The Salt Lake Two Departure Procedure departing KSLC with runways 35 and 17 is the classic radar vector departure to assigned route or fix. Take-off minimums must be met while flying this approach. The DP states that for runway 17: minimum climb of 260’ per NM to 6000, and runway 35: minimum climb of 260’ per NM to 7800.
After dusting off a few books on the instrument shelves I was able to find the formula [(Ground Speed/60) x climb gradient=FPM] to help us determine if our aircraft is capable of performing such a DP.
First starting with determining our GS in the Seminole. Vy at climb out is 88 IKAS. Taking into the current conditions at KSLC with KSLC 161553Z 16008KT 10SM FEW200 21/02 A3011. Determining the pressure altitude to be 4417’ (4427+190), taking the current temp of 21 C we find the calibrated airspeed to TAS as 97. Last step would be our wind calculations. For the purpose of this exercise and different runways I’ll keep this as a no wind factor problem. Now with a ground speed of 97 we can determine what our minimum feet per minute climb out should be, [(97/60) x 260 = 420fpm]. Can the Seminole complete this task at the current weather condition to the maximum requirement of 7600 departing runway 35? Yes… with a scenario of both engines operational, gear up, and full max weight at take off the Seminole is to perform a minimum of 800 fpm climb at 7,800’. Surpassing the minimum difference by 380’fpm
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