I want to clarify my previous remarks. Although a challenge to a degree, I never regretted the effort going with the then standard Hoerner wing tips. In fact it may have been one of the choices that gave my first Model IV one of its characterics – it was very fuel efficient. In our annual flight of six excursions to Idaho in the early 2000’s I always bought less fuel than the rest of the fleet. On the first trip at our fuel stop after the first 3 hour leg, I loaded under 8 gallons of fuel. Next was about 10 gal. and the highest, a Rans S-6 at a bit over 13 gallons. It should be noted that the group included a Model IV with a 582 and group speeds were typically under 90 mph.

The following link will tell the story of the development of the Hoerner wing tip and possibly explain its introduction in the early 90s to replace the original droop tips as the standard factory wing tip.

http://buyplaneparts.com/the-hoerner...-design-story/