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09-14-2013, 06:05 AM | #1 (permalink) |
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Join Date: Apr 2012
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Belt comming off issue
So I'm new to the Protos family and I have getting frustrated with my 500
I watched the build video on belt tension but I cant seem to get it right or there in an issue that causes this problem that I am unaware of. Issue: Bet comming off in flight. When: full collective after lift off or after 45 sec of hover. Trouble shooting: Checked tension multiple times, made sure belt was aligned with all the pullies, correct belt twist, gears all good, pinion tight on the motor shaft, belt is good. This issue forced me to learn real quick how to auto! Not pretty but didnt crash or break amything. please help or I will be forced back to Align. |
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09-14-2013, 06:27 AM | #2 (permalink) |
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Join Date: Feb 2007
Location: England
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Where is your belt running on the main gear - mine was running a little high (top of belt level with top of pulley). I loosened the boom block and horizontal fin screws and lifted the back of the boom so that the belt now runs much closer to the middle of the main pulley.
Not sure if this is your problem but well worth checking. Cheers, Mike. |
09-14-2013, 06:30 AM | #3 (permalink) |
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Join Date: Apr 2012
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When I get it to the ground the belt has always been below the main gear. I tried tilting the boom it up and down
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09-14-2013, 04:37 PM | #4 (permalink) |
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Join Date: Dec 2010
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Re: Belt comming off issue
I've noticed that a slight adjustment of the tail boom block angle (you can rock it up and down) has a large impact on where the belt rides on the main gear.
Chief Sent from my XT890 using Tapatalk 2
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RC Chief Hobbies MSH Protos 500 Flybar, Gaui 200 V2 Flybar,V120D01, V120D02S,MCPx (retired) Boating Fleet: Toysport Syncron and Triton Monos, 1/10 scale 1967 Miss Bardahl Shovelnose Hydro, Executone semiscale Hydro, OPC Tunnel, Miss Geico Cat |
09-14-2013, 04:42 PM | #5 (permalink) |
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Join Date: Sep 2012
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make sure your boom is installed the correct way. (easy to install backward cuz the manual pics look that way) You want the slots in the front, hole in the back, and the logo on the starboard side face up. if the slots are in the rear, the tail can slide around, then your belt tension will change, and pop off the gears.
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I'd rather build 'em than fly 'em |
09-14-2013, 05:20 PM | #6 (permalink) | |
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Join Date: Apr 2012
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Quote:
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09-14-2013, 05:58 PM | #7 (permalink) |
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Join Date: Jan 2006
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A friend of mine installed a second idler pulley on his Protos (I think on the other side of the frame).
His never came off again.
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KBDD-Team Captain, JR DFA Team Pilot. Forza 450, Forza 600N, Forza 700, Compass 6HV-U, Warp, 7HV,Knight Pro,Knight 3D, Atom, Odin II, 6HV, 3D Plus, Knight 50, Chronos, Velos, Steam 550 and 600, OMP M2 (and anything else I can get my hands on...). |
09-15-2013, 06:38 AM | #8 (permalink) |
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Join Date: May 2011
Location: New Jersey
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Also check your motor mount. Your motor/pinion nrrds to be // to your main shaft. If the slots are worn on frame (more common on plastic frame then cf) your motor may have slight tilt.
Check idler pulleys as well. As bearings start to go bad they can get run out and cause belt to not align, and can also wear the groove they sit in on tail block as well as front idler mount.
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10-04-2013, 07:27 PM | #9 (permalink) |
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Join Date: Dec 2010
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Any update if this has been resolved?
Chief
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RC Chief Hobbies MSH Protos 500 Flybar, Gaui 200 V2 Flybar,V120D01, V120D02S,MCPx (retired) Boating Fleet: Toysport Syncron and Triton Monos, 1/10 scale 1967 Miss Bardahl Shovelnose Hydro, Executone semiscale Hydro, OPC Tunnel, Miss Geico Cat |
10-04-2013, 08:47 PM | #10 (permalink) |
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Join Date: Apr 2012
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Totally forgot about this.
So far I have had 3 full flights with zero issues. These flights were very lame. 80% power doing hovers and figure 8's. I got so frustrated with it that I tore the heli down to nothing and "re-built" it. In doing so I think I noticed the issue and it was a stupid mistake on my part . Basically the main shaft collar was not snug against the top bearing. This allowed the shaft and all connected parts to shift upward ever so slightly (a few mm) which casued the belt to slip off the bottom of the main gear. |
10-04-2013, 09:01 PM | #11 (permalink) |
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Join Date: Aug 2007
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I am glad you found the issue. I have had my protos for a short while and I love how it flies.
Happy Flying!! Les
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10-04-2013, 10:11 PM | #12 (permalink) |
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Join Date: Dec 2010
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I'm glad you spotted the issue. I've had over 90 flights across two Protos and never had belt come off-- in the beginning I had the belt running really low on the main gear until I figured out I can adjust the tracking by the angle of the boom...
Chief
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RC Chief Hobbies MSH Protos 500 Flybar, Gaui 200 V2 Flybar,V120D01, V120D02S,MCPx (retired) Boating Fleet: Toysport Syncron and Triton Monos, 1/10 scale 1967 Miss Bardahl Shovelnose Hydro, Executone semiscale Hydro, OPC Tunnel, Miss Geico Cat |
10-07-2013, 08:38 AM | #13 (permalink) | |
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Join Date: Mar 2007
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Quote:
http://www.helidirect.com/msh51080-m...os-p-24431.hdx
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. Fighting keraunothnetophobia one flight at a time. Blade 450 flybarred, Protos 500 stretch, BD3SX, Spektrum DX8. My HF Map location |
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10-07-2013, 11:06 AM | #14 (permalink) |
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Thread Starter
Join Date: Apr 2012
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I will be looking that route as well thanks
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10-07-2013, 07:20 PM | #15 (permalink) |
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Wow really?! MSH came out with those a couple of years ago and then just stopped making them and went back to the original design. Now they're back again...weird.
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10-07-2013, 08:55 PM | #16 (permalink) |
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Join Date: Sep 2012
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I think your better of with the adjustable collar. If you use that shaft with it built in, you will have to shim it to get zero slop. Very important that part has no vertical play.
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10-08-2013, 08:58 AM | #18 (permalink) |
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Join Date: Dec 2010
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I like the standard shaft without that lip. Just check the collar after every crash.
Chief
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RC Chief Hobbies MSH Protos 500 Flybar, Gaui 200 V2 Flybar,V120D01, V120D02S,MCPx (retired) Boating Fleet: Toysport Syncron and Triton Monos, 1/10 scale 1967 Miss Bardahl Shovelnose Hydro, Executone semiscale Hydro, OPC Tunnel, Miss Geico Cat |
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