Henry Rollins
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Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
Boy does that explain a lot. I have been wondering why that is for a year! -
Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
This is further proof that the limit droop improvement is not working properly in the flight model. -
Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
Found this in DCS huey POH. It really feels like this is missed which is odd considering it's suppose to be 2030 something. "Without this characteristic instability would develop as engine output is increased resulting in N1 speed overshooting or hunting the value necessary to satisfy the new power condition." Damn n1 won't keep up! Not only that but it creates WAY too much yaw as RPM constantly fights to keep up. 2.4.5. Droop Compensator A droop compensator (#1 in Figure 2.8) maintains engine rpm (N2) as power demand is increased by the pilot. The compensator is a direct mechanical linkage between the collective stick and the speed selector lever on the N2 governor. No crew controls are provided or required. The compensator will hold N2 rpm to 6600 rpm when properly rigged. Droop is defined as the speed change in engine rpm (N2) as power is increased from a no-load condition. It is an inherent characteristic designed into the governor system. Without this characteristic instability would develop as engine output is increased resulting in N1 speed overshooting or hunting the value necessary to satisfy the new power condition. -
Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
I can tell you that it is unrealistic. The affect is called Gyroscopic Precession which is when a force is applied (cyclic input) the reaction occurs 90 degrees later. So think about how long it takes for a rotor blade to cover 90 degrees and that is the amount of lag you should feel when making cyclic inputs. You all can test this by going from a hover into forward flight. Your helicopter if it's NATO should roll to the right (or to the left if it's a hellcat. This is called Transverse Flow Effect - as the helicopter accelerates into forward flight induced flow (downforce) drops to near 0 at the forward rotor disc area. This increases the angle of attack at the front rotor disc area causing the forward blade to flap up, and reduces the angle of attack at the aft rotor disc area causing the rotor blade to flap down. Because the rotor blade acts like a gyro (gyroscopic precession) maximum displacement occurs 90 degrees later in the direction of rotation. The result is a right roll as you accelerate past around 20 kts or right before ETL (effective translational lift). -
Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
It's definitely there with Thrustmaster warthog hotas. It has to go, I don't understand why it was there in the 1st place. -
Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
Can you provide a link so that we may read your findings? -
Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
Gatordev settling with power can be practiced at altitude, the instructors put you in it and you get yourself out of it. On that note there is a new way to get out of it beside 1) lowering collective 2) forward cyclic 3) pull collective. The new way they teach it is 1) aggressive right cyclic 2) pull collective 3) LEFT pedal (or the reverse). You lose less than half the altitude, something that is precious when VRS happens on accident on approach to landing. -
Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
I can tell you that in Robinson R-22's and R-44's, which is all I have every flown, both the cyclic and collective are VERY responsive. Most of the time if someone is having issues its because the controls are too responsive and they over correct. -
Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
VRS and settling with power are the same thing. Trust me I have been in it several time in real life and it's on both FAA exams. ---------- Post added at 08:43 AM ---------- Previous post was at 07:57 AM ---------- This guys information is correct. -
Arma 3 Helicopters DLC Discussion (dev branch)
Henry Rollins replied to FredAirland's topic in ARMA 3 - GENERAL
I will give You 3 reasons: 1. Ever had an engine failure? Engine tach goes to 0 you immediately autorotate. 2. Ever descended so fast you overspeed the rotor? When the red light comes on it's already too late. 3. Ever takin off with a heavy load in a little bird. Engine rpm lowers to the point of stalling then everyone dies. On the 3rd reason BH will you please add a low rpm warning horn along with the light?? -
Arma 3 Helicopters DLC Discussion (dev branch)
Henry Rollins replied to FredAirland's topic in ARMA 3 - GENERAL
I don't know about you guys but I could really use an engine and rotor rpm gauge. -
Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
If you ever played TOH when you use max power and your torque indicator light turned red for too long there was damage done to the gear box which caused the same type of vibrations. I would just guess that you were using a lot of power when you were fully loaded and over torqued the AC. -
Advanced Helicopter FDM Feedback
Henry Rollins replied to aluc4rd's topic in ARMA 3 - DEVELOPMENT BRANCH
Until BI implements a throttle separate from raising collective autorotations will not be possible unless you truly have an engine failure ie red in the engine indicator. This is caused by a correlation between raising the collective and turning on the engine. In effect this re-engages the engine drive to the rotor blades disengaging the sprag clutch Which allows us to autorotate. The final affect is a massive drop in rotor rpms causing the blades to stall. IRL we put the throttle into the detent (roll it off completely) to prevent the throttle from correlating to the collective. Or else we would really die just like in Arma 3. -
Arma 3 Helicopters DLC Discussion (dev branch)
Henry Rollins replied to FredAirland's topic in ARMA 3 - GENERAL
I hoe they add the TOH startup process which will require the addition of a throttle for helicopters in the controls config section. Same for APU's -
Arma 3 Helicopters DLC Discussion (dev branch)
Henry Rollins replied to FredAirland's topic in ARMA 3 - GENERAL
That video is exciting you just experienced retreating blade stall due to passing VNe or velocity never exceed. Nicely done Bohemia!