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Peter is designing a wonderful 4 place cruiser with the latest in material and propulsive technologies. She has configured the plane such that a very
Peter is designing a wonderful 4 place cruiser with the latest in material and propulsive technologies. She has configured the plane such that a very high efficiency turbonormalized compression ignition engine turns a 97% efficient generator which itself supplies power to a 97% efficient controller driving a set of 95% efficient electric motors turning 80% efficient constant speed propellers. No batteries here. This arrangement allows for a very slick drag coefficient of 0.020 and reasonably low weights. The multiple propellers make the plane nice and quiet. Maximum lift coefficient from the straight, AR = 8 wing is 1.8 with flaps down and 1.3 with flaps up. Peter built a beautifully finished wind tunnel model and has verified the airplane meets the very low Cdo = 0.020 target. Fitting the drag polar, Peter obtains a span efficiency e=0.75, which is in line with her expectations. meet the following performance specs: 1. Cruise speed (sea level, ISA conditions): 150 knots 2. Cruise speed (-13,000 ft, sigma = 0.6): 175 knots 3. Stall speed (sea level, flaps down): 50 knots 4. Stall speed (sea level ISA, flaps up): 61 knots 5. Rate of climb (sea level, ISA conditions): 1,200 ft/min 6. Rate of climb (13,000 ft sigma = 0.6): 600 ft/min Sizing: Prepare two properly labeled and annotated performance.matching graphs for the airplane described above as follows: a. Prepare a matching graph at sea level including cruise speed, stall speeds, and rate of climb Include all lines in the same graph. Include nice readable tables showing data for 1.0
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