Final Design

We opted because that a machine with the features we had identified as finest during testing: a solid, diamond-shaped inside structure, a weak crushable external shell,and slim spikes top top the outside. Us surmised that this outer shell would certainly deform on influence and absorb kinetic energy, as well as lengthen the decelerationdistance that the egg and also thereby minimize the force on it during landing.

You are watching: Egg drop project toothpicks and glue

Materials

numerous boxes the toothpicks hot glue, about 5 big sticks raw Egg warm glue gun

Instructions

NOTE: Make her glue joints in the to like structure strong enough to organize together, but not so strong that they will not break throughout landing. Also, blow on joints together they"re drying normally does more harm than great by shifting the toothpicks far from the joint.

Select four toothpicks then develop a square through them by lining increase each end at a appropriate angle and making sure each that the 2 opposite sides room parallel. When satisfied through the general shape dab a small section of glue at every vertex.
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Select three toothpicks then create a “U” shape, basically the same figure as before, except one side will certainly be removed, climate dab a small section of glue at each vertex.
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Repeat the over step 3 times.Begin through the square shape, then attach a “U” to one side through glue in ~ the 2 vertexes. Connect two much more “U’s” in parallel utilizing the warm glue.
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Repeat actions 1-4 for this reason that an additional one the these shapes is created.Select one of the lengthy sides of the 4x1 shape and also attach one tooth choose aiming away from the framework to every joint utilizing a dab the glue.
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Repeat step 6 on the various other 4x1 for this reason the same shape is created.Connect the 2 4x2 piece by lining up the open up ends of each shape in parallel and also joining each intersection with a dab of glue.
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Next choose 4 toothpicks and also complete the 4x4 grid by connecting them perpendicularly come the joints made in the previous action with a dab the glue.
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Next develop in the increase direction by attaching one toothpick v a dab of adhesive to every joint on one side of the grid. The toothpicks need to be oriented so the every edge in the number is 90 degrees. The increase picks need to be perpendicular to the grid.
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Every upward expanding toothpick, except for the one in the an extremely center then demands to be extended one much more pick up. Put a choose on each pick from the previous action in parallel and also place a dab that glue in ~ the place where the two tips meet.
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Repeat procedures 1-11 for this reason that 2 of the figures above exist.Now the rigid facility needs to be created; this is where the egg will sit. To carry out this integrate groups the 3 toothpicks in parallel in order to do a stronger member. This is most easily completed by placing 2 toothpicks in parallel, emotional one another, and running a line of adhesive in in between them.Then, before the adhesive dries, place the third pick on optimal of the adhesive line.
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Repeat the above procedure 12 times.Take the 12 rods and also separate castle into groups of two. Then, produce 6 “L” shaped structures by lining up 2 rods perpendicular, put the advice together, and gluing the joint where they meet.
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Take 2 “L” shapes and also create a square utilizing the same methods as in action 1.
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select two “L” shapes and also glue the vertices indigenous each piece to one one more at a 90-degree angle.
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Repeat the over step as soon as more, so 2 pyramids exist.Create a diamond by connecting a pyramid to every side of the square through gluing a leg of the pyramid come a corresponding vertex of the square. Before the diamond is completely enclosed ar the egg inside.
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Now the center diamond and also the two halves the the outer cube need to be connected. Ar one of the taller end of the diamond top top the brief toothpick from among the halves. Adhesive this connection, and the four corners come their matching upward picks.Place the remaining half of the cube on top of the various other so that all the toothpicks dealing with upward space parallel. Adhesive the unattached next of the diamond to the the opposite side"s quick pick.Gather a huge amount the toothpicks, and glue every connection in between the two halves with a small dab of hot glue. Before the glue dries on each connection, location a pick, perpendicular come the upward picks to finish the center grid/section that the cube.
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Finally, include the spikes. Adhesive three solitary toothpicks at differing angles outward on each of the six vertexes of the cube. Then, develop 24 rods 2 toothpicks long, and glue four of castle on every side on the middle square that toothpicks. Lock should challenge upward and also outward. They will aid the crush framework to break the device"s fall.Done!

Blueprints


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Hand-drawn blueprint
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Side watch of the device, reflecting the spikes

The finished Device

We perfect the drop machine just in time, and class ended before we to be able to glue on all of the spikes. Nevertheless, we were able to obtain the halves joined together securelyand the inner shell attached, therefore the device was an ext or much less functional. We at first used colored toothpicks for components of the inner and outer shells, till we ran out. Us struggled a bitduring construct with getting thehot glue joints right: too small glue, and also the toothpicks won"t stick; also much and also the joint will take forever come cool, as well as not deform properly during landing.


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Top edge view
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Side view, v an extra help of blur

The autumn

All of united state were pretty downhearted about the exactly how our maker would fare on fall Day, but we were in for a surprise. As Hunter threw it turn off the balcony,we all watched with bated breath, wait for the unpreventable failure. However, as it hit the ground, i was motivated by how well the framework deformed and absorbed the impact. Can it be…

My wishes were confirmed as drew hesitantly go over and also inspected the device. The egg had survived! correct! We"d excellent it!

We were likewise successful in the second, higher, extra-credit drop, proving that our machine could take care of much an ext than we at first threw in ~ it. However, every drop left a big dent in the to like structure, and also I doubt that it might withstand many much more drops there is no repairs, particularly if it landed on the already-crushed spots. It"s definitelynot a an extremely reusable device. Luckily, it won"t need to be dropped any type of more, as having actually survived that trials, it"s currently hanging top top Mr. Corman"s ceiling.

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The machine after the first drop. The crush framework is visibly deformed.

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Drop video


This video clip shows both drops, in sluggish motion. Notification how little rebound there is, due to the fact that the deformation that the to like structure soaked up all that the kinetic energy of the fall device.