[z303]

The SR-71 used something similar to go supersonic,

'After take off and the top up the Blackbird will perform a manoeuvre called the Dipsy Doodle, here it passes mach 1 by a climb to 33,000ft followed by a sharp dive to allow the aircraft to traverse high drag transonic range without using a lot of fuel. The aircraft will then climb to at least 60,000 ft.'

http://www.historyofwar.org/articles/weapons_blackbird.html