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Reload this Page Head Speed less than 2100 RPM = new tail pulley


SAB Goblin 630/700/770 SAB Heli Division 630/700/770 - Goblin Helicopters Factory Support


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Old 03-18-2012, 10:22 PM   #1 (permalink)
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Default Head Speed less than 2100 RPM = new tail pulley
Is anyone using the smaller tail pulley H0049-S (26 tooth) for head speed less than 2100 RPM?

Goblin Maual v1.3 page 33
However, if you prefer flying at low/medium speed [< 2100 rpm], for best results we recommend changing the tail pulley for a smaller one to increase tail rotor rpm. In this way, you will have extremely precise tail control even at low RPM. This pulley is available in the upgrade list [H0049-S]
Last edited by gww528; 03-19-2012 at 08:51 AM..
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Old 03-19-2012, 12:16 AM   #2 (permalink)
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I have it, I just haven't installed it yet. I'm having tail wag issues, so I'm gonna install it tomorrow. I will let you know if it helps.
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Old 03-19-2012, 12:55 AM   #3 (permalink)
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I have it, I just haven't installed it yet. I'm having tail wag issues, so I'm gonna install it tomorrow. I will let you know if it helps.
It's going to make the wag worse . See other thread
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Old 03-19-2012, 12:57 AM   #4 (permalink)
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I have it, I just haven't installed it yet. I'm having tail wag issues, so I'm gonna install it tomorrow. I will let you know if it helps.
Thanks Mate, I'll be interested to hear how this smaller z26 tail pulley works as well. Thanks.

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Old 03-19-2012, 01:15 AM   #5 (permalink)
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It's going to make the wag worse . See other thread
Not sure why this would be the case? Could you do us a favour and give us a link to that thread. Thanks Mate.

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Old 03-19-2012, 08:50 AM   #6 (permalink)
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It's going to make the wag worse . See other thread
Did a search & read about the tails & tail pulleys but did not see anyone using the Z26 tail pulley.
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Old 03-19-2012, 11:08 AM   #7 (permalink)
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Not sure why this would be the case? Could you do us a favour and give us a link to that thread. Thanks Mate.

Cheers,
TomC
Was referring to the cross post. If he has a wag due to binding, or ESC Gov, then increasing the speed of the tail blades will make it worse. Encountered this multiple times, have wag, flip into Idle Up, higher head speed = wag worse.

https://www.helifreak.com/showthread.php?t=396708
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Last edited by Mystic3D; 03-19-2012 at 01:34 PM..
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Old 03-19-2012, 01:26 PM   #8 (permalink)
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It's going to make the wag worse . See other thread
What other thread?
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