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09-05-2003 08:22 AM  14 years agoPost 1
seatown

rrNovice

Seattle WA

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I have a se99, last year I had a bad crash in some gravel it hit the head hard,after I got it back together $385 later it would never fly the same,if I spool it up to my highest head speed and letting it sit on the ground give cyclic imput the blades fly out of track if I were to leave the disk tilted the heli would be no more, but with the cyclic stick neutral the blades couldnt be more in track.This is freaking crazy! to this day it hasnt stoped Ive replaced the whole frikin head,grips radial,thrust,retaining colar,pitch arms,orings,blades,I threw in all new ball links from the head down to the skids,I find myself staring at this thing for hours looking for anything loose out of place stuff related to the problem, about 2months ago I had the radio on checkin stuff and found the swashplate was slopped out not up/down but left/right front/back traced it back to the slopped out tired 2 year old 9202,s ive been using so I though thats it so I got some 9252's for the cyclic's and it worked no flutter when you give cyclic control.This lasted for 6 flights and then it came back bad as ever.The swashplate,and washout unit are all original a little worn but the seem fine.I have about 150 in parts trying to find the source but no luck Im tired of fu@$ing with it.Every shaft is brand new in the machine,Ive e-mailed all the reps int he area but they all ask about things Ive done allready maybe someone here has had this happen to them any advice would be great. Thanks,Jason.

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09-05-2003 11:04 AM  14 years agoPost 2
GM1

rrElite Veteran

Tallahassee, Florida US

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Hmmm........................

My first thought is that one of the thrust bearings is installed backwards, easy to check. Did you replace the head block and grips? While unusual to hurt one badly, if you hit inverted on the head, it can happen. Have you tried a different set of blades? These are my first thoughts.
Gordie

On a dog sled team, if you're not the lead dog, the view never changes.

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09-05-2003 04:45 PM  14 years agoPost 3
Bonsai

rrApprentice

Bacolod, Philippines

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Im no expert but I have seen people install the blade grips backwards. And that caused the blades to go out of track and act like they were fluttering. insure that the grip piviot arm in infront of the leading edge of the blades.

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09-05-2003 10:08 PM  14 years agoPost 4
3D-RC

rrApprentice

NY

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Did you check/change the feathering shaft? I have seen the same problem with a slightly bent shaft.

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09-05-2003 10:38 PM  14 years agoPost 5
mark fadely

rrApprentice

indianapolis, indiana

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seatown,

We have experienced the same problem here. We too changed thrust bearings and made sure all links had no slop but still had fluttering on the 99se. Turned out to be the blades. The 848 head with metal grips does not like some blades (and especially any longer than 680mm). If you can try someone elses blades, then try it. It just might be what the machine needs.

mark fadely

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09-06-2003 06:14 AM  14 years agoPost 6
seatown

rrNovice

Seattle WA

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Thanks for the replys,Ive taken that head apart at least fifty times checkin,replacing,looking.Im ruling out the head for now,and moving on down,the swashplate has a little slop but not much,Ive seem more in others, the links are all new so thats out, there is a little back/forth play in the roll servo cradle I think thats the design its been there since I first put it together,When the radio is on the new 9252's seem to give off a little slop transfering it to the swashplate is this normal?Ive only owned one set of 9252's.Thanks guys for all your time.Jason.

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