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At 08:53 PM 5/11/04 -0400, Allen W Rothenberg wrote:
>In the
>first series of touch and gos there was a vibration, sort of like a
shudder
>in the fuselage. It did not seem to be in the controls, or to effect the
>controls. I was doing about 80 IAS, engine at idle, top open, slight
>descent on approach when it happened.
I'd wonder about the "top open," Allen. It is well known that an Ercoupe
flies with more lift when the top is a) closed if two-window system, or
b) has the center piece centered on a three-window system. Reason
is smooth air flow over the fuselage, which is acting as a lifting body.
Try it with the top up before you go any farther/spend more money.
Percy
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