wrote:

: That's a PA-28-180 vs. a PA-28-180R. Cruise of 119 kts vs. 141 kts. That's
: 18% improvement in speed. Others are similar around 15%. So, multiply your fuel

Having flown many hours in both, the Arrow numbers are a bit high. Figure
135 kts for the Arrow, and you get ~15% like the others. The 200 HP Arrow
is quite a bit faster.
--
Aaron C.