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Inverse · 01-31-2013, 01:05 AM

Just spinning my Protos over by hand and I can hear a mild ticking noise somewhere near the boom block, also, the belt appears to be not running centrally on the tail pulley, any suggestions?

rojack · 01-31-2013, 01:40 AM

Tick typically gear tooth. Sloppy belt? maybe not tight enough ?

rossk · 01-31-2013, 02:10 AM

Nick up the boom block bolts.
Put some oil on the pulley bearings.
Pulley belt pulleys out, check bearings(if bothered).

Inverse · 01-31-2013, 02:50 AM

Cheers guys, I'll give those things a try.
One thing I never really figured out on the Protos was how tight do I want my belt?

rossk · 01-31-2013, 06:58 AM

I run mine reasonably tight, I've had a few belts come off, so I keep them a bit tighter now and so far haven't had a problem.
Mini Protos can be run a lot looser in comparison, never had one of them come off

crickr1 · 01-31-2013, 07:28 AM

I had same problem with mine and my belt was not tracking properly.
Found sloppy bearings in idler pulley. Usually a tic on Protos is a bearing going bad since there is no gear mesh. Either tail pulley or tail support box idlers.

Bladefx · 01-31-2013, 07:59 AM

I thought that sound is normal when turned by hand. it is the belt meshing on the main gear.
change your belt if it bothers you

as far as tension is concerned too tight is much worse than loose

it should be only tight enough to stop the belt from slipping, start with the motor then the tail

tat2spyder · 01-31-2013, 08:23 AM

also make sure you dont have any extra twists on the belt. it should only rotate 90* inside the boom.

alexf1852 · 01-31-2013, 08:44 AM

The harder (lots of cyclic in maneuvers) you fly, the tighter the belt needs to be. Otherwise you will get belt skipping and lots of belt dust. I used to follow the 2-3mm gap recommendation by MSH. But as my flying progressed, I could hear the belt skip during some moves. So I tightened it some more (probably 1mm gap) and no more belt skipping.

Dr. M · 01-31-2013, 10:53 AM

Check your OWB inside the pinion too. That one also gets loud when it's about to fail.

mattmezz · 01-31-2013, 01:05 PM

Make sure you don’t have an extra twist in the belt inside the boom. Also, when you tighten the belt you have to pull tension in two directions with motor and the boom. For example, if you have too much tension on the boom side and not enough on the motor side then the belt teeth won’t line up correctly on the main gear.

01-31-2013, 01:05 AM	#1 (permalink)
Inverse Registered Users My HF Map location Join Date: Jan 2010	"Tick" in drivetrain? Just spinning my Protos over by hand and I can hear a mild ticking noise somewhere near the boom block, also, the belt appears to be not running centrally on the tail pulley, any suggestions? __________________ Compass 3D+ - OS55 Hyper/Hatori/Vbar Atom 500 Tarot 450 Pro - AR7200BX Spektrum DX8

01-31-2013, 01:40 AM	#2 (permalink)
rojack Registered Users Join Date: Apr 2010	Tick typically gear tooth. Sloppy belt? maybe not tight enough ? __________________

01-31-2013, 02:10 AM	#3 (permalink)
rossk Registered Users Join Date: Mar 2012	"Tick" in drivetrain? Nick up the boom block bolts. Put some oil on the pulley bearings. Pulley belt pulleys out, check bearings(if bothered). __________________ [B]TT E820 - Kosmik 200, Scorp 5035 TT G4.1(x2) - OS 91 3D Speed, Hatori MSH Brains + JETI DS-16

01-31-2013, 02:50 AM	#4 (permalink)
Inverse Registered Users Thread Starter My HF Map location Join Date: Jan 2010	"Tick" in drivetrain? Cheers guys, I'll give those things a try. One thing I never really figured out on the Protos was how tight do I want my belt? __________________ Compass 3D+ - OS55 Hyper/Hatori/Vbar Atom 500 Tarot 450 Pro - AR7200BX Spektrum DX8

01-31-2013, 06:58 AM	#5 (permalink)
rossk Registered Users Join Date: Mar 2012	"Tick" in drivetrain? I run mine reasonably tight, I've had a few belts come off, so I keep them a bit tighter now and so far haven't had a problem. Mini Protos can be run a lot looser in comparison, never had one of them come off __________________ [B]TT E820 - Kosmik 200, Scorp 5035 TT G4.1(x2) - OS 91 3D Speed, Hatori MSH Brains + JETI DS-16

01-31-2013, 07:28 AM	#6 (permalink)
crickr1 Registered Users Join Date: May 2011 Location: New Jersey	I had same problem with mine and my belt was not tracking properly. Found sloppy bearings in idler pulley. Usually a tic on Protos is a bearing going bad since there is no gear mesh. Either tail pulley or tail support box idlers. __________________ Rick, Team pilot , EGODRIFT, KST, Helidirect, Lynx/Oxy

01-31-2013, 07:59 AM	#7 (permalink)
Bladefx Registered Users Join Date: Apr 2011	I thought that sound is normal when turned by hand. it is the belt meshing on the main gear. change your belt if it bothers you as far as tension is concerned too tight is much worse than loose it should be only tight enough to stop the belt from slipping, start with the motor then the tail __________________ Spending time, Paying attention

01-31-2013, 08:23 AM	#8 (permalink)
tat2spyder Registered Users Join Date: Sep 2012	also make sure you dont have any extra twists on the belt. it should only rotate 90* inside the boom. __________________ I'd rather build 'em than fly 'em

01-31-2013, 08:44 AM	#9 (permalink)
alexf1852 Registered Users My HF Map location Join Date: Dec 2009	The harder (lots of cyclic in maneuvers) you fly, the tighter the belt needs to be. Otherwise you will get belt skipping and lots of belt dust. I used to follow the 2-3mm gap recommendation by MSH. But as my flying progressed, I could hear the belt skip during some moves. So I tightened it some more (probably 1mm gap) and no more belt skipping. __________________ MSH Protos 500, SAB 630

01-31-2013, 10:53 AM	#10 (permalink)
Dr. M Registered Users My HF Map location Join Date: Jun 2011	Check your OWB inside the pinion too. That one also gets loud when it's about to fail. __________________ CopterX 450 Black Angel FBL "Night Rig" \| ZYX v4.0 PRÔTOS 500 FBL "Sky Whip" \| Robird G31 Audacity P6 FBL "Phoenix" \| MSH Brain \| 12s Goblin Speed \| iKon

01-31-2013, 01:05 PM	#11 (permalink)
mattmezz Registered Users Join Date: Jan 2011	Make sure you don’t have an extra twist in the belt inside the boom. Also, when you tighten the belt you have to pull tension in two directions with motor and the boom. For example, if you have too much tension on the boom side and not enough on the motor side then the belt teeth won’t line up correctly on the main gear.

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