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HelicopterRadio - Servo - Gyro - Gov - Batt › What causes gv-1 to overspead
12-18-2003 04:29 AM  13 years agoPost 1
RHCSKI

Heliman

Newark, DE

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I raptor 50v2 will sometimes overspead with the gv-1. It will overspead
sometimes just flying figure 8's. But the gv-1 will prevent it from overspeading on a hard descent.?? I don't know why the heli will overspead out of the blue. It happens about 2 times every outing.
I try to keep the engine temp between 190 and 200. Main needle
about 1 and few clicks out.
Pitch is -10, 0, +10.
Idle up set at 1750

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12-18-2003 05:06 AM  13 years agoPost 2
HelicopterJohn

Key Veteran

Seffner, Florida (Just East of Tampa, Florida)

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GV-1 Over Speeding

RHCSKI

You might want to check the connections of the wiring where it connects to the sensor. After about 30 flights the white wire on mine broke which caused the governor to turn off and on. The white wire was only holding by a few strands and if I tugged on it a little while the sensor was on TDC in relationship to the magnet and the reading was 98 all the sudden the reading would drop. I re-soldered the wires on the sensor and now everything is fine.

Also, a friend of mine had the black wire break on his GV-1 sensor after a very short period of use. He also had to re-solder his sensor wires.

I just got a new Throttle Jockey Pro and intend to try it on my Raptor 50 in the near future.

Just something you might want to check. Put the sensor on TDC at a 98 reading and tug gently on the wires where it goes into the sensor and watch for any changes in the reading.

OC Bob's Gathering #2 was a Premiere Event. Pictures in my Gallery

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12-18-2003 05:47 AM  13 years agoPost 3
HelicopterJohn

Key Veteran

Seffner, Florida (Just East of Tampa, Florida)

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Sensor Type

CSheets

The issues I spoke of in my post were the OEM Magnetic Sensors from Futaba. I am not sure which sensor "RHCSKI" is using.

OC Bob's Gathering #2 was a Premiere Event. Pictures in my Gallery

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12-18-2003 08:55 AM  13 years agoPost 4
Alistair

Key Veteran

no where land

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the GV-1 will allow the head to overspeed by 50 rpm in vertical or near vertical dives.... you wouldn't even notice 50 revs though.

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12-18-2003 09:27 AM  13 years agoPost 5
Alistair

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no where land

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i had some over-speeding problems for a couple of days once... then it just went away. i never took the time to figure that one out.

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12-18-2003 01:20 PM  13 years agoPost 6
HelicopterJohn

Key Veteran

Seffner, Florida (Just East of Tampa, Florida)

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Throttle Jockey

CSheets

You said:
Throttle Jockey!!!!!!!!!
Yep, I will be installing one in my Raptor 50 V1 sooooon!!!!!!!

OC Bob's Gathering #2 was a Premiere Event. Pictures in my Gallery

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12-18-2003 01:41 PM  13 years agoPost 7
HelicopterJohn

Key Veteran

Seffner, Florida (Just East of Tampa, Florida)

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GV-1 Over Speeding

RHCSKI

One other issue I forgot to mention in my first post had to do with the installation of the GV-1 sensor on my Raptor 50 V1. To install the sensor, I took the motor out of the helicopter. Taking the advice of others on RR about the plastic cases on the GV-1 sensor breaking and thus causing temporary sensor reading failure I put some heat shrink on the case and calibrated the sensor getting the 97% reading.

What I didn't notice was that when I installed the motor into the helicopter there was a slight bind of the heat shrink against the inside of the side frame. After several gallons of fuel I experienced over speeding like the governor was turning off and on by itself. I checked the reading on the sensor and found that it was no longer at 97% but a a lower unacceptable reading. Checking further, I noticed that the bolts that hold the sensor to the mounting plate had slipped causing the sensor to give faulting readings. The cause of this was that the heat shrink rubbing against the inside of the side frame was applying pressure against the sensor and caused it to move. I relieved the inside of the frame a little and readjusted the sensor to attain the proper reading.

Everything worked fine until a couple of flights later when the white wire on the sensor broke as described in the first post. At first I thought it was a sensor alignment problem, but found out it was the electrical connection of the white wire giving me an issue. Not a good flying day! Everything is working o.k. at this time.

I like the idea of the throttle jockey and the faster throttle servos. I will give that a try in the near future.

OC Bob's Gathering #2 was a Premiere Event. Pictures in my Gallery

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12-19-2003 04:26 AM  13 years agoPost 8
RHCSKI

Heliman

Newark, DE

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overspeading

I want to thank everyone for their advice. I checked the wire on
the sensor. It seems to been fine. I'm getting a reading of 97%. I pulled on the wire and the reading dropped to 90%. I think it just move the sensor around in the plastic casing. I atv are set around 100% with 90 degree linkage at 50%. Is it possible my midrange adjustment is
too lean?

Ron

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12-19-2003 02:30 PM  13 years agoPost 9
Alistair

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no where land

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i used heat shrink.. then went 'round again with dental floss and CA

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HelicopterRadio - Servo - Gyro - Gov - Batt › What causes gv-1 to overspead
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