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HelicopterMain Discussion › Still got Problems
06-07-2004 12:26 AM  13 years agoPost 1
Dr.Phil

rrApprentice

Oslo, Norway

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After problems with the pinion on my Raptor 50V2, I changed it and assembled the heli.
The noise and vibration were gone and I flew a couple of tanks.
Went home and noticed that there was some resistance when I turned the Start Coupler.
I could also hear scratching sound.
Dissasembled the Rappy again, and the clutchbell had scratches in it!
The clutch seemed fine, but there was some uneven wear on it (just the colour).
Just bought new start shaft and new bearings

Should I change the clutchbell (and maybe clutch) as well??

Guess this damage happened because of pinion/bearing problem.

And one other thing; when I put the new starter shaft in the clutch I feel some resistance.
Is this normal?

The Raptor has never been crashed.


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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06-07-2004 01:23 AM  13 years agoPost 2
blakka_1

rrElite Veteran

London/Enfield

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lol dont worry about those scratches on the top of the clutchbell dude, ive had those on 3 of my previous bells, they will be fine, im even flying one now, no problems.

just make sure your clutch is not damaged and that the clutch shoes are not opened out.

the scratches on the clutch bell are minor.

go fly

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06-07-2004 08:19 AM  13 years agoPost 3
vwalk

rrNovice

e.b.o.p New Zealand

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Hi Dr Phil,loosen the motor bolts & move it around until the start shaft has no tight spots whilst turning in disengaged direction.Tighten & test again.

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06-07-2004 11:04 AM  13 years agoPost 4
Dr.PhilrrApprentice - Oslo, Norway - My Posts: All  Forum  Topic

Janek, the washer is not on the crankshaft.

vwalk, I feel this resistance (more like a soft rub against metal) when the engine is Out of the heli.
Can it be the oneway bearing in the clutch?

This is how my clutchbell look like. Should this be changed?

Oh. and how can I make the picture in the post as a thumbnail


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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06-07-2004 11:48 AM  13 years agoPost 5
capebob

rrVeteran

Cape Coral, FL

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Janek is right! No washer between the engine and the fan. With the washer in place and if you have a hot start the clutch bell may, and I've seen it happen, fail if you have a hot start. When the clutch bell fails one or both of the clutch shoes will be flung off at a very high speed and it will be very hot. Fortunately, it missed the pilot at our field that it happened to. Dr. Phil, please remove the washer.

Bob

Success is the ability to go from one failure to another with no loss of enthusiasm. Churchill

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06-07-2004 11:55 AM  13 years agoPost 6
Dr.Phil

rrApprentice

Oslo, Norway

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I have never installed this washer, so this is not the problem!

There were no scratches on the bell untill after the change of pinion.
So all this damage was cased by just two flight!
The previous 70 flights had none of these problems


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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06-07-2004 02:14 PM  13 years agoPost 7
Dr.Phil

rrApprentice

Oslo, Norway

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Hi Janek.
Thanks for your replies!!

Yes, I removed the washer as I used Raptortechnique to assemble the helicopter.
The strange part is that after 70 flights the bell looked new.
But after my last assembly it took only 2 flights to make this damage.
I am using the stock fan.
The pinion was tight, and didn't seem loose at all.

Besides if the engine was installed a little crooked, or it was a bearing problem are there any other things I should check out?


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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06-07-2004 02:34 PM  13 years agoPost 8
armageddon

rrVeteran

N. Y.

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I would make sure that the bell is not too low.. I had a hard time
on one of my rappy as the shaft for the bell would not go all the way
through the bearing... I had to sand the shaft until it fits...

:

WHAT SIGNATURE?

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06-07-2004 03:41 PM  13 years agoPost 9
Dr.Phil

rrApprentice

Oslo, Norway

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Just added a few pics in my gallery of the engine and fan.
Janek, it is a TT50 engine


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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06-07-2004 04:21 PM  13 years agoPost 10
Dr.Phil

rrApprentice

Oslo, Norway

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Thanks again Janek.

Yeah.. that was the old pinion

Didn't use locktite on the pinion bearing first time, but I'll do it this time.
I didn't take the frame apart when I change the pinion, just took out the screws and gently pulled the frames apart so I could get the pinion and bearings out.
I am getting a new bell and assemble it again using your "check-list"


Philip
Rave ENV, Stratus BW,Trex700 V-bar,Furion450
www.airheads.no,Team Hobby24

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06-07-2004 04:34 PM  13 years agoPost 11
blakka_1

rrElite Veteran

London/Enfield

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You should definately be worried about these scratches on the clutch bell
weird , i have used a scratched clutch bell for nearly a year now, i havent had any problems. maybe im just lucky.

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HelicopterMain Discussion › Still got Problems
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