How do you get a 'free pit stop' under the Safety Car in F1?

When the SC or VSC is called, drivers can get a pit stop "for free". What does this mean and how does this work? Let's explore! How do strategists work out which combination of tyres, pitstops and engine modes make for the fastest strategy? Let's look at the basics of putting a race strategy together. ------------------ Please do support these videos on Patreon:   / chainbearf1   Twitter:   / chainbearf1   Writing / Illustration / Animation / Editing / Narration: Stuart Taylor http://www.chainbear.me chainbearsharef1