Explaining anti-servo tab
- Thread starter gomntwins
- Start date
I always just tell my students that servo tabs "serve" the pilot by helping him or her move the large control surfaces. While the anti-servo tabs do just the opposite by making the surfaces harder to move.
(it is kind of dorky, but seems to work)
Once they understand what the function of each is, you can go into the detail of the movement of each tab through the control deflections.
-Also, don't forget fixed and balanced trim tabs.
(it is kind of dorky, but seems to work)
Once they understand what the function of each is, you can go into the detail of the movement of each tab through the control deflections.
-Also, don't forget fixed and balanced trim tabs.
Alchemy
Well-Known Member
I embarrassed myself in front of a student today while trying to explain this very topic. I explained that anti servo tabs help you move the stabilitor because they were too heavy otherwise. My student said "hey, I thought they added resistance because the stabilotor has too much of a loose feel without them". I just kind of nodded my head and said "yeah, that too" and moved onto the next part of the preflight.
Then it took us 4 tries to start the engine, thought we were going to need ground power. Then the intercomm wouldn't work so we had to use "one ear" of our headsets and shout through the cabin to communicate with one another. Ahhh, the joys of instructing in a plane I have 1.8 hrs total time in.
I asked some other CFI's after the flight and they told me the student was correct. How I got this far without knowing how anti-servo tabs work, I'm not quite sure.
Then it took us 4 tries to start the engine, thought we were going to need ground power. Then the intercomm wouldn't work so we had to use "one ear" of our headsets and shout through the cabin to communicate with one another. Ahhh, the joys of instructing in a plane I have 1.8 hrs total time in.
I asked some other CFI's after the flight and they told me the student was correct. How I got this far without knowing how anti-servo tabs work, I'm not quite sure.
MidlifeFlyer
Well-Known Member
[ QUOTE ]
I always just tell my students that servo tabs "serve" the pilot by helping him or her move the large control surfaces. While the anti-servo tabs do just the opposite by making the surfaces harder to move.
(it is kind of dorky, but seems to work)
[/ QUOTE ]I do the same as you, except I explain that in both cases, they help the pilot move the control surfaces. The servo tab helps you move them when they're aerodynamically "heavy"; the anti-servo helps you move them under control when they're aerodynamically "light".
I always just tell my students that servo tabs "serve" the pilot by helping him or her move the large control surfaces. While the anti-servo tabs do just the opposite by making the surfaces harder to move.
(it is kind of dorky, but seems to work)
[/ QUOTE ]I do the same as you, except I explain that in both cases, they help the pilot move the control surfaces. The servo tab helps you move them when they're aerodynamically "heavy"; the anti-servo helps you move them under control when they're aerodynamically "light".
[ QUOTE ]
[ QUOTE ]
I always just tell my students that servo tabs "serve" the pilot by helping him or her move the large control surfaces. While the anti-servo tabs do just the opposite by making the surfaces harder to move.
(it is kind of dorky, but seems to work)
[/ QUOTE ]I do the same as you, except I explain that in both cases, they help the pilot move the control surfaces. The servo tab helps you move them when they're aerodynamically "heavy"; the anti-servo helps you move them under control when they're aerodynamically "light".
[/ QUOTE ]
Good point.
[ QUOTE ]
I always just tell my students that servo tabs "serve" the pilot by helping him or her move the large control surfaces. While the anti-servo tabs do just the opposite by making the surfaces harder to move.
(it is kind of dorky, but seems to work)
[/ QUOTE ]I do the same as you, except I explain that in both cases, they help the pilot move the control surfaces. The servo tab helps you move them when they're aerodynamically "heavy"; the anti-servo helps you move them under control when they're aerodynamically "light".
[/ QUOTE ]
Good point.
Visceral
Well-Known Member
[ QUOTE ]
I embarrassed myself in front of a student today while trying to explain this very topic. I explained that anti servo tabs help you move the stabilitor because they were too heavy otherwise. My student said "hey, I thought they added resistance because the stabilotor has too much of a loose feel without them". I just kind of nodded my head and said "yeah, that too" and moved onto the next part of the preflight.
Then it took us 4 tries to start the engine, thought we were going to need ground power. Then the intercomm wouldn't work so we had to use "one ear" of our headsets and shout through the cabin to communicate with one another. Ahhh, the joys of instructing in a plane I have 1.8 hrs total time in.
I asked some other CFI's after the flight and they told me the student was correct. How I got this far without knowing how anti-servo tabs work, I'm not quite sure.
[/ QUOTE ]
I learn new stuff all the time. Sometimes, I wonder how I got as far as I have without knowing some of the things, but I guess thats the way it goes. Regardless, if there is a doubt on something like this, I always say "you may be right, but let me, or lets look it up later and be sure." I always go back to the student and tell them "you were absolutely right on that topic" or "you were close, but here is what I found out."
Thanks for the link to the demo too!
I embarrassed myself in front of a student today while trying to explain this very topic. I explained that anti servo tabs help you move the stabilitor because they were too heavy otherwise. My student said "hey, I thought they added resistance because the stabilotor has too much of a loose feel without them". I just kind of nodded my head and said "yeah, that too" and moved onto the next part of the preflight.
Then it took us 4 tries to start the engine, thought we were going to need ground power. Then the intercomm wouldn't work so we had to use "one ear" of our headsets and shout through the cabin to communicate with one another. Ahhh, the joys of instructing in a plane I have 1.8 hrs total time in.
I asked some other CFI's after the flight and they told me the student was correct. How I got this far without knowing how anti-servo tabs work, I'm not quite sure.
[/ QUOTE ]
I learn new stuff all the time. Sometimes, I wonder how I got as far as I have without knowing some of the things, but I guess thats the way it goes. Regardless, if there is a doubt on something like this, I always say "you may be right, but let me, or lets look it up later and be sure." I always go back to the student and tell them "you were absolutely right on that topic" or "you were close, but here is what I found out."
Thanks for the link to the demo too!