Today's Message Index:
----------------------
1. 05:07 AM - Re: Rotax 912 oil analysis (Catz631@aol.com)
2. 11:59 AM - Re: Re: Gearbox Bearing limits at the Flange (Richard Girard)
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: Rotax 912 oil analysis |
Paul,
I too have been doing oil analysis every 50 hrs. I have 450 hrs on my
engine. I have roughly 6-7 reports and the values go up and down so don't put
too much in one report. I will tell you though the silicone is dirt,so be
clean when you collect the sample. It takes very little to register that
value.
Dick Maddux
912 UL
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: Gearbox Bearing limits at the Flange |
Harbor Freight indicators don't have the range to do the job, IMHO. You
want something that has a resolution of at least .0001" to get accuracy at
the level you want it. Mitutoyo, Starret, Brown and Sharpe, Alina....Take
your pick.
As for an indicator mount, the Harbor Freight magnetic base is just fine
for $10 AND you can unscrew the post from the magnet and screw it right
into any of the M8 bosses on the propeller gearbox. Makes for a very steady
mount for the indicator.
Rick Girard
On Sun, Mar 26, 2017 at 4:04 PM, Lyle Peterson <lyleap@centurylink.net>
wrote:
> lyleap@centurylink.net>
>
> Jon,
>
> I think you really need to beg, borrow or buy a dial indicator. Using tha
t
> you will get a definitive indication of the real play both radially and
> axial in the gear box. Get a dial indicator and a mount of some sort.
> Magnetic mounts are handy but there may not be any steel near enough to u
se
> one. You may have to remove a bolt and put some sort of bracket under th
e
> bolt. The mount has to be stable so the flexing of it doesn't give false
> readings.
>
> Harbor Freight has both indicators and mounts. Northern Tool may have
> them too if you want to spend more money. You could go to a machine tool
> supply and get a Starrett if you want to spend some real money.
>
> Lyle
>
>
> On 3/26/2017 1:41 PM, italianjon wrote:
>
>> jon.catilli@gmail.com>
>>
>> Hi both,
>>
>> Thanks for the info. I went back out to the plane in the afternoon and
>> tried to be a bit more specific on the amount of play.
>>
>> I am not fully convinced that there is the previously mentioned
>> up/down/left/right play. I can't be sure whether I am slightly rotating
the
>> propeller as I do the test, and therefore I can't be sure is if what I f
eel
>> is actually just the play in the gears on through the rotation axis.
>>
>> But, Roger to answer your questions: It's the 80Hp, with 1090 hours on
>> it, the engine is from 1995, and it does have the overload clutch fitted
in
>> the gearbox. No strikes, and Aeroshell Sport plus 4, changed annually or
50
>> hours. Normally run on Mogas, but has had Avgas.
>>
>> Returning to the play, I can be sure that there is forward/backward play
.
>> It's not easy to measure, so I have to guess at about 0.2 to 0.3 mm.
>>
>> Also, what I was trying to do today, was install a Warpdrive Propeller,
>> in place of my Arplast PV50. The reason is that I have a low frequency
>> vibration that you can feel in flight, at the rudder pedals and if you
>> place your hand on the fuselage, and I wanted to fly with another propel
ler
>> to check if it remains, and therefore indicates the propeller... but for
>> love nor money, I can not dynamically balance a brand new warpdrive, I g
et
>> 0.3 to 0.4 IPS whatever I try to do...
>>
>> The Arplast is balanced better, but there is a large mass difference
>> between the propellers, and this is leading me to think that the source
of
>> the vibration is somewhere else and not directly the propeller. Just tha
t
>> the extra mass of the Arplast helps somehow...
>>
>> I think I'll get the gearbox looked at, but any ideas with the extra inf
o
>> above?
>>
>> Best
>>
>> Jon
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=467643#467643
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
===========
===========
===========
===========
===========
>
>
--
=9CBlessed are the cracked, for they shall let in the light.=9D
Groucho Marx
<http://www.goodreads.com/author/show/43244.Groucho_Marx>
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! --
|