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Post by Br. Marius on Feb 8, 2015 16:53:40 GMT
A main rotor and helicopter characteristics are given as:
Rotor 4 blades, radius = 25 feet, chord = 1.5 feet Tip speed = 700 feet/sec, flap frequency = 1.036/rev Lock number = 8.0 Airfoil CL = 5.73α, Cd = 0.01 Vehicle Weight = 18,000 lbs h = 6.0 ft, lT = 32 ft flat plate area = 25 ft2 xcg = 2 feet forward of shaft axis, ycg = 0 Engine shaft HP = 2000 Assume MxF = 0, and MyF = 0 Assume uniform induced inflow in hover and forward flight with correction factors κhover = 1.15, and κFF = 1.00
(b) Calculate for forward speed of 100 Knots at sea level (e) shaft HP required (f) control settings (g) maximum climb velocity (h) flap response
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Post by Br. Marius on Feb 10, 2015 16:57:13 GMT
For forward flight speed of 100 kts: Power required: 873 hp Max climb rate: 2066 ft/min Collective pitch: 13.1 deg Lateral cyclic pitch: 1.1 deg Longitudinal cyclic pitch: 4.5 deg Cong angle: 6.3 deg Longitudinal cyclic flapping angle: -8.0 deg Lateral cyclic flapping angle: 0.4 deg Shaft pitch: 11.5 deg Shaft roll: -2.2 deg Advance ratio: 0.14
The code I used is in question 1c.
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