New etec hp pack make my hornet fly much better.

[D.Yeo]

Just got a new 2S 1200hp etec pack from mack for my H2, it works fantastic

They hold their voltage much better under load compared to the previous generation one, which usually means much better output under load and it certainly shows with this pack.

It's not quite night and day over the previous generation etecs, but it's much better and the great improvement in performance under load is enough to make a big difference in feel.

Hmm jon you might want to consider this perhaps?

My only complaint is i didnt get to try it much...i started another thread regarding this as i do not want to confuse the two issues.

[glenn cain]

compared with THS AmpVolt batts?

[Fit]

compared with THS AmpVolt batts?

That comparison will come in a week or two

It's not quite night and day over the previous generation etecs, but it's much better and the great improvement in performance under load is enough to make a big difference in feel.

Agreed. I am acutually a bit dissapointed with its performance. Was expecting more but for the price I can't complaint....beggars can't be choosers

Right now if I were to do it all over again, I'll get the tanics aka Irates aka apogee 830 cells. They are the hottest cells available for 10mins of all out power. Furthermore they are only around 55g or so for a 3S pack. They hold their voltage longer than the HP's can. But unfortunately can't get them anywhere locally..

[D.Yeo]

"Agreed. I am acutually a bit dissapointed with its performance. Was expecting more but for the price I can't complaint....beggars can't be choosers"

Hmmm fit actually i'm very happy with the $40 spent, it's the same price as the old etecs and much better.

Hmmm you could always order from bpp though ? they're good and reliable know lots of peple get from there regularly.

Though for me i'd prefer the solidness of a heavy heli with more capable cells the 830 strike me as being a bti strained in a hornet, as it'll be like swapping out a 2000 nicd with a 2100 nimh

right now i'm most happy with the etec hp.just need to get my hornet to stop death diving damn !

[BonJour Brat]

Yup derrick, i got those packs, but are 3s ones from ray.. its now got tons of power but the tail wag's still there.. even when i change to 2s lipo, 11t pinion.. still wags.. i'm using the same gyro as u.. how did u solve ur wagging the last time? mines on min gain already..

[MicroHeli-Nut]

crap man. I loved those batteries. Why did i pass one of my babies to you..... ? i silently regretting.


BonBon,
Have ya tried the gyro centreing method already?????????

My my we're all having the same problems....

small throttle. heli is smooth.

high rpm... the wag comes...

[Super-Hornet]

Hi BonJour Brat

Just in case u interested to know, when I test my Hornet II with feet tied down, I notice that the tail servo is twitching. Different gain also twitching. Tried without motor running (disconnect) and manually turn the Heli on a turntable or something that can turn...tail servo also twitching. Tried without connecting to tail push rod (that is only servo and servo arm) also twitches. I use naro servo (from pico servo to GWS naro)... no twitching!!

I suspect that those pico servo (Coreless Motor) is very sensitive to noise. Our o/p from gyro may generate a lot of noise (Possible need filtering).

Super-Hornet

[BonJour Brat]

Hmm.. good point, but the last time i had the same setup on, with a even worse tail servo mounting method, it dint wag.. the servo is now very firm on the boom with heavy duty tape and two cable ties securing it..

[D.Yeo]

Hmmm i think the issues's universal in that at high rpm the sensitivity of the whole system increases in proportion.

You guys got a good guessimate on the head speed? perhaps your curves are coordinated such they produce too big and increase in headspeed as power is applied.my estimated HS helped with franks tach is 2400 and sounds pretty constant ( till the motor bogs anyway bah )

My gyro's also set to min and if i could turn it even more i would heh, it's still a bit too sensitive for my liking and makes backward flight somewhat ungainly but it's not too bad.

The biggest improvement was to shorten my servo arm.toned down the sensitivity of the whole thing and also helps with the resolution of the gyro

If i wasnt working and always flying the hornet whenever i'm free, i'd probabyl go track down an even shroter arm to try on it.

The moving the gyro back thing didnt do very much, as well, very simpyle i didnt move the gyro very much.
for me it did take a bit of an edge off which i'm hapy with cosniderign i also didn put very much effort in.

If your's is still wagging like crazy maybe you could shove your gyro to the front like doug did.

[Super-Hornet]

Hey... if u all said is the motor speed problem... what about I tried using no motor connected? If it is motor generating too much EMF that cause it, then without motor should not cause twitching.

Super-Hornet

[D.Yeo]

Yeah good point it's possible the 3s jumping around thing had busted the comm up a bit and is causing extra interference.

older motors with out of true comms tend to arc a lot more and throw up more interference.

will consider that possibility after i take a look at the connections and will try and use another spare motor that was intended for the feda.

seems more like esc noise though, as the situation gets worse at partial power settigns. Ack but whatever it is i will defiantely try everything that everyone suggests here.

[Fit]

Agree with superhornet, definitely check the motor and ESC for interference. On my 401, it readily picks up interference and translates them to the tail servo glitching. I find that neither the ESC nor the motor can be close to it. They must be separated by at least a good 4cm away from the gyro to stop the tail from glitching and wagging like crazy. Even at 4cm the servo still twitches a bit at certain rpm. Over 5cm apart its all fine with not a single glitch from the tail servo.
Now I have my gyro all the way to the very edge of the front CF radio tray and is a good 4cm away from the AXI. You can take a look at my electronics mounting atmy photo gallery

[MicroHeli-Nut]

Agreed, but Questions:

On my setup, a 0-INH-50-INH-100 curve yields no tail wag, whilst a 0-75-80-88-100 yields tail wag on the same curve......

RPM too high?

and next, how du i tell if mi servo is driven from a coreless motor?

[Super-Hornet]

Hi MicroHeli-Nut and all

To tell whether your servo is a coreless motor or ferrite motor... If your servo is pico size (like HS-50), then it is most likely coreless. If yours is naro size and above (Like HS-55) then it is most like ferrite motor.

Another way to tell is... Coreless motor servo normally has quicker response time (Like in 0.10s or lower) but with low torque (like in 6kg/cm). In ferrite, your response time is slower but with higher torque (like in 1.2kg/cm)

Another question about arcing. Suppose motor arc causes servo to glitch (due to EMF), then brushless motor should not have such problem because brushless motor do not generate any spark/arc at all.

Super-Hornet

[Fit]

Suppose motor arc causes servo to glitch (due to EMF), then brushless motor should not have such problem because brushless motor do not generate any spark/arc at all.

Thats what I thought in the first place as well! But hell was I wrong. Caused me a lot of frustration as I held on to the above belief. The AXI gave out a lot of noise. Probably its just the high frequency of the ESC that's causing havoc for the gyro. But both the P10 and AXI are the culprits for interference.