Пилот предупредил, что взлёт задержится на десять минут из-за сильного ветра.

In Russian, a subordinate clause introduced by что normally takes a comma before it.

So in:

Пилот предупредил, что взлёт задержится...

the main clause is Пилот предупредил and the subordinate clause is что взлёт задержится на десять минут из-за сильного ветра.

This is very standard Russian punctuation.

Literally, предупредить often means to warn or to give advance notice.

In this sentence, предупредил is closer to:

• warned
• informed in advance
• gave notice

So the tone depends on context. A pilot saying this could be translated naturally as:

• The pilot announced that...
• The pilot warned that...
• The pilot informed passengers that...

Russian предупредить often covers both warning and letting someone know ahead of time.

Because it agrees with пилот, which is a masculine singular noun.

Russian past tense verbs change for gender and number:

• предупредил = masculine singular
• предупредила = feminine singular
• предупредило = neuter singular
• предупредили = plural

Since пилот is masculine, you get пилот предупредил.

Because взлёт is the subject of задержится.

Structure:

• взлёт = the takeoff
• задержится = will be delayed / will get delayed

So взлёт is the thing that will be delayed, and subjects normally appear in the nominative.

The verb is задержаться, which is a reflexive verb built from задержать / задерживать.

Here задержится means something like:

• will be delayed
• will get delayed

This is a very common Russian way to express something happening to the subject without naming an external agent directly.

Compare:

• Мы задержали рейс. = We delayed the flight.
• Рейс задержался. = The flight was delayed / got delayed.

So -ся here does not mean a literal reflexive like himself. It helps form an intransitive/passive-like meaning.

Because Russian often prefers a simpler, more natural verb construction where English might use a passive.

So:

• взлёт задержится = the takeoff will be delayed
• взлёт будет задержан = the takeoff will be delayed too, but more formal or more explicitly passive

In everyday announcements, задержится sounds very natural.

Because the delay is in the future from the moment of speaking.

The pilot is saying now that the takeoff will be delayed.

Also, задержится is the simple future of the perfective verb задержаться.

Russian forms future in two main ways:

• imperfective: будет задерживаться
• perfective: задержится

Here the perfective is natural because it refers to the resulting event: the takeoff will end up being delayed by ten minutes.

На десять минут means by ten minutes or for ten minutes in this context.

This is a very common Russian pattern:

• опоздать на пять минут = to be five minutes late
• задержаться на час = to be delayed by an hour
• перенести на завтра = to move to tomorrow (different meaning, but still на)

Here десять минут is in the accusative, but with this numeral phrase it looks the same as the nominative:

• десять минут

So на десять минут expresses the amount of the delay.

Because на десять минут and через десять минут mean different things.

• на десять минут = by ten minutes / for ten minutes
  → length or amount of delay
• через десять минут = in ten minutes
  → when something will happen

So:

• Взлёт задержится на десять минут. = Takeoff will be delayed by ten minutes.
• Взлёт будет через десять минут. = Takeoff will be in ten minutes.

That distinction is very important.

Из-за takes the genitive case.

So:

• ветер = nominative
• ветра = genitive singular

And the adjective must agree:

• сильный ветер = nominative
• сильного ветра = genitive

So из-за сильного ветра means because of the strong wind.

They are different prepositions.

• из = from, out of
• из-за = because of or literally from behind

In this sentence, из-за means because of:

• из-за сильного ветра = because of strong wind

So you cannot replace it with из here.

Because it refers to wind as a general weather condition, treated as an uncountable or mass noun.

Russian often says:

• из-за ветра = because of the wind
• из-за сильного ветра = because of strong wind

Using the singular is the normal choice here.

Because the word is pronounced vzlyot, not vzlet.

The correct spelling is взлёт. In many Russian texts, ё is often written as е, so you may also see взлет, but the intended pronunciation is still with ё.

So:

• spelling with full marking: взлёт
• often seen in ordinary text: взлет

Both refer to the same word, but взлёт is the clearer spelling.

Both main verbs here are perfective:

• предупредил ← предупредить
• задержится ← задержаться

Why this matters:

• предупредил presents the warning/announcement as a completed act.
• задержится presents the delay as a resulting event that will occur.

If you used imperfective forms, the meaning would shift. For example:

• предупреждал could suggest repeated warning, ongoing warning, or background action.
• будет задерживаться would sound more process-focused and less natural here.

Perfective is the normal choice for this sentence.

The basic word order here is very natural, but Russian word order is more flexible than English.

Original:

Пилот предупредил, что взлёт задержится на десять минут из-за сильного ветра.

Possible variation:

Из-за сильного ветра взлёт задержится на десять минут, предупредил пилот.

This is still grammatical, but it changes the emphasis and style. The original version is the most straightforward and neutral.

Yes. Предупредить can take different constructions.

For example:

• предупредить кого-то о чём-то = to warn someone about something
• предупредить, что... = to warn/inform that...
• предупредить кого-то, чтобы... = to warn someone so that... / to tell someone to be careful to...

In this sentence, что introduces the content of what the pilot said, so предупредил, что... is exactly right.