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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion › 700 Super Scale Tail Gear Noise!!!!!!
01-21-2016 12:40 AM  3 years ago
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TailKiller

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Panama City, FL

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700 Super Scale Tail Gear Noise!!!!!!
Ok guys, I need some help please.. Someone please tell me that they have found a way to quiet the drop down metal gear noise. If I adjust in a littlr slop then it's quieter.. but slop is not good. Solutions anyone.. please.. thanks.
Dennis
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01-21-2016 01:42 AM  3 years ago
co_rotorhead

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Centennial, CO, USA

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Did you lube the gears?
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01-21-2016 02:07 AM  3 years ago
Copter Doctor

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Enterprise/ft.rucker ,al- home of army aviation

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yes mine is quite noisy as well. like you I loosened the mesh a little and it helped, but only a little.drive a rotary, fly a rotorcraft
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01-21-2016 02:09 AM  3 years ago
TailKiller

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Panama City, FL

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I lubed them.. I filed the berr's off of them. I replaced the drop down shaft bearings but not the TT gear bearing. [I don't have one]. And slung lube everywhere as soon as I spooled up.Dennis
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01-21-2016 03:25 PM  3 years ago
TailKiller

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Panama City, FL

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Copter Doctor:
So you had had no ill effects by opening the gear mesh a little bit.
Dennis
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01-21-2016 06:04 PM  3 years ago
Copter Doctor

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Nope not at all. I inserted a strip of copy paper folded s couple times in between the gears and tightened the bearing blocks. Still a little noisy but not like before. I may try moving the gear on the vertical shaft up a fraction if a mm more to see if it helps but I sm ok with it now. In the fuselage it isn't as noisy anyway.drive a rotary, fly a rotorcraft
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01-21-2016 08:35 PM  3 years ago
TailKiller

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Panama City, FL

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That's what I did. I got it much better. I am also going to line the inside of the fuse with a foam layer in the mech's bay for acoustics dampening. I may also try to use foam to create a tail gear box and enclose it as much as possible. I want it as quite as possible so the Shock Wave sound system will sound better.Dennis
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01-21-2016 08:55 PM  3 years ago
Copter Doctor

rrProfessor

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Yes I've seen and heard the results if the foam to soundproof. Very good results. I am actually working on my own device to make the turbine sound on spoolup. Getting rid of one noise to create another lol!drive a rotary, fly a rotorcraft
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01-21-2016 11:11 PM  3 years ago
TailKiller

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Panama City, FL

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Yeah, it a good trade off. You are making your own sound?Dennis
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01-22-2016 03:55 AM  3 years ago
Copter Doctor

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You are making your own sound?
Yep! still in the experimental stage though
what fuselage is your mechanics for?
drive a rotary, fly a rotorcraft
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01-22-2016 04:46 AM  3 years ago
Tool Man Vegas

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Las Vegas, Nevada, U.S.A

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I am just about ready to fly my 700 superscale mechanics on a make shift landing gear set. Ive been running it up with no blades and found the mechanics to be a little noisy but very smooth with very little vibrations. I am super stoked how it runs.
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01-22-2016 09:43 AM  3 years ago
TailKiller

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Panama City, FL

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I have the AS350 B3 version #1 [sheriff's theme] I was not aware of the version or I would have looked for the V2. But they did add main shaft shims in case the vertical slop shows it's ugly head.. I told it will after about 6 flights. I will be doing a lot of pod and boom testing just in case. I still have to design some testing landing gear also.

