REFLECTOR: Franklin Oil Cooler Bypass Spring

Scott Derrick scott at tnstaafl.net
Tue Jun 26 10:13:53 CDT 2012


Did you check the oil pressure spring to see if they were accidentally 
swapped during assembly?

-------- Original Message --------
Subject: Re: REFLECTOR: Franklin Oil Cooler Bypass Spring
From: John Dibble <aminetech at bluefrog.com>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Date: 06/26/2012 08:50 AM

> Brian,
>
> I sent you an email that I want one of your springs. Let me know if you
> got it. Thanks.
>
> A detailed examination of the spring seems to indicate that the spring
> is actually the spring for the oil pressure by pass which is a bit
> longer and 4 X stronger than the cooler by pass spring. I'm wondering if
> this spring was installed intentionally or by mistake. If intentional,
> what was the reason. Guess I'll find out when I replace with the correct
> spring.
>
> John
>
> On 6/25/2012 9:51 AM, Brian Michalk wrote:
>> Yes, I do.
>>
>> On 6/25/2012 9:07 AM, John Dibble wrote:
>>> Grover,
>>>
>>> Thanks. I just spoke with Robert and he told me that the standard
>>> spring measures 1 7/8" so I think I have the wrong spring. He only
>>> has the standard springs.
>>>
>>> Brian, do you have any more of the stronger cooler bypass springs?
>>>
>>> Thanks,
>>>
>>> John
>>>
>>> On 6/24/2012 11:50 AM, Grover McNair wrote:
>>>> That is definitely mal formed compared to mine.
>>>> Grover McNair
>>>>
>>>> Sent from my iPhone
>>>>
>>>> On Jun 24, 2012, at 11:05 AM, John Dibble<aminetech at bluefrog.com>
>>>> wrote:
>>>>
>>>>> Examining my oil cooler bypass spring, it's a bit compressed at
>>>>> each end (see pic). Also it seems too long and maybe that's why
>>>>> it's distorted. It measures 2" and would probably be a bit longer
>>>>> if the ends weren't compressed. According to my records, it is the
>>>>> stronger spring, PZL 26.11.1252. Can anyone tell me if mine is the
>>>>> correct length? Has anyone checked their spring for compression? I
>>>>> have excellent oil cooling and I'm leaning toward not replacing as
>>>>> a new spring would be a bit longer and probably get compressed anyway.
>>>>>
>>>>> Thanks,
>>>>> John
>>>>> <cooler bypass spring.jpg>
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>>
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>
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