dell30rb
Final Approach
The useful load in my 1977 Cardinal RG is 1000.2 lbs. The CoG can be a bit tricky if you put two heavyweights in the front seats. You'll need some weight in the baggage compartment to balance that out. My plane has both a lighter weight starter and alternator, and after last year's annual the inop ADF and ADF antenna hardware is gone (anyone want it? It's still in my basement!).
I usually cruise at 2400 RPM, 23-24" or WOT. This is around 10 GPH. The stock fuel flow gauge is not super accurate (it's actually a pressure gauge calibrated in GPH). A future upgrade will be a proper fuel flow and totalizer so maybe some day I'll have a better idea of the fuel flow for various power settings. Block fuel consumption vs. hobbs is around 8.5-9 GPH since I bought the plane.
My favorite cruise settings is 2400 RPM, WOT, at or above 7 or 8 thousand feet, ROP or even peak if manifold pressure is sufficiently low to make for 65% power. For some reason my plane doesn't seem to run smoothly very far LOP. I routinely get 140 knot true air speeds at that altitude and power setting.
I would definitely hesitate to take a Cardinal RG off of a short strip fully loaded in the summer but being even 100-200 pounds under gross makes a pretty big difference. Like all long-legged airplanes you have considerable flexibility in the fuel planning.
Those numbers are about what I figured for a cardinal. Pretty good!
Given the purchase price delta and the high wing configuration with two big doors, I would probably choose a cardinal RG over a mooney M20J. The time difference on my usual trip is maybe 20 minutes.
However I do consider 140kts to be about the minimum speed I could tolerate if I was spending that much on an airplane.