O-200 Exhaust ... Straight pipes or cross?


 

I have a few leads on a the O-200 exhaust pipes that cross underneath the engine and have one pipe out the cowling. But I read and heard in YouTube videos that with the straight out exhaust and 2 piples coming out the cowling, the temp inside the cowling stays lower, oil temp stays lower and I might not need an oil cooler.

Thoughts? Comments?
--
Robert "TheFrisco" Schmid
(408) 805-5450

www.facebook.com/TheFlyingFriscos
www.theflyingfriscos.com

Love building planes almost as much as flying. Latest completed build is "Loki", a Chinook Plus 2 bush plane.


Jay Scheevel
 

IMO, you will need an oil cooler.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Robert Schmid
Sent: Tuesday, May 10, 2022 2:40 PM
To: main@Q-List.groups.io
Subject: [Q-List] O-200 Exhaust ... Straight pipes or cross?

 

I have a few leads on a the O-200 exhaust pipes that cross underneath the engine and have one pipe out the cowling. But I read and heard in YouTube videos that with the straight out exhaust and 2 piples coming out the cowling, the temp inside the cowling stays lower, oil temp stays lower and I might not need an oil cooler.

Thoughts? Comments?
--
Robert "TheFrisco" Schmid
(408) 805-5450

www.facebook.com/TheFlyingFriscos
www.theflyingfriscos.com

Love building planes almost as much as flying. Latest completed build is "Loki", a Chinook Plus 2 bush plane.


Corbin
 

I got rid of my crossover exhaust system (probably still have it around) but haven’t fully tested my 2-1on each side yet to see a difference in cooling.  But the crossover definitely puts heat up in  front of the engine.  I kept my same  oil cooler.

Corbin

On May 10, 2022, at 3:40 PM, Robert Schmid <robert@...> wrote:

I have a few leads on a the O-200 exhaust pipes that cross underneath the engine and have one pipe out the cowling. But I read and heard in YouTube videos that with the straight out exhaust and 2 piples coming out the cowling, the temp inside the cowling stays lower, oil temp stays lower and I might not need an oil cooler.

Thoughts? Comments?
--
Robert "TheFrisco" Schmid
(408) 805-5450

www.facebook.com/TheFlyingFriscos
www.theflyingfriscos.com

Love building planes almost as much as flying. Latest completed build is "Loki", a Chinook Plus 2 bush plane.


--

Corbin 
N121CG


Mike Dwyer
 

On Tue, May 10, 2022, 4:40 PM Robert Schmid <robert@...> wrote:
I have a few leads on a the O-200 exhaust pipes that cross underneath the engine and have one pipe out the cowling. But I read and heard in YouTube videos that with the straight out exhaust and 2 piples coming out the cowling, the temp inside the cowling stays lower, oil temp stays lower and I might not need an oil cooler.

Thoughts? Comments?
--
Robert "TheFrisco" Schmid
(408) 805-5450

www.facebook.com/TheFlyingFriscos
www.theflyingfriscos.com

Love building planes almost as much as flying. Latest completed build is "Loki", a Chinook Plus 2 bush plane.


Sam Hoskins
 

A properly baffled O-200 doesn't normally need an oil cooler. Exception might be If you are consistently flying in , 95° ambient. 

Sam

On Tue, May 10, 2022, 3:55 PM Jay Scheevel <jay@...> wrote:

IMO, you will need an oil cooler.

 

Cheers,

Jay

 

From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Robert Schmid
Sent: Tuesday, May 10, 2022 2:40 PM
To: main@Q-List.groups.io
Subject: [Q-List] O-200 Exhaust ... Straight pipes or cross?

 

I have a few leads on a the O-200 exhaust pipes that cross underneath the engine and have one pipe out the cowling. But I read and heard in YouTube videos that with the straight out exhaust and 2 piples coming out the cowling, the temp inside the cowling stays lower, oil temp stays lower and I might not need an oil cooler.

Thoughts? Comments?
--
Robert "TheFrisco" Schmid
(408) 805-5450

www.facebook.com/TheFlyingFriscos
www.theflyingfriscos.com

Love building planes almost as much as flying. Latest completed build is "Loki", a Chinook Plus 2 bush plane.


Sam Hoskins
 

The cross over system is a maintenance nightmare. Two-into-one on each side is much more serviceable. 


