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Ian 777 · 04-06-2008, 10:39 AM

Hi

Have just installed DX6i in my belt and am having a problem with it rising and falling without any alteration in the collective input.

video: http://www.youtube.com/watch?v=03B1lShOWxA

I have tried adjusting pitch throttle ratios this does not elimanate it

(It really isn't just my bad flying)

Any help appreciated

all the best Ian

another_finn · 04-06-2008, 11:41 AM

Was it more stable before the transmitter upgrade? Because all I see is bouncing in ground effect... If you enter equilibrium slowly, you can get a stable hover on the cushion of air being compressed between the blades and the floor. But when you drop into it at a steady throttle, the extra lift bounces you back - usually a little higher than the lift from the blades would normally hold you. Unless you correct with the throttle, you then fall back and the yo-yo movement starts.

Did you start correcting more when you got higher, or did the bouncing stop? Seemed more stable when you brought it to knee height.

Ian 777 · 04-06-2008, 12:06 PM

Is that all it is Mika?

I'm afraid I'm still a terrible newb. It was worse with the stock tx but then the response wasn't as good. It's much better in forward flight also I forget how to fly as soon as I switch a camera on and start over controlling

The effect also seems to be intermittant.

Got to go out now see you later and thanks

Ian

DierWolf · 04-06-2008, 12:10 PM

All i see is the effect of the ground effect.

If you want more precise hover at lower altitude in ground effect you will have to Up your headspeed a bit while reducing pitch...

This is programmable thru your throttle curve settings on your TX.

On the Esky its as simple and turning the left knob down .

Ian 777 · 04-06-2008, 02:42 PM

Thanks Dierwolf, Exi looks great by the way.

Here is My belt in forward flight:

Video 2

Forgive the naff rudder control I forget which way up to hold the transmitter when I switch the camera on.

DierWolf · 04-06-2008, 07:32 PM

Looking good, get that tail working

PS... you can embed the youtube video direclty in the post its jsut a little different here
click the YOUTUBE button and then only put in the actual code of the video itself not the
entire link

in your case yours was video N3Fe70tz8QA (whatever is after the v= and before the &)

Ian 777 · 04-07-2008, 02:05 PM

Thanks Dier

You guys are completely right about the ground effect

there is actually nothing wrong with the heli at all.

I was able to run three batteries through it outside tonight and to me it seems perfect.

the cyclic to throttle mixing and the revo mixing for the rate gyro seem just about right, for the price the DX6i is a brilliant radio and pretty easy to set up.

I will post another short vid of it hovering an flying around higher off the ground as soon as it's finished cooking on utube.

Having done a lot of my practice inside and close to the ground I find it really scary taking it higher up where there's nothing to stop it flying away if I put the wrong input in.

All the best Ian.

Ian 777 · 04-07-2008, 03:22 PM

I love this little heli.

DierWolf · 04-07-2008, 05:19 PM

Lookin Good Ian, looking real good.. now a nice trex canopy and your set

Ian 777 · 04-07-2008, 05:24 PM

Yeah I know It is still a Belt though Isn't it

Thanks

DierWolf · 04-07-2008, 05:35 PM

Nothing wrong with a belt

Still got 2 of mine

Ian 777 · 04-07-2008, 05:39 PM

No didnt mean that mate

I meant I hope it's still a belt with all the mods. But I reackon it is

DierWolf · 04-08-2008, 08:16 AM

Belt CP frame still on there so its a Belt

04-06-2008, 10:39 AM	#1 (permalink)
Ian 777 Registered Users My HF Map location Join Date: Mar 2008	Help! why is my heli rising and falling without throttle input (vid) Hi Have just installed DX6i in my belt and am having a problem with it rising and falling without any alteration in the collective input. video: http://www.youtube.com/watch?v=03B1lShOWxA I have tried adjusting pitch throttle ratios this does not elimanate it (It really isn't just my bad flying) Any help appreciated all the best Ian Last edited by Ian 777; 04-06-2008 at 11:13 AM.. Reason: bad link

