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06-02-2004 10:43 AM  13 years agoPost 1
Gyronut

rrProfessor

Martinsville In.

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Hi Fella's

I have a problem with my H2 I have been trying to solve for some time but have not had any success.

During a hover or FF the model has a strong tendancy to drop out of the air totally unexpected, upon investigation I found that there are glitches in pitch that force the blades to go neg and throwing the thing to the ground. You can actually hear the blade pitch change.

My setup is as follows but I have replaced everything more than once and has made no impact.

JR549
MS044
HS50's
P10
2015-4100
3cell Lipo
JR8103

I also have to mention that I use this same xmtr for 5 other heli models and no probelms encountered.

One interesting note: When the model is static there is no glitching....or at least none that I have observed......

I have rebuilt this bird more than once and have taken great care in routing wires and moving the P10 to the rear behind the battery.

The antenna does not touch any of the carbon frame and is insulated as well as the rcvr.
Range checks reveal nothing....

I am starting think this model is cursed.

Thank you all for your help

Rick

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06-02-2004 02:20 PM  13 years agoPost 2
mattijs

rrApprentice

Keerbergen Belgium

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I had the same problem a couple of days ago when i remounted the antenna (drinking straw with normal length antenna) a bit closer to the PH10.

How long are the wires connecting the motor to the controller. If they are long they themselfes act as little antennas throwing around harmfull radiation. The radiation they send is proportional to the current going through the wires. I only had glitches if i made the motor work hard for example when i was going down hard and than pitched up again. Very annoying to say the least!!!

So make sure the wires are as short as possible, preferably only a couple centimeters and make sure the antenna is furthest away from the controller + motor as possible. Another thing you could do if your just not comfortable moving things untill they work is go for a more expensive RX. I don't know wich one you have but supposedly the BERG DSP line is worth looking into. They send the signals through a digital signal processor much like stand alone channel guards do but the BERG does it for all the channels.

I am sure your model isn't cursed Interference can be a pain to solve though especially because there isn't really a way to see it unless you have the proper tools (i mean see the radiation)

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06-02-2004 03:28 PM  13 years agoPost 3
Gyronut

rrProfessor

Martinsville In.

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Thanx mattijs

I do have the ant mounted at least 4 inches away from the speed controller and the controller wires are as short as they can be.

I failed to mention that my xmtr antenna is a rubber ducky but I have used this for many years without any problems.

Thanx for your help

Rick

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06-02-2004 04:11 PM  13 years agoPost 4
cyhyam

rrApprentice

So. California

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Move the P10 as far from the rx as possible. Sometimes wrapping it in aluminum foil will prove that it is the source of interference.


Walt

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06-02-2004 04:44 PM  13 years agoPost 5
Gyronut

rrProfessor

Martinsville In.

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Thanx Walt

I will give that a try this evening. I currently have the P10 mounted about 4 inches away on the backside of the chassis.

Rick

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06-02-2004 08:26 PM  13 years agoPost 6
cyhyam

rrApprentice

So. California

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At 4 inches it should pose no problem, How close is the RX to the motor and gyro?


Walt

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06-02-2004 08:41 PM  13 years agoPost 7
Gyronut

rrProfessor

Martinsville In.

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Hi Walt

The rcvr is mounted on the forward carbon fuselage plate with foam rubber insulator.
The antenna is mounted to the underside of this same plate with foam rubber.

Of course the motor is mounted very close to both of these items.

The gyro is mounted on the rear of the chassis where the tail boom attaches to the frame.

I still think the model is cursed.............I have 2 other Hornets and have never had a lick of trouble from any of them.

Thanx for all your help

Rick

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06-03-2004 02:11 AM  13 years agoPost 8
Gyronut

rrProfessor

Martinsville In.

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Hey Everyone

Solved my problem, or at least covered it up.

Installed my JR649 SPCM rcvr no more glitches, at least until the big one comes along.

The Crash Mode I chose was zero pitch should it go into failsafe.

Thanx to everyone who responded.


Rick

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