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Goblin 770 › 770 main gear. What would you choose?
04-13-2014 10:12 PM  4 years agoPost 1
Dan Minick

rrKey Veteran

Columbus, WI

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Hi there, shredded my main gear on my 770 flying today. I tried 2250 HS on a 14s setup. Went like a banshee for a couple minutes then, POOF, it disintegrated. Surprising considering I still run the small drive belt.

Should I go with the Lynx delrin gear or the SAB metal main and pinion?

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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04-14-2014 02:34 PM  4 years agoPost 2
Locktite

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N.J

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I would lower that head speed.. No need for it to be so high. I would recommend the SAB steel gear and pinion setup..I am down to 1650, 1850 and 1900 on my 770 and it is more than enough for hard 3D

Synergy 766 - SAB Black Thunder 700x2- Black Nitro 650- Align 700X/700N DFC SAB 500 Sport

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04-14-2014 04:57 PM  4 years agoPost 3
Dan Minick

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Columbus, WI

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I realize that HS is over the top. I was just playing around with it and I am not surprised the gear failed.

My concern with the metal main and pinion is noise. Do you by chance run one?

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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04-18-2014 08:24 PM  4 years agoPost 4
Luvmyhelis

rrApprentice

Spokane, Washington. USA

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If you are going to be doing this kind of stuff, the delrin gear won't fare much better.
And yes, the metal gear is noisy. They whine pretty loudly. Especially during break in. I quit loosing stock gears when I started running Lighting wax lube however. Just so you know, I have run mine up to 2300 when running the 770 blades and up to 2200 with my SHS stretched 813 a few times. But now I fly at 1900 max.

Old cranky heli builder

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04-19-2014 12:07 AM  4 years agoPost 5
Dan Minick

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Columbus, WI

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thanks for the reply guys, decided im going to try a lynx so its not so noisy, if it ever goes at least the cost is half for only the outer ring.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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