max speed on mission

[johnny23]

I have a phantom 4 pro, the last couple of missions my max speed slowed to 4.5 mph and I don't know why, any thoughts?

 

[MapMaker53]

Maybe upper level head wind.

 

[KachemakDiver]

4.5 mph in any direction? Any time of the day?

 

[RodPad]

@johnny23,
Welcome to the Forum!

We will help, but we need more info from you.

Is this a Litchi Mission?

As stated:
"4.5 mph in any direction?"

Rod

 

[Propsontop]

You might include whether it was a video you were shooting or a mapping mission, what was the height flown, that sort of thing.
If you were flying a mapping mission at a lower altitude, for instance, the controller software will slow the drone to minimize the motion blur.
Without the details of what you were doing it would be near impossible to say why it happened.