Rotor Egg Drop B

[hogger]

What do you mean? How do you fit a 70x70 device flat into a 51x51 square? 70x70 device is illegal if it does not fly tilted, that is why Cade said it was against the rule.

http://www.soinc.org/node/247

02/21/2013 - 22:19 Can the device be put in diagonal direction of the 51x51x51 cube?

No, the device must be in launch flying configuration and fit within the 51 x 51 x 51 cube with one face of the cube on the floor.

[jander14indoor]

As usual, opinion only.

A two bladed rotor could be in flight position with the blades along the diagonal of a 51 by 51 top SQUARE (not cube) of the cube. This would allow up to 72 cm tip to tip. A four bladed rotor could do the same as long as the blades are at 90 degrees.

Interestingly, check my trig, but a 3-bladed rotor with diameter 72 cm will NOT fit in the 51 by 51 box.

So you can have a rotor system with a DIAMETER of 70 cm. Of course some of this depends on your tip shape to fit into the corner to get 72 cm.

What I believe the FAQ wants to get away from is fitting the device along the diagonal of the 51 by 51 by 15 CUBE that is 88 cm long.

And in all the construction events, when a max size is given, of course the device has to fit without bending!

Now if the ES had meant the flying position to mean while the rotor is spinning, then they should have just specified a 51 cm diameter for the rotor, they should have just said so!!!

Jeff Anderson
Livonia, MI

[hogger]

I agree, 70 cm tip to tip is alright, but a non-tilting device that spans 70x70 cm square is not ok. From my experience, you tend to want maximum wing surface, so I think most people build it close to the maximum 70 cm tip to tip anyway.

[Beastybob12345]

Heh, mine barely fit inside the 51*51 square, but luckily the judges said it was ok and I got first.

[sofan]

I am redoing my rotor (even though I got 3rd at regionals) and want ideas of what rotor design i should use. I tried a flower petal that weighed 8 grams:2.6 sec. Same time with my double rectangular rotor. I want to try the corkscrew,but last time I tried i was completely clueless on how to build it. Any ideas on a rotor that has a time of more than 3 sec.? That is my goal.
Thanks

[ckssv07]

I am redoing my rotor (even though I got 3rd at regionals) and want ideas of what rotor design i should use. I tried a flower petal that weighed 8 grams:2.6 sec. Same time with my double rectangular rotor. I want to try the corkscrew,but last time I tried i was completely clueless on how to build it. Any ideas on a rotor that has a time of more than 3 sec.? That is my goal.
Thanks

Off of what height do you want to get three seconds off of
It does not have to be uber light, most times the mass added by surface area is cancelled out and then some by the added drag and air resistance

[mwloveslm]

I am redoing my rotor (even though I got 3rd at regionals) and want ideas of what rotor design i should use. I tried a flower petal that weighed 8 grams:2.6 sec. Same time with my double rectangular rotor. I want to try the corkscrew,but last time I tried i was completely clueless on how to build it. Any ideas on a rotor that has a time of more than 3 sec.? That is my goal.
Thanks

Try to maximize your area, so that the blades create more air drag. Try to use shapes that utilize the 51 cm by 51 cm cube. I tried this and I got first at State!

[ckssv07]

Does anyone know what the wsu drop height was?

[sofan]

I am redoing my rotor (even though I got 3rd at regionals) and want ideas of what rotor design i should use. I tried a flower petal that weighed 8 grams:2.6 sec. Same time with my double rectangular rotor. I want to try the corkscrew,but last time I tried i was completely clueless on how to build it. Any ideas on a rotor that has a time of more than 3 sec.? That is my goal.
Thanks

Try to maximize your area, so that the blades create more air drag. Try to use shapes that utilize the 51 cm by 51 cm cube. I tried this and I got first at State!

I am redoing my rotor (even though I got 3rd at regionals) and want ideas of what rotor design i should use. I tried a flower petal that weighed 8 grams:2.6 sec. Same time with my double rectangular rotor. I want to try the corkscrew,but last time I tried i was completely clueless on how to build it. Any ideas on a rotor that has a time of more than 3 sec.? That is my goal.
Thanks

Off of what height do you want to get three seconds off of
It does not have to be uber light, most times the mass added by surface area is cancelled out and then some by the added drag and air resistance

height:5m
I tried what mwloveslm did at regionals.Didn't work so well.Nee another starting point for my new one.

[sofan]

I am redoing my rotor (even though I got 3rd at regionals) and want ideas of what rotor design i should use. I tried a flower petal that weighed 8 grams:2.6 sec. Same time with my double rectangular rotor. I want to try the corkscrew,but last time I tried i was completely clueless on how to build it. Any ideas on a rotor that has a time of more than 3 sec.? That is my goal.
Thanks

Try to maximize your area, so that the blades create more air drag. Try to use shapes that utilize the 51 cm by 51 cm cube. I tried this and I got first at State!

I am redoing my rotor (even though I got 3rd at regionals) and want ideas of what rotor design i should use. I tried a flower petal that weighed 8 grams:2.6 sec. Same time with my double rectangular rotor. I want to try the corkscrew,but last time I tried i was completely clueless on how to build it. Any ideas on a rotor that has a time of more than 3 sec.? That is my goal.
Thanks

Off of what height do you want to get three seconds off of
It does not have to be uber light, most times the mass added by surface area is cancelled out and then some by the added drag and air resistance

height:5m
I tried what mwloveslm did at regionals.Didn't work so well.Need another starting point for my new one.