Finally bought my first heli

[gurnster75]

What with santa coming and the wife asking what I wanted and knowing that if I say nothing I'll end up with socks I asked for an Mcpx, I've got the case for it on order from fast lad and a case for my Dx6i so all sorted. I'm not ready to fly this yet so i'll be sticking with flying it on phoenix for now. I'm not too bad hovering it, the only problem I have is when I stop giving it throttle, there seems to be no point on the stick where the heli descends slowly, it goes from throttle up to blades stopping and falling like a brick. Is this usual with it being cp or am I doing something wrong, I've set the sim up correctly (I think) from the link I was given on 1 of my earlier threads.

[Grumpy]

Sounds like you have the throttle curve set wrong so that you are cutting power when you move the collective stick down. Personally I'd advise to fly in idle up, so that the throttle curve is almost a flat line. You can either power up in normal mode and switch to idle up before lifting off, or (better IMHO) just use throttle hold as your start/stop switch and don't have a 'normal' mode at all.

[tomatwalden]

..... there seems to be no point on the stick where the heli descends slowly, it goes from throttle up to blades stopping and falling like a brick. Is this usual with it being cp or am I doing something wrong, I've set the sim up correctly (I think) from the link I was given on 1 of my earlier threads.

Definitely something wrong. The whole point of collective pitch is that height is controlled by (collective) pitch - not throttle (which should stay constant).

Remember, on a DX6i, the left stick up/down movement controls two different things - pitch and throttle - according to the two separate curves (pitch curve and throttle curves).

You've probably got a pitch curve which has very little negative (ie. below 50%). And possibly a linear throttle curve (or something equally odd!)

Take a look at your DX6i, and post back here the values you have for both your throttle AND pitch curves.

[tourerjim]

If your flying in norm throtle mode then throttle below 50% is also collective below 50% which give a negative that also cuts the motor so set trottle linear 0, 100, 100, 100, 100 & pitch linear to 35, inh 50, 75, 100

[tomatwalden]

If your flying in norm throtle mode then throttle below 50% is also collective below 50% which give a negative that also cuts the motor so set trottle linear 0, 100, 100, 100, 100 & pitch linear to 35, inh 50, 75, 100

That pitch curve looks a little odd to me? "inh" ? .. I would have suggested a pitch curve of 30,40,50,75,100 ??

[tourerjim]

That pitch curve looks a little odd to me? "inh" ? .. I would have suggested a pitch curve of 30,40,50,75,100 ??

Cant see whats wrong" this setup my grandson uses as he likes to play with curves to get the best flight on his mcpx on phoenix & allows for him doing some loops etc

[tomatwalden]

Cant see whats wrong" this setup my grandson uses as he likes to play with curves to get the best flight on his mcpx on phoenix & allows for him doing some loops etc

I'm not sure how you even put an "inh" in a pitch curve !?!

[tourerjim]

I'm not sure how you even put an "inh" in a pitch curve !?!

I've got 3 tx's all have inh ie 0, inh 50, inh 100 or 0, inh, inh, 50, inh, inh,100

[tomatwalden]

Wasn't aware you could do that! You learn something new every day. So the "inh" just means this bit of the curve isn't specified, and a linear line between the other points is assumed?

[dillwhacker]

New one on me this. Rather strange TBH
I suppose if you want 0,25,50,75,100, it avoids you having to calculate the mid-point between 0 and 50...

[tourerjim]

Not sure on my grandsons 5 point curve tx but one he uses hear 7 point curve it equates to 37, 41.5, 45.5 50, inh, inh, 100 this then with throttle curve 0, & 100 flat line gives him enough negative without power loss for his nice controlled loops & also fines its his best setup so far for landing.

[tourerjim]

Not sure on my grandsons 5 point curve tx but one he uses hear 7 point curve it equates to 37, 41.5, 45.5 50, inh, inh, 100 this then with throttle curve 0, & 100 flat line gives him enough negative without power loss for his nice controlled loops & also fines its his best setup so far for landing so he doesn't drive the heli into the ground with to much negative, this post is is for Gurnster75 to give hive better understanding of curves so he could start his traning with the same throttle curve with pitch 45, 42.5, 50 75, 100.

[Grumpy]

Wasn't aware you could do that! You learn something new every day. So the "inh" just means this bit of the curve isn't specified, and a linear line between the other points is assumed?

For a linear curve with no exponential, yes. Inh literally means that the point is inhibited or removed, so the Tx draws the curve without considering that point. But if its a 'curvey curve' with exponential to smooth between the points then you will get a curve forming between the remaining points.

[tourerjim]

For a linear curve with no exponential, yes. Inh literally means that the point is inhibited or removed, so the Tx draws the curve without considering that point. But if its a 'curvey curve' with exponential to smooth between the points then you will get a curve forming between the remaining points.

Wasn't aware you could do that! You learn something new every day. So the "inh" just means this bit of the curve isn't specified, and a linear line between the other points is assumed?

Just to help to keep things on learning level on this post, im also helping my grandson & hope it also helps Gurnster75 to understand curves but for the little amount of negative curve used expo/DR is of no value really only if used on the collective pitch range, but teaching yourself what trottle/pitch curve can do is better than using expo/DR for beginners, once my grandson gets more into flights of 8's & circuits then poss more neg is needed then perhaps he'll need to introduce expo/DR.

[heliboy]

Yeah the inhibit shows up if you dont change the number only on some txs though.