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HelicopterSynergy R/COther › Tail gear issues
01-18-2010 07:33 PM  8 years agoPost 1
Evil_Homer

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Cubbington, Warwickshire, United Kingdom

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Need some help here,
First off, I recently acquired my Synergy second hand, the previous owner is a miticulous builder and maintains his heli's very well.
I have put around 14 flights on this machine, and I am absolutly loving it, this thing ROCKS, anyways an issue:

There is some wear showing up in the tail gears, quite a lot actually. This was not there when I got the machine, but I do fly harder and abuse the tail a lot more. There is between 5 and 10 degrees of backlash when the main rotor is held and the tail moved, is this normal?
There is no wear on the crown gear.
What grease is recommended for the tail gear assembly.

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01-18-2010 08:13 PM  8 years agoPost 2
Entityofme1

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Birmingham, AL.

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motul tech 300 grease..Depending on the severity of the wear the grease may or may not at this point provide adequate protection. I too consider myself a fairly meticulous builder but learning the correct mesh or amount of backlash with these metal gears is something that may take a couple of times to get right. It took me three sets to find the optimum mesh. When meshed correctly and greased it's arguable that they will almost last indefinately. I'm going on about 20 gallons now and haven't even worn the coating on them yet. Trully great product and makes the synergy all the more bullet proof in the air. You can literally be as abusive on the tail as you want with these and suffer no ill effects although I wouldn't recommend just going full deflection back and forth with blurring speeds.

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01-18-2010 08:30 PM  8 years agoPost 3
Evil_Homer

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Cubbington, Warwickshire, United Kingdom

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Would really like to be able to get a set of the metal gears, no one seems to have them in stock, ==> I am stuck with the plastics.

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01-18-2010 08:41 PM  8 years agoPost 4
thenewguy

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Corvallis, Oregon Where there is liquid sunshine!

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You need to find and fix the back lash issue. I run the stock TT system and have zero back lash. Also are you running any delay settings in your gyro?

Chris

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01-19-2010 12:11 AM  8 years agoPost 5
greger

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Mesa, AZ

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since he says plastic gears he is talking about the back gears in housing at tail. That sounds like excessive wear to me... I don't believe lubrication is recommended for the plastic on plastic (stock) set. Sounds like you need a new set and pay close attention when replacing looking at the mesh.

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01-19-2010 12:41 AM  8 years agoPost 6
thenewguy

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Corvallis, Oregon Where there is liquid sunshine!

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What I have found if you are running the stock TT, at the front of the assembly where the hexagon piece slides in, it can have wear and allow slop. I take clear scotch tape and place a nicely cut strip on each of the side of the hexagon. Making sure it is perfect. Then side it back together. This will make it slop free and give the whole system zero back lash if the gears are meshed properly.

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01-19-2010 02:33 AM  8 years agoPost 7
Ironhide

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dexter mi us

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Just wanted to pipe in and say my one metal, one plastic gears are doing great .I only got a gallon on them before the snow fell but look just like I installed them . I do run some tri flow on them every few flights . A few drops there and on the swash .

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01-19-2010 03:49 PM  8 years agoPost 8
Evil_Homer

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Cubbington, Warwickshire, United Kingdom

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Does anyone know where some of the metal tail gears are in stock?

I am using a Spartan gyro, stock settings at the moment as I dont have the USB interface, I was under the impression that these are set up by default with some delay.

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01-19-2010 04:12 PM  8 years agoPost 9
cdrking

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Seattle

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No grease needed if you are using plastic gears. I've been using a Spartan for quite some time now in the N9 and it works fantastic. It really is nice to program it with the PC. If you can find access to a USB cable I will post my settings. Also the new firmware (2.0) is excellent.

As stated above you need to run zero backlash in the tail gears. Also if you are not doing a lot of hard piro reversals the plastic tail gears will work fine. I've been running plastic gears since August 2006 and have not stripped tail gears in-flight. I do a lot of piro stuff but not a lot of hard reversals.

Let me know if you need the settings. I can get a screen shot of them if you like.

Cheers,

Jeff

To hover is divine, the alternative is rather PLANE.

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01-19-2010 04:31 PM  8 years agoPost 10
spdntckt

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San Jose, CA USA

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what is the benefit of putting one metal and one plastic? i would assume the weakest link (plastic) would not provide any additional resiliency vs. 2 plastic?

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01-19-2010 05:07 PM  8 years agoPost 11
Evil_Homer

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Cubbington, Warwickshire, United Kingdom

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My understanding is the one metal one plastic will provide a sacraficial point whereby the plastic tail gear should strip before the crown gear does, the tail output gear is fairly easy to replace and half the cost of the crown gear.

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01-19-2010 05:47 PM  8 years agoPost 12
Ironhide

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dexter mi us

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Yep what he said !^^^

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01-20-2010 03:44 PM  8 years agoPost 13
Evil_Homer

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Cubbington, Warwickshire, United Kingdom

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I went and picked up the Spartan Flash-Link today, deceleration profile was defaulted to Fast, I have reduced it too around 60% and will give that a try.

cdrking - if you would not mind posting your Spartan settings that would be great.

Thanks

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01-21-2010 05:49 AM  8 years agoPost 14
cdrking

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Seattle

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I will try to get them posted tomorrow morning, had a looong day today.

Jeff

To hover is divine, the alternative is rather PLANE.

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01-21-2010 08:26 AM  8 years agoPost 15
Evil_Homer

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Cubbington, Warwickshire, United Kingdom

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Thank you very much sir - when ever you have the opportunity.

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01-21-2010 07:00 PM  8 years agoPost 16
cdrking

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Seattle

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To hover is divine, the alternative is rather PLANE.

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01-25-2010 05:21 PM  8 years agoPost 17
Evil_Homer

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Cubbington, Warwickshire, United Kingdom

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Hi Jeff,
Thanks for the info, flew the Synergy over the weekend, seems a lot better on the tail, the stops are not as dramatic.

All the backlash has been taken out, in fact of it originated from the tail input gear, took three shims to work it out.

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01-25-2010 06:12 PM  8 years agoPost 18
cdrking

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Seattle

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Excellent, glad you got it sorted out. Just keep checking the backlash and take out the lash with a shim or two and you'll be golden.

I think I have about 350 flights on one set of tail gears (plastic).

Jeff

To hover is divine, the alternative is rather PLANE.

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