How do you train your voice to whislte like a train i have only seen a few people that can do this is this something i can learn or is it something that not many can do?

How do you train your voice to whislte like a train i have only seen a few people that can do this is this something i can learn or is it something that not many can do?
All it takes is simple time and practice and eventually you'll get better. Most people can't whistle until their about at the age of 20-25 keep trying and practicing you never know