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Helicopter
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Century Radikal E640 - Swift 16 NX
› CP Hummer goes 3D pt2
06-03-2004 10:20 PM  13 years agoPost 21
wilsonj

rrApprentice

Waikerie, South Australia

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Hi Lift,

thanks for the graph. very interesting. Although even at 80% and 10C it still shows approx 3.2v per cell. Giving a total of 9.6. That shouldn't cut it off. Best thing to do is maybe turn it off anyway and see.

You know I am not sure how important voltage cutoff is on a heli anyway. I think you will have to land due to lack of power, before the battery gets dangerously low. Unlike in a plane where you could keep flying until the pack is almost totally flat.

Might be worth trying anyway.

Regards
Jamie

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06-03-2004 10:47 PM  13 years agoPost 22
zoom

rrElite Veteran

Galveston, Texas

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I think I would prefer the hard cutoff if at all, that way if the system shuts down, I know i should have enough juice left in the packs after resetting to atleast power the servos, as well as enough power to obtain adequate head speed to soften the helis landing with full control, as opposed to some instances with the soft cut off. But truthfully, once you get to know your new heli, its performance, and the battery packs, you can pretty much tell when it is time to bring her down before the cutoffs settings even have a chance to take over.

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

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06-03-2004 10:57 PM  13 years agoPost 23
tabbytabb

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seattle

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Hey guys I just wanted to chime in here about your shutdown while doing tic tocs.

I use a phoenix 10 and appogee 830's on my H2 and it pulls 12 amps static. I dont get cutouts ever and here are my settings.

Overcurrent disabled, LVC 5V (I would rather toast a pack then have the LVC activate)

The first thing I would look to is your Rx and p-10 placement. Get the speed control as far away from everything else as possible. The phoenix 10's seem to spew Rf and can cause cutout even with the berg.

I have found sometimes as little as 5mm different placement on the ESC can fix the problem.

Tabb

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06-03-2004 11:00 PM  13 years agoPost 24
wilsonj

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Waikerie, South Australia

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I guess if you weigh up costs also, it would have been cheaper to stuff a pack of apogees, than to break a set of H2 blades!

In the sky, a hard cutoff would mean almost certain crash. Loosing control of such a small heli, for even a short period, can be a very hard thing to recover from.

Probably the best thing is to use a timer and just land when it goes off. Just got to work out how long that should be!

Regards
Jamie

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06-03-2004 11:07 PM  13 years agoPost 25
wilsonj

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Waikerie, South Australia

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Tabbytab,

thanks for your input. Yeah I agree, rather toast a pack than crash. Blades alone are worth more! Although that will change....

Interesting what you say about the P10. Mine is touching! my Rx. Might have to move it right away and try again.

Regards
Jamie

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06-03-2004 11:08 PM  13 years agoPost 26
zoom

rrElite Veteran

Galveston, Texas

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Glitches??? even with the Berg 6 III (supposedly the best micro rx know to man)??????

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

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06-03-2004 11:42 PM  13 years agoPost 27
tabbytabb

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seattle

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good plan, get the ESC as far away from anything else as possible. I usually zip tie mine to the read landing gear struts. That is about as far away from everything as I can get it

Tabb

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06-04-2004 01:46 AM  13 years agoPost 28
fwilly

rrNovice

Weatherford TX

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I was thinking that maybe it was pulling more amps while doing tic tocs than it was static. I may be thinking of the wrong manuver, but in a tic toc, the heli is going one way, with a good bit of speed and momentum, and then you instantly reverse direction by reversing the collective. That seems like it would be worse than static, because for a split second it may have still been moving against the collective. The packs voltage may not have recovered fully in the brief moment before its time to reverse the collective again, and it would drop further. I may just be thinking to hard. Tabbs probably right. On my Berg, the servos never jump when it glitches, or even when I turn my TX off with it still plugged in. If it did glitch, then the power cutting may have been the only thing you noticed, but the fact that it went into soft cut off still confuses me.

