Page 10 - Volume 18 Number 10

Vmc for the I is 85 knots, 91 knots for the XL, with rotation recommended at 90 and 95, and Vyse comes at 110 and 118, respectively. The Vy deck angle is a bit steep for passengers, so 130 to 140 knots is a normal climb speed. The XL starts out at over 2,000 fpm and the I might do 1,800 fpm. The XL can keep its climb power to 17,000 feet or so, where it’s capable of 1,700 fpm, and will manage 1,000 fpm at FL240. The I will not be far behind, but will be temping out around 15,000.The Cheyennes are well-known speedsters, given their low-drag airframe and ample power. Cheyenne I operators typically reduce prop rpm to 1,900, and in the upper teens can see 240 knots TAS on 240 pph fuel flow per side. The airplane holds speed well with power reduced to cut fuel consumption. In the lower Flight Levels, a Cheyenne I can give the same 240 knots on 200 pph fuel flow. If tip tanks are full, the airplanes are particularly long-legged, with up to six hours endurance.The XL, on the other hand, likes FL240, where it gives 265 knots on 240 pph each. With props tweaked back to 1,800 rpm and torque reduced to 750 ft/lbs, it can true out at over 220 knots on just 170 pph, handy for riding a tailwind.Cheyenne cockpit visibility is mixed; the tall side windows give ample vision, while the narrow windscreen somewhat limits forward visibility. Control feel and power is dependable and adequate, even at low speeds, and the airplanes don’t surprise you, even in a full-dirty stall that comes at around 60 knots. In descent and maneuvering for landing, the Cheyenne XL’s flaps are bit more robust, allowing approach flaps at 181 knots, versus the I’s 171 knots. That brings one easily to gear speed of 154-153 knots, and full flaps can go down at 148 knots in the XL, 141 knots in the I. It’s possible to get approach speed down to 95 knots over the fence if the field isSurvival Products Inc.$1370 $1785 Full PageMADE IN THE USA4/C AdPhone (954) 966-7329 FAX: (954) 966-3584 5614 SW 25 St., Hollywood, FL 33023 web: www.survivalproductsinc.comemail: sales@survivalproductsinc.com8 • TWIN & TURBINEOCTOBER 2014