I see this grammar mistake in many A2A documents, and I hate to do that but I'll explain it here in the hope it's useful, because it really hurts the eye
Random quote: "
For example, when static and on the ground, lets say you move your prop lever to it's highest speed, which is 3,000RPM on the Spitfire."
No! "
it's" is a contraction of "
it is" and nothing else, you don't mean "
You move your prop lever to it is highest speed", do you? In this occurrence, this should be the determiner "
its".
And so the correct sentence is: "
For example, when static and on the ground, let's say you move your prop lever to its highest speed, which is 3,000RPM on the Spitfire." (also, it is "
let's" and not "
lets", for "
let us").
The trick is to replace "
its/it's" with
- "
it is": if that works, then it can be written "
it's"
- "
his/her": if that works, then it can be written "
its" (to be used for a non-person genetive only!).
There, hope it helps