We just had a twister come through Panama City 03:00 hrs... or my butt would be in bed right now

Oh yeah.. we just got our club website up and running. Check it out.. still a work in progress.

http://pcrcheliclub.com/
Dennis
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01-22-2016 10:58 AM  3 years ago
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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Tool man, I think you will like it. I was never thrilled about a belt rive power train and this is my first one since my GMP cricket like a hundred years ago. My buddy Darrell has always used them witout fail and when I got my Astar I actually had planned to use a whole different set of mechanics but I gave the compactor a chance and glad I did. Of course I had to change a few things to the control system and add a clutch. what fuselage do you have?
Tail, yea we were under a watch here in Enterprise as well. I hope you came through it ok. we will have to get together sometime with our Astars and compare notes.
I flew mine in pod n boom for a few flights before putting it in the fuse and now that its flown a few times its back in pod n boom while the fuse gets its work done. I have a thread here with pictures in the build section
the version I have has a collar/ring welded to the shaft on top of the upper bearing block
drive a rotary, fly a rotorcraft
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01-23-2016 11:59 AM  3 years ago
Tool Man Vegas

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Las Vegas, Nevada, U.S.A

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I'm doing the cobra. I should be test hovering Sunday.
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01-23-2016 01:14 PM  3 years ago
ssmith512

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Indianapolis, IN USA

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Late to the party!!

My Cobra is a bit noisy for sure, but it works very well and is super smooth. "Slop" is not necessarily a bad thing, as long as it is not excessive. Proper mesh is most important. Take the time to make sure the mesh is perfect for all of the metal umbrella gears and all will be well. Having the take off gear, then the drive gear to the boom, then the angled gear box, then the tail gear box is a whole lot of gears to make noise! By the time you get to the tail blades, there is a tremendous of play in the system, but after many flights, mine as proven to be reliable and fairly trouble free. On the metal gears, I have been using a light coat of Mobil 1 synthetic bearing grease. Havent seen any unusual wear.

Not the quietest system out there, but it works!
Steve
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01-24-2016 02:50 AM  3 years ago
Tool Man Vegas

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Las Vegas, Nevada, U.S.A

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I am a no go for my first flight tomorrow. I was fine tuning the head today and couldnt get the throws down. My servo horns are too long. With my vcontrol and vbars, I could not dial down the cycle
enough and I keep popping of the anti rotation ball link from too much travel.

How long servo arms are you guys using? Also, someone redid the
Linkage by moving the arms out. Anyone have any info on that mod.
I am looking for a longer 5mm shaft to use.

Jan
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01-24-2016 03:43 AM  3 years ago
TailKiller

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Panama City, FL

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I haven't test flown yet, still working on a LGear. Its a different setup for these mechs. They weren't designed to have a range of -13 / +13. You only want a range of about 13 total. Im set at -2.5 / +9.5.. this may change after the test but I think it will be close.
I'm using Aligh round metal horns and the ball link is in the inside hole. My aileron and elevator and pitch servo travel is at 70%. My TX pitch curve was linear during swash leveling only. After that I went back to the pitch curve [not in the software anymore] and adjusted the curve to have a -2.5 at bottom, +4.0 at mid stick and +9.5 at full. I also set my controllers cyclic ring / limit to 40%. The outcome is if you pull back on the elevator with the collect all the way down you will still bend on the elevator servo control rod but.... while in the air flying.. you will need to pull the elevator back to full deflection before it just bumps the control rod..

There are several good build threads out there but no one really gets into how they setup their heads. I'm new with these mechs. but bench test look good.

Oh.. I put a small washer under the elevator servo horn ball.. that was so the elev ball link would not rub on the pitch servo horn.
Dennis
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01-24-2016 03:56 AM  3 years ago
ssmith512

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Indianapolis, IN USA

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How long servo arms are you guys using?
10mm on my Cobra, but I am also using a Trex 700 swash and Trex700 rotor head. Not sure how those two items change the geometry.
Steve
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01-24-2016 04:08 AM  3 years ago
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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[quote]Also, someone redid the
Linkage by moving the arms out. Anyone have any info on that mod.
I am looking for a longer 5mm shaft to use.[quote]
You wont need a longer shaft, I used the existing shaft.
cant really help you with the swash deflection adjustments as I am not using a stab system. I adjust my deflections amd limits using the travel adjust.

drive a rotary, fly a rotorcraft
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01-24-2016 04:30 AM  3 years ago
TailKiller

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Panama City, FL

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According to the caliper on mine.. center of servo gear to center of ball is 12mm..Dennis
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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion › 700 Super Scale Tail Gear Noise!!!!!!
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