The Study of Flying Seeds

　　　　　 Koki MIZUI Assei SANZEN

MotivationWe chose this topic because we are interested in flying things.Now, air planes fly in the sky but they consume a large amount of fuel.

The seeds of Alsomitra macrocarpa have wings and they can fly very far.They don't need their own force to move.

About Alsomitra Macrocarpa

big fruit thin feather

Experiment

We prepared some models from styrofoam.

We named them:

Ks, Ms, and As (s means styrofoam)

We dropped each model 10 times

from 2.45m high.

How to drop

Type ”a” Falling

Large ; FlyingSmall ; Falling

Type ”b” Falling

Type ”c” Falling

Type ”d” Falling

Type ”E” Flying

Type ”F” Flying

Type ”G” Flying

Type ”h” Falling

Type ” j ”Falling

Result 1c; 1%

d; 3%

E, 34%

F; 23%

G; 14%

h; 18%N; 7% a

b

c

d

E

F

G

h

j

N

Styrofoam

Large ; FlyingSmall ; Falling

Result 2

Ks 　 　

　

Ms 　 　

　

As 　 　a 0 0.0% a 0 0.0% a 0 0.0%b 0 0.0% b 0 0.0% b 0 0.0%c 5 2.0% c 0 0.0% c 0 0.0%d 10 4.0% d 0 0.0% d 0 0.0%

e 9638.4

% e 711.7

% e 1343.3

%

f 6626.4

% f 5 8.3% f 620.0

%

g 20 8.0% g 2846.7

% g 1 3.3%

h 4216.8

% h 813.3

% h 1033.3

%j 0 0.0% j 0 0.0% j 0 0.0%

n 11 4.4% n 1220.0

% n 0 0.0%　 250100% 　 60100% 　 30100%

a:Fa

lling b

:Fallin

g c:Fa

lling d

:Fallin

g

　

e:Fly

ing f:Fly

ing g

:Flyin

g h

:Fallin

gJ:Fa

lling

　

n:Fly

ing

Consideration

①We can classify these models under two types. Model K & A → Straight flying Type “e” Model M → Wave flying Type “g”

②We should consider how to keep these　models ; if they change their shape , their way of flying will change.

Hopes

① We want to find what changes the way of flying between Type” e ” and Type” g ”.

②We want to find the relationship between the biological and physical mechanisms of these seeds.

Thank you for listening.