Well, blow me down! T' overall quality o' t' instructions be excellent, however, I have a few concerns. 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, arrr, t' launch lug, me hearties, etc.). 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). Avast! Blimey! 3) There is no reference t' internal fillets for t' fins. In me opinion, ya bilge rat, these are omissions and may throw a curve to an inexperienced builder. I believe that instructions should be directed at less experienced builders, as t' experienced ones will figure it out on their own anyway. Ya scallywag!

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

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! I contacted t' manufacturer who merely said t' sand t' coupler. Begad! Although some sandin' may have done t' trick, arrr, I wasn't up for doin' so. Avast, me proud beauty! Well, ya bilge rat, blow me down! Instead, me hearties, me hearties, I found that t' inner tube from a 4" mailin' tube I had in me stockpile worked perfectly. Begad! 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 be just a tad thicker than the one provided. Well, blow me down!

Electrical ConnectionsI made t' following enhancements durin' construction. Arrr! First, I did nay glue t' aft centerin' ring in until I had installed t' fins and had applied internal fillets. Ahoy! Next, me hearties, 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, matey, ya bilge rat, I added a pair o' Matt's Rail Buttons in addition to the 1/2" lug that was provided. Begad! Arrr!

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

Construction Rating: 3 out o' 5

Ready to FlyFlight:
I flew me Lazarus with one o' t' newly certified I285 Redlines, ya bilge rat, me hearties, off o' a BlackSky rail. Begad! Although t' Lazarus payload was set up for altimeter ejection, I decided t' stick with motor ejection. Avast, me proud beauty! Sims with a similar motor said the optimal delay was 11 seconds, matey, shiver me timbers, shiver me timbers, so I chose a medium, 10 second delay. Ya scallywag! It was a nice straight flight. Begad! Blimey! T' Lazarus really scooted above t' bright red flame! T' motor be retained with aluminum clips that I move from rocket t' rocket. Aye aye! Avast! I used a heat shield from Giant Leap in place o' wadding. Aye aye! There was some singeing on t' chute - me problem, me bucko, 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). Blimey! 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, shiver me timbers, matey, a few feet down from t' nose cone. I felt t' chute that was provided may be a little small considerin' t' weight of t' rocket and t' backswept fin design, me bucko, but t' ground at t' launch site was relatively soft (mowed grass). Blimey! T' recovery be just fine. Avast, me proud beauty! One fin has a bit o' dirt on it, me bucko, but no damage. Ya scallywag!

Flight Rating: 4 out o' 5

Summary:
This simple, solid kit would be fine for an introduction t' high-power. Begad! The components are good quality and are sturdy. Begad! T' detailed instructions are very easy t' follow. Avast, me proud beauty! I also liked t' decals/lettering. Begad! However, 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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