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500 Class Electric Helicopters 500 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar. |
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10-21-2016, 11:23 AM | #1 (permalink) |
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Join Date: Jul 2012
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500 Rebuild to 500Pro, help a guy out!
Hi everyone, I crashed my 500and decided to rebuild it as a 500PRO. Everything is going perfect apart from one issue. My auto-rotation gear and tail drive gear ARE NOT meshing. Everything is sitting right, but I have a 1-2mm gap between them. I have been trying to see if I need a bigger auto-rotation gear (diameter) or a bigger tail drive gear (also, bigger diameter). The manuals for both heli's only show teeth count and the pics are..well.....you know, not always super helpful. Online options don't give out many specs that allow me to tell each unit apart from the other. I have a sweet pic of this issue too, but can't post it???? OH WELL let me know if you have any knowledge on this.
Thank you HeliFreaks! The Big Guy |
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10-21-2016, 05:14 PM | #2 (permalink) |
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Join Date: Sep 2011
Location: Austin, Texas
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There may be an answer here:
T-REX 500E Super Combo KX017014A Main drive/Tail drive: Drive Gear Ratio:1:12.46:4.68 T-REX 500E PRO Super Combo KX017015 Main drive/Tail drive: Drive Gear Ratio: 1:11.17:4.03 T-REX 500PRO DFC Super Combo RH50E01X Main drive/Tail drive: Drive Gear Ratio: 1:11.17:4.03
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P 700 EVO, XLP Nimbus 550, P 380 EVO, Futaba ,YGE-T, neXt and Heli-X Loud, sudden noises in a helicopter, WILL get your undivided attention |
10-22-2016, 10:14 AM | #3 (permalink) |
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Join Date: Sep 2009
Location: San Diego
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Sounds like you have an old ( pre mod0.6 ) autorotation gear. The current spec is mod0.6 with 145 teeth on the auto gear. I've had this issue on my 550 and 600 when I order the wrong mod. I'd just order a new auto gear, and match it to the tail drive gear mod that you are installing.
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Specter 700, Protos 700 Gasser, XLPower 550, Protos 380 - Jeti DS14 Citizen - #202 |
10-22-2016, 10:29 AM | #4 (permalink) |
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sounds like you have the 31t tail drive gear, and you need the 36 tooth for the pro set up.
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10-22-2016, 11:10 AM | #5 (permalink) |
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Thread Starter
Join Date: Jul 2012
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Thank you so much guys!
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10-22-2016, 12:58 PM | #6 (permalink) |
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Join Date: Dec 2014
Location: always windy on the east coast
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if you can use the 31t it would be better for tail authority. it speeds up the tail..so use the old 31t and auto gear and have better tail holding. for the pro they increased headspeed and decreased tailspeed.
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a bunch of helis... now all vcontrol and neo..finally :lol |
10-22-2016, 02:04 PM | #7 (permalink) |
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Join Date: Nov 2009
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This /\, you bought the pro autorotation gear. Want 4.7 tail ratio get the original auto, want the 4.0 ratio get the 36 TT front gear. Pro - L and uses it. Less tail vibes but requires higher head speed for the tail to hold
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