[mshac]

The POH gives numbers for 16k and 18k, here are the 18K numbers:

2400 RPM, 51% BHP, 25" Manifold Pressure, Standard day, yields 174 KTAS at a fuel burn of 117 PPH, or 19.5 gallons per hour.

174 KTAS/160 KTAS = 1.0875

19.5 GPH / 1.0875 = 17.93 GPH Equivalent Fuel Burn. In other words, at 50%, it would cost you about 5 GPH for the redundancy and extra capability of the Skymaster vs. The Bonanza. Plus you'll arrive a little sooner.

If you're in a hurry:

2500 RPM, 76% BHP, 33" Manifold Pressure, Standard Day, yields 202 KTAS at a fuel burn of 160 PPH, or 26.66 GPH.

202 KTAS/ 160 KTAS = 1.2625

26.66 GPH / 1.2625 = 21.12 Equivalent Fuel Burn

BTW, my previous aircraft was a V-tail Bonanza as well. The only time I miss it is when I fly solo, but most of my trips are with all seats full in the Skymaster. The comfort level for me and my passengers, especially in the back seat, is an order of magnitude superior to the Bonanza.

I attached the POH page for your consideration.