Replacing the MKIV yaw string - tips

On Monday, December 31, 2012 11:24:28 PM UTC-8, xcnick wrote:

This is not all tongue in cheek. You may have noticed I have no instruments for just this reason. However as you are the most innovative builder perhaps you could come up with something with positive reinforcement. I am thinking pneumatic. ;-)

xcnick,

I'm sure it can be done pneumatically, and fairly simply too. Something like two ports, one on each side of a forward facing vane, the port openings lateral to the ship's axis to avoid ram air. With no yaw, delta-p on ports is equal. With any yaw, delta-p increases.

Display could be analog, digital, or audio.

However, this yaw indicator would violate the KISS rule. More complexity for little or no gain in functionality over a yaw string.

It's also done with a slip or skid bank indicator ball, used in powe planes where prop wash precludes the use of a yaw string. http://www.aircraftspruce.com/pages/...nk_indicat.php
Though I think a yaw string is more sensitive than most ball indicators I've flown with - - plus you don't have to look at the panel to read the yaw string.

bumper