109-110 mainshaft shim

[chrismechanic]

hi guys,
             i have a gap under the maingear, the owb sleeve is not sitting on the lower support bearing.
if i loosen the mainshaft lock collar i get up/down play.
the gap looks to be about .50mm.
i have looked in the box/spare parts bag and there is no shim for the mainshaft.

my question is how thick is the 109-110 shim please?
chris.

[Scott Anderson]

The E5 doesn't assemble with a 109-110 shim , only two shim are on top and bottom of the auto-hub , the upper and lower collars take out the vertical play. Make sure the lower collar is installed with the boss upward and the upper collar downwards

[chrismechanic]

im aware the 109-110 shim is not for the e5, the heli is assembled correctly (bearing blocks and collars all correct)
also the owb shims are both installed.
but i still have a gap at the bottom above the lower mainshaft support bearing..
if i undo the mainshaft lock collar i get up & down movement of about .50mm.
chris

[Scott Anderson]

Ok yes that gap is between the auto-hub sleeve and the lower bearing. I think that small gap needs to be there the lower bearing block is supporting the bottom of the main shaft on mine the auto-hub and sleeve do not rest on the bearing.

[chrismechanic]

apparently some kits included a shim.. i need that one..

http://www.helifreak.com/showthread.php?t=540524

chris

[Scott Anderson]

Good find, I haven't seen that post. I have less than 1mm gap and been flying about a year that way no issues with it. Seems like yours with be fine without an extra shim.

The E7SE manual has 109-110 has an extra shim listed to go on top of the lower collar , I don't know the thickness of it. Almost looks like 0.5mm from the pictures in the Synergy Store

[flyalan]

Both of my E5's have about a 0.5mm space between the auto hub sleeve and the bottom bearing.  Once has been flying for over a year.  The other about 6 months...  No issues..  You do not need a shim.


Cheers

Alan

[chrismechanic]

thanks for the advice guys,
                                           i must admit i am a bit anal about things like this and i would rather see the bearing against the sleeve as this will take the strain away from the lock collar which moved on the maiden flight.

i have found some 10mm shims from a bag of shims i bought ages ago to shim up the diffs in my r/c monster truck.

i have one that is .30mm and one at .20mm so i will try them, i also have the option of turning up a shim in the lathe, but tbh parting off a .50mm shim in the lathe is not really the done thing and would give mixed results.
a shim is normally stamped out of sheet.

the heli is smooth but while in flight i get changes in the gearing noise.
it sounds like a fluttering noise, the sound changes as the load is taken off the motor then re-applied.

maybe the motor is floating up and down on its shaft or im just not used to the sound, the motor is quite loose against its bearings, i can pull it up and down a mill or 2.
for helical gears you really need 0 free play, or as near as you can get to 0 in both shafts.

i think i will shim the mainshaft first and fly, then shim up the motor and report back.

thanks,
chris

[chrismechanic]

a quick update,
i found that gap to be .40mm, .50mm made the owb too tight and caused some binding.
i used a .30mm and .10mm shim, it has also taken all the free play out of the owb drive bolt, i think this is better.
now we have windy weather so i cant go test it 
we have gusts around 30-50 mph... "sob"... i hope the wind drops for tomorrow.
im going to hit the sim today, any of you guys fly on phoenix??
chris

[flyalan]

Well good luck when you do get the chance to fly it..

I use Realflight..

Cheers

alan

[dpelletier]

im going to hit the sim today, any of you guys fly on phoenix??

I use both Phoenix and RF7... not much activity on RF7 online compared to Phoenix.

[flyalan]

Most folks are still flying RF6 and not 7.  Still plenty of activity on RF6.  Too bad they keep them separated out like that...

Cheers

Alan

[chrismechanic]

Well, the weather has been rubbish in the UK.
 Yesterday it rained all day, today we have more rain and strong winds..go away winter you suck.
Doh
Chris.

[dpelletier]

Most folks are still flying RF6 and not 7.  Still plenty of activity on RF6.  Too bad they keep them separated out like that...

I guess I'll just wait for others to catch up then 

[chrismechanic]

hi guys,
            i got a pack in yesterday, inbetween the showers we have.

im a bit worried about this noise i have, it sounds quite rough while in flight and the shim has made no difference.

i think the main gear has runout, at least thats what it sounds like.

one side the main gear the mesh is tight, the other side is alot more loose so i think that is the issue, i was expecting it to be alot less runout than it is.
ill run it up without blades later on and see if i can pin point where the sound is coming from.. 
chris.