Rotor Egg Drop B

[Beastybob12345]

I made a really light, durable device that is made of bamboo skewers. It's really good...

[Beastybob12345]

Hrm, are we allowed to spin the rotor before dropping it?
RIVENOPMANNN

I don't think this forum's for rule clarifications...

[vashucpa]

i have blades made but we are really struggling as to how to attach them together to create the rotor? i would like it to spin independent of the central axis but not sure how to do it or what materials to use.

[jander14indoor]

Attaching blades to make a rotor. For more detail, look at the helicopter string from this year and the past two years.

For a two bladed rotor, attach the blades at opposite angles to a central spar of balsa wood, say 3/32 square, exact size as needed to support egg) to get spin (described better above). At the very center drill a small hole to allow a .020 thick piece of music wire through. Attach the wire to a short stick, add a bearing, slide wire through spar from the bottom, add another bearing (small glass beads, washers, etc will work as bearings) and bend the wire over 90 degrees.

For a four bladed rotor, make that spar into a cross, otherwise the same.

Counter rotating systems similar except need another piece of wire, need to separate the rotors. Again, described back up this string.

Attach egg holding system to bottom stick. Make your solution simple, secure, LIGHT.

Jeff Anderson
Livonia, MI

[vashucpa]

Have been trying lots of different things but I just cannot make this work. Really unclear on how to attach blades together to make a rotor. Also not sure if my blades r correct. I have made out of balsa wood the blades but is that heavier then making a frame of balsa and using tissue paper for the wing cover. And again how do I attach it together to make a rotating rotor. Really confused and fustrated at this point.

[EthanBrown]

Hey, what are some good times for Rotor Egg? Our rig got 2.14 seconds.
We made blades out of Carbon Fiber and Mylar. We hung the top of a cup from a string, and put the provided cup inside of it.

We attached the wings we made with string and super glue, and we had a piece of brass tubing that went between the two sets of two wings/rotors.

[ckssv07]

What height was the drop from?

[EthanBrown]

15ish feet

[victorialam]

Concerning the event, essentially, what is the best way to connect the rotors to the cup? And what are the best rotors to make so that it will stay up in the air longer?

[EthanBrown]

Fiber glass as the "Supports" then wrap Mylar around it, secured with spray-on glue. Connect two rotors (Pick your pitch) with string and super glue. Put a rod through those two, and on the bottom of that rod (I used brass) Put another pair of two. Then hang two strings and tie them to either side of the top portion of a cup. You can then slide the cup they give you into the top of the cup