Ukrainian F-16 fighter pilots have had to dramatically change the way they fly after long flying Soviet jets, and it's a lot to overcome

"Ukrainian pilots were given roughly nine months of training in the US and some European countries, while most Western pilots are given three years to learn the jets."

"What it means is that F-16s are not just more maneuverable, they're more responsive. Transitioning pilots from the older to the newer is a problem because you can teach someone to fly in six months, but muscle memory takes four or five years to develop."

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