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Ikarus › 2 Piccolo Pro Problems.
12-19-2003 02:32 PM  13 years agoPost 1
Such5

rrApprentice

Grand Haven, Michigan

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First and most important is, that I lose almost all tail authority when my battery gets low. This has caused nearly all the mishaps I've had with my Piccolo. I'm running a picoboard plus with the heading lock module, and the 9 cell Nimh batteries. I know most people are going to say that I should stop flying when the battery gets low, but to be honest there is no real warning. Right about the time I realize that I'm losing power I start to bring the heli down there goes the tail with a slow Piro and usually leads to a Crash! I was running my atv at around 115 on right and left rudder. I'm going to try to bump that up to around 125 and see what that does. I read somewhere that doing this gives you more tail control?
My second problem is a strange and unpredictable blade flutter on spool up. Every once and a while about mid stick or so my blades begin to flutter/ out of track really badly. It only happend once and a while and upon either reducing or increasing throttle/pitch it will go away. Any help with these problems would be greatly appreciated.
Other than these 2 problem I love this heli. Great for the cold winter here in Michigan! I will be looking to go Lipos, Brushless, seperates in the near future but wanted to start out slow and make sure I really like the heli.

Thanks in advance,
Brett Suchecki

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12-23-2003 09:58 PM  13 years agoPost 2
GreggyPoo

rrApprentice

Where it rains all the time

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Some answers

Brett -

To the first problem with loss of tail control when the battery is almost dead - This is actually the case with all of the micros that I've flown that utilize a separate motor for the tail as opposed to having a driven tail. The bad news is that since the Piccoboard pro utilizes a HH gyro (instead of a rate gyro as in the H-Bird, etc.), you don't realize that the mixer is overcompensating for lack of tail control until it's too late. With a rate gyro on a Microelectric heli, you notice the tail start to drift as the battery depletes itself and you have to gradually apply more and more right rudder or right rudder trim to compensate. With the HH, there's not much you can do when there's not enough power left to maintain tail.

No worries, though - There are actually 2 great ways the Piccolo will let you know that the flight battery is near the end of its flight.

1 - You will notice the headspeed gradually decreasing as you induce more drag by increasing the collective to maintain altitude. At some point, you should actually notice that in order to maintain hover you're manually comensating for the decrease in power by increasing throttle/ collective. For example- If you normally hover at half stick on a fresh pack and you're holding 2/3-3/4 stick, it's time to land.

2 - The other way you can tell (my favorite) is watch what the heli is doing. The Piccolo Pro, and other electric collective-pitch helis I've flown have a tendency to "head-bob" or "gyrate" when nearing the end of the flight battery- This is likely due to the decrease in headspeed. Good to watch for it; it's actually kind of cute

Don't mess with your ATV settings to resolve this problem. With a HH gyro the ATV settings will only tell your gyro how quickly to make a singe revolution- The higher the ATV setting the faster your tail will appear to respond to rudder stick input - You would think that increasing the rudder ATV will give you more tail authority, but it's a bit of a double edged sword on an electric motor-driven tail. At a high ATV setting and with a low battery, your gyro will "give up" sooner since it has less available power to make the correction that you're asking for at the speed you're asking it to do it in.

You may try adjusting the mixer on the board instead - I have mine adjusted so that as I begin to spool up the main rotor, the tail motor is running at very high speed - This will force the helicopter (still on the ground) to yaw to the right - As soon as it does, the gyro will sense the tail movement that just occured with no rudder stick input and immediately correct - This actually works the same as revo-mixing in your transmitter - Works pretty well.

Sorry I can't help you on the intermittent tracking problem.

Good luck, and enjoy your piccolo.

Greg

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Ikarus › 2 Piccolo Pro Problems.
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