hecilopter
Well Known Member
Still trying to figure out differences in 2 RV-7A's. Cooling problems are now under control, now to a speed issue. One plane is about 10 mph slower than the other. I have several other threads about our 2 planes, but for all practical purposes, they are identically cowled, baffled, engined, propped, faired and equipped except for the louvres on the bottom of the cowl and removing about 4" from the bottom of the cowl where the exhaust exits due to cooling issues.
Has anyone noticed or experimented with the exhaust pipes and the angle with which they exit the cowl? I noticed that one difference between our airplanes (both equipped with vetterman exhaust) is that my pipes exit the cowl and are parallel to the center of the plane. The pipes on the slower plane are angled pointing to the center of the plane and at each other.
Could this make a difference with drag from the angled pipes or maybe exhaust thrust that is not aimed inline with the airflow? We are going to experiment and twist the pipes to be parallel like mine and see what happens. Just wanted to check to see if anyone else has done this and what the results were.
Thanks!
Has anyone noticed or experimented with the exhaust pipes and the angle with which they exit the cowl? I noticed that one difference between our airplanes (both equipped with vetterman exhaust) is that my pipes exit the cowl and are parallel to the center of the plane. The pipes on the slower plane are angled pointing to the center of the plane and at each other.
Could this make a difference with drag from the angled pipes or maybe exhaust thrust that is not aimed inline with the airflow? We are going to experiment and twist the pipes to be parallel like mine and see what happens. Just wanted to check to see if anyone else has done this and what the results were.
Thanks!