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Originally Posted by kevmor99  How much preflight planning do you guys do for the Seminole? I'm used to a 172, and with all these charts, it literally took me hours to calculate every single chart (time/distance/fuel to climb, time/distance/fuel to descend, single engine service ceiling, rate of climb gear up/down, etc).
For this particular flight, it's only 50nm. Since I know I won't be needing any short field techniques, I can skip those and just use the normal takeoff/landing ground rolls, but do I really need to calculate the time/distance/fuel for climbs/descents (we'll be at about 4,000-5,000)? In the 172 because it didn't have these for climbs/desc. I would put a slower speed for the first few miles of the leg on the flight log to account for the climb. Doing it this chart way, I subtract the distance between my first waypoint and put that as an entry in the flight log with the climb speed used.
(Also, the climb in the book is at 2700 RPM/full throttle, so my CFI told me to estimate with 25-50% of that for a 2500 RPM/25") |
Calculate using the short field T/O's and Landing charts, no need to calculate the "normal" takeoff/landing rolls, and just because you calculated it that way dont mean you have to do a Short field takeoff if you got plenty of runway.
You would probaly get a better Fuel and time econamy if you climb at around 100 KTS 25/25, vs the 88kts-full/2700
A good rule of thumb: You will either lose 5 knots, or 100 FPM for every inch of MP that is reduced. so every thousand feet you go up, you will lose around 5 knots, until you get to blueline, then you will lose roughly 100 FPM per thousand.