Today's Message Index:
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1. 02:47 PM - bearing slop (rueffy@jetthrust.com)
2. 02:50 PM - Re: bearing slop (Hinde, Frank George (Corvallis))
Message 1
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--> Stratus-List message posted by: rueffy@jetthrust.com
Hi Larry and all other followers. Managed to get out to the plane today and do
some more investigating. Its definately not the prop - I pulled it off and
tried my wiggle experiment while the base was held firmly and there is no play
in any of my blades - thats good news as far as I am concerned - at least I am
not grounded.
So I put the prop back on and tried it again paying close attention to the upper
pulley and im pretty sure it is the bearings I can feel. I managed to get the
same effect with the prop off by grabbing each side of the upper pulley and
apply a small twisting force in each direction - I can feel the play if I get
it just right. I can also replicate it by grabbing the bases of two blades
with the prop on and applying a similar twisting/rocking force and I can feel
the tiny bit of play.
Guess I will go ahead and order some replacement bearings and see if that will
fix the problem.
Brett
BC, Canada, where it snowed to the 1000ft level and sent freezing rain to sea
level last night - in the middle of april!!!
Quoting Larry McFarland <larry
mc@qconline.com>:
> --> Stratus-List message posted by: Larry McFarland <larrymc@qconline.com>
>
> Brett,
> I believe Warp Drive means no movement between the composite and the
> clamping hub, but the take-up
> you feel at the redrive shaft could be nothing more than bearings
> setting cool within the housing. I'd bet you
> would find that when they are warm, and you know they do get "warm", the
> tolerences change as they cool, or
> perhaps the redrive housing has broken in a bit. I'd get a dial
> indicator on the hub and measure the exactitude
> of the play you find both diametral and axial. If you do that, I'll do
> the same and we might learn what or how
> much "play" is normal.
>
> Question though. How do you like the 72" on the Stratus? I'm using a
> 70" and would think you'd be getting a
> really good climb or cruise with yours.
>
> Larry McFarland
>
>
> rueffy@jetthrust.com wrote:
>
> >--> Stratus-List message posted by: rueffy@jetthrust.com
> >
> >Hey Soobers. Im scrating my head and not coming up with much (which is not
> >unusual for me). I have a 72" 3 blade warp drive on the EA81. When I take
> the
> >end of the prop blade, and wiggle gently from side to side I can get a tiny
> bit
> >of play (were are talking very very small barely noticable amount at the
> hub
> >somewhere) It has been bugging me for ages exactly where the play was. I
> >thought it was in a particular blade but then I tried something - if I
> place
> >one hand behind the prop hub and pull so the hub is firmly supported and
> then
> >wiggle - there is no play. So now I am thinking it might be a tiny bit
> play
> >somewhere else that is transfering though the hub and blade. Would it be
> >possible that the tiny movement I am feeling is coming from in the PRSU
> where
> >the prop shaft fits in its sleeve? I haven't had this PRSU apart yet so I
> am
> >not sure of the exact deisgn and tolerances. That would make more sense
> >because I have inspected the prop very carefully and cant find signs of
> wear.
> >The engine is coming up to 300 hours soon and is due for the bearing
> re-grease.
> >
> >
> >I emailed Warp Drive and asked and they said no movement is allowed
> (between
> >blade and hub).
> >
> >Ideas?
> >Brett
> >
> >
> >
> >
>
>
>
>
>
>
>
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Message 2
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--> Stratus-List message posted by: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com>
Brett,
You can get those bearings (and a belt if the time is right) from your
local bearing supplier. They are very common bearings and usually
available the same or next day.
Frank
-----Original Message-----
From: owner-stratus-list-server@matronics.com
[mailto:owner-stratus-list-server@matronics.com] On Behalf Of
rueffy@jetthrust.com
Subject: Stratus-List: bearing slop
--> Stratus-List message posted by: rueffy@jetthrust.com
Hi Larry and all other followers. Managed to get out to the plane today
and do some more investigating. Its definately not the prop - I pulled
it off and tried my wiggle experiment while the base was held firmly and
there is no play in any of my blades - thats good news as far as I am
concerned - at least I am not grounded.
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