Group: Can anyone shed light on the purpose of a coiled spring 1/2" x 14" which attaches to the elevator bellcrank and to the bottom of the tail fuselage near the tiedown eyebolt? We have noted this spring being used on a 415E Ercoupe and a '57 Forney. It is not shown in either the repair manual or current Univair parts manual. It functions to place constant down pressure on the elevator causing a "nose down" orientation. Would the pilot have to overcome the pressure of this spring to maintain level flight? Could this conceivably be a modification to relieve the need for the engine to be canted down at a 3-1/2 degree angle below the nominal thrust line, in which case the aircraft would achieve hands off level flight? Any help with this apparent mystery would be appreciated. Thanks.
Bob Blanchard N94676 - 415CD
