Hi Chris, My 24x24x24GPH meant I was getting 180 kts using 24″ MP & 2400 RPM, @ 24GPH fuel burn. My plane had two main tanks and two aux tanks. The main tanks on the C310 are the tip tanks, which were designed to break away in case of a crash. If your mains are close to full, you must burn those tanks first as the return from the IO520’s always goes back to the main tanks. The Bendix RSA fuel injection on my Twin Comanche does not return fuel to any tank, so I don’t need to consider that fact. The mains hold 51 gallons each. There were 20 gallon (each) or 31.5 gal (each) aux tanks available as options, as well as wing locker tanks, so a C310R might have anywhere from 102 gal to 207 gal (203 useable). My C310R didn’t have locker tanks, and I wouldn’t want them, as that locker space is very handy. I kept the engine covers, oil, and such things in those lockers. I’m trying to remember which aux tanks I had. I believe my total fuel capacity was 143 gallons. I last flew it in 1995, so it’s a while back. The most capacity would have been 166 gallons. I remember one time I flew back non-stop from Hattiesburg, MS, by myself to SW MI and had divert to Midway instead because there was ground fog all over Indiana and Michigan. I had a good tailwind. I remember the Chicago center controller asking me if it would make me low on fuel to divert to Midway, and I recall saying, no, I had plenty of fuel. I just looked up in Quicken the fuel bill at Midway for that flight & see I took on about 86 gallons so I think I must have had 143 gallon capacity. I would have had 57 gallons left in my tanks when I landed at KMDW.
Clear Skies,
Gomer
