Today's Message Index:
----------------------
1. 01:45 PM - Re: stories and questions. (rueffy@jetthrust.com)
2. 02:22 PM - Re: stories and questions. (Larry McFarland)
3. 04:42 PM - Re: stories and questions. (rueffy@jetthrust.com)
4. 06:15 PM - Re: stories and questions. (Larry McFarland)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: stories and questions. |
--> 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
Pilots!-For all your aviation resources visit
Jet Thrust.com- The Pilot Network
http://www.jetthrust.com
Please report IMMEDIATELY any abuse/spam or scams of our webmail system to
the webmaster of this website at the following address: webmaster@jetthrust.com
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: stories and questions. |
--> 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
>
>
>
>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: stories and questions. |
--> Stratus-List message posted by: rueffy@jetthrust.com
Thanks Larry,
I will do that but I will need to borrow the tool so it might take a couple of
weeks for me to get around to it and take the measurements. I haven't thought
to try it when hot, so I might warm up the engine and see if the same thing
happens.
I have to change the oil seal next week so I will have the prop off then and
while I have the prop off I will see if I can feel the play between the blade
and clamping hub. I agree with your definition of "no play" that warp drive
were getting at - that was what I meant but it may have been poorly worded. It
has been difficult to gauge and find the play because its only some blades, in
certain positions where I can feel it. Normally I just feel blade flex but if
I get it just right I can feel ever so slightly the unmistakable click click
feel as you move side to side and feel contact. Warp Drive said do not fly
until resolved, but they were refering to movement between the composite and
clamping hub, which I dont think I have, he seemed to think it may have been a
previous prop strike, but that is impossible - its only ever been on this float
plane.
As for the performance question - I find it great. Solo I can get 1500ft/min
which is great considering I am dragging 1500 floats into the air. Two people
is about 1000ft/min at 5250 which is as high as I have the engine set to Rev.
The blades are at 10 deg and cruise is about 85-90mph.
Also a question about the seal behind the flywheel. I think it was you larry
who wrote the guide that I have with the pictures. People have been using RTV
sealant when putting it in. My soob workshop manual says lithium grease on the
inside against the crack, and clean engine oil on the outside against the
housing. If you are using RTV sealant are you still using the oil - exaclty
where are you putting the RTV sealant? I have never used the stuff so I am not
totally sure how, why or where to apply it or what purpose it serves.
Cheerio
Brett
Quoting Larry McFarland <larrymc@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
> >
> >
> >
> >
>
>
>
>
>
>
>
Pilots!-For all your aviation resources visit
Jet Thrust.com- The Pilot Network
http://www.jetthrust.com
Please report IMMEDIATELY any abuse/spam or scams of our webmail system to
the webmaster of this website at the following address: webmaster@jetthrust.com
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: stories and questions. |
--> Stratus-List message posted by: Larry McFarland <larrymc@qconline.com>
Brett,
When you say click-click on only certain positions, I'd have to bet
you're feeling the rolling clearance within the bearings of your
redrive. With a little time, this could be expected when the hours say
you're near replacing them. Two bearings in tandem on a shaft would
probably do exactly what you describe at certain positions and have a
nearly imperceptible amount of slop on the thrust line.
On the small diameter o-ring seal seen inside the lower belt pully at
the crank end, I used RTV sealant behind it first, then added RTV to the
o-ring and packed it into place, because there is no relative motion on
this o-ring seal. The large diameter seal is pressed in place and white
lithium grease is added to the front face to keep it from abraiding.
I didn't write the instructions, or take the pictures, but I recieved
them from *Bill Morelli who did the hard work *before forwarding them on
to people like us. I've not had to remove my redrive bearings yet with
only 55 hours, but I do have spare sets of bearings, seals etc standing
by in my "consumables & spares" box.
Larry
rueffy@jetthrust.com wrote:
>--> Stratus-List message posted by: rueffy@jetthrust.com
>
>Thanks Larry,
>
>I will do that but I will need to borrow the tool so it might take a couple of
>weeks for me to get around to it and take the measurements. I haven't thought
>to try it when hot, so I might warm up the engine and see if the same thing
>happens.
>
>I have to change the oil seal next week so I will have the prop off then and
>while I have the prop off I will see if I can feel the play between the blade
>and clamping hub. I agree with your definition of "no play" that warp drive
>were getting at - that was what I meant but it may have been poorly worded. It
>has been difficult to gauge and find the play because its only some blades, in
>certain positions where I can feel it. Normally I just feel blade flex but if
>I get it just right I can feel ever so slightly the unmistakable click click
>feel as you move side to side and feel contact. Warp Drive said do not fly
>until resolved, but they were refering to movement between the composite and
>clamping hub, which I dont think I have, he seemed to think it may have been a
>previous prop strike, but that is impossible - its only ever been on this float
>plane.
>
>As for the performance question - I find it great. Solo I can get 1500ft/min
>which is great considering I am dragging 1500 floats into the air. Two people
>is about 1000ft/min at 5250 which is as high as I have the engine set to Rev.
>The blades are at 10 deg and cruise is about 85-90mph.
>
>Also a question about the seal behind the flywheel. I think it was you larry
>who wrote the guide that I have with the pictures. People have been using RTV
>sealant when putting it in. My soob workshop manual says lithium grease on the
>inside against the crack, and clean engine oil on the outside against the
>housing. If you are using RTV sealant are you still using the oil - exaclty
>where are you putting the RTV sealant? I have never used the stuff so I am not
>totally sure how, why or where to apply it or what purpose it serves.
>
>
>Cheerio
>Brett
>
>Quoting Larry McFarland <larrymc@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
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>>
>
>
>Pilots!-For all your aviation resources visit
>Jet Thrust.com- The Pilot Network
>http://www.jetthrust.com
>
>
>Please report IMMEDIATELY any abuse/spam or scams of our webmail system to
>the webmaster of this website at the following address: webmaster@jetthrust.com
>
>
>
>
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|