Today's Message Index:
----------------------
1. 02:54 AM - Re: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins (Bob Leffler)
2. 03:43 AM - Re: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins (Patrick Pulis)
3. 04:43 AM - Re: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins (Bob Leffler)
4. 05:15 AM - Re: Rear Aft Case Baffle Modification to Enable More Airflow Around No. 5 Cylinder Fins (Michael Kraus)
5. 05:55 AM - Re: Rear Aft Case Baffle Modification to Enable More Airflow Aro (bill.peyton)
6. 07:03 PM - Re: New (Free) Aviation App (gbrasch)
7. 09:27 PM - Re: Re: New (Free) Aviation App (Kelly McMullen)
Message 1
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| Subject: | Re: Rear Aft Case Baffle Modification to Enable More Airflow |
Around No. 5 Cylinder Fins
I did this last summer and it took me awhile, but a small file is the only way
I know how to finish the filings smooth. I did use a long #30 bit to help remove
some of the mass. I had several fins that were almost completely block.
I also placed a couple washers on the screw that goes into the aft side of #5 cylinder.
This helped quite a bit as well by creating a small gap between the
cylinder and the baffle.
Bob
Sent from my iPad
> On Feb 15, 2015, at 1:06 AM, Patrick Pulis <rv10free2fly@yahoo.com.au> wrote:
>
> Could anyone please indicate if they have modified the Right Aft Case Baffle
(CB-1007A) to enable more airflow around the fins of the right rearmost cylinder
head fins?
>
> The No. 5 cylinder head fins are very shallow where they butt up against the
Right Aft Case Baffle and was thinking of modifying the case baffle to enable
more airflow around the cylinder fins.
> A friend has conducted this modification on his RV-6 and has reported reduced
rearmost cylinder head temperatures.
>
> As per Tim Olsons advice I am also filing out the cooling gaps between the fins
on each cylinder near the spark plugs. After shining a torch down there, some
of the fins are just showing an air gap due to the casting flash. If you've
also done this, is there an easier way to do this compared to using a very
narrow flat file?
>
> Warm regards
>
> Patrick
> <photo.JPG>
>
> <pre><b><font size=2 color="#000000" face="courier new,courier">
>
>
> </b></font></pre>
Message 2
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| Subject: | Re: Rear Aft Case Baffle Modification to Enable More Airflow |
Around No. 5 Cylinder Fins
Bob
Did you notice and change (i.e. reduction in CHT on #5) after filing out and enlarging
the fin holes and adding the washer?
I'm thinking of modifying the baffle itself to allow more air to flow around the
aft side of the #5 cylinder.
Warm regards
Patrick
> On 15 Feb 2015, at 21:22, Bob Leffler <rv@thelefflers.com> wrote:
>
>
> I did this last summer and it took me awhile, but a small file is the only way
I know how to finish the filings smooth. I did use a long #30 bit to help
remove some of the mass. I had several fins that were almost completely block.
>
> I also placed a couple washers on the screw that goes into the aft side of #5
cylinder. This helped quite a bit as well by creating a small gap between the
cylinder and the baffle.
>
> Bob
>
> Sent from my iPad
>
>> On Feb 15, 2015, at 1:06 AM, Patrick Pulis <rv10free2fly@yahoo.com.au> wrote:
>>
>> Could anyone please indicate if they have modified the Right Aft Case Baffle
(CB-1007A) to enable more airflow around the fins of the right rearmost cylinder
head fins?
>>
>> The No. 5 cylinder head fins are very shallow where they butt up against the
Right Aft Case Baffle and was thinking of modifying the case baffle to enable
more airflow around the cylinder fins.
>> A friend has conducted this modification on his RV-6 and has reported reduced
rearmost cylinder head temperatures.
>>
>> As per Tim Olsons advice I am also filing out the cooling gaps between the fins
on each cylinder near the spark plugs. After shining a torch down there,
some of the fins are just showing an air gap due to the casting flash. If you've
also done this, is there an easier way to do this compared to using a very
narrow flat file?
>>
>> Warm regards
>>
>> Patrick
>> <photo.JPG>
>>
>> <pre><b><font size=2 color="#000000" face="courier new,courier">
>>
>>
>> </b></font></pre>
>
>
>
>
>
Message 3
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| Subject: | Re: Rear Aft Case Baffle Modification to Enable More Airflow |
Around No. 5 Cylinder Fins
Most definitely! I think the drop was about 10f, but I would have to look at
my logs to get the precise drop. It went from being one of the hottest, to being
one of the coolest.
Bob
Sent from my iPad
> On Feb 15, 2015, at 6:40 AM, Patrick Pulis <rv10free2fly@yahoo.com.au> wrote:
>
>
> Bob
>
> Did you notice and change (i.e. reduction in CHT on #5) after filing out and
enlarging the fin holes and adding the washer?
>
> I'm thinking of modifying the baffle itself to allow more air to flow around
the aft side of the #5 cylinder.
>
> Warm regards
>
> Patrick
>
>> On 15 Feb 2015, at 21:22, Bob Leffler <rv@thelefflers.com> wrote:
>>
>>
>> I did this last summer and it took me awhile, but a small file is the only way
I know how to finish the filings smooth. I did use a long #30 bit to help
remove some of the mass. I had several fins that were almost completely block.
>>
>> I also placed a couple washers on the screw that goes into the aft side of #5
cylinder. This helped quite a bit as well by creating a small gap between the
cylinder and the baffle.
