SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old May 01, 2011, 06:12 PM
Redjestird Youser
SidewaysLS4's Avatar
Joined Jan 2009
3,878 Posts
Discussion
Quieting down a T600/T550 scaler with a Helical main gear

I put the Align T600 Helical main gear on my T550 Jet Ranger to see if I could quiet things down a bit. It seems to have in the main gear noise department, but the TT tail is another noise maker, lol. Anyway, here's some sound comparisons between the 2 gear types. Listening in person, I'd say it is worthwhile converting over, smoother sounding. Specs are straight gear-170T/17T, helical gear-188T/18T, headspeed 1700rpm on both. Pardon the crappy looking flying, too much wind lately, lol.


T600 Straight and Helical gear comparison.wmv (1 min 36 sec)
SidewaysLS4 is offline Find More Posts by SidewaysLS4
Reply With Quote
Sign up now
to remove ads between posts
Old May 01, 2011, 10:58 PM
Registered User
Lake Zurich, IL
Joined Jan 2008
5,654 Posts
Not much difference to me .... may be I need a hearing test.
sidneyw is offline Find More Posts by sidneyw
Site Sponsor
Reply With Quote
Old May 02, 2011, 06:00 AM
Redjestird Youser
SidewaysLS4's Avatar
Joined Jan 2009
3,878 Posts
I know, in person you can pick up the sound difference better. The TT gears are pretty noisy, but the screech of the main gear is reduced. The slant gear is a smaller modulus which helps, and the angle cut assumably helps also. Converting to a belt tail I would imagine would really make things quiet, but the TT sure is simple to assemble...loosen 2 screws and the whole tail comes off . One thing I did notice quickly after converting was tail rotor/fuselage noise. I dont think I'll try to extend that tail shaft, but I'll look into possibly damping some fuselage resonance. The tail noise was quickly noticable directly from the rear spooling up the first time with the slant gear for some reason
SidewaysLS4 is offline Find More Posts by SidewaysLS4
Last edited by SidewaysLS4; May 02, 2011 at 06:07 AM.
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Help! Confusion with new main gear upgrades for V4. vandino Skyartec 17 Apr 09, 2012 12:50 AM
Sold ** SOLD ** Trex 250 Main Gear with One-way (5 packs, NIP) exit44rc Aircraft - Electric - Helis (FS/W) 1 Mar 24, 2011 08:06 AM
For Sale Align 600L motor with 11T helical pinion and 188T helical main gear ddierking Aircraft - Electric - Power Systems (FS/W) 2 Jul 13, 2010 08:59 PM
Discussion Quieting down a CX2 boren Coaxial Helicopters 11 Dec 13, 2007 09:07 PM
For Sale Helical main gear for Trex 600 CorvetteL98 Aircraft - Electric - Helis (FS/W) 0 Oct 24, 2007 05:39 AM