wit as ik Ree Vertioal Ailiads Bjetane (tine.sconere = Teloulhy w * — 20987 equale Minutes par Rour divided by Pest per Bautical Mile. Exegpt for the 55,000 foot level, the above tines were evtained by talking the difference between the time required to reach the altitudd 5,000 fest above the altitude in question and the tise required to reach the altitude 5,000 fest below. for the 55,000 foot level Ube difference in tines for the 56,000 and the 54,000 foot levels were woud. The vertical distance le 2,000 fast inetasd af 10,000 feat og in the ance of the other levels, -23- 32 O50 & Ob om na ad a et NOW OD Bh AP OO a BREE Bwesmurune 5 x j 5 settee eg 10,000 15,000 20, 25,069 3,000 33,000