On Tue, May 10, 2022, 3:40 PM Robert Schmid <robert@...> wrote:
I have a few leads on a the O-200 exhaust pipes that cross underneath the engine and have one pipe out the cowling. But I read and heard in YouTube videos that with the straight out exhaust and 2 piples coming out the cowling, the temp inside the cowling stays lower, oil temp stays lower and I might not need an oil cooler.

Thoughts? Comments?
--
Robert "TheFrisco" Schmid
(408) 805-5450

www.facebook.com/TheFlyingFriscos
www.theflyingfriscos.com

Love building planes almost as much as flying. Latest completed build is "Loki", a Chinook Plus 2 bush plane.


Jim Patillo
 

Yeah but…….4:1 sure sounds good on a fly by. Nice and quiet. 😊


From: main@Q-List.groups.io <main@Q-List.groups.io> on behalf of Sam Hoskins <sam.hoskins@...>
Sent: Tuesday, May 10, 2022 4:26:37 PM
To: main@q-list.groups.io <main@q-list.groups.io>
Subject: Re: [Q-List] O-200 Exhaust ... Straight pipes or cross?
 
The cross over system is a maintenance nightmare. Two-into-one on each side is much more serviceable. 

On Tue, May 10, 2022, 3:40 PM Robert Schmid <robert@...> wrote:
I have a few leads on a the O-200 exhaust pipes that cross underneath the engine and have one pipe out the cowling. But I read and heard in YouTube videos that with the straight out exhaust and 2 piples coming out the cowling, the temp inside the cowling stays lower, oil temp stays lower and I might not need an oil cooler.

Thoughts? Comments?
--
Robert "TheFrisco" Schmid
(408) 805-5450

www.facebook.com/TheFlyingFriscos
www.theflyingfriscos.com

Love building planes almost as much as flying. Latest completed build is "Loki", a Chinook Plus 2 bush plane.


 

Agreed, and straights sound more like a Formula 1 flyover 😂
--
Robert "TheFrisco" Schmid
(408) 805-5450

www.facebook.com/TheFlyingFriscos
www.theflyingfriscos.com

Love building planes almost as much as flying. Latest completed build is "Loki", a Chinook Plus 2 bush plane.


John Hartley
 

How about a 4:4 system with stubby pipes - no bends, each pipe is straight and goes down through it's own hole in the cowling and chopped off about 2-3 inches past the cowling? The longest pipe is about 12 inches and the shortest is about 7. That's how the system is on my O-200 (only 5 hours on it with it in this configuration)(150 ish hours on the Revmaster that I pulled after the third time it tried to kill me...). Am I'm gonna have cracks with this setup? Was just thinking I may need a spring-type setup between the pipes inside the cowling to maintain tension on the pipes.  

John Hartley

Most of the money I've made in my life has been spent on airplanes. I wasted the rest.


Ryszard Zadow
 

< Nice and quiet. 😊>

Ewww!

On May 14, 2022, at 21:19, Jim Patillo <Logistics_engineering@...> wrote:

Nice and quiet. 😊


Ryszard Zadow
 

On May 14, 2022, at 21:49, Ryszard Zadow <ryszardzadow@...> wrote:

< Nice and quiet. 😊>

Ewww!

On May 14, 2022, at 21:19, Jim Patillo <Logistics_engineering@...> wrote:

Nice and quiet. 😊





Mike Dwyer
 

I would think the drag penalty from 4 pipes sticking out in the airstream  would be too much to bear!  I'd estimate a 20 mph penalty.

And as far as the 2 on one side.  The fireing order is 1-3-2-4, so if you combine the 1-3 pipes into one you get two power pulses then 2 cycles of nothing.  This is less than optimal.

Mike Dwyer


On Sat, May 14, 2022, 8:36 PM John Hartley via groups.io <John.hartley1=yahoo.com@groups.io> wrote:
How about a 4:4 system with stubby pipes - no bends, each pipe is straight and goes down through it's own hole in the cowling and chopped off about 2-3 inches past the cowling? The longest pipe is about 12 inches and the shortest is about 7. That's how the system is on my O-200 (only 5 hours on it with it in this configuration)(150 ish hours on the Revmaster that I pulled after the third time it tried to kill me...). Am I'm gonna have cracks with this setup? Was just thinking I may need a spring-type setup between the pipes inside the cowling to maintain tension on the pipes.  

John Hartley

Most of the money I've made in my life has been spent on airplanes. I wasted the rest.


