WildBillKelsoe Posted March 6, 2015 Posted March 6, 2015 Is this like a throttle trimmer? Like being close to a rooftop at collective VVI=0 and you mash it while correcting with rudder to achieve a desired sink rate? I fail to understand how this is of use, perhaps one of you helicopter people can explain to me in lay language? Thanks in advance AWAITING ED NEW DAMAGE MODEL IMPLEMENTATION FOR WW2 BIRDS Fat T is above, thin T is below. Long T is faster, Short T is slower. Open triangle is AWACS, closed triangle is your own sensors. Double dash is friendly, Single dash is enemy. Circle is friendly. Strobe is jammer. Strobe to dash is under 35 km. HDD is 7 times range key. Radar to 160 km, IRST to 10 km. Stay low, but never slow.
AlphaOneSix Posted March 6, 2015 Posted March 6, 2015 It only has one use: To ensure that the Engine N2 is being properly governed to 100% when the throttle is fully open. It has no use in-flight.
Sandman1330 Posted March 6, 2015 Posted March 6, 2015 We have used it in the past to save fuel on long trips. Beeping the rotor down to 97% (as low as it can go) as opposed to 100% brings the rotor closer to its max efficiency RPM of 90%, which theoretically saves fuel. How much, I am not sure. I am not sure it is even modelled in DCS. Don't do it if you are making lots of power changes, keep it at 100. Otherwise, your rotor RPM will decay faster when you pull collective. Ryzen 7 5800X3D / Asus Crosshair VI Hero X370 / Corsair H110i / Sapphire Nitro+ 6800XT / 32Gb G.Skill TridentZ 3200 / Samsung 980 Pro M.2 / Virpil Warbrd base + VFX and TM grips / Virpil CM3 Throttle / Saitek Pro Combat pedals / Reverb G2
WildBillKelsoe Posted March 7, 2015 Author Posted March 7, 2015 Thanks. AWAITING ED NEW DAMAGE MODEL IMPLEMENTATION FOR WW2 BIRDS Fat T is above, thin T is below. Long T is faster, Short T is slower. Open triangle is AWACS, closed triangle is your own sensors. Double dash is friendly, Single dash is enemy. Circle is friendly. Strobe is jammer. Strobe to dash is under 35 km. HDD is 7 times range key. Radar to 160 km, IRST to 10 km. Stay low, but never slow.
Joni Posted March 9, 2015 Posted March 9, 2015 so we should increase it until it reaches the far end of the green line right? do we actually know how the power turbine governor works? i mean, how does the power turbine changes its speed when it is actually ruled by the expansion of gases in the chamber? does it change the baldes angle or something like that? Intel Core i5-8600k + Cooler Master Hyper 212 EVO | Gigabyte GTX 1070 Aorus 8G | 32GB DDR4 Corsair Vengance LPX Black 3200MHz | Gigabyte Z370 Aorus Gaming 3 | WD Black SN750 NVMe 500GB | Samsung 850 EVO 250GB | WD Green 240GB | WD Caviar Black 1TB SATA 3 | WD Caviar Blue 500GB SATA 3 | EVGA 650 GQ 80+ Gold | Samsung CF391 Curved 32" | Corsair 400C | Steelseries Arctis 5 --- Razer Kraken X Lite | Logitech G305 | Redragon Dyaus 2 K509 | Xbox 360 | Saitek X-52 Pro | Thrustmaster TWCS | TrackIR 5
xxJohnxx Posted March 9, 2015 Posted March 9, 2015 Well, the turbo-jet drives (N1) a turbine (N2). The turbine is connected to the rotor via a gear-box. If you want to increase the rotor rpm the turbine rpm has to increase as well (because they are basically on the same shaft). To increase turbine rpm you have to push more air through it, which is done by incrasing the rpm of the turbo jet. To achieve this, the governor allows more fuel to the turbo jet. Note: Turbo jet and turbine possibly aren't the correct terms for it. With turbo jet I mean the compressor/combustion part (N1) that produces the power, and with turbine (N2) I mean the "windmill" that is connected to the gear box and subsequently the rotor system. Check out my YouTube: xxJohnxx Intel i7 6800k watercooled | ASUS Rampage V Edition 10 | 32 GB RAM | Asus GTX1080 watercooled
Joni Posted March 9, 2015 Posted March 9, 2015 Well, the turbo-jet drives (N1) a turbine (N2). The turbine is connected to the rotor via a gear-box. If you want to increase the rotor rpm the turbine rpm has to increase as well (because they are basically on the same shaft). To increase turbine rpm you have to push more air through it, which is done by incrasing the rpm of the turbo jet. To achieve this, the governor allows more fuel to the turbo jet. Note: Turbo jet and turbine possibly aren't the correct terms for it. With turbo jet I mean the compressor/combustion part (N1) that produces the power, and with turbine (N2) I mean the "windmill" that is connected to the gear box and subsequently the rotor system. yes, but the governor you just mention is not the one that is controlled with the switch in the collective, the one you mention is the primary governor that controls fuel on the gas producer thereof n1 speed thereof n2 speed thereof nr speed the governor that is on the collective is the free turbine (or power turbine) and my question was about how does the second governor physically changes the free turbine speed since its speed is a result of the n1 speed, so it must be something with the blades or something like that notice that when you flip the switch you are changing the free turbine speed and not the gas producer, notice also that when you increase it you are not increasing gas producer as it will be higher for two seconds and then return to its former value when governed by the primary fuel governor Intel Core i5-8600k + Cooler Master Hyper 212 EVO | Gigabyte GTX 1070 Aorus 8G | 32GB DDR4 Corsair Vengance LPX Black 3200MHz | Gigabyte Z370 Aorus Gaming 3 | WD Black SN750 NVMe 500GB | Samsung 850 EVO 250GB | WD Green 240GB | WD Caviar Black 1TB SATA 3 | WD Caviar Blue 500GB SATA 3 | EVGA 650 GQ 80+ Gold | Samsung CF391 Curved 32" | Corsair 400C | Steelseries Arctis 5 --- Razer Kraken X Lite | Logitech G305 | Redragon Dyaus 2 K509 | Xbox 360 | Saitek X-52 Pro | Thrustmaster TWCS | TrackIR 5