04-06-2008, 11:41 AM	#2 (permalink)
another_finn Registered Users My HF Map location Join Date: May 2007	Was it more stable before the transmitter upgrade? Because all I see is bouncing in ground effect... If you enter equilibrium slowly, you can get a stable hover on the cushion of air being compressed between the blades and the floor. But when you drop into it at a steady throttle, the extra lift bounces you back - usually a little higher than the lift from the blades would normally hold you. Unless you correct with the throttle, you then fall back and the yo-yo movement starts. Did you start correcting more when you got higher, or did the bouncing stop? Seemed more stable when you brought it to knee height. __________________ T-Rex 600NP, T-Rex 500 ESP, HDX500 SE V2, HDX450 SE V3, T-Rex/Outrage SE V2, EXI450, T-Rex 250, CopterX/Guru-Z hybrid, HBFP separates, Lama V4, 2 x Walkera 4#3B

04-06-2008, 02:42 PM	#5 (permalink)
Ian 777 Registered Users Thread Starter My HF Map location Join Date: Mar 2008	Thanks Dierwolf, Exi looks great by the way. Here is My belt in forward flight: Video 2 Forgive the naff rudder control I forget which way up to hold the transmitter when I switch the camera on. Last edited by Ian 777; 04-06-2008 at 02:51 PM.. Reason: another bad link

04-07-2008, 05:24 PM	#10 (permalink)
Ian 777 Registered Users Thread Starter My HF Map location Join Date: Mar 2008	Yeah I know It is still a Belt though Isn't it Thanks Last edited by Ian 777; 04-07-2008 at 05:26 PM.. Reason: Forgot to say thanks

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04-06-2008, 12:06 PM	#3 (permalink)
Ian 777 Registered Users Thread Starter My HF Map location Join Date: Mar 2008	Is that all it is Mika? I'm afraid I'm still a terrible newb. It was worse with the stock tx but then the response wasn't as good. It's much better in forward flight also I forget how to fly as soon as I switch a camera on and start over controlling The effect also seems to be intermittant. Got to go out now see you later and thanks Ian

04-06-2008, 12:10 PM	#4 (permalink)
DierWolf My HF Map location Join Date: Nov 2007	All i see is the effect of the ground effect. If you want more precise hover at lower altitude in ground effect you will have to Up your headspeed a bit while reducing pitch... This is programmable thru your throttle curve settings on your TX. On the Esky its as simple and turning the left knob down .

04-06-2008, 07:32 PM	#6 (permalink)
DierWolf My HF Map location Join Date: Nov 2007	Looking good, get that tail working PS... you can embed the youtube video direclty in the post its jsut a little different here click the YOUTUBE button and then only put in the actual code of the video itself not the entire link in your case yours was video N3Fe70tz8QA (whatever is after the v= and before the &)

04-07-2008, 02:05 PM	#7 (permalink)
Ian 777 Registered Users Thread Starter My HF Map location Join Date: Mar 2008	Thanks Dier You guys are completely right about the ground effect there is actually nothing wrong with the heli at all. I was able to run three batteries through it outside tonight and to me it seems perfect. the cyclic to throttle mixing and the revo mixing for the rate gyro seem just about right, for the price the DX6i is a brilliant radio and pretty easy to set up. I will post another short vid of it hovering an flying around higher off the ground as soon as it's finished cooking on utube. Having done a lot of my practice inside and close to the ground I find it really scary taking it higher up where there's nothing to stop it flying away if I put the wrong input in. All the best Ian.

04-07-2008, 03:22 PM	#8 (permalink)
Ian 777 Registered Users Thread Starter My HF Map location Join Date: Mar 2008	I love this little heli.

04-07-2008, 05:19 PM	#9 (permalink)
DierWolf My HF Map location Join Date: Nov 2007	Lookin Good Ian, looking real good.. now a nice trex canopy and your set

04-07-2008, 05:35 PM	#11 (permalink)
DierWolf My HF Map location Join Date: Nov 2007	Nothing wrong with a belt Still got 2 of mine

04-07-2008, 05:39 PM	#12 (permalink)
Ian 777 Registered Users Thread Starter My HF Map location Join Date: Mar 2008	No didnt mean that mate I meant I hope it's still a belt with all the mods. But I reackon it is

04-08-2008, 08:16 AM	#13 (permalink)
DierWolf My HF Map location Join Date: Nov 2007	Belt CP frame still on there so its a Belt

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