The statement "I was very happy to go behind the strange aeroplane like an obedient child" implies a feeling of excitement and enthusiasm towards a new experience or adventure. The speaker is comparing themselves to an obedient child, indicating a willingness to follow instructions and be cooperative.

Possible explanations for the statement include:

Curiosity and excitement
The speaker may be intrigued by the prospect of seeing a strange aeroplane up close, especially if it is a rare or unusual model. This excitement can be fueled by a sense of adventure and the desire to explore and discover new things.

Trust and obedience
The speaker may also have a sense of trust and respect for the person or organization leading the activity involving the aeroplane. This trust can create a sense of comfort and security, allowing the speaker to follow instructions without hesitation.

Childlike wonder and playfulness
The comparison to an obedient child may also suggest a sense of playfulness and childlike wonder. The speaker may be embracing the joy and freedom of exploring a new environment and experiencing new sensations.

Overall, the statement conveys a sense of positive anticipation and willingness to participate in a new and exciting experience.