donaldsunland's blog View Details
Archive for March, 2021
Posted by donaldsunland | Mar 05, 2021 @ 04:53 PM | 7,690 Views
ZOHD DRIFT HORIZONTAL STABILIZER MODIFICATION
https://www.sciencedirect.com/topics...ring/tailplane
It is convenient in this work to measure incidence, not relative to the chord line as is normal, but to a line parallel to the flow direction which results in zero lift. This line is known as the ‘no-lift line’, and eliminates the no-lift angle from our equations even for cambered aerofoil sections.

HORIZONTAL STABILIZER MODIFICATION ADJUSTMENTS TO SURFACE
AREA, LOCATION, AND INCIDENCE ARE USED TO ACHIEVE NEUTRAL STABILITY.
I DID THIS AT THE FLYING FIELD BY TRIAL AND ERROR TO FIND THE CORRECT HORIZONTAL STABILIZER INCIDENCE, AND CORRECT THE
MODEL'S PITCH CHANGE TENDENCY BETWEEN POWER AND GLIDE.
RESULTS:
TRIM NOW REMAINS VERY CONSTANT IN DIFFERENT FLIGHT MODES. THE THROTTLE IS MORE EFFECTIVELY USED FOR CLIMB, CRUSE, AND GLIDE TO LANDING.
THE MODEL WILL NOW FLY WITH ONE TRIM SETTING.
ADDITIONALLY, AEROBATICS IS IMPROVED, AS WELL AS THERMAL
MANEUVERABILITY AND SPOT LANDING.