There's a reason that nobody built any more submarines on the Hunley model, whereas the first submarine commissioned by the US Navy was the Holland VI, and the Royal Navy also commissioned Holland-class subs.
And Hunley himself only made a bigger version of the Turtle, built by David Bushnell, almost 90 years before Tunley. They were both hunan-powered, and engine technology wasn't sufficiently advanced for submarines.
Pronounce úsáid then tear. In the autonomous form of the verb the tear/tar is pronounced independently of what comes before it.
Another example is druidtear from the verb druid.