danweseman
Active Member
Hi Guys. I now have 5 flights on the -4 (see second first flight from last week) flown By myself and two other more experienced RV -4 Flyers. Both felt the elevator force is very heavy. It has no substantail static drag in the system and is balanced Per Van manuel. In cruise the elevator balance arm front tips were 3/4ths inch above H stab. It could trim all the way into stall with flaps but ran out of trim at 175 or so. it had no shim under the front H stab mount so I added a .0125 shim under the front mount and flew it again today. the forces seemed a little lighter(maybe?) ,and i could trim to over 200. I could also trim to under 70 mph easily on the bottom end with full flaps. the arms are now approx 1/2 inch above the H stab at 2700 rpm which was 189 or so indicated at 500ft. I was thinking of adding another shim to get the arms and trim tab aligned in cruise. the cg for all flights was 71.14 ,pretty far foward. Any thoughts on the heavy elevator and also on the balence arms position would be help full. Also any info on speeds/rpms from others with 0-360 and 85 inch pitch sensnich prop would help. Thanks Dan Weseman