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MSH Protos MSH Protos Helicopter Support Forum |
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11-26-2012, 01:38 PM | #21 (permalink) |
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IMO, the belt can never be centered on both sides of the main pulley because of the twist inside the boom. The starboard side will always ride just slightly higher than the port side. Mine is centered on the port side and rides about 1mm higher on the starboard side of the main pulley. The belt also rides a bit off-center towards the starboard on the tail pulley. All due to the quarter twist...
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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 |
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11-27-2012, 08:43 PM | #22 (permalink) |
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Join Date: Aug 2010
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OK, thanks again Dr M
I used every suggestion and in particular really made the belt extremely tight. I replaced all pulley's and I think I got all adjustments perfect. Flew it today and so far, so good ! Think you are correct about the 1/2 turn of belt in boom. Thanks All Roger |
11-28-2012, 03:28 PM | #23 (permalink) |
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Join Date: Mar 2012
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is some pinging in the tail boom during Tic-tocs and flips normal or is that a sign the belt needs a little more tension? The belt is snug but not tight and during some tic tocs and other 3d i can hear some slight pinging and not sure if this needs to be addressed or not.
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11-28-2012, 05:05 PM | #24 (permalink) |
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I'd say pinging means loose belt, but if it does not slip in those moves there's little more you can do to it to make it slip, so I'd be inclined to leave it alone.
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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 |
12-15-2012, 01:01 AM | #25 (permalink) |
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Join Date: Mar 2012
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After replacing:
Pinion Main gear Belt The belt came off again! I went to put it back on and then I found this It's a bit hard to see but, the guide was working its way thru the plastic, it was on a big angle that would shoot the belt straight off the pinion. I think it was caused by a couple of things, too tighter belt and too hotter motor and maybe bad bearings, they are not very good now. I'm happy I have found something that explains it...
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[B]TT E820 - Kosmik 200, Scorp 5035 TT G4.1(x2) - OS 91 3D Speed, Hatori MSH Brains + JETI DS-16 |
12-15-2012, 01:48 AM | #26 (permalink) |
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That's the result of a bad bearing...
1. bearing seizes 2. pulley and bearing spins on pulley shaft 3. pulley shaft gets hot 4. hot pulley shaft melts plastic 5. melted plastic can't hold pulley shaft 6. pulley pops out with belt
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MSH Protos 500, SAB 630 |
12-16-2012, 03:54 AM | #27 (permalink) | |
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Join Date: Mar 2012
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Quote:
I did it again today! This time on another p500, the beast. Melted the mount and the pulley let go, this time it went for a ride thru the pinion. Both had boca ceramic/stainless hybrid bearings, first had 180 flights, second had 49. I temp checked the second heli after each flight today and it was not hot, 8th pack it squeeled and the belt came off. So that makes 2 in 2 days, both days were over 30 deg c and I was pushing hard.
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[B]TT E820 - Kosmik 200, Scorp 5035 TT G4.1(x2) - OS 91 3D Speed, Hatori MSH Brains + JETI DS-16 |
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12-16-2012, 09:07 AM | #28 (permalink) |
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Stick to stock bearings.
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MSH Protos 500, SAB 630 |
12-16-2012, 12:43 PM | #30 (permalink) |
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Join Date: Jun 2009
Location: Edmonton, Alberta, Canada
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Why plastic pulleys ? I have metal one on the used Protos 500 I am rebuiling. I am thinking I will take it apart again and replace the bearings and pulleys.
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soXos Strike 7.1 L, Diabolo 600, Logo 600, Kraken 580, Protos 380 Evo |
12-16-2012, 02:49 PM | #31 (permalink) |
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You gotta oil those tiny bearings in the idler pulleys religiously, every 5-10 flights. A tiny drop of oil on each side makes a huge difference.
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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 |
12-16-2012, 03:55 PM | #32 (permalink) |
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Join Date: Jun 2009
Location: Edmonton, Alberta, Canada
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What is the advantage if any of the alum pulleys ?
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soXos Strike 7.1 L, Diabolo 600, Logo 600, Kraken 580, Protos 380 Evo |
12-16-2012, 06:11 PM | #33 (permalink) |
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Join Date: Apr 2011
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I cant think of any, people actually seem to have more problems with them. Though occasionally after many flights the flanges on the plastic ones can break off.
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12-16-2012, 07:11 PM | #34 (permalink) |
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I can't really put it in words, but I've tried multiple combinations and found the best performance on my machine with 2 alu pulleys and 2 plastic ones. The plastic pair goes in front of the boom and alu next to the motor and at the tail pulley...
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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 |
12-16-2012, 10:38 PM | #35 (permalink) | |
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Join Date: Jun 2009
Location: Edmonton, Alberta, Canada
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Quote:
I am going to change mine out. I am waiting for the alum pulleys. I have the plastic set. Since the bearings are the part that you would think takes the most stress. The material of the pulley you think would not be that important. I ordered a new Futaba 14 SGH. I need it to start programming. This has been a long build. I have had a lot of waiting time for parts.
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soXos Strike 7.1 L, Diabolo 600, Logo 600, Kraken 580, Protos 380 Evo |
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