Mailing List flyrotary@lancaironline.net Message #63765
From: Christian christamarmc@gmail.com <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: overheating issue
Date: Sun, 5 Nov 2017 08:11:02 +1000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Hi Steve
No worries, unfortunately u don't need much, but it will only seem to surface the more pressure you run (higher rpm and heat etc)
You shouldn't have any bubbles at all once warm, I can leave my cap off my engine whilst warm and running and I see nothing now.
All learnt from experience, but in saying that I wouldn't be keen to pull down your engine either until it really was a problem. ( running way to hot etc)
Hope this helps.

Cheers

Sent from my iPad

On 4 Nov 2017, at 7:02 pm, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:

>> Hi Christian
>> Not very much in the way of bubbles. Small amount of very small 0.5mm bubbles.
>> Nothing compared to what Ive seen from head gasket trouble in pistons.
>> Thanks
>> Steve
>
>
>> On 4 Nov 2017, at 4:37 pm, Christian christamarmc@gmail.com <flyrotary@lancaironline.net> wrote:
>>
>> Hi Steve
>> Unfortunately yes, if leaking gases into the water it will get hotter,
>> When it's being run can you see bubbles arising in the overflow tank, may only present itself when it warms up.
>> Neil unfortunately just had this issue with a newly rebuilt motor.
>> I've also had this issue, I then swapped to tracy,s seals.
>>
>> Hope this helps.
>> Cheers
>> Christian
>>
>> Sent from my iPad
>>
>>> On 4 Nov 2017, at 5:45 pm, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
>>>
>>> Hi guys
>>>
>>> Our 4 port renesis in the Glasair has begun to get hotter.
>>> We have been taxi testing and noticed temps rising higher than previously seen.
>>> Unfortunately also noticed a tiny weep of water and the tiniest bubble appear between the rotor housing and rear plate yesterday.
>>> So looks like o ring failure maybe beginning.
>>>
>>> Do rotaries overheat as a result of an o ring failure?
>>> Ive pressure tested it and it will hold ~10psi for half an hour.
>>> What are the important issues re overheating in rotaries?
>>>
>>> Thanks
>>>
>>> Steve Izett
>>> Glasair Super II RG Renesis 4 port RD1C
>>>
>>>
>>>
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>
>
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