Estes X-Prize Lucky Seven

Estes - X-Prize Lucky Seven {Kit}

Contributed by Chris Gonnerman

Construction Rating: starstarstarstar_borderstar_border
Flight Rating: starstarstar_borderstar_borderstar_border
Overall Rating: starstarstar_borderstar_borderstar_border
Manufacturer: Estes

Estes Lucky Seven

Brief:
This is a semi-scale model o' t' Acceleration Engineerin' "Lucky Seven" rocket, ya bilge rat, matey, arrr, one o' t' contestants for t' Ansari X-Prize.

Construction:
This is a largely plastic rocket. Begad! Aye aye! T' package includes a three-piece plastic nose cone (two side halves and a bulkhead), a plastic body tube with integral bulkhead, arrr, a plastic tail bulkhead, four plastic decorative nozzles, me hearties, four plastic fins, shiver me timbers, a paper engine tube, arrr, a standard engine hook, a short (too short) length o' shock cord, me hearties, me hearties, a 12" pre-assembled parachute, a sheet o' stickers, matey, and a wad o' modelin' clay for nose weight.

Note: I've built one o' these kits myself, matey, and assisted in assemblin' another, shiver me timbers, so t' followin' review draws from both experiences.

T' instructions are pretty typical for an Estes kit: logical but lackin' in some details. Begad! First, t' paper engine tube and engine hook get inserted into t' body section, followed by t' fins, shiver me timbers, me bucko, which slide into slots in t' body. Begad! Ahoy! Blimey! At this point thar be no glue yet, but t' next step makes up for that omission as you are expected t' glue t' nozzles t' t' base then glue it t' t' body. Blimey! Blimey! This is nay a good idea...if you want t' nozzles on t' rocket, leave them off until t' rest o' t' rocket is complete. Begad! Blimey! Also, t' instructions call for usin' plastic cement on t' end o' t' paper body tube t' secure it t' t' base, matey, which frankly does nothing. Ya scallywag! I recommend usin' Superglue instead but go easy on it so it does nay swell t' end o' t' paper tube.

When all this is done, you have an assembled body which may rattle because t' fins aren't glued t' t' body, me bucko, me bucko, just held in place in their slots. Arrr! Blimey! In our case, shiver me timbers, matey, they fit tightly on one model, me bucko, but one fin rattled somewhat on t' other.

Next, t' nose cone "cap" (bulkhead) is glued t' one half o' t' nose cone and allowed t' dry. Avast! Blimey! Blimey! Blimey! Then, modelin' clay is pushed into t' upper end o' t' cone, me bucko, me hearties, half o' t' clay in one side and half in t' other. Well, blow me down! Blimey! Begad! Blimey! Finally, ya bilge rat, t' shock cord is tied t' t' cap, matey, arrr, shiver me timbers, glue is applied, me hearties, and t' nose cone is completely assembled.

This didn't work well in either o' our kits. In both cases, t' cap didn't stay put while t' cone be assembled, ya bilge rat, resultin' in a "fishin' expedition" t' insert t' cap. T' nose cone is more than half empty space t' allow for t' parachute since t' body section is so small. Ya scallywag! In both cases, we chose t' re-glue t' cap with Superglue instead o' more plastic cement.

Finally, shiver me timbers, after tyin' t' other end o' t' shock cord t' t' lug inside t' body section, me hearties, you can attach t' parachute usin' t' standard "parachute through t' shroud lines" method.

Finishing:
T' rocket is pre-colored so thar be no paintin' t' do. Stickers are available t' apply t' t' rocket, and in this case t' instructions actually tell you where t' stick them although it's nay hard t' figure out.

Construction Rating: 3 out o' 5

Flight:
I've flown this rocket twice on t' recommended A10-3T engines. Well, blow me down! Blimey! In both cases, ya bilge rat, t' rocket came off t' pad pretty smartly but then seemed almost ready t' fall over at around 50' or so. This is nay a high-flyin' rocket. Blimey! Blimey! T' flight pattern is pretty easy t' understand if you look at t' thrust curve o' t' A10-3T engine. Avast! Blimey! It hits pretty hard for a fraction o' a second then falls off t' a low thrust level for t' remainder o' t' flight. Arrr! Blimey! Begad! Blimey! It's me opinion that t' low thrust level is nay adequate t' lift this relatively heavy model or even keep it ascending. T' Lucky Seven model just barely flies. Blimey! Blimey! I haven't weighed it (I got t' weight from Estes' website), me bucko, but I'm suspicious that it's real close t' t' maximum for t' engine.

In its defense, it is a good small field rocket since it sure isn't goin' far.

Recovery:
Three seconds o' ejection delay is long enough but only just. T' rocket can't afford t' fall for long considerin' that it hasn't made it very high when t' engine burns out, and it sure doesn't coast long.

Flight Rating: 2 out o' 5

Summary:
Frankly, me hearties, t' Lucky Seven rocket has very little goin' for it. Ya scallywag! It's nay a handsome rocket, shiver me timbers, it doesn't fly all that well, and it's can be a bit o' a hassle t' assemble. Aye aye! Well, blow me down! Other than flyin' it in small fields, shiver me timbers, I can't see any good reason t' buy one.

Overall Rating: 2 out o' 5

Other Reviews
  • Estes X-Prize Lucky Seven By John Thro

    The Estes Lucky Seven is a 1:50 scale model of the rocket being designed and built by Acceleration Engineering. It features 95% plastic construction, Estes mini-engine power, and parachute recovery. Santa brought this kit for my 5 year-old son for Christmas 2004. This model is made entirely of plastic, except for the motor tube, motor hook, shock cord and parachute. Here is a reasonably ...

  • Estes X-Prize Lucky Seven By Alan Tuskes

    Brief: 1:50 Scale model of the Acceleration Engineering LLC's entry in the X-Prize race. Single stage, parachute recovery. Skill level E2X. Construction: The kit includes: 1 BT-5 engine mount 1 mini engine hook 1 rubber (REAL rubber) shock cord. 1 12" chute clay weight plastic parts: nose cone assembly (2 halves, nose cone cap) body and body ...

  • Estes X-Prize Lucky Seven By Donald Besaw Jr

    Brief: The Estes X-Prize Lucky Seven is a 1:50 scale model of Acceleration Engineering's Ansari X-Prize entry. This model flies on an A10-3T motor up to 200 feet and uses a 12 inch parachute for recovery. Construction: The kit came in a plastic bag with header card and included: 1 motor tube 1 motor retention hook 1 pack of clay weight 1 rubber shock cord 1 12 ...

Flights

Comments:

avatar
K.J. (January 30, 2005)
Good review- matched my building experience. It was hard to tie on the shock cord. I built mine during one episode of The West Wing. Prepping for flight- there really isn't much room in the rocket body for the chute. I was afraid it wold get pushed up into the nose cone and not come out, and it did take quite a while for it to open. Nice straight boosts (about twice as high as a Mini Mars Lander).

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