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Align
Other › My rotorworkz's CCPM conversion
05-02-2005 09:09 PM  12 years agoPost 1
Skycat

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San Gabriel, CA

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Finally it's done and I had some flights yesterday.
The climb rate is weak. Most likely my motor is the one to be blamed. I'm still waiting for AON 3500 motor from Modefo's Heli. We'll see.

Cyclic response is awesome, and stable. I could hands off from the sticks for like several seconds now.

I am still having tracking issues, it tracks ok when on the ground, maybe just 1 to 2mm off. But as soon as I give it some collective, it'll off by about half an inch, making some vibration.

Do you guys think it's my metal blade grips problem? After I tighten both screws on the spindle, both blade grips can still move in and out about 1/8 inch.

By the way, I think I was really lucky too yesterday. I was testing the tail response and doing some fast pirouetting at about 5 feet. All of a sudden, the tail was lost and spining crazy. I was lucky to bring it down without a scratch, and upon checking the tail, found that the both ball links were seperated from the tail grips. How could them got seperated?

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05-02-2005 09:27 PM  12 years agoPost 2
Kyle2baseball

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Kissimmee, FL - USA

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I just got my Rotorworkz frame. It is really nice.

Fury Extreme
Stratus Soon
16 Y/O

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05-02-2005 09:30 PM  12 years agoPost 3
WRXRonald

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Auburn, OH

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good job sky...
you should find a wee bit better climb rate with good tracking, as the motor shouldn't be working so hard to achieve a satisfactory headspeed... but for that tracking, its got to be the grips... ? or your ball link arrangment.....

with the align carbons (notorious for bad tracking)... i accomplished perfect tracking in the blink of an eye... one turn to the long link and it was perfect. even to 2450 headspeed, no matter the manuever, well-- at least upright manuevers anyways... tried inverted, down she went into the pavement due to me bad fingers.

anyways... looks like you got the dual o-ring head, and all the good align cnc bits... tracking should not be a prob for you. i am using the sparrow grips instead... but 1/8 inch movement sounds huge... are you talking left/right sliding on the shaft? or do you mean 1/8 flex up/down on the grips?

gotta suggest flytechs idea here--- get 3 bearings in each grip... no matter how you gotta do it... get them in there... fidget with it alot, but get it done! it will stop wobble in the grips. make sure in doing so that you don't have an overly-tight head though-- that will cause up/down wobble of the whole bird in flight. oh yeah... try different combos... two stock width bearings with 1 tail case bearings, or 2 tail case bearings with one stock-width grip bearing.... the tail case bearings are thinner, but even 2 of them with one grip bearing is more bearing area than just 2 grip bearings alone. using the tail case bearings will allow a bit more room on the shaft so you don't have an overly tight shaft once tightened down on the screws... you can also effectively make you shaft longer by using the brass bushings supplied with the stock plastic pitch arms... (tiny little brass bushing is same outer diameter as spindle, and the screw will fit through it perfectly, effecitvely making the spindle shaft about 2 mm longer... allowing for more room to put extra bearings in.... try it, whatever works for you works... but getting 3 bearings in will reduce overall head slop and might help your tracking probs.

hope that helps.

Good Day: crashed thx to dumb thumbs. Bad Day: crashed mechanical malfunction. Every Day: CRASH :)

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05-02-2005 09:52 PM  12 years agoPost 4
Skycat

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San Gabriel, CA

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Hi ron!
I tried both woodies and carbon blades, it still doesn't track.
Yea, I have dual o-ring head. I am talking about 1/8" left/right sliding on the shaft. There is no up/down flex on the grips.
What is the arrangement of 3 bearings in each grip? Align's metal blade grip already comes with an extra bearing. So starting from the center, it's aluminum collar, bearing, blade grip, then two bearings inside the blade grip.
I tried fitting a third o-ring, but it didn't do anything since the gap between the grip and the head is huge.
I tried pull out the shaft alone and just tighten screws at both ends. There is about 1-2mm gap between the screw and the shaft. Is that normal?

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05-03-2005 12:49 AM  12 years agoPost 5
JYRiker

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Maryland - USA

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Hummm, looking at your pic you have very little space between blade grip and the head assemble..

Then your description of components mounted on the spindle concerns me ...

After having the spindle shaft in the head, I have ( starting from the inside ) 2-orings, washer, brass spacer, then the blade grip with the stock bearings. On my ulimate head I am building ( buying components to build the ULTIMATE T-REX ), I am using the Sparrow grips and head along with 3 bearings. Starting from center, 2-0rings, washer, 3rd bearing ( after converting to eccpm, had left over bearings ), then the blade grip with 2 bearings ( also using upgraded SS spindle with nuts). One of my pics in my gallery show the first setup...

Johnny

HeliUp Frame Trex 450
CF Trex 600
CF Trex 500

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05-03-2005 01:02 AM  12 years agoPost 6
Skycat

rrApprentice

San Gabriel, CA

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JYRiker, I might have moved the grips toward the head before I took the pictures. There is definately some play in between the head and grips.Maybe not 1/8" that much, but it has definately at least 2 mm gap in between them and I can easily slide the grips horizontally. Is that bad?

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05-03-2005 01:10 AM  12 years agoPost 7
westcoastchoper

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Denton, Tx

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I am looking at your pics and it appears you have left out the alomost 1/8th inch spacers that slide on the feathering shaft. I did the same thing when I first put mine together. I didn't notice it until I put mine down next to a friends trex. Without the spacers, when you tighten the allen bolts into the feathering shaft, they bottom out on the shaft before they get tight. Give it a look, maybe I am wrong. Let us know.

Josh

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05-03-2005 01:11 AM  12 years agoPost 8
JYRiker

rrApprentice

Maryland - USA

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I don't know if it's bad, but does not sound right...

I have no play on either setup I have. Check and make sure your bearings are seated properly in the blade grips ( I had some work getting my bearings to fit in my sparrow grips ). Somewhere you have a little gap that is allowing that slop.

Johnny

HeliUp Frame Trex 450
CF Trex 600
CF Trex 500

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05-03-2005 01:36 PM  12 years agoPost 9
WRXRonald

rrKey Veteran

Auburn, OH

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...
no doubt for me that your 'left to right 1/8 inch' play is root of your tracking problem...... its got to be at least part of it.

get rid of that 1/8 inch play, somehow or another. sometimes you gotta just get creative with it and see what works and what doesn't via trial and error. many of us have spent good bits of time working on the right combo of head pieces/parts/bearings... you may have to do the same... it always seems to be a little different for each of us what works out in the end.

good luck with it. focus on getting rid of that play first--- if that doens't cure your tracking prob, then move on to the next issue-- whatever that may be....

Good Day: crashed thx to dumb thumbs. Bad Day: crashed mechanical malfunction. Every Day: CRASH :)

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05-03-2005 09:00 PM  12 years agoPost 10
Skycat

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San Gabriel, CA

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Thanks Ron. I used another screw to tighten the feathering shaft. I could screw it down all the way with this screw. I also added a third o-ring on each side. Now, it has only 1mm play. I haven't had a chance to test it yet, will do it later on today.

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