One of Oz's more colourful aviation characters is/was Chris Braund, who has a dreadful stutter. His adventures on the radio have made it into numerous magazine columns as he flew his P51 Mustangs around.
And even in the RAAF was a stuttering hercules pilot, who was being vectored into Changi. He was asked if he could sight a Speedbird aircraft, and he replied "Nnn-n-n-n-negative." "Oh, no worries, i have him sighted " says plummy Speedbird pilot. A minute later radar again asks him if he can see Speedbird, and he replies "NNnnn-n-n-n-negative."
Speedbird says "Well, I can see you ... you must be blind."
"I'd rather be bb-b-b-blind than a ff-f-f-forking Pom!"