Ryszard Zadow
 

< I would think the drag penalty from 4 pipes sticking out in the airstream would be too much to bear! I'd estimate a 20 mph penalty.

Which is why most all F1 racers have them? LoL
Ryz

On May 14, 2022, at 22:29, Mike Dwyer <q200pilot@...> wrote:

I would think the drag penalty from 4 pipes sticking out in the airstream would be too much to bear! I'd estimate a 20 mph penalty.


Troy Zawlacki
 

One pipe and faired install !

On May 14, 2022, at 8:42 PM, Ryszard Zadow <ryszardzadow@...> wrote:

< I would think the drag penalty from 4 pipes sticking out in the airstream would be too much to bear! I'd estimate a 20 mph penalty.

Which is why most all F1 racers have them? LoL
Ryz

On May 14, 2022, at 22:29, Mike Dwyer <q200pilot@...> wrote:

I would think the drag penalty from 4 pipes sticking out in the airstream would be too much to bear! I'd estimate a 20 mph penalty.





Ryszard Zadow
 

That’s on a car, not an F1 airplane!

On May 14, 2022, at 11:14 PM, Troy Zawlacki <troyzc3@...> wrote:

One pipe and faired install !



On May 14, 2022, at 8:42 PM, Ryszard Zadow <ryszardzadow@...> wrote:

< I would think the drag penalty from 4 pipes sticking out in the airstream would be too much to bear! I'd estimate a 20 mph penalty.

Which is why most all F1 racers have them? LoL
Ryz

On May 14, 2022, at 22:29, Mike Dwyer <q200pilot@...> wrote:

I would think the drag penalty from 4 pipes sticking out in the airstream would be too much to bear! I'd estimate a 20 mph penalty.








<exhaust.jpg>


John Hartley
 

Seems like most F1 racers have that setup. I think that there isn't much concern put into making them fly xxxx hours reliably and they have more dead stick landings than the general population. I'm wondering if the straight stubbys would be more likely to develop cracks/have problems?


Mike Dwyer
 

A  F1 racer has so much drag that it needs 1000 hp to go 200 mph!  

Ya gotta think about low drag in a Q if you want to go fast.

Mike Dwyer

On Sat, May 14, 2022, 9:42 PM Ryszard Zadow <ryszardzadow@...> wrote:
< I would think the drag penalty from 4 pipes sticking out in the airstream  would be too much to bear!  I'd estimate a 20 mph penalty.

Which is why most all F1 racers have them? LoL
Ryz

> On May 14, 2022, at 22:29, Mike Dwyer <q200pilot@...> wrote:
>
> I would think the drag penalty from 4 pipes sticking out in the airstream  would be too much to bear!  I'd estimate a 20 mph penalty.







Ryszard Zadow
 

< isn't much concern put into making them fly xxxx hours reliably and they have more dead stick landings than the general population.>

What data do you have to support this? How much F1 racing experience fo you have to back up these opinions? 

As an F1 racer both at Reno and internationally I can attest your statement is not valid. 

Ryszard 

On May 15, 2022, at 05:51, John Hartley via groups.io <John.hartley1@...> wrote:

Seems like most F1 racers have that setup. I think that there isn't much concern put into making them fly xxxx hours reliably and they have more dead stick landings than the general population. I'm wondering if the straight stubbys would be more likely to develop cracks/have problems? IMG_0227_JPG.jpg1112613.jpg2155239.jpg


Ryszard Zadow
 

< A F1 racer has so much drag that it needs 1000 hp to go 200 mph! >

i’m absolutely amazed at some of the statements being posted on here.

RZ

On May 15, 2022, at 07:40, Mike Dwyer <q200pilot@...> wrote:

A F1 racer has so much drag that it needs 1000 hp to go 200 mph!


Corbin
 

I’m no expert but the first three F1 racers I looked at all had 90-100hp and two were the O-200 Cont.

On May 15, 2022, at 7:55 AM, Ryszard Zadow <ryszardzadow@...> wrote:

< A  F1 racer has so much drag that it needs 1000 hp to go 200 mph!  >

i’m absolutely amazed at some of the statements being posted on here.

RZ

On May 15, 2022, at 07:40, Mike Dwyer <q200pilot@...> wrote:

A  F1 racer has so much drag that it needs 1000 hp to go 200 mph!  







--

Corbin 
N121CG