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HomeAircraftHelicopterThunder TigerRAPTOR 90 › raptor 90 3d head grips
04-10-2010 04:51 AM  8 years agoPost 1
westwindpilot

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Glendale, AZ

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Hey guys, building a raptor 90 3d for a friend. I have built quite a few helicopters and there is a part that has me stumped. After tightening my blade grip bolts to the spindle I move my blade grips and they are very grindy feeling and tough to move.

I know my thrust bearings are right.

Any ideas?

And one more thing, on the dampeners, cause its an inner and outer dampener. Does the red dampener face inside or outside toward the blade grip?

Thanks

Steve

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04-10-2010 07:39 AM  8 years agoPost 2
PJRono

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Minnesota, Ya!

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They're grindy because the head assembly is tight, either too many shims or something's assembled wrong.

If you skip me I can't play!

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04-10-2010 09:29 AM  8 years agoPost 3
westwindpilot

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Glendale, AZ

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I am using no shims and I followed the manual perfectly. I even had a helicopter guy assemble as the instructions say to and he is confused about it.

Steve

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04-10-2010 09:46 AM  8 years agoPost 4
cd5

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penrith,Australia

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I have the same issue with mine . When i ran 3 shims as per manual for hard 3d they were notchy as hell. I removed 1 shim at a time till the notchiness went. I ended up with no shims and still slightly notchy. I replaced all bearings,and dampeners. Still notchy. I fly it like this and it flies fine. It does demonstrate a slight bobble after hard collective inputs as if the dampening is still a little hard. This bobble seems to be decreasing as the dampeners wear. I dont know if this is the issue though as rappies do have a documented head bobble anyway. Im thinking the 3d has excessively hard dampening to reduce boom strikes.

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04-10-2010 10:07 AM  8 years agoPost 5
PJRono

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Minnesota, Ya!

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If you pull out on the grips, as the blades would do in flight, the notchyness should go away.

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04-10-2010 11:37 AM  8 years agoPost 6
magster

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NH

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Mine is the same. PJrono is absolutely right. If you pull out on the grips, the notchiness goes away.

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04-10-2010 07:35 PM  8 years agoPost 7
LonR

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Macomb,Mi

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Make sure you have the flat end of the dampers on the out side of the head block.I have the shim on mine with no issues.

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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04-11-2010 01:06 AM  8 years agoPost 8
PJRono

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Minnesota, Ya!

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The dampeners can vary in size and durometer from one to another (although they're close). Even the bearings, feathering shaft, and washers in the grips may vary in the thousandths. This may be why some people experience this phenomonon, with the exception of FlyingHigh450, who has built so many helis he knows it all.

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04-11-2010 01:08 AM  8 years agoPost 9
PJRono

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Minnesota, Ya!

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Ever wonder why they put those shims in your kit in the first place? This would be why. Some people will need them, some will not.

If you skip me I can't play!

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04-11-2010 02:03 AM  8 years agoPost 10
Yug

rrMaster

UK. Herts

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Notchiness generally means the bearings are not good or in the case of grips, the thrust bearings were not perfectly cleaned prior to greasing. Bearing quality is so important and it amazes me how so many seem to ignore this fact. Many of the bearings we use in our helis are quite fragile and after any kind of a crash, the undue forces exerted on the bearings knacker them but most don't seem to care about this

Vegetable rights and Peace

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04-11-2010 02:23 AM  8 years agoPost 11
LonRrrElite Veteran - Macomb,Mi - My Posts: All  Forum  Topic

•PJRono
with the exception of FlyingHigh450, who has built so many helis he knows it all.
I love the smart mouth comment when all I did was try and help.I was saying maybe he put the dampers in backwards.The pic I took of the damper im holding with the flared end that gos in the inside of the headblock.If that side of the damper is on the outside where the shim gos,the bearings will be tight and notchy.Not sure why you feel the need to act like a 12 year old making smart mouth comments on the guys thread but I feel I give some good advice that could be the problem and yes,I have the shims on both of my Raptor 90's .Never claimed to know it all like you are,just trying to help fix a problem.



