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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Woodruff key check  [FlyRotary] Re: Oil pressure again
Date: Mon, 27 Aug 2012 09:40:19 -0400
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Agree with Mark - check woodruff key

Here was my experience with it

Ed

> Chris, having had some experience with that problem (the only problems I 
> haven't had experience  with is turbo related {:>).
>
> A couple of things - one of course, is the possibility of the "O" ring 
> slipping out of place, bad oil pump, oil regulator, etc.
>
> However, one thing that nearly bit me is I flew for 10 hours without the 
> woodruff key in the oil pump shaft.  The nut torque was holding it in 
> place until I had a start (with throttle Wide open on a cool morning with 
> 50 W oil) which broke the nut torque loose - when taxing out for take off 
> at Tracy's but could get oil pressure above 25 psi - so aborted the 
> planned take off.  Finally took the oil pan off only to hear some 
> "clinking" in the pan.  As soon as I picked it up the metal object , I 
> knew what the problem was.
>
> Apparently  while I had inserted the key, when I pushed the gear sprocket 
> on the shaft I push the key out fall enough to catch it between the 
> sprocket and aluminum pump housing when I torqued the nut (the impression 
> of the key was in the pump housing).  So if didn't fall into the pan or 
> out on the bench where I might have noticed it.  However, once the engine 
> fire up for the first time it threw the key into the pan.
>
> Fortunately leaving the throttle Wide Open and forgetting to close it 
> before engine start caused the engine to zoom to 5500 rpm and the 50 
> weight oil apparent cause the nut to lose its grip and although I didn't 
> really believe I had an oil problem (thought it was probably the sensor) , 
> I just couldn't talk myself into taking off - fortunately.
>
> Ed
>
> Edward L. Anderson
> Anderson Electronic Enterprises LLC
> 305 Reefton Road
> Weddington, NC 28104
> http://www.andersonee.com
> http://www.eicommander.com
>
>
> So just add woodruff key to your checklist if its not already there.
>
> Ed
>
> --------------------------------------------------
> From: "Chris Barber" <cbarber@texasattorney.net>
> Sent: Sunday, August 26, 2012 2:29 PM
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: Oil pressure again
>
>> I don't think it is the sensors as I have two and the drop is consistent 
>> on both. I have both the RWS sensor and the Dynon.   It seems to be 
>> having trouble getting in the mid 20 psi range.
>>
>> I have a busy week so I think I am about to order new oil pump and O-ring 
>> and spacer  Hopefully it will arrive about the time my time frees up  I 
>> figure it can't hurt and that will pretty much make everything in the 
>> engine new except the rotors and e-shaft.
>>
>> Chris
>>
>> Sent from my iPhone 4
>>
>> On Aug 26, 2012, at 1:15 PM, "Bobby J. Hughes" <bhughes@qnsi.net> wrote:
>>
>>> Chris
>>>
>>> How much has it dropped? Could it be the sensor? I had one fail early in 
>>> phase 1. Every time I pitched up the pressure would drop and trigger an 
>>> alarm.
>>>
>>> Bobby
>>>
>>>
>>> Sent from my iPad
>>>
>>> On Aug 26, 2012, at 9:11 AM, "Chris Barber" <cbarber@texasattorney.net> 
>>> wrote:
>>>
>>>> My oil pressure has dropped again. I am jumping to the conclusion it is 
>>>> that pesky front cover O-ring. I know I was meticulous with installing 
>>>> it last time. While it may be something else, I doubt it. I had the 
>>>> pressure valve fall into the pan a couple of years ago and it is now 
>>>> safety wired in. Perhaps it is the oil pump but it seems so simple and 
>>>> not prone to failure.
>>>>
>>>> So, to make this more than a vent, as I know mostly how to address 
>>>> this....contrary to the evidence that I am having to screw with it 
>>>> again, is there any words of wisdom y'all would care to share. Since I 
>>>> will at least have the front cover off (should be able to do do with 
>>>> engine on the plane) would this be a good time to replace the oil pump. 
>>>> It has not been replaced in the past do it is many years old with an 
>>>> unknown number of miles. Is there a "better" oil pump out there than 
>>>> the turbo version offered by Mazdatrix that I should ponder?
>>>>
>>>> I may have the oil ring and plastic retaining ring already if I can 
>>>> find them. Just gotta find the time to crack into it.  Then to continue 
>>>> my turbo diagnosis. Great power without intercooler (even though I 
>>>> found no restriction, but it is a super cheap intercooler from eBay) 
>>>> and blow off valve or even N/A. Obvious limited breathing with the 
>>>> cheap intercooler and blow off valve
>>>>
>>>> TIA.
>>>>
>>>> Chris Barber
>>>> Houston
>>>>
>>>> Sent from my iPhone 4
>>>> --
>>>> Homepage:  http://www.flyrotary.com/
>>>> Archive and UnSub: 
>>>> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>>
>>> --
>>> Homepage:  http://www.flyrotary.com/
>>> Archive and UnSub: 
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>>
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub: 
>> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>
>>
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