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Discussion
Nano S2 Pitch and Throttle Curves
I have a basic understanding of the 2 curves and what they are doing. My problem is in regards to the numbers that are entered into the transmitter. I have a DX6e Gen2. The throttle curves seems simple. The settings 0-25-50-75-100 just indicate that the speed of the motor increases from 0 to100% in a linear fashion. The 100-100-100-100-100 indicates full motor speed all the time.
The pitch curve numbers make no sense to me. What does 0-25-50-75-100 mean? Does "0" mean full negative pitch? Is "25" half negative pitch? Is "50" no pitch? Is '75" half positive pitch, and "100" full positive pitch. What confuses me more is having both throttle and pitch operating at a 0-25-50-75-100 at the same time for the first 2 beginner flight modes. What is happening. Is the pitch going from negative to positive at the same time as the throttle is going from 0 to 100? I am more of a sport flyer. I fly fixed wing planes and my helicopter is just a relaxing break, no 3D. If I want to make the Nano S2 less aggressive in pitch, especially in negative, what numbers should I be experimenting with. Can this "taming" be done in all 3 flight modes? |
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Nano S2 Pitch and Throttle CurvesQuote:
I think your understanding on throttle and pitch curve is basically correct provided that - there’s no internal setting / mixing defined in the 4-in-1 board of the nS2; - no expo/dual rate/etc. that act on those throttle/pitch curve; - Blade pitch has been adjusted so that it has zero pitch in mid throttle stick (50%). Per my understanding on nS2, base on default settings on manual: - Normal mode (SAFE-Z) will have your pitch curve limited and stability mode turn on; so you can’t use the full negative/positive pitch even with 0-100% pitch curve. Throttle curve may also have same limitations/damper set in FBL board so you can’t over-throttle it. - Flight mode 1 (SAFE) will have full positive/negative pitch but also have stability turn on (so the blue LED) and you can use the full positive/negative pitch and throttle curve with stability. - Flight mode 2 (3D mode) will NOT have stability engaged and you’re in charge of the Heli’s levelling as well as full positive/negative pitch and throttle curve. You can only do inverted flight in this mode. For scale flying you may try (in flight mode 1/2) throttle curve 0-30-60-60-60 Pitch curve 30-45-61-73-85 (something similar) For less negative pitch and just enough positive pitch for relax flying. Above throttle/pitch curve is from an old RCGrouper CaptJac (if I remember correctly). EDITED: per working on throttle curve and pitch curve question: I would say yes. When in upright position (not inverted position) you don’t want to fire your heli to the sky or slam it down to the floor... the linear pitch/ throttle curve ensure you will not push the heli to the ground full force (but still have enough negative pitch and motor power to keep it grounded if windy outside) and gradually increase motor power in positive pitch (more lifting force). Hope it helps. EDIT2: found the origin post from CaptJac about scale flying. You may be interested. https://www.rcgroups.com/forums/show...T-for-everyone Sent from my iPhone using Tapatalk |
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Last edited by HumanYeung; Oct 15, 2019 at 04:27 AM.
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[QUOTE=BobMP;42945119]What confuses me more is having both throttle and pitch operating at a 0-25-50-75-100 at the same time for the first 2 beginner flight modes. What is happening. Is the pitch going from negative to positive at the same time as the throttle is going from 0 to 100?
[QUOTE] I also think you have the understandings of Throttle and Pitch curves correct ..... very much better than whoever came up with the Mode 1 Stability Throttle Curve. I set mine to 80% across the board but hardly ever fly in that mode, more to see if it could be done when so many were saying you couldn't change it. The SAFE-Z mode has a cushioning effect built in which slows the upward and downward response of the heli, as far as I can tell that is built into the FC, the Stability Mode does not, so when you give it negative pitch, it also reduces headspeed further accelerating the helicopter toward the Horizon Hobby Spare Parts webpage! I would not set the throttle curve on that mode to have anything less than 60% throttle on any point. I flew mine last night in the house in that mode testing things out after some repairs .... it did okay, but if I were to fly it indoors more at that mode my curve would not be 80% across but more like 75-67-60-67-75. I do however like pitch curves to a linear 0 to 100 line, but when I started I did use 30-40-50-75-100 in the beginner modes on my nano CPS. |
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On my Nano s2 I have very little altitude control. It will climb okay but when I try to bring it back down I almost have to shut the throttle all the way off? I got a DX8 Gen 2 from my buddy and got it programmed up tonight and it's still flies the same way in mode 1 but in mode 2 it shoots up in the sky with no altitude control at all?
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Nano S2 Pitch and Throttle Curves
Per my understanding on stability (flight mode 1) it do have self levelling without throttle dampening so it has faster throttle stick response than SAFE-Z (normal mode). Not sure if it affects the throttle response too. But according to manual setup motor power is reduced (0-50% throttle curve) in negative pitch (0-50% pitch curve) so it may be the reason on slow descending in stability mode. You may try to use a flat throttle curve (eg 75% flat curve) and see if thing improves.
3D mode ( flight mode 2) have no attitude control nor self levelling at all. Very fast response on throttle stick. Being 100% flat throttle curve it only control collective pitch so the motor is in full power on positive/negative pitch. On DX8 gen2 when changing from flight mode 1/2 to normal mode (during mid air hover) my nS2 will even go up a bit. When I lower the throttle to full bottom i can see it gradually descend to ground and then stop the motor. nCPS doesn’t have such behaviour. Sent from my iPhone using Tapatalk |
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Sounds to me like you have the throttle curve and pitch curve mixed up. We don't ever set the pitch curve to a static number unless we are trying to make our CP helicopter fly like a Fixed Pitch .... and then for a Spektrum probably 60-70% would be the number to play with that and the throttle would be 0-25-50-75-100.
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I'm one to talk, broke 1 pin and fouled 1 new main blade on my nCPS on Monday in grass, and almost totalled my nS2 the day before fly over grass, but lost it in inverted practice and of course it rocketed 30 feet toward the concrete after I hit TH. It's all good now, new frame (3 pins were broken), tail (shaft split) and feathering shaft, new landing gear (previous breakage had me using a damaged spare), and new main blades .... after killing almost 2 dozen dragonflys with the nS2 during the last 60 flights, the blades were pretty cracked up (there may have been a few hard, not on the skids, gravity induced landings in there too!). |
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