TM 55-1510-221-10 prevent turning (crabbing) into the wind. Rotate in a  positive  manner  to  keep  from  side-skipping  as weight  is  lifted  from  the  shock  struts.  To  prevent damage to the landing gear, in the event that the air- craft were to settle back onto the runway, remain in “slipping” flight until well clear of the ground, then crab into the wind to continue a straight flight path. c. Minimum Run Takeoff. Spectacular  takeoff  performance  can  be obtained  by  lifting  off  at  speeds  below those  recommended  in  Chapter  7.  How- ever, control of the aircraft will be lost if an engine failure occurs immediately fol- lowing  liftoff  until  a  safe  speed  can  be attained. Except during soft field takeoff, liftoff   below   recommended   speeds   will not be performed. Minimum run takeoffs are performed with flaps extended to 40% although at some conditions, use of flaps  during  takeoff  may  result  in  the  inability  to attain positive single-engine climb if an engine fails immediately  after  liftoff. To   compensate   for   torque   effect   during   the beginning of the takeoff roll, align the aircraft with the  nose  approximately  10°  right  of  centerline.  After LINE  UP  procedures  have  been  completed,  hold brakes firmly and apply TAKEOFF POWER, allow- ing  for  some  increase  in  power  as  airspeed  increases during the takeoff roll. Copilot action is the same as for  normal  takeoff.  Release  brakes  and  maintain directional control and nosewheel steering and rud- der. Do not use brakes unless absolutely necessary. Hold the elevators in a neutral position, maintaining wings level with ailerons. Allow the aircraft to roll with its full weight on the wheels until the recom- mended  rotation  speed  (V,)  is  reached.  At  this  speed rotate smoothly and firmly at a rate that will allow liftoff  at  liftoff  air  speed  (V1of).  When  flight  is assured, retract the landing gear. d.  Obstacle  Clearance  Climb.  Follow  proce- dures as outlined for a minimum run takeoff, to the point  of  actual  liftoff.  When  flight  is  assured,  retract the landing gear and establish a wings level climb attitude, maintaining the computed obstacle clear- ance airspeed (V,). Climb at this speed until clear of the obstacle. After the obstacle is cleared, lower the nose slowly and accelerate to best rate-of-climb air- speed  (V).  Retract  flaps  after  attaining  single  engine best rate-of-climb airspeed (V _yse). 8-18 NOTE The best angle-of-climb speed (V,) is very close  to  single  engine  power-off  stall speed. To provide for a margin of safety in  the  event  of  engine  failure  immediately after  takeoff,  the  obstacle  clearance  air- speed value is used in lieu of true Vx, for maximum  angle  takeoff  climbs.  Takeoff performance data shown in Chapter 7 is based  on  the  use  of  obstacle  clearance climb speed. e.  Soft  Field  Takeoff.  If  a  takeoff  must  be made in conditions of mud, snow, tall grass, rough surface or other conditions of high surface friction, the following procedure should be used. Set flaps at TAKEOFF (40%), align the aircraft with the runway, and  with  the  yoke  held  firmly  aft,  begin  a  slow steady  acceleration,    avoiding   rapid   or   transient accelerations. Continue to hold full aft yoke so as to transfer the weight of the aircraft from the wheels to the  wings  as  soon  as  possible.  When  the  aircraft rotates, control pitch attitude (nose) so as to lift off from the soft surface at the slowest possible speed. When  airborne,  level  off  immediately  in  ground effect just above the surface, and accelerate to nor- mal lift-off airspeed (V1of) before rotating to climb attitude and retracting the landing gear. Consider the  effects  of  snow  or  mud  on  gear  retraction  as applicable. 8-42. AFTER TAKEOFF. Immediately after takeoff, the pilot flying the  aircraft  should  avoid  adjusting  con- trols  located  on  the  aft  portion  of  the extended  pedestal  to  preclude  inducing spatial disorientation due to Coriolis illu- sion. After the aircraft is positively airborne and flight is assured, retract the landing gear. Adjust pitch atti- tude as required to maintain best rate-of-climb air- speed (V,). Retract flaps after attaining best single- engine  rate-of-climb  airspeed  (V,,).  The  copilot should continue to maintain power at the computed setting  and  to  monitor  instruments.  At  single-engine maneuvering  altitude,  adjust  pitch  attitude  to  obtain cruise  climb  airspeed.  As  cruise  climb  airspeed,  is attained, adjust power to the climb power setting. The copilot then activates the yaw damp and checks that the cabin is pressurizing. Both pilots check the wings and nacelles for fuel or oil leaks. The proce- dural steps after takeoff are as follows: