RuskyV Posted April 7, 2022 Share Posted April 7, 2022 I have noticed with the SCAS system as you pass through 100knots bunting the cyclic forwards starts to induce a role to the left as the nose dips, this becomes very twitchy beyond 120knots, with anything over 130knots you start to loose the roll authority to counter this phenomenon, This might well be correct behaviour of course. If the trimmer switch is held to desaturate the SCAS while at these speeds it will start to roll, cycling from left to right. Anything at or below 100knots is fine. Link to comment Share on other sites More sharing options...
frostycab Posted April 7, 2022 Share Posted April 7, 2022 I don't notice it until I'm pushing 120, but given the direction of rotation of the main rotor I assumed it could be down to retreating blade stall. Calling all knowledgeable people! Enlighten me!!! Link to comment Share on other sites More sharing options...
Swift. Posted April 8, 2022 Share Posted April 8, 2022 It sounds quite slow for retreating blade stall, doesnt it? 476th Discord | 476th Website | Swift Youtube Ryzen 5800x, RTX 4070ti, 64GB, Quest 2 Link to comment Share on other sites More sharing options...
frostycab Posted April 8, 2022 Share Posted April 8, 2022 24 minutes ago, Swift. said: It sounds quite slow for retreating blade stall, doesnt it? It does a bit. It only starts to get bad at 135ish. Perhaps RBS was the wrong term. What I was trying to suggest is that at higher speeds my limited knowledge of physics suggests to me that there will at some point be a perceivable lift imbalance, evidenced by OP saying that the roll always seems to begin towards the retreating blade side. Link to comment Share on other sites More sharing options...
NeMoGas Posted April 8, 2022 Share Posted April 8, 2022 Pretty sure this was reported with one of the SMEs here saying it was incorrect. 1 Link to comment Share on other sites More sharing options...
River Posted April 8, 2022 Share Posted April 8, 2022 (edited) Yep, at higher speeds it starts to roll and is quite hard to get out of that roll to one side movement. Edited April 8, 2022 by River Link to comment Share on other sites More sharing options...
admiki Posted April 8, 2022 Share Posted April 8, 2022 1 hour ago, River said: Yep, at higher speeds it starts to roll and is quite hard to get out of that roll to one side movement. Reduce collective, it will reduce blade attack angle and get you out of RBS Link to comment Share on other sites More sharing options...
Solution NeMoGas Posted April 8, 2022 Solution Share Posted April 8, 2022 https://forum.dcs.world/topic/296266-acft-roll-characteristics/ 1 Link to comment Share on other sites More sharing options...
bradmick Posted April 8, 2022 Share Posted April 8, 2022 (edited) 3 hours ago, admiki said: Reduce collective, it will reduce blade attack angle and get you out of RBS At 100knots you are nowhere near RBS. That doesn’t become a concern until about 180+ knots or so. If you’re at high speed and push forward cyclic the aircraft just floats vertically, but I won’t belabor the point, it’s already been reported. Edited April 8, 2022 by bradmick 2 Link to comment Share on other sites More sharing options...
RuskyV Posted April 8, 2022 Author Share Posted April 8, 2022 Thanks for the reply’s, at least it’s a know phenomenon with the flight model. I can work around it easy enough for the time being. Link to comment Share on other sites More sharing options...
admiki Posted April 9, 2022 Share Posted April 9, 2022 17 hours ago, bradmick said: At 100knots you are nowhere near RBS. That doesn’t become a concern until about 180+ knots or so. If you’re at high speed and push forward cyclic the aircraft just floats vertically, but I won’t belabor the point, it’s already been reported. I agree, I was just responding to comment that it is hard to get out of rolling tendency Link to comment Share on other sites More sharing options...
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