how do dragons fly? (Spoilers all books to end DH)

[assasin]

Nobody has disproven your theory

Of course not, I've just given up coninving people that it is the correct one. [though not saying its right. Just that I believe it is]

Now that I think of it, do dragons require a powerful leap or running start before gaining enough speed and lift to fly? Or can they somehow lift off by only flapping their wings and some sort of magical aid?

Sintra stated [when talking about heebies practice] that dragons don't have to run before they fly. Though she did do it at the end of haven. I would assume that all they have to do it flap their wings and possibly jump into the air.