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06-04-2004 02:01 AM  13 years agoPost 29
tabbytabb

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seattle

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I dont think it is really soft cutoff, what happens is when the P-10 sees a glitch it shutsdown and goes throught the very soft start sequence again.

It really should be set so it holds last known position, then it would just remain at 85% minimum and you wouldnt have a problem unless you received a massive debilitating glitch which would give your micro a dirt nap anyway

I spoke with CC regarding this feature and Shawn said it would probably be adjustable in the future via the phoenix link

Tabb

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06-04-2004 02:24 AM  13 years agoPost 30
wilsonj

rrApprentice

Waikerie, South Australia

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Some very interesting thoughts on what might be happening.

fwilly, You are right in your assumption of a tic toc, the object also is to keep the tail pretty much in the same position. Not sure if its really possible with these smaller helis though, unless you had a virtually slop/flex free collective.

I am still only guessing that my esc is going into an overload state and soft stopping. It all happens so quick that it could be a glitch or bad wire somewhere. (doubtful).or something else....

Another strange thing I noticed was that my 401 light in HH mode fllickers while hovering. Not flash but "flicker". Thats without any tail input from me. On the ground its fine and glows constant. I have never taken much notice before. But I would have though the LED would stay on until it receives an input from me!?

Regards
Jamie

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06-04-2004 06:14 AM  13 years agoPost 31
wedge

rrElite Veteran

Victoria BC, Canada

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Hey wilsonj where do you get the high voltage DD tail from, I am running the regular dd tail and 3 cell packs and the volts is to high, I got a CSM HLG200 and get tail wag, so I am looking how to regulate the voltage but what is the high voltage DD motor rated at for volts.


Thanks

Will

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06-04-2004 07:32 AM  13 years agoPost 32
zoom

rrElite Veteran

Galveston, Texas

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wedge

this may help.

http://www.runryder.com/helicopter/t110415p1/

Predator, Raptor 30, TRex CCPM 450TH, 3D Pro 400F

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06-04-2004 05:00 PM  13 years agoPost 33
Lift

rrElite Veteran

Houston, TX

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Jamie,
I'm waiting on my Schulze 105 and haven't gotten it back in the air with all these new upgrades. But, I wanted to ask how the cyclics are? The manuevers you say are what I'm going to be doing and I'm curious on the roll/flip rate.

How do you think it will do with the sym Century woodies? Looking at the head on the bench there is not much direct swash input.

I got the head shimmed up, +10/-8 with the plastic headblock(metal one on standby), and the woodies have the roots glued and have been balanced. I'm going to crank here up!!!

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06-06-2004 11:30 AM  13 years agoPost 34
wilsonj

rrApprentice

Waikerie, South Australia

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Wedge,

You need to get the tail motor that is a cn12xc.

Lift,

Cyclic rate with H2 blades is great. Very fast. Not sure if would be quite as quick with woodies, but try and see if you like it.

I managed to get some video on the weekend. Nothing really exciting, as I was using borrowed blades and it was a little windy. Already brocken one set......

Vid will be posted once its edited.

Regards
Jamie

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06-06-2004 07:36 PM  13 years agoPost 35
wedge

rrElite Veteran

Victoria BC, Canada

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Is the CN 12xc a GWS motor, and where do I get it from.


Thanks

Will

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06-06-2004 07:41 PM  13 years agoPost 36
wedge

rrElite Veteran

Victoria BC, Canada

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I found a GWS CN12-R-XC, is this it.


Will

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06-06-2004 08:26 PM  13 years agoPost 37
russm8

rrNovice

UK, Cornwall

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Yes thats the one wedge.
It what i use for 3 cells lipo.

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06-06-2004 09:24 PM  13 years agoPost 38
pet_heli

rrNovice

Portland, Oregon

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Where'd you find it wedge?

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e-
Century Radikal E640 - Swift 16 NX
› CP Hummer goes 3D pt2
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