Originally Posted by the Wasp

this is funny, just the other day i was thinking about those old whistles we had when I was a kid, they are about 3/4" in diameter and they have a fan inside, they sound like an engine revving, other whistles like them sound like an old cop cars,, I was wondering where I can buy one and if a plane would go fast enough to make them work

I will try to find them on-line

Jim