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HomeAircraftHelicopterThunder TigerRAPTOR 90 News  G4 nitro custom gear ratios
01-01-2014 12:19 AM  4 years agoPost 1
John Benario


Las Vegas

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After taking a little time off from my helicopters to get married, buy a CNC mill, and learn how to use it (not necessarily in that order!) I am getting back into my helicopters. With the CNC mill I can now offer a 115 tooth main gear for the G4, for a close to ideal ratio of 8.21.

With the manual mill it was impossible for me to make gears on a production basis, but with a CNC mill I can make the gear blanks now in very short order. Here are the first 4 I made, with teeth cut on one so far.

I can make gears for 7.79, 7.86, 8.0, 8.07, 8.14 as well, all drop in fits, no modifications required.

the 3D performance with the 8.21 with the OS 90 is much improved over the 7.92.

Email me if interested.

John Benario

Team highest quality
Futaba radios
Cool Power fuel
John's Ultimate building school

01-01-2014 12:35 AM  4 years agoPost 2
Lee O'Dell


Gibsonville, North Carolina

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Very very nice work!

...keep flying it 'till the last part stops moving

03-18-2014 10:36 PM  4 years agoPost 3


Encino, CA

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Just received and installed the 115T gear on my G4 with a brand new OS105HZR DRS (Hatori pipe) with only a couple of flights on the motor, so it is still in the early break-in period.

Gear / machining quality is outstanding. Main gear interlocks nicely with the pinion and both spin freely.

At this early stage of break-in I'm not banging the G4 around just yet, but the gear is working and holding fantastically. There is no unusual gear noise. To the contrary, at the LA3D event this weekend, a number of pilots commented on how quiet the gear train is on the heli.

I'll update my comments after flying another couple of gallons and pushing the heli harder.

So far, I consider this custom CNC main gear a great investment!


Team Thunder Tiger / Team Futaba / Citizen#162

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