PBY-5A exhaust modification?What is some of this extra “stuff” on jet engines?How do turbofan nacelle...
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PBY-5A exhaust modification?
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What is the function of these “tubes” that cover the outboard exhaust stacks on some PBY-5A and PBY-6A aircraft?



engine-design pby-catalina
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add a comment
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$begingroup$
What is the function of these “tubes” that cover the outboard exhaust stacks on some PBY-5A and PBY-6A aircraft?



engine-design pby-catalina
$endgroup$
1
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German Wiki says the exhaust gases were used to de-ice the wings. Could it have something to do with that?
$endgroup$
– PerlDuck
8 hours ago
$begingroup$
I'm going with a cabin heating system for northern operations.
$endgroup$
– John K
7 hours ago
add a comment
|
$begingroup$
What is the function of these “tubes” that cover the outboard exhaust stacks on some PBY-5A and PBY-6A aircraft?



engine-design pby-catalina
$endgroup$
What is the function of these “tubes” that cover the outboard exhaust stacks on some PBY-5A and PBY-6A aircraft?



engine-design pby-catalina
engine-design pby-catalina
edited 2 hours ago
Sean
9,1425 gold badges47 silver badges119 bronze badges
9,1425 gold badges47 silver badges119 bronze badges
asked 9 hours ago
Mike SowsunMike Sowsun
22.7k2 gold badges76 silver badges95 bronze badges
22.7k2 gold badges76 silver badges95 bronze badges
1
$begingroup$
German Wiki says the exhaust gases were used to de-ice the wings. Could it have something to do with that?
$endgroup$
– PerlDuck
8 hours ago
$begingroup$
I'm going with a cabin heating system for northern operations.
$endgroup$
– John K
7 hours ago
add a comment
|
1
$begingroup$
German Wiki says the exhaust gases were used to de-ice the wings. Could it have something to do with that?
$endgroup$
– PerlDuck
8 hours ago
$begingroup$
I'm going with a cabin heating system for northern operations.
$endgroup$
– John K
7 hours ago
1
1
$begingroup$
German Wiki says the exhaust gases were used to de-ice the wings. Could it have something to do with that?
$endgroup$
– PerlDuck
8 hours ago
$begingroup$
German Wiki says the exhaust gases were used to de-ice the wings. Could it have something to do with that?
$endgroup$
– PerlDuck
8 hours ago
$begingroup$
I'm going with a cabin heating system for northern operations.
$endgroup$
– John K
7 hours ago
$begingroup$
I'm going with a cabin heating system for northern operations.
$endgroup$
– John K
7 hours ago
add a comment
|
1 Answer
1
active
oldest
votes
$begingroup$
Thanks for the suggestions in the comments.
Using the term “heat exchanger” I was able to find an Aircraft Modelling forum that gave the answer I was looking for.
Interpreting wartime photography: Catalina in Ceylon
It is indeed a heat exchanger system for leading edge anti-icing. The tail appears to have a separate anti-ice system that burns fuel for heat. This thermal anti-icing was introduced on late model PBY-5A. It probably was an optional system.

$endgroup$
1
$begingroup$
On some jets with heated LE, usually hard LE non-slatted ones, the LEs are heated above the boiling point, 220F or so, by high temp bleed. They are "evaporative" systems that are like spitting on a steam iron, and the idea is to prevent runback ice forming behind the leading edges. If you have slats, you can tolerate runback ice and the system can run much cooler, around 140-160F.
$endgroup$
– John K
5 hours ago
add a comment
|
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1 Answer
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1 Answer
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$begingroup$
Thanks for the suggestions in the comments.
Using the term “heat exchanger” I was able to find an Aircraft Modelling forum that gave the answer I was looking for.
Interpreting wartime photography: Catalina in Ceylon
It is indeed a heat exchanger system for leading edge anti-icing. The tail appears to have a separate anti-ice system that burns fuel for heat. This thermal anti-icing was introduced on late model PBY-5A. It probably was an optional system.

$endgroup$
1
$begingroup$
On some jets with heated LE, usually hard LE non-slatted ones, the LEs are heated above the boiling point, 220F or so, by high temp bleed. They are "evaporative" systems that are like spitting on a steam iron, and the idea is to prevent runback ice forming behind the leading edges. If you have slats, you can tolerate runback ice and the system can run much cooler, around 140-160F.
$endgroup$
– John K
5 hours ago
add a comment
|
$begingroup$
Thanks for the suggestions in the comments.
Using the term “heat exchanger” I was able to find an Aircraft Modelling forum that gave the answer I was looking for.
Interpreting wartime photography: Catalina in Ceylon
It is indeed a heat exchanger system for leading edge anti-icing. The tail appears to have a separate anti-ice system that burns fuel for heat. This thermal anti-icing was introduced on late model PBY-5A. It probably was an optional system.

$endgroup$
1
$begingroup$
On some jets with heated LE, usually hard LE non-slatted ones, the LEs are heated above the boiling point, 220F or so, by high temp bleed. They are "evaporative" systems that are like spitting on a steam iron, and the idea is to prevent runback ice forming behind the leading edges. If you have slats, you can tolerate runback ice and the system can run much cooler, around 140-160F.
$endgroup$
– John K
5 hours ago
add a comment
|
$begingroup$
Thanks for the suggestions in the comments.
Using the term “heat exchanger” I was able to find an Aircraft Modelling forum that gave the answer I was looking for.
Interpreting wartime photography: Catalina in Ceylon
It is indeed a heat exchanger system for leading edge anti-icing. The tail appears to have a separate anti-ice system that burns fuel for heat. This thermal anti-icing was introduced on late model PBY-5A. It probably was an optional system.

$endgroup$
Thanks for the suggestions in the comments.
Using the term “heat exchanger” I was able to find an Aircraft Modelling forum that gave the answer I was looking for.
Interpreting wartime photography: Catalina in Ceylon
It is indeed a heat exchanger system for leading edge anti-icing. The tail appears to have a separate anti-ice system that burns fuel for heat. This thermal anti-icing was introduced on late model PBