*TM 1-320  AIRSHIP AERODYNAMICS  TECHNICAL MANUAL }  No. 1-820  WAR DEPARTMENT,  W  ASHlNGTON,  Pebr•um •y 11, 1941.  Prepared under direction of  Chief of the Air Corps  SroriON  I. General.  Paragraph  ll. Resistance.  III. P ower requirements.  *Thia manual supersedes or:a ll’lG-290, November 16, 1929.  285746°--41  1  IV. Stability.  Variation of pressure distribution on airship  hull------------------------------------- 22  Specific stability and center of gravity of air- shiP---------------------------------- --- 23  Center of buoyancy________________________  24  Description of major axis of airship__________  25  Types of stability___________________ _______  26  Forces and moments acting on airship________  9/l  Damping moment-------------------------- 28  Longitudinal stabilitY---------------------- 29  Directional stability________________________  30  Lateral stability-------------------------- -- 31  SummarY---------------- ------------------ 32  Power required to overcome airship resistance_  17  Results of various speed trials_______________  18  Burgess formula for horsepower------------- 19  Speed developed by given horsepower________  20  Summary-----------------------""’---------- - 21  Fluid resi&ance___________ ________ _________  7  Shape coefficients_______ ____________________  8  Coefficient of skin friction___________________  9  Resistance of streamlined body-------------- 10  Prismatic coefficient------------------------ 11  Index of form efficiency_______ _____________  12  lllustrative resistance problem_______________  13  Scale effect--------------------------- - ---- 14  Resistance of completely rigged airship______  15  Deceleration test --------- ------ ------------ 16  Definition of aerodynamics__________________  1  Purpose and scope________ _____ __ ______ _____  2  Importance ---- ---------------------------- 3  Glossary of terms____ _____ _____________ ____  4  Types of airships----------- ---------------- 5  Aerodynamic forces_______________ __________  6 