Foward slips to landing
03-07-2007, 01:04 AM
#21
Moderator
Joined APC: May 2006
Position: ATP, CFI etc.
Posts: 6,056
Well I don't think I was imagining 40 degree setting in the 172N that I took my instrument checkride in.
Here's something I surfed up:
"...not until the 1981 model year was the maximum flap extension reduced from 40 to 30 degrees."
http://search.netscape.com/ns/boomfr...2FA02P0136.asp
C172Ps were the last of the 1980's Skyhawks, and were introduced in 1981 according to wikipedia. So, my guess is that was where the 40 setting actually ended, when the P was introduced. I never found much use for the 40 degree setting as it slowed down touch n goes due to retraction time. I think they were for super-short field landings which no one does anymore, perhaps a sales gimmick. As far as I know they only only added drag which is of little value when forward slipping because that does it so much better.
Here's something I surfed up:
"...not until the 1981 model year was the maximum flap extension reduced from 40 to 30 degrees."
http://search.netscape.com/ns/boomfr...2FA02P0136.asp
C172Ps were the last of the 1980's Skyhawks, and were introduced in 1981 according to wikipedia. So, my guess is that was where the 40 setting actually ended, when the P was introduced. I never found much use for the 40 degree setting as it slowed down touch n goes due to retraction time. I think they were for super-short field landings which no one does anymore, perhaps a sales gimmick. As far as I know they only only added drag which is of little value when forward slipping because that does it so much better.
Last edited by Cubdriver; 03-07-2007 at 07:09 AM.
03-07-2007, 09:25 AM
#22
Prime Minister/Moderator
Joined APC: Jan 2006
Position: Engines Turn Or People Swim
Posts: 39,227
Originally Posted by VTcharter
in did. As for the tail stall being an old wives tale...turbulent airflow over an airfoil is the beginnings of a stall, and with a slow enough airspeed, or sudden change in relative wind, it would be very easy for a tail stall to develop.
Last edited by rickair7777; 03-07-2007 at 12:28 PM.
03-07-2007, 02:54 PM
#24
Flying Farmer
Joined APC: Jul 2006
Position: Turbo-props' and John Deere's
Posts: 3,160
Originally Posted by de727ups
I looked up the TCDS for the 172N. I had a seaplane, so that's where I got the 30 degrees of flaps, from. The landplane did have 40 degrees. The P models and newer had 30 degrees.
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