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Thunder Raptor 90/G4 Thunder Tiger Raptor 90/G4 Helicopters


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Old 01-16-2014, 06:32 AM   #1 (permalink)
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Default 115T main gear

Hi all,

Does the latest 115T main gear fit the Raptor G4 (not 4.1)? I really can not find any answers on the Internet.

Thank you,
Bat
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Old 01-16-2014, 08:15 AM   #2 (permalink)
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Yes
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Old 01-16-2014, 10:04 PM   #3 (permalink)
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Thank you.
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Old 01-16-2014, 10:16 PM   #4 (permalink)
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no it does not, you cant move the motor back, i bought one for my e720, i also have a G4 nitro, but i bought a custom made one from John Benario, he makes gears with a non standard gear widths (115t with same diameter) tt's gear is a standard cut gear, meaning it has a larger diameter

http://rc.runryder.com/helicopter/t755640p1/
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Old 01-16-2014, 10:23 PM   #5 (permalink)
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If it fits, why do they make special mention that it the frame has been updated to support 115T main gear?

I only have updated frames, never had an old one, don't know exactly what the difference is.
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Old 01-16-2014, 10:26 PM   #6 (permalink)
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notice slotted nitro motor mount holes, and fan mounting holes, G4.1 on right
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Old 01-17-2014, 02:50 AM   #7 (permalink)
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No it won't fit

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Old 01-17-2014, 08:51 AM   #8 (permalink)
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Oops.. My apologies. The 115T won't fit the G4. Fits the G4.1. Better work on my reading skills.

Dave
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Old 01-17-2014, 02:55 PM   #9 (permalink)
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Seems like it would be pretty easy to slot the frames. Wouldn't you want to move the motor, clutch, and shroud forward?
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Old 01-18-2014, 08:49 AM   #10 (permalink)
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I ordered one hope to have it soon. I am goin to strip down my g4 today to start the eval of how to make it fit. Primary concern area is the front of the main frames under the radio tray. not much meat there to slot the frames to move the cooling shroud forward. Other suspect area might be the front skid mount if moving the shroud is required. Any one know the gear size difference from 111 to 115? The other frame areas should not be an issue to slot in my opinion. Time will tell.

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Old 01-18-2014, 11:41 AM   #11 (permalink)
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I just built a G4.1. The frames were only slotted about an eighth of an inch so you don't need much.

Edit: I pulled a frame screw from one of the slotted holes. They are only slotted approximately 3mm, in fact they are not slotted at all but are double drilled.
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Old 01-18-2014, 11:40 PM   #12 (permalink)
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Good left

Thanks for that pic that helps a lot and verified my suspicious that it would not take much.

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Old 01-19-2014, 06:20 AM   #13 (permalink)
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Default Re: 115T main gear

That would work. The g4.1 and e820 use the same template as the g4 and e720

Differences being the main gear and bell cranks fixings

You can modify your frames to use the new bell cranks as well. But why bother :-)

I might have to modify my g4 so I can use the 115 with my 105
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Old 01-19-2014, 07:25 AM   #14 (permalink)
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Agree on the bell cranks, but changing the motor gear ratio for a nitro. Big.

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Old 01-19-2014, 12:18 PM   #15 (permalink)
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I think you could use the new bellcranks without modifying the frames. The G4.1 frames are countersunk at the inside of the frames but I can't see why. Seems like you could just use regular socket heads instead of countersunk bolts. There are no clearance issues. I'll look at a buddy's G4 later today and try to confirm this.

Of course I can understand the concept of "why fix it, if its not broken".
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Old 03-04-2014, 05:43 PM   #16 (permalink)
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Navyraptor / Tim Tripoli: Does the Benario CNC 115T gear drop in to the standard G4 frames or are there modifications still required?

Just ordered one.

Thanks.
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Old 03-13-2014, 12:08 AM   #17 (permalink)
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Drop in fit on the Benario custom CNC 115T main gear for G4. Very nicely machined Delrin gear. Seems to be a very smooth fit with pinion.

Flight testing this weekend with new OS105HZR. #5 initial break-in flights last weekend on stock 111T main gear for comparison.
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Old 06-05-2014, 10:09 PM   #18 (permalink)
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Flight report on Benario Custom CNC 115T "drop in" for stock G4/OS105. After 2 full months of flying, main gear is running awesome. Love the lower headspeed/higher torque. No signs of stress or wear after about 50 flights.
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Old 06-10-2014, 12:37 PM   #19 (permalink)
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Quote:
Originally Posted by Glenn Goodlett View Post
I think you could use the new bellcranks without modifying the frames. The G4.1 frames are countersunk at the inside of the frames but I can't see why. Seems like you could just use regular socket heads instead of countersunk bolts. There are no clearance issues. I'll look at a buddy's G4 later today and try to confirm this.

Of course I can understand the concept of "why fix it, if its not broken".
The single piece motor mount/lower bearing support of the E820 goes in and out a lot easier with no dissasembly whereas on the previous version the bellcrank mounts would interfere so you had to remove more "stuff" to get the motor mount in/out. Same frames used on several versions of the machine so they all changed at the same time.
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Old 06-11-2014, 12:23 PM   #20 (permalink)
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Does anyone know where I could get a 115 tooth main gear? Tower is out of stock until July.
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