Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Century


Century Century Helicopters Support


Reply
 
Thread Tools Display Modes
Old 07-11-2012, 09:43 PM   #1
phoenixheli
Registered Users
 
Posts: 1,153
 

Join Date: Jul 2009
Location: Apollo, PA
Default E640 Helical Gearing

Has anyone flown an e640 with a helical gear set? If so, was it worth the reduction in gear noise or not?

My objective is to reduce gear whine and hear more of the rotors as possible. I've only been able to find a helical gear set for the main and pinion but nothing for the tail drive gears.
__________________
CPv3, Axe 400, Exi 450, Franken Heli 450, mCPx, Swift 16, Blade 450x Thumbs Only!
phoenixheli is offline        Reply With Quote
Old 07-12-2012, 11:22 AM   #2
codfish124
 
My HF Map location
Join Date: Jan 2010
Location: US colorado lakewood
Default

I don't think they make it for the tail and i never flew mine with the stock gear so I don't know about a change in noise the helical gears are for higher power systems is what I was told.. if you look up my videos you might beable to make a noise compareison
codfish124 is offline        Reply With Quote
Old 07-14-2012, 01:17 AM   #3
Dennis P
Registered Users
 
Posts: 1,201
 
My HF Map location
Join Date: Aug 2010
Location: Alberta , Canada
Default

I have only flown mine with the stock straight cut gears and the gear noise is not bad at all.No problem hearing the rotor blades at all.I am going to be doing a motor swap in the near future and will be changing out the gears . I may be able to tell you the difference then ?
__________________
Synergy E5s / AleeS Rush 700 / Synergy N5CTT
/ Trex 450L 6s / Leap 3D Quad
Rotor Tech / Rail Blades / Skookum / WR

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Dennis P is offline        Reply With Quote
Old 07-14-2012, 11:15 PM   #4
phoenixheli
Registered Users
 
Posts: 1,153
Thread Starter Thread Starter
 

Join Date: Jul 2009
Location: Apollo, PA
Default

Thanks for the input. I've been on a mission the past few months to find power train components and combinations that will keep unwanted noise down in an e640 without heavy modifications.

The best setup I have seen in any heli uses a belt drive between the motor and main gear combined with a directly driven belt to the tail. There's no gear to gear contact of any kind and all you hear is the motor and lots or rotor slapping the wind. However, it wasn't in an e640. I guess the helical main gear and pinion is a start along with a quiet motor.

I was able to find a video comparing the sound of straight cut vs helical in a t600. Seems to make some difference.


The straight gear flights almost remind me of the sound of my ol swift 16.
__________________
CPv3, Axe 400, Exi 450, Franken Heli 450, mCPx, Swift 16, Blade 450x Thumbs Only!
phoenixheli is offline        Reply With Quote
Old 07-15-2012, 03:02 AM   #5
Furious Predator
Registered Users
 
My HF Map location
Join Date: Mar 2007
Location: Kitchener, Ontario, Canada
Default

Century makes Helical metal tail gears for the Raven/Hawk/NX50 and the Predator. One of those sets might be able to retrofit to the 640's....or they may come out with some soon. I hope so, they are great gears!
__________________
Shawn
Team Leisure Tech
Sponsored by VISA
Furious Predator is offline        Reply With Quote
Old 07-15-2012, 07:42 PM   #6
codfish124
 
My HF Map location
Join Date: Jan 2010
Location: US colorado lakewood
Default

They are working on metal gears for the tail on the E640 its not for noise and will probably make more noise
codfish124 is offline        Reply With Quote
Old 07-16-2012, 01:58 AM   #7
Furious Predator
Registered Users
 
My HF Map location
Join Date: Mar 2007
Location: Kitchener, Ontario, Canada
Default

From my experience with the metal helical tail gears on the 50 and 90, the tail is pretty quiet. You hear the main&crown gears.

This of course assumes the tail gears are meshed just right. They are much more picky when compared to spur or beveled gears. The metal tail gear upgrade for the 50 comes with very thin washers to dial in the mesh.

If they do come out with an upgrade for the 640's, I would also like to see a closed tail box. I like keeping the metal gears well greased.
__________________
Shawn
Team Leisure Tech
Sponsored by VISA
Furious Predator is offline        Reply With Quote
Old 07-16-2012, 05:12 PM   #8
codfish124
 
My HF Map location
Join Date: Jan 2010
Location: US colorado lakewood
Default

If u want to try the helical stuff for cheap I have a set for 20 I could sell you
codfish124 is offline        Reply With Quote
Old 07-16-2012, 09:02 PM   #9
phoenixheli
Registered Users
 
Posts: 1,153
Thread Starter Thread Starter
 

Join Date: Jul 2009
Location: Apollo, PA
Default

Thanks for the offer, but I don't plan on spending any more money for a while yet. lol. My focus is on getting an xera 4030 3y, then I'll start on helical gearing. I just like to get a good idea on something well in advance.
__________________
CPv3, Axe 400, Exi 450, Franken Heli 450, mCPx, Swift 16, Blade 450x Thumbs Only!
phoenixheli is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Century


Century Century Helicopters Support

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Copyright © 2004-2011 - William James - Helifreak.com