600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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04-11-2010 02:51 AM  8 years agoPost 12
PJRono

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Minnesota, Ya!

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He stated TWICE that he put it together correctly, and also had another person do it too. But evidently you do not read either!

If you skip me I can't play!

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04-11-2010 02:57 AM  8 years agoPost 13
LonR

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Macomb,Mi

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I was only trying to help,no need to be a smart mouth like allways.Grow up and stop killing the guys thread.Ive put my dampers in backwards before,people do make mistakes...

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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04-11-2010 03:04 AM  8 years agoPost 14
LonR

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Macomb,Mi

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•PJRono He stated TWICE that he put it together correctly, and also had another person do it too. But evidently you do not read either!
Maybe your the one that doesn't seem to know how to read .Did you miss this part some how??
westwindpilot
And one more thing, on the dampeners, cause its an inner and outer dampener. Does the red dampener face inside or outside toward the blade grip?

Thanks

Steve
The red faces the out side but the flanged side of the damper gos to the inside.The red inner part 3D dampers are flat on both sides but I had a brand new set that had a little flare on one side,thats why I said put the flared side in the head..

Maybe you can stop acting like a know it all and stop killing the guys thread with your smart mouth comments and there no help to the OP..

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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04-11-2010 03:52 AM  8 years agoPost 15
PJRono

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Minnesota, Ya!

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FlyingHigh(most likely)- Hmmmm, I thought I was on your ignore list because you couldn't DEAL with people. Please put me back there as I already know what kind of person you are.

As to the problem- as long as it's put together correctly, the new parts dampeners, washers, bearings are putting a side load on the radial bearings. Radial bearings are not meant for a side load, hence the notchiness you feel. However, when the heli is flying the side load on the radials is taken away by centrifugal force of the blades and the thrust bearings take the load. As your dampeners wear in/get used this notchiness will abate.

If you skip me I can't play!

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04-11-2010 04:20 AM  8 years agoPost 16
LonR

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Macomb,Mi

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You say you know what kind of person I am but all I was doing was trying to help,all you did was keep attacking me for no reason.You were on ignore for the same thing your doing now,running your mouth for no reason and everyone can see that,good job .I thought the hobby was about having fun and helping others,not doing what your doing .Have fun killing peoples threads,your getting good at it..

westwindpilot,
Hope you get the problem fixed and sorry about PJRono as im sure hes not..

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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04-11-2010 04:43 AM  8 years agoPost 17
PJRono

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Minnesota, Ya!

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FlyingHigh450- you go off at the slightest of things and still are ranting. I think I know who needs to GROW UP.

Moving on...

If you skip me I can't play!

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04-11-2010 04:46 AM  8 years agoPost 18
PJRono

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Minnesota, Ya!

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I've worked on more models of helis than your real age FlyingHigh. Plus I've already given him the reason, please read the post.

If you skip me I can't play!

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04-11-2010 05:03 AM  8 years agoPost 19
LonR

rrElite Veteran

Macomb,Mi

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Dude,your the one started attacking me and you still are,leave me alone and im not going off at the slightest,you are for no reason at all.
.
•PJRono
I've worked on more models of helis than your real age FlyingHigh. Plus I've already given him the reason, please read the post.
Thats good for you and I give another option that could be a problem but you seem to have a problem with that and keep talking trash.Sorry im not a walking heli manual like your making yourself look like (a know it all) and think your better than others.Stop attacking me for no reason.Do you really think your making yourself look good or somthing?All your doing is killing the guys thread.Noone wants to help people when theres a know it all thats worked on more helis that everyone here,grow up..

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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04-11-2010 06:44 AM  8 years agoPost 20
PJRono

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Minnesota, Ya!

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No trash here only the TRUTH! And the solution to his problem listen and learn!

If you skip me I can't play!

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HomeAircraftHelicopterThunder TigerRAPTOR 90 › raptor 90 3d head grips
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