I'll try to make one...

Amazing! That's an awesome way to let Lego Fly! Looking forward to your video.

Thanks for sharing this. My son asked me about a launchable LEGO rocket and I told him I thought it was not possible, but then after he went to bed I wondered, researched and ended up on this page. We built the smallest of these a few weeks back and launched her twice. The first time we used a C-motor, and the rocket only went up about 40 ft. before it turned and returned to the ground. The we tried the D12-7 and got a much more impressive launch (that ended up in the woods!). Ultimately, we lost about 12 pieces of LEGO - all of which we had replacements for. In the spring we'll give it another try with the Ds in a larger field.

I don't know how much they weigh; I don't have a scale. The smaller rocket flies about 350 feet. The larger rocket has never flown, mainly because all High-Power Rockets must be inspected at National Association of Rocketry (NAR)-sanctioned launches and it does not have a parachute! I'm going to design a new, Lego Technic rocket (with internal bracing to keep the various bricks together) so that I can add a parachute and fly it at NAR events. I may have to use several Lego Pirates sails and lots of wadding to protect the 'chutes from melting in heat of the motor's ejection charge.

Awesome! How much do your rockets weigh? Could you give me a guess at how high an Estes engine push your Lego rocket? Did you ever consider making your own custom parchute/recovery system for your Lego Rockets?

No, the rocket does not break up in the air; it comes down intact as a ballistic "lawn dart" and smashes into the ground. It is easily repaired, however, since Lego bricks are tough!

reallycool creations when you lunche it it brakes in the air?,, anyway if you have time can you comment an my creations tnx!!!

Excellent work!

Regarding the small rocket, the white Lego slopes acting as rocket fins DID GET SCORCHED when I did not provide an adequate "standoff" above the Estes launcher's blast plate. By using a LONG delay motor (like a 7-second delay D12-7), the rocket returns to the earth and breaks up into the component pieces BEFORE the ejection charge has a chance to scorch the inside of the rocket. Obviously, one must be careful not to do this in dry grass lest a fire start on the ground. If the fins or other pieces get too dirty or banged up, just switch them out with replacement pieces since NOTHING IS GLUED -- everything's a friction-fit!

That is really amazing!! good job. I always thought that the plastic would melt pretty easily but i guess not. really cool!

Cool! Thanks for the responce! I sure appriciate it!

Well, like I said, the rockets simply fall straight to the earth without parachute. Obviously, this is not ideal for NAR-sactioned launches :) . The flimsy plastic Estes parachutes wouldn't handle the weight of these rockets. There are nylon chutes that one can get off of eBay, but there's a problem of how to STOW the parachute inside the rocket. The Lego bricks are tightly bound together, and the rockets are one-piece. I wanted to keep all of these rockets 100% Lego (except for the motors). I suppose one could insert a cardboard tube inside the Lego modified plates to provide a SMOOTH surface for the parachute to get pushed out by the motor ejection charge. The black powder residue does tend to mar (and slightly melt) the Lego ABS plastic over time. The top of the rocket could be made into a two-piece deal, whereby the tube connects the two parts and Lego TILES are used to prevent the bricks from interlocking. Here's how to make your own STABLE rocket: 1) Make a cardboard cutout of the rocket's silhouette. Balance this cutout on a ruler, and mark the balance point. This is the "Center of Pressure". 2) Balance your real rocket model on a ruler (with the motors and parachutes installed!), and note the balance point. This is the "Center of Gravity." 3) The rocket will fly stable if the Center of Gravity is one-body-diameter ABOVE (ahead of) the Center of Pressure. If you need to adjust, make your fins bigger or move your weight upwards (forward).

Wow this is really creative. I really wish that I could make something like this with my LEGOs since I am into Estes rockets. Great work!!! PS: Do they use the Estes Parachutes or streamers or do they use something else?