Piper Forum > Piper Models > Cubs > Airwolf Oil Chiller For O-200
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Old 07-29-2017, 10:07 PM   #21
magman
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Suggest you find out about Baffles when operating on Floats.

Banner Tug guys may help also.


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Old 07-30-2017, 12:21 PM   #22
johnggreen
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Magman,

Won't have to worry about floats. That being said, Attley Dodge's STC was done specifically for that purpose.

Jim,

I included two pics, one of the spider intake/carburetor area, the other of the oil filter placement. Obviously, I don't have a baffle under there. I'm having trouble picturing in my mind what it would look like and how it would be installed. And by the way, do you live in the MS Delta now? If so, we aren't far apart.

Yesterday, after chores at the ranch, I went by the airport and took these pics. A friend of mine from the Jackson FAA office was there at another friend's hangar working on his 195. He was nice enough to go down and study the Cub's engine compartment relative to this oil temp issue. He has every rating known to man, including his IA, 22,000 hours and experience that most people only dream about.

Looking at the oil filter, you can see a air tube hole, now plugged, just above the oil filter in the back of the engine baffling. I'm going to open that hole and fit a 90 degree vent ducting air directly onto the oil filter to see if there is any change, Then, install the oil chiller with the air ducted onto it. If I get a 10 degree drop, I'll be satisfied. If not, the area just above and to the side of the oil filter on the back of the engine baffling will hold an oil cooler. Then, it's a matter of figuring out ports and routing.

Jgreen


IMG_1334.jpg   IMG_1336.JPG  
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Old 07-30-2017, 01:38 PM   #23
magman
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Whether YOU are on floats is not the concern.

Some Aircraft have some type of REQUIRED Equipment when operated

on Floats.

This is called out in the TCDS.

Banner guys fly with higher power @ slower speeds.

This means Hotter Engines.

They can be clever.

Have you checked the obvious?

Compression

Mix too Lean

Timing

Any of these can give you high OT.
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Old 07-30-2017, 04:16 PM   #24
JimC
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The Delta covers a LOT of areea. I live near the northern end of it now. Used to live in Greenwood.

Magman is spot on on about the floatplane and banner cooling.

There are several things you can do to improve your cooling.
In no particular order and non-inclusive
1) increase the fore/aft length and depth of the outlet lip by adding a band to it.
2) install the under case duct
3) remove that oil filter (it lowers oil pressure and flow rate - particularly to the valve train on the right bank due to the oddball O-200 oil flow path). Lower flow rate results in hotter oil.
4) if you don't install the under case duct, close off its inlet in the nosebowl so you won't presurise the lower plenum
5) install the intercylinder baffles if you haven't already.
6) reshape the nosebowl cylinder cooling inlets to optimise the flow - the stock profile is crappy.
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Old 07-31-2017, 11:15 PM   #25
sierrakilo99
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We just installed a new O-200 on our Cessna 150 and we got a complete baffle set from Airforms in AK. This is a link to the 150 set, take a look at these parts:

Right side:
http://www.airforms.biz/index.php?ro...product_id=639

Left side:
http://www.airforms.biz/index.php?ro...product_id=638

Big picture:
https://www.airforms.biz/index.php?r...product_id=637

I think these are the 'under case duct' parts that Jim's discussing. They mount to the underside of the engine case by way of the oil drainback / pushrod tube housings at the bottom of the engine case.

The intercylinder baffles are in the 'big picture' link too.

sk
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Old 08-01-2017, 02:25 AM   #26
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Note that the intercylinder baffles are used on an 11, but omitted on a 3.
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Old 08-01-2017, 11:31 AM   #27
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Thanks for the links. I will check them out.

Jgreen


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