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Home✈️Aircraft🚁Helicoptere-MikadoOther › Logo 14 Tail Glitch
09-09-2006 04:28 PM  14 years ago
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cebc7

rrApprentice

Panamá, Rep. de Panamá

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Logo 14 Tail Glitch
Hope you could help me on this. Every time I hover my heli, it has a glitch with a clock wise tendency movement so I have to continously correct the tail. I already check the gyro gain with no success. Also every time I fly I think the motor quits for a fraction of second 2 to 3 times per flight specially when accelerating and then continues its normal operating. Can you tell me what is happening. I'm new on electrics and my logo is almost new. Here is my configuration.

Motor: tango 45-06
ESC: Jazz 55-10-32
Pinion: 11T
Gyro: 401/9254
Battery: 10s2p TP 4000

thanks
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09-09-2006 04:34 PM  14 years ago
jpalmer

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Meadville, PA

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I have the same ESC and it will seem to quite for a fraction of a second when it reaches the governed head speed after spooling up, of course if it is in the governor mode. That is the only time this should occur. Joe
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09-09-2006 05:15 PM  14 years ago
cebc7

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Panamá, Rep. de Panamá

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It happens 2 to 3 times per flight and I have no governor installed. I've read all the instructions and haven't seen any gov. mode. Could you explain.

Thanks
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09-09-2006 06:11 PM  14 years ago
jpalmer

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Meadville, PA

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The governor is in the Jazz. It should be programmed to Mode 4 (heli mode). Then the numbers in your throttle curve will control the head speed. On mine, 80 in the throttle curve equals 1750 RPM's. So I have all 80's in the throttle curve to maintain the same head speed no matter where the collective stick is. Of course you will have to progam some way to stop/start the engine. This can be done with a 0 at P1 (bottom stick) or use the idle-up throttle curves and through the switch to start the motor. I have all zero's in the normal throttle curve, which is where I have the switch to plug in the battery. Then if I bump the collective, the engine will not start. I then move the idle-up switch to idle-up 1 where I have all 80's, which starts the engine. After I land, I put the switch back to normal to stop the engine (the engine will stop no matter where the collective is because that throttle curve is all zeros's). Of course if you use an idle-up to start the engine and fly, you will need your pitch curve entered into that condition.
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09-09-2006 06:14 PM  14 years ago
comet

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Neuilly sur Seine, Fr

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gov mode is "heli mode"
this features the ability to maintain a constant headspeed, no matter the pitch.
The esc will send the adapted current to the motor, as it's constantly "dialoging" with the motor.
For a given headspeed, when pitch increases, current increases.

You can set this headspeed with pinion tooth count and/or throttle curve: first point@O%, other points set for desired heaspeed. probably try first 85% in your case.
VT "slow&low"
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09-09-2006 06:23 PM  14 years ago
RussD

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UK

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Hi cebc7,

If the glitch is tail orientated... then it could be a static build up in the tail drive belt. You can test for this with a Digital Volt Meter, by resting one probe to the tail out put shaft and the other to the motor casing and spinning the head fast. Or simply try spraying the tail belt with some dedicated anti-static spray (Furnitire polish with anti-static additive can be used in desperation) and see if it improves? If it does, condider earthing the tail output bearing to boom and boom to motor.

Hope this helps...

RussD.
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09-09-2006 07:01 PM  14 years ago
cebc7

rrApprentice

Panamá, Rep. de Panamá

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JPalmer. You mean the motor wont have a violent start even if you have 80% just from the beggining?? I programmed my ESC with soft start. Does it applies to Idle up1 too or am I missing something.

Thanks
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09-09-2006 09:04 PM  14 years ago
jpalmer

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Meadville, PA

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In Mode 4 (heli mode) a soft start is built into the Jazz. It will spool up slowly whether you bring the stick up to start the motor from a P1 of 0% or throw a switch which takes the Jazz directly to full head speed. In other words, it will not start violently no matter how power is first applied.
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