>>
>> Bob
>>
>> Sent from my iPad
>>
>>> On Feb 15, 2015, at 1:06 AM, Patrick Pulis <rv10free2fly@yahoo.com.au> wrote:
>>>
>>> Could anyone please indicate if they have modified the Right Aft Case Baffle
(CB-1007A) to enable more airflow around the fins of the right rearmost cylinder
head fins?
>>>
>>> The No. 5 cylinder head fins are very shallow where they butt up against the
Right Aft Case Baffle and was thinking of modifying the case baffle to enable
more airflow around the cylinder fins.
>>> A friend has conducted this modification on his RV-6 and has reported reduced
rearmost cylinder head temperatures.
>>>
>>> As per Tim Olsons advice I am also filing out the cooling gaps between the
fins on each cylinder near the spark plugs. After shining a torch down there,
some of the fins are just showing an air gap due to the casting flash. If you've
also done this, is there an easier way to do this compared to using a very
narrow flat file?
>>>
>>> Warm regards
>>>
>>> Patrick
>>> <photo.JPG>
>>>
>>> <pre><b><font size=2 color="#000000" face="courier new,courier">
>>>
>>>
>>> </b></font></pre>
>
>
>
>
>
Message 4
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| Subject: | Re: Rear Aft Case Baffle Modification to Enable More Airflow |
Around No. 5 Cylinder Fins
Adding a couple washers behind #5 (or behind #3 on a 4 cylinder engine) is a pretty
standard RV trick. It definitely reduces CHT on that cylinder. I learned
it on my RV-4, and did it again on my RV-10.
-Mike Kraus
Sent from my iPhone
> On Feb 15, 2015, at 1:06 AM, Patrick Pulis <rv10free2fly@yahoo.com.au> wrote:
>
> Could anyone please indicate if they have modified the Right Aft Case Baffle
(CB-1007A) to enable more airflow around the fins of the right rearmost cylinder
head fins?
>
> The No. 5 cylinder head fins are very shallow where they butt up against the
Right Aft Case Baffle and was thinking of modifying the case baffle to enable
more airflow around the cylinder fins.
> A friend has conducted this modification on his RV-6 and has reported reduced
rearmost cylinder head temperatures.
>
> As per Tim Olsons advice I am also filing out the cooling gaps between the fins
on each cylinder near the spark plugs. After shining a torch down there, some
of the fins are just showing an air gap due to the casting flash. If you've
also done this, is there an easier way to do this compared to using a very
narrow flat file?
>
> Warm regards
>
> Patrick
> <photo.JPG>
>
> <pre><b><font size=2 color="#000000" face="courier new,courier">
>
>
> </b></font></pre>
Message 5
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| Subject: | Re: Rear Aft Case Baffle Modification to Enable More Airflow |
Aro
To really fix it you need to increase the airflow behind the #5 cylinder. Ultimately
the only way I was able to get #5 in line with the rest of the cylinders
was to trim the front dams to around 1/3 of their original height and then to
modify the rear baffle by extending the stock slit to come up further on the
baffle and allow the straightening of the top bend to obtain a 1/8th inch gap
behind the #5 cylinder. I used RTV to fill in the gap created by the mod.
I ordered a new baffle piece to modify and install at the next annual to eliminate
the RTV. Below is the best photo I can find. I did not file any of the
fins, I just made sure there were no leaks. My CHT will rarely get to 400 in
a climb unless its over 90 degrees OAT., and that's only in an extended full throttle
climb. I typically climb out at 120kts.
--------
Bill
WA0SYV
Aviation Partners, LLC
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=438365#438365
Attachments:
http://forums.matronics.com//files/img_2898_158.jpg
http://forums.matronics.com//files/img_2898_154.jpg
Message 6
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| Subject: | Re: New (Free) Aviation App |
Wanted to update the list with the following, the Airport Courtesy Car app as of
this date has over 1300 listings nationwide with over 5000 pilots that have
downloaded the app. It continues to be covered by major publications. Since
AvWeb covered it and AOPA Pilot magazine in the February issue, it has most recently
been favored by G.A. News. Also I can now upload pictures of your favorite
crew cars to the state listings, so email those pictures to me at airportcars101@gmail.com.
And keep those entries coming!
--------
Glenn Brasch
RV-9A Flying
1952 Piper Tri-Pacer
Medevac Helicopter Pilot (Ret)
Tucson, Arizona
Owner, www.RVairspace.com and "Airport Courtesy Cars" Smart Phone App
www.RVairspace.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=438397#438397
Message 7
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| Subject: | Re: New (Free) Aviation App |
Glenn,
Any chance you might port this to the web or to a Windoze platform? There
are a few of us that don't use IOS or Android devices, still.
On Sun, Feb 15, 2015 at 8:01 PM, gbrasch <gmbrasch@gmail.com> wrote:
>
> Wanted to update the list with the following, the Airport Courtesy Car app
> as of this date has over 1300 listings nationwide with over 5000 pilots
> that have downloaded the app. It continues to be covered by major
> publications. Since AvWeb covered it and AOPA Pilot magazine in the
> February issue, it has most recently been favored by G.A. News. Also I can
> now upload pictures of your favorite crew cars to the state listings, so
> email those pictures to me at airportcars101@gmail.com. And keep those
> entries coming!
>
> --------
> Glenn Brasch
> RV-9A Flying
> 1952 Piper Tri-Pacer
> Medevac Helicopter Pilot (Ret)
> Tucson, Arizona
> Owner, www.RVairspace.com and "Airport Courtesy Cars" Smart
> Phone App
> www.RVairspace.com
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=438397#438397
>
>
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