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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion › Scale helicopter shakes is it gyro or blades
02-01-2016 04:05 AM  3 years ago
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Teamapache

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Scale helicopter shakes is it gyro or blades
Since I've been back flying I've been using spectrum 9 channel with AR7200BX. For all my scale helicopters. Is there any other user friendly receiver gyros you scale pilots are using. Helicopter keep shaking is it the Gyro or blades. I check the balance and make sure the tracking is on maybe I should try a different set up. What are you guys using for the newest Gyro receiver all in one
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02-01-2016 04:13 AM  3 years ago
Copter Doctor

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shaking means something is out of balance ( blades, mast, spindles bent etc.) if its oscilating, then there's something off with the sensitivity on the gyros somewhere. I am no expert with the stab systems but I am sure some of the others will chime indrive a rotary, fly a rotorcraft
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02-01-2016 04:31 AM  3 years ago
old nitroman

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Naples florida

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on my roban the head speed has to be in the 1300 to 1400, and I did balance the blades, also check blade bolts, mine like not to tight but not loose. blades I got the cg were offE5s and E7se,and a 766, Roban bell 222 800 superscale,450 bell 4 bladed head,gobby 380and 420 ,180cfx
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02-01-2016 05:22 AM  3 years ago
Teamapache

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Big money on blades
Hello there copter doctor and old nitroman Quick response wow.. Same head speed 1300 to 1400 works great on my airWolf after I figured it out it was the blades. I spent a lot of ((($$$$Ching Ching ))) on the AirWolf because the set of blades that come with it weren't that good. Did some research and found metal blades and super balanced they're called M-blade $250 they better work great I got them from Germany. I set up my 407 same set up and it shakes. Even tried different blades From my 429 and even a five blade set up still shakes but when I put on the 2 blade on it no shake can it be all the blades from Roban that come in the robin kits are no good but I've seen videos of the stock blades working fine don't understand. Anybody else having this problem. Maybe if I try to different Gyro I don't know. What Gyro are you using give me a couple ideas I'm sure there's couple of different ones on the market not sure . thanks guys appreciate it

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02-01-2016 05:49 AM  3 years ago
Copter Doctor

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Hey let me tell you somethng about blades. never take it for granted that because they come finished and ready to bolt on that they are perfectly balanced. I check every blade set I get on the balancer first before they get bolted on. I would rather add a little bit of tape to one to get that bubble centered at home on the bench than wished I did when I am out at the field with a shaky heli. my brand new set of blades that came with my roban A-star needed a little tape on one of them to get them all the same. no big deal but it makes me certain that if theres any shakes after that, I can eliminate it being the blades and look to something else. when those M blades get here, check em' $250 blades can still be out a few grams altho for that kinda $$ they should damn near mount themselves
I shelfed the roban blades not because they shook or anything but they were just too light weight. I used a set of rotortech 690,, carbons on my astar and I fly it without a stab system. the only wobbling or shaking that's going on is in my knees, maybe I need to balance them heh heh
drive a rotary, fly a rotorcraft
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02-01-2016 06:52 AM  3 years ago
Teamapache

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Balance your blade
Point well taken nice post thanks. Those blades should should Mount themselves--flies like it's on auto pilot which is nice. So you don't think it's the Gyro.after all that bouncing and replacing any part as needed. The AR7200BX I like it good Gyro. What are you using for Gyro receiver.. Just thought I would ask that was my only problem for now I will keep trying and get back to the subject.. After more testing now I feel like a test pilot??😎 Would like to try a different Gyro what do you suggest
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02-01-2016 07:16 AM  3 years ago
Double E

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Atlanta, GA

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Can you tell if it's a head shake or a tail shake? Head shake usually shakes the whole helicopter and a tail shake is usually a left and right twist/turn during flight. Have you tried adjusting your sensitivity or gain on the 7200bx? Have you confirmed that the main and spindle shafts are straight? Are the main and spindle shaft bearings good? Do your mechanics have enough attachment points to the fuselage to reduce or eliminate any harmonic wobbles. I had a Hughes 500 that shook pretty severely until I fabricated a brace to attach the top of the mechanics to the fuselage.