Sandman1330 Posted March 10, 2015 Posted March 10, 2015 yes, but the governor you just mention is not the one that is controlled with the switch in the collective, the one you mention is the primary governor that controls fuel on the gas producer thereof n1 speed thereof n2 speed thereof nr speed the governor that is on the collective is the free turbine (or power turbine) and my question was about how does the second governor physically changes the free turbine speed since its speed is a result of the n1 speed, so it must be something with the blades or something like that notice that when you flip the switch you are changing the free turbine speed and not the gas producer, notice also that when you increase it you are not increasing gas producer as it will be higher for two seconds and then return to its former value when governed by the primary fuel governor Think of it this way: as John explained, there are two main sections to the engine, the gas compressor section (N1) and the power turbine section (N2). The power turbine (N2) is like a windmill, the kind you played with as a kid. The more air you blow through it, the faster it will spin. It is directly connected to the transmission, and from there split off to the main rotor and tail rotor. Therefore, it directly drives both rotors. Therefore, the faster the N2 turbine spins, the higher your rotor RPM. Now think of the compressor section (N1) as your lungs. The harder you blow, the faster you spin the windmill (N2). So, if you dump more fuel into the compressor section, it creates more pressure (and as a byproduct more heat, watch the ITT gauge and you'll see). The more pressure going into the windmill, the faster it spins. Therefore, the governor does indeed control N2 speed by increasing / decreasing fuel flow into the N1 section. Incidentally, this is the same governor that increases and decreases fuel flow when you move the collective, all the "beep" switch does is allow the pilot a fine adjustment of where exactly he wants the governor to keep the Rotor RPM at. Whether DCS correctly models the N1 speeds, I'm not sure. TBH, I rarely look at the N1 when flying real helos, so I don't know how it changes with changes to the "beep" switch - we are slaves to the RRPM, torque and ITT, generally. The governor does not influence blade pitch - but I can see where you may think this, as that is indeed how a constant speed propellor on a fixed wing airplane works. However, it is not the same in a helo. Ryzen 7 5800X3D / Asus Crosshair VI Hero X370 / Corsair H110i / Sapphire Nitro+ 6800XT / 32Gb G.Skill TridentZ 3200 / Samsung 980 Pro M.2 / Virpil Warbrd base + VFX and TM grips / Virpil CM3 Throttle / Saitek Pro Combat pedals / Reverb G2
Joni Posted March 10, 2015 Posted March 10, 2015 ....all the "beep" switch does is allow the pilot a fine adjustment of where exactly he wants the governor to keep the Rotor RPM at. Thanks for your help!! Intel Core i5-8600k + Cooler Master Hyper 212 EVO | Gigabyte GTX 1070 Aorus 8G | 32GB DDR4 Corsair Vengance LPX Black 3200MHz | Gigabyte Z370 Aorus Gaming 3 | WD Black SN750 NVMe 500GB | Samsung 850 EVO 250GB | WD Green 240GB | WD Caviar Black 1TB SATA 3 | WD Caviar Blue 500GB SATA 3 | EVGA 650 GQ 80+ Gold | Samsung CF391 Curved 32" | Corsair 400C | Steelseries Arctis 5 --- Razer Kraken X Lite | Logitech G305 | Redragon Dyaus 2 K509 | Xbox 360 | Saitek X-52 Pro | Thrustmaster TWCS | TrackIR 5
WildBillKelsoe Posted September 8, 2015 Author Posted September 8, 2015 thanks for your help guys. I appreciate it. So I am not touching this anymore (or mapping it anymore on my HOTAS). Thing is, I noticed that with throttle fully open, on 324/6600, if you hold it to increase, the RPM suddenly increases, with left yaw. Try it on the ground. AWAITING ED NEW DAMAGE MODEL IMPLEMENTATION FOR WW2 BIRDS Fat T is above, thin T is below. Long T is faster, Short T is slower. Open triangle is AWACS, closed triangle is your own sensors. Double dash is friendly, Single dash is enemy. Circle is friendly. Strobe is jammer. Strobe to dash is under 35 km. HDD is 7 times range key. Radar to 160 km, IRST to 10 km. Stay low, but never slow.
WildBillKelsoe Posted September 8, 2015 Author Posted September 8, 2015 http://forums.eagle.ru/showpost.php?p=2275831&postcount=8 AWAITING ED NEW DAMAGE MODEL IMPLEMENTATION FOR WW2 BIRDS Fat T is above, thin T is below. Long T is faster, Short T is slower. Open triangle is AWACS, closed triangle is your own sensors. Double dash is friendly, Single dash is enemy. Circle is friendly. Strobe is jammer. Strobe to dash is under 35 km. HDD is 7 times range key. Radar to 160 km, IRST to 10 km. Stay low, but never slow.
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