Sarix Posted November 8, 2023 Posted November 8, 2023 Attached is the Ka-50 hovering on a calm, no-wind day and the rotor blade disk seems to be tilting at approximately 3-5 degrees. What could be causing this *much* tilt? R7-4800H @ 8x 2.9GHz + (8+16)GB DDR4? RAM + GTX 1660Ti. Gripen needs to be a thing.
Vital061270 Posted November 8, 2023 Posted November 8, 2023 In the rotor axis, the rear end is heavier. The trimmer holds forwards ZAR_Magadan
AeriaGloria Posted November 29, 2023 Posted November 29, 2023 On 11/8/2023 at 6:30 AM, Sarix said: Attached is the Ka-50 hovering on a calm, no-wind day and the rotor blade disk seems to be tilting at approximately 3-5 degrees. What could be causing this *much* tilt? Most helicopters hover nose high, Mi-8/24 can be anywhere from 0-6 degrees depending weight. Apache is I think around 4-6 degrees. A helicopter needs to pitch the nose for in order to maintain forward speed, you want to design a helicopter to fly at cruise speed efficiently. Right now Ka-50 flies in cruise about nose level. If it didn’t hover nose high, it would need 3-5 degrees nose down in cruise. At such an amount of nose down, fuselage/wing drag increases and wing produces negative lift. That is, if I understand your question correctly that it’s about nose angle not the actual rotor disk tilting. 3 Black Shark Den Squadron Member: We are open to new recruits, click here to check us out or apply to join! https://blacksharkden.com
Sarix Posted November 30, 2023 Author Posted November 30, 2023 7 hours ago, AeriaGloria said: Most helicopters hover nose high, Mi-8/24 can be anywhere from 0-6 degrees depending weight. Apache is I think around 4-6 degrees. A helicopter needs to pitch the nose for in order to maintain forward speed, you want to design a helicopter to fly at cruise speed efficiently. Right now Ka-50 flies in cruise about nose level. If it didn’t hover nose high, it would need 3-5 degrees nose down in cruise. At such an amount of nose down, fuselage/wing drag increases and wing produces negative lift. That is, if I understand your question correctly that it’s about nose angle not the actual rotor disk tilting. It was indeed about the rotor disk proper. But the answer is appreciated too! Do you think the rearwards tilt of the rotor disk (relative to the ground) is related to this? R7-4800H @ 8x 2.9GHz + (8+16)GB DDR4? RAM + GTX 1660Ti. Gripen needs to be a thing.
AeriaGloria Posted December 19, 2023 Posted December 19, 2023 On 11/29/2023 at 10:14 PM, Sarix said: It was indeed about the rotor disk proper. But the answer is appreciated too! Do you think the rearwards tilt of the rotor disk (relative to the ground) is related to this? No, but the wing is at 6 degrees incidence and thus produces a slight thrust forward from the rotor downwash. The rearward tilt probably Atleast partially overcomes this 1 1 Black Shark Den Squadron Member: We are open to new recruits, click here to check us out or apply to join! https://blacksharkden.com
Hiob Posted December 19, 2023 Posted December 19, 2023 Keep in mind, that the center of gravity isn't necessarily directly below the rotor shaft (it is shifted aft, I think) and that the rear side of the rotordisc probably produces more lift. 1 "Muß ich denn jedes Mal, wenn ich sauge oder saugblase den Schlauchstecker in die Schlauchnut schieben?"
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