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沙发
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发表于 2020-12-26 19:20
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本帖最后由 garfieldhummer 于 2020-12-26 23:06 编辑
这一层楼写老外飞手的感受
very good question and not one that all guys think of. i have found that more pitch and less headspeed is always more efficient. pilots like nick maxwell have shown that it doesnt take tons of headspeed to have a quick heli. watch some of his videos, he usually runs 1950 on 700 size helis and he is an amazing pilot. there are some disadvantages to lower headspead. generally, the lower the headspeed, the harder it is to tune out bad tendencies in your fbl unit, but when you get it dialed in, it can fly just as well.
as for the proportions of pitch and headspeed, im not sure if it is linear, like 10% more pitch and 10% less headspeed for the same thrust. but i do know that you can get the same thrust with lower headspeed and higher pitch using much less amperage. i have found a sweet spot with my 7hv running at 2000 rpm with 14.5 degrees of pitch and its fast! i occasionally run upwards of 2300 headspeed on it, but you really get "more moneys worth" (flight time/power ratio) with less headspeed and lots of pitch
Dropping just a little rpms drastically reduces the current (both average and peaks), while increasing pitch increases both, but not a huge amount
On my current favorite machine,.. which is an 800, flying on 12S, I have three flight modes setup, 1100,1400,1600. I know 1600 doesn't sound like a lot but gpms telemetry has shown 106mph downwind (probably 90~95 in reality due to wind), and that's certainly not slow or underpowered. In 1100 it will do very smooth 3D for a long time.I have telemetry and logging on it, so I do know the real numbers, so to speak <G>. In 1100 mode with 16 degrees pitch the peaks are right at 30 amps, hover upright and inverted in the 9 to 10 amp range, very smooth 3D for 20 minutes. In the 1600 mode(only 12 degrees of pitch)there's a lot more "pop" of course with the tip speeds equivalent to a 700 at what most consider "normal rpms" Current peaks in the high 90's (just over triple the 1100 mode), average current in the mid 30's, flight times to 4000mah telemetry alarm are 6 to 8 minutes.
总结了一下这段话：
1、大螺距低转速，平均电流和峰值电流都会下降
2、要达到一样的推力，两者不是线性关系
3、Nick 经常1950飞700，飞机也很快
4、2000rpm飞700 14.5的螺距 很舒服
5、自己logo 800的配置，这个不翻译了
插入几个我认为是复合这个飞行风格的视频，首先是飞logo 700的， VTX717，转速只有2000，但是看视频很爆！ 扭矩很充沛，但是飞机飞行速度不是很快
当然这几个视频都是竞技类的，省电的作用已经不大了，但是这个配置思路也可以试试看，至少不用一直2200飞700这样
还有这个西塔飞手飞X7的，我对比了下前期的飞行，主要是大槳换了VTX，转速可以听出来肯定不是2200那种，不是特别高，但是很有力量，有些动作能看出来不是特别快
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发表于 2020-12-26 19:18
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