Aeromodels are broadly classified into three categories:
- Control-line models, which are controlled by lines.
- Free-flight models, which are not controlled during flight.
- Radio-controlled models, operated remotely using a transmitter.
| Class | 0 – 15 | 15 – 30 | 30 – 45 | 45 – 60 | 60 – 75 | 75 – 90 |
|---|---|---|---|---|---|---|
| Frequency | 11 | 8 | 15 | 7 | 10 | 9 |
Leaves of the sensitive plant move very quickly in response to ‘touch’. How is this stimulus of touch communicated and explain how the movement takes place?