- 1 You Are To Trim A Hovering Helicopter 2 A Write The Six Trim Equations For The Helicopter In Hover B 1 (65.89 KiB) Viewed 29 times
1. You are to trim a hovering helicopter. = = = = = = 2 (a) Write the six trim equations for the helicopter in hover. (b) You may assume that both main rotor and tail rotor require only ideal power (neglect profile power). Use the following helicopter parameters: W = 32,000 N, ig = -5°, A = 95 m², AT = 3 m², 2 = 40.2 1/s, 21 = 228 1/s, lt = 6.5 m, ht .72 m, and hm = .96 m. Also note that p=1.225 kg/m at sea level. Find values for TM, TT, a1s, b1s, O, and D. What is the attitude of the helicopter in hover for (M = 0? For Im = 0.25 m (center of mass behind the rotor hub)? For lm = -0.25 m (center of mass ahead of the rotor hub)? See if you can explain why the solution varies as it does with the change in cm location. (C) What control actions does the pilot have to take in order to trim this helicopter for the given center-of-mass locations? That is, what should be the collective and cyclic control angles? Use a = 6,0 = 0.075, and ot -8° = =