Gary,

Last year I did an out and almost return Diamond Goal attempt in the
Cherokee. The write up for that one is on my Cherokee II blog as well
as Soaring Cafe. Total distance on that one was a touch over 300 km
but i ended up landing 4 miles short of the starting airport at 7:30
PM. That one was a 6.5 hr flight, about the same as Sunday.
http://www.onlinecontest.org/olc-2.0...tId=1688698192

I also did a 300 km straight out flight last year for Gold Distance
http://www.onlinecontest.org/olc-2.0...tId=1618688367

Interestingly the speed I made in the Cherokee on the out and return
was about the same as I made in the NG-1 on Sunday. I bet if I was in
a Nimbus I could still average 30 mph!