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HelicopterRadio - Servo - Gyro - Gov - Batt › Throttle Jockey Sensor - Magneto Distance
04-28-2004 12:04 AM  13 years agoPost 1
robverrNovice - Rimforsa, Sweden - My Posts: All  Forum  Topic

Hi,
I am a newcomer in the engine governors world.

How critical is the distance between the sensor and magneto?

Calibrating and setup - no problems, in static bench mode everything works (green light diode in different modes etc.) as it should. When I turn the fan and the magneto passes the sensor the red diode lights up brightly. The distance sensor - magneto is exactly 1mm (0.039").

Yesterday I hovered my heli at a rotor speed 1700 rpm without the TJ engaged. I then tried to engage the TJ, which was set to 1550 rpm following Modelavionics setup charts, and nothing happened. I suspected that I could have set the desired rpm too high so that the TJ could not engage/catch-up, so I tried to get the TJ engaged by ascending rapidly since I know that with this heli the rotor rpm rises approxemately with 200 - 300 rpm (I change to more max.pitch later). No engagement, the rotor speed went up and then down again when I stopped the ascent into hover. I did this several consequent times but no...

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04-28-2004 12:13 AM  13 years agoPost 2
Rick_H

rrKey Veteran

Boulder City, Nevada

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Alot of people have problems with the setup charts. My bet is your TJ RPM is set higher then your current RPM. I would recommend lowering your TJ ATV's then stepping them up until you reach your desired head speed. You will know when the TJ has engaged.

Rick

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04-28-2004 12:22 AM  13 years agoPost 3
robve

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Rimforsa, Sweden

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Thank you for the quick response, Rick_H, I try your suggestion. But the sensor - magneto distance, is 1mm (0.039") OK?

Robert

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04-28-2004 01:03 AM  13 years agoPost 4
George Matthews

rrElite Veteran

N.W. Ohio

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1 mm distance is good. I agree with Rick_H tey setting your ATV's lower to see if you get the TJ to engage.

George Matthews

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05-01-2004 12:14 AM  13 years agoPost 5
robve

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Rimforsa, Sweden

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Now it engages!

Thank you for the advice!

Robert

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HelicopterRadio - Servo - Gyro - Gov - Batt › Throttle Jockey Sensor - Magneto Distance
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