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HelicopterBeginners Corner › hovering
06-03-2004 07:21 PM  13 years agoPost 1
soupy01833

rrNovice

georgetown,ma

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I feel like a yoyo when trying to hover in the wind. I don't have any side to side problems but keeping the heli from bobbing up and down is a challenge. By the time I put my collective correction in for the heli dropping it is pretty much bouncing off the ground. Does anybody have some pointers on this? I am getting better though.
Right now have my normal switch setup as -1 at bottom stick +5 at 1/2 stick and +7 and top stick.

The only other question I have is how necessary is it to have a tach? Do your blades have to be at ~1650 rpm for hovering?

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06-03-2004 07:43 PM  13 years agoPost 2
archangel

rrApprentice

Pasadena, CA - USA

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Hovering into the wind will cause you to bob up and down. As the wind increases, your rotor disk generates more lift, hence you go up. Practice will minimize this, but wind will always affect your heli somewhat.

You should try to practice in fairly calm conditions until you learn to anticipate the heli better.

I don't think it is necessary to buy a tach at first, if you can find someone who will let you use one. It will become an issue as you progress into forward flight that you will want your pitch curves set as well as possible.

For hovering, 1500-1650 RPM is good. As long as you are not getting the low speed "nod" (where the heli pitches up and down uncontrolably) your rpm is fast enough. If your ship seems a little "touchy" on the collective, and you are set at -1,5,7 or so, then lower the RPM slightly.

I hope this helps

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06-03-2004 08:15 PM  13 years agoPost 3
RaptorPraetor

rrApprentice

Carlsbad, New Mexico

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Make life easier for yourself and set up your pitch curves linear throughout all flight modes. in normal mode on a 5 point graph set it at

1) 50%
2)50%
3)50%
4)75%
5)100%

You hover at 3/4 stick but in the long run it will save you the trouble of moving to linear curve in idle 2 when you start areobatics. NOt only that but you set up the end points and that's it. Easy

Best way to hover in the wind is predict what it is going to do. The wind and the heli. Feel the wind with you face and think about what is going to happen. It takes practice but it can be learned.

Head speed does not matter as much as blade pitch when in hover. What ever your head speed (within reason)the bird will lift off the ground at 5 degrees.

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06-03-2004 09:59 PM  13 years agoPost 4
allns47

rrKey Veteran

Richmond IN.

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Using 5 degree in the center and hardly no negative pitch at low stick will cause this yo yo effect in the wind...Go straight with a -9 0 +9....Or even you do not want that much negative go..... -4 0 +9....

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06-04-2004 04:03 AM  13 years agoPost 5
lpearce

rrApprentice

Pukekohe, Auckland NZ

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just a question raptorpraetor, if you set ur curves to what you have said wouldnt the heli be reving its nuts off at bottom stick being 50% wouldnt that engage the clutch and you wouldnt have an idle. might be a dum question i dont know im just learning sorry if it is obvious and I just cant see it.

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06-04-2004 03:51 PM  13 years agoPost 6
mobywho

rrApprentice

Duluth, GA

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RaptorPraetor

If that is your setting. I think you linkage is wrong. Your engine speed should increase as your stick move up, not stay idle until you pas half stick. Please don't take offense to this just trying to learn here.

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06-05-2004 08:36 AM  13 years agoPost 7
drsuessmn

rrVeteran

Ellendale Minnesota USA

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I
Make life easier for yourself and set up your pitch curves linear throughout all flight modes. in normal mode on a 5 point graph set it at
I think he means pitch curves not throttle curves

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HelicopterBeginners Corner › hovering
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