YOU SAID:

i fly planes only when sunny but not too bright.

INTO JAPANESE

私は晴れていて明るすぎないときだけ飛行機を飛ばします。

BACK INTO ENGLISH

I only fly when it's sunny and not too bright.

INTO JAPANESE

晴れていて明るすぎないときだけ飛びます。

BACK INTO ENGLISH

It flies only when it is sunny and not too bright.

INTO JAPANESE

晴れていて明るすぎないときだけ飛びます。

BACK INTO ENGLISH

It flies only when it is sunny and not too bright.