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  #1  
Old 06-12-2011, 03:35 PM
Bruce's Avatar
Bruce Bruce is offline
 
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Location: Anywhere, USA
Posts: 1,132
Talking High Oil Temps----Problem Solved

After 1 year and 111 hours WE finally solved my high oil temp problem.

Here is my setup first.

ECi-IO-360
James Cowl
James Plenum
Vetterman 4 pipe
7--A

After much debating my test flight after annual my OT was 230*.
Had to get it fixed because it was only 95* OAT so we put our heads
together and made the final decisions on the plane.

1st---Cut lower tunnel on the lower cowl and extend down 2.5 inches.
This would give me 35 sq inches more of exit air.

Cut, Reglassed and sanded.

2nd---Remove the brackets holding the lower cowl halves together.

3rd---take 2 pieces of .050, couple of platenuts to hold the two cowl halves
together. Put on the forward nose gear cutout cover in place and then
put the upper nose gear fairing on.



Test fly---------185* WOW

Thanks to Glider,Rooster and Woody for all the help and knowledge.

Boomer
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Kathy (KAT) Pauley

RV 7A--"MISS MARIE"--- N177WD (SOLD FLYING)72742
VAF #582-----------------EAA LIFETIME MEMBER
EX -KC-135A -------------BOOM OPERATOR #3633
VAN'S FLIGHT------------#6930

See you in OSHKOSH


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  #2  
Old 06-12-2011, 05:59 PM
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russd russd is offline
 
Join Date: Sep 2008
Location: Wellington, CO
Posts: 33
Default Looking for cooler temps

Great news, Bruce. Sounds like I might benefit from similar surgery. Got any pictures to share? It would make the big cut a little less stressful.

I've tried to clean up everything I can on top but there is so much "junk" in the way of the exit, it seems like a good place to look next.

ECi-IO-320
Van's Cooler
James Cowl
James Plenum
Vetterman crossover
9--A
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  #3  
Old 06-12-2011, 07:29 PM
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Bruce Bruce is offline
 
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Default

Russ,

I will try to load some pics.

Pretty easy cut. Leave about 1 inch of the top exit tunnel and
then cut about 12 inches forward. Put some blocks to hold the
2.5 inches and then glass with the cowl on. I cut it on the plane
and then glassed it in.

Pretty happy about the results and did not cost much.
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Bruce (BOOMER) Pauley
Kathy (KAT) Pauley

RV 7A--"MISS MARIE"--- N177WD (SOLD FLYING)72742
VAF #582-----------------EAA LIFETIME MEMBER
EX -KC-135A -------------BOOM OPERATOR #3633
VAN'S FLIGHT------------#6930

See you in OSHKOSH


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  #4  
Old 06-12-2011, 07:39 PM
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Default



Uploaded with ImageShack.us

Here is the before pic.

Note the flow marks on the oil on the bottom of the plane.
There are swirl marks going back into the cowl.
On the new setup these marks are gone.

There is a tuft film somewhere on the sight that shows the air
going back into the cowl on an A model.
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Bruce (BOOMER) Pauley
Kathy (KAT) Pauley

RV 7A--"MISS MARIE"--- N177WD (SOLD FLYING)72742
VAF #582-----------------EAA LIFETIME MEMBER
EX -KC-135A -------------BOOM OPERATOR #3633
VAN'S FLIGHT------------#6930

See you in OSHKOSH


http://www.mykitlog.com/users/index....ley&project=84


=VAF= 2006-2020 DUES PAID
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  #5  
Old 06-12-2011, 08:53 PM
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russd russd is offline
 
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Default Thanks...

Your "before" picture looks way too much like my "now" picture - even down to the oil swirl patterns! I take it the louvres weren't as effective as the added exit air opening (or are they still in use)?
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  #6  
Old 06-13-2011, 09:00 AM
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Janekom Janekom is offline
 
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Location: South Africa
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Default

Well I am glad that you have fixed it.
Looking at the picture I have to ask the following:

What effect will the hole in front of the gear leg have - can it increase the bottom cowl pressure and lessen the pressure differential and therefore also the cooling?

The four pipes coming out - what effect will this have on the cooling as it surely reduces the outlet area. I guess that is why you have lowered the tunnel part.
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  #7  
Old 06-13-2011, 01:01 PM
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pierre smith pierre smith is offline
 
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Location: Louisville, Ga
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Default Along those same lines...

Quote:
Originally Posted by Janekom View Post
......The four pipes coming out - what effect will this have on the cooling as it surely reduces the outlet area. I guess that is why you have lowered the tunnel part.
I wonder if the four-into-one exhaust helps the cooling since it's only one pipe instead of the usual two...even less restriction for the exiting air.

Best,
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Air Tractor AT 502B PT 6-15 Sold
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  #8  
Old 06-13-2011, 05:30 PM
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Bruce Bruce is offline
 
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Uploaded with ImageShack.us

Here is the 2.5 inch cut. Cut all the way forward till you can pull
down and glass.

I will get a pic of the back as soon as I go back to the 140* hangar
and get one


Oil Cooler is SW 8607 --??

Janekom---
I have not covered the louvers and test flown it that way yet.
The cover on the front of the nose gear blocked the exit flow that
was going down the nose gear leg and out the bottom on top of
the nose gear fairing. Some have seen this and that is pushing
the air out the front. I am trying to get ALL the air going out
the back of the cowl.

The 4 pipe took up a lot of space. Some of them are level and mine
are slightly stacked. Flat might have been better but it is what it is.
All of the 35 inches of exit air came below the exhaust pipes.
I took it to within 1/2 inch above the pipes. Wanted the exit air to keep
pushing the exhaust gases.
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Bruce (BOOMER) Pauley
Kathy (KAT) Pauley

RV 7A--"MISS MARIE"--- N177WD (SOLD FLYING)72742
VAF #582-----------------EAA LIFETIME MEMBER
EX -KC-135A -------------BOOM OPERATOR #3633
VAN'S FLIGHT------------#6930

See you in OSHKOSH


http://www.mykitlog.com/users/index....ley&project=84


=VAF= 2006-2020 DUES PAID
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  #9  
Old 06-14-2011, 05:50 AM
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F1Boss F1Boss is offline
 
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Default SARL question

Hey Boomer:

Did you see any change in speed?

Carry on!
Mark
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  #10  
Old 06-14-2011, 04:48 PM
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Bruce Bruce is offline
 
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Default

5 KNOT INCREASE of course.
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Bruce (BOOMER) Pauley
Kathy (KAT) Pauley

RV 7A--"MISS MARIE"--- N177WD (SOLD FLYING)72742
VAF #582-----------------EAA LIFETIME MEMBER
EX -KC-135A -------------BOOM OPERATOR #3633
VAN'S FLIGHT------------#6930

See you in OSHKOSH


http://www.mykitlog.com/users/index....ley&project=84


=VAF= 2006-2020 DUES PAID
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