throttle servo horn

[crf87]

What spacing from servo horn centre to ball spacing is everyone using with the jr3717hv servo on the throttle? seem to have a small issue when overspeeding as in its kind of hunting fairly bad at around centre stick. Normal flight is fine. I'm using the os55hzr running on opti 25%slv. I've tried messing with the gov gains in the vortex but its not helping at all.

I'm running 18mm from servo horn centre to ball

[waveydavey]

Your spacing should be the same as the throttle arm. So from memory something like 13.5 mm and aim for right angles at mid throttle position. Not sure that this would cause the hunting issues you're seeing. Gain is good around the mid 30's. When you say hunting is it revenge up and down, what are your needle settings out of interest

[crf87]

Both servo horn and carb horn are the same length and are at 90 at mid stick. Gain is mid 40' s. But it is set at 18mm between servo horn center to ball. Wondering if it's too much? It's doing the hunting when it's coming down from a big climb out when it's going from negative pitch to positive pitch. It's also doing it on the stops when doing rainbows.

[waveydavey]

What needle settings especially mid

[crf87]

Mid needle is 3/4 out. High is not quite 1 1/4 out

[myxiplx]

In addition to checking the needle settings and ensuring the engine is well tuned throughout, what throttle curves are you running on the radio?

The vortex uses the underlying throttle curve as it's hint for where the throttle needs to be to maintain headspeed, with the governor essentially fine tuning from there. If you haven't tuned your underlying throttle curve for the headspeed you are running it can cause problems for the vortex.

Your best bet would be to turn off the gov for a few flights, and setup a V curve on your throttle so you have reasonably consistent headspeed. Once you have that, re-enable the governor and tune the governor gains again. A lot of people have struggled with the Vortex gov, and found a huge difference after they setup their curves.

[waveydavey]

Now I never knew that, I can understand the need for a curve in the event of a magnet becoming lost but not sure why a tuned curve should help. I use a very basic curve in my Voretex's and have seen no issues, in fact the integrated governor and ease of setup and reliable head speed was one o the reasons I chose the Vortex

[myxiplx]

Angelos explained it in the thread on helifreak about the new electric gov feature, and several people had problems getting the electronic governor working well and ultimately fixed them when they configured a throttle V curve.

A lot of the time you'll get away without it, but if you're having problems with the governor on the Vortex and you didn't know about this, it can definitely help to go back and check your throttle curves.

It may also be worth looking at the minimum throttle limit, it could be that it's throttling down too low when you overspeed.

[crf87]

My throttle curve is 100 58 55 58 100 in Id2. Id1 is 90 53 49 53 90, and normal is 8 30 42 48 64

[crf87]

Managed to get to the flying field today to try the N5c and its sorted now, all I did was come in a hole on the throttle servo horn and ive put the Gov gain to 30 in the vortex. fly's like a dream now.

Thanks to all who gave advise.