I've always had good luck with my 7200bx units. They may not have all the bells and whistles of some of the other systems but they are pretty simple to set up and do a great job stabilizing.
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02-01-2016 12:43 PM  3 years ago
Copter Doctor

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What are you using for Gyro receiver.. Just thought I would ask that was my only problem for now
none of my machines are using a stab unit.
drive a rotary, fly a rotorcraft
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02-01-2016 02:37 PM  3 years ago
old nitroman

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Im using the ikon or brain systemE5s and E7se,and a 766, Roban bell 222 800 superscale,450 bell 4 bladed head,gobby 380and 420 ,180cfx
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02-01-2016 04:22 PM  3 years ago
flyawayed

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I second the 7200bx they work great and in my experience with the Roban blades is the they say the set of blades are balanced but like Emile I take that with a grain of salt and I always check the CG and balance of every blade before it for on any ship I'm building. I had a set of blades that came with a SS blackhawk from Roban and 3 out of 4 blades needed some tape to balance out before the first flight and when I tested the mechanics with the owner of the Heli there he was like Wow its smooth but he didn't know how out of balance the blades really were. For me I just don't like the design of the Roban flat bottom blades, there too light and the flat bottom Adds to much drag for the tail to keep up unless you have bigger tail blades or muiltiable blades on the tail. But being I'm using beastX on all my birds with out issues I would check ur blades and head first before anything. Also keep in mind the the SS Main shafts are a copy of the goblin mechanics the main shaft metal material isn't harden like SAB shafts are so they can get tweeked very easily, found that out the hard way that why RCA can't keep them In stock ppl are bending the main shaft.edward lopez sanchez
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02-01-2016 04:43 PM  3 years ago
Heli143

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Phenix City, Alabama

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[quote]For me I just don't like the design of the Roban flat bottom blades, there too light and the flat bottom Adds to much drag for the tail to keep up unless you have bigger tail blades[quote]

Edward, the first time I hovered the 429 mechs with their scale blades I thought they were stable and smooth but was adjusting to the left hand rotation.

But, when I left my mechs with Emile he switched over to some Rotortech blades and said it was like a different heli. very stable like my MC407 with rotortech blades where it's so smooth and stable WITHOUT a stab unit you think it has one.

well, before the one way bearing went out yesterday I hovered just a bit in some nasty shifting wind and even so could tell the difference. Very smooth and really stable.
Roy Mayoral
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02-01-2016 05:16 PM  3 years ago
Teamapache

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Lake Mary fl us

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Turn down the gain would help
All right thanks everybody balance the blades and turn down settings on the 7200bx I have had good luck with this unit two I like it a lot and now I'm know even more about it thank you very much everybody. You are right About the tail rotor on my 407 --2blade. now is a four blade better tell authority. But I like the two blade for scale looks.I will have to try that.the rotortech blades. Sounds good 😊 I am so happy I got it flying great but my knees are still shaking LOL:. Keep the posts coming I am taking notes great website hope to see everybody at Topgun might be a late bloomer🤓I will ask for imitation if I can swing it. I will try to attend hard to get away from work might have to be a spectator this year.
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02-01-2016 06:25 PM  3 years ago
old nitroman

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Naples florida

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Rotortech makes ccw blades? have any info on them?E5s and E7se,and a 766, Roban bell 222 800 superscale,450 bell 4 bladed head,gobby 380and 420 ,180cfx
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02-01-2016 07:21 PM  3 years ago
Copter Doctor

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For better tail authority I make a set of longer blades for my machines. The rotortech blades are fully symmetrical so I mount them upside down for left hand rotation as I did in Roy's machinedrive a rotary, fly a rotorcraft
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02-01-2016 08:29 PM  3 years ago
old nitroman

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Naples florida

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my blades are 750mmE5s and E7se,and a 766, Roban bell 222 800 superscale,450 bell 4 bladed head,gobby 380and 420 ,180cfx
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02-01-2016 08:32 PM  3 years ago
old nitroman

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Naples florida

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710 is that what you using, 800 size heliE5s and E7se,and a 766, Roban bell 222 800 superscale,450 bell 4 bladed head,gobby 380and 420 ,180cfx
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02-02-2016 12:20 AM  3 years ago
oldfart

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Vancouver, Canada

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Rotor-Tech also make 760mm and 810mm rotor blades.

If one is using an 800mm heli with a multi blade head, then he may want to use shorter 690mm to 720mm blades.
Phil
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02-02-2016 12:56 AM  3 years ago
Teamapache

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Lake Mary fl us

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For better tail authority
i think the 407-700 super scale tail blades are 105mm how long can you go 115mm For better tail authority wood like to keep it 2 blade
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02-02-2016 01:16 AM  3 years ago
flyawayed

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orlando , fl .USA

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I've done in the past is used main blade for t-rex 250 and cut them both down to make a set of 130 millimeter tail bladesedward lopez sanchez
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02-02-2016 01:55 AM  3 years ago
coptercptn

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Mesa AZ. USA

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I use 450 main blades to build the 190mm tail blades on my 53Home of the "Sea Cobra".....
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HomeScale✈️AircraftScale HeliScale Helicopter Main Discussion › Scale helicopter shakes is it gyro or blades
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