Originally Posted by FlyingForFun
Would the test pilot have used full flap in demonstrating the 25kt crosswind in the BE76?
That's a good question
FlyingForFun!
I had never thought of this, so I went looking to see if the FARs for certification of part 23 airplanes gave any hint. The only reference I found regarding max demonstrated crosswind capability is quoted below. This is from a section regarding operational information which must be included in the AFM. No mention I could find in the certification flight test guide either.
Originally Posted by FAR part 23
§ 23.1585 Operating procedures.
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(a) For all airplanes, information concerning normal, abnormal (if applicable), and emergency procedures and other pertinent information necessary for safe operation and the achievement of the scheduled performance must be furnished, including—
(1) An explanation of significant or unusual flight or ground handling characteristics;
(2) The maximum demonstrated values of crosswind for takeoff and landing, and procedures and information pertinent to operations in crosswinds;
Drats! No clue as to whether any particular flap configuration is required when determining the max demonstrated crosswind. But since
procedures and information pertinent to operations in crosswinds is required,it seems prudent to presume that it was determined using whatever procedures and techniques are recommended in the POH or AFM for crosswind ops.
I would be inclined to believe that your difficulty with the crosswind landing was, at least in part, attributable to the effect of having the rudder trimmed into the operating engine. This effect is excacerbated if the operating engine is on the upwind side. When you reduce the throttle, it's like stepping on upwind rudder. Not what you needed! You'll be better prepared now that you have experienced it and discussed it. Next time, you'll anticipate this effect and allow for it.
Much success to you in your training.
Best regards,
Westhawk