In the POH, “standard system” refers to the tip tanks. In the sim this is left and right main.
In the POH, “auxiliary” refers to the 63-gallon wing tanks. This is “external” in the sim. (I believe 64 gallons is chosen over 63 because individual tanks must be set to integers).
The optional locker tanks (behind the engine) are not simulated in the MSFS 310, instead being used for storage.
You stated the MSFS values are 102 and 64 for tip (main) and six (external) tanks, respectively.
The POH states that they are 102 and 63.
In reality, individual tanks in the sim cannot be set to decimals, only full integers. So that’s why you’re seeing an even number for total capacity (64= 32 x 2, as 63= 31.5 x 2 is not possible in the sim).
Edit to say: at the time this aircraft was developed fuel capacity was only available in integers. I believe subsequent sim updates have changed many different aspects of the way the fuel system is handled and I haven’t played with it enough to know if it now allows decimals for capacity.
Fuel tanks:
The tip tanks are the mains on ALL 310s, and were always 100 gallons regardless of their shape. Early 310s had “Tuna Tanks” - They kinda look like fish on the wingtips. Starting with the 1962 310G, they moved to the modern “Stabila-Tip” tanks. (Gotta love Cessna’s marketing jargon.)
Wing aux tanks became available in 1958, and most planes were equipped with them. They held 30 gallons from 1958-1966, then 40 gallons from 1967-1972, and for 1973 and later could be either 40 or 63 gallons. The aux tanks are directly selectable, but the overflow from the fuel divider always gets pumped back into the mains. So, you start, take off, climb, and land on the mains, and the initial part of cruise is on the mains as well: 60-90 minutes at the beginning of flight must be on the mains, 60 minutes for the 40-gallon aux tanks or 90 minutes for the 63-gallon aux tanks), to make room in the main/tip tanks. At that point, you can switch to the aux tanks, and while you do burn fuel direct from the aux tanks, the mains will re-fill from the overflow line off the fuel divider. So, once your aux tanks are empty, the mains will be full again.
It sounds like the landing is flat. 100 seems high to me for touch down. Maybe flare and hold off to settle around 85 or 90. You could also record the landing to see that the mains are touching first.
Blackbird manual suggests approach speed of 93 knots minimum with an air minimum control speed (single engine IOW) of 80 knots.
Interesting comment from the real POH, maybe it’s been said before…
Landings are simple and conventional in every respect. If power is used in landing approaches, it should be eased off cautiously near touch-down, because the “power-on” stall speed is considerably less than the “power-off” stall speed. An abrupt power reduction at five feet altitude could result in a hard landing if the airplane is near stall speed.
Landings on hard-surface runways are performed with 35 degrees flaps and 93 KIAS during the approach, using as little power as practicable. A normal flare-out is made, and power is reduced in the flare-out. The landing is made on the main wheels first, and remaining engine power is cut immediately after touchdown.
Yes I’ve had similar experiences when flying it cross country, either I’m perfectly handling this thing or its not working properly. Nevertheless, it’s outstanding