I am filling out the aircraft checkout form, and for some of the questions, I have to do the typical interpolation, but two are especially difficult. The first question asks to estimate endurance at a specific altitude and temperature. There are no range charts or tables in the PIM, however, and I've had to calculate the answer from NMPG information in the cruise section. There is also no information on time to climb and fuel burn. The other question is about required distance for takeoff over a 50 foot obstacle. This is a bit better, because information is given for some of the given conditions (but not the temperature--not even close). I just did some math here, but having a table would help. Does anyone know if there is any other information anywhere for these questions? Anything like range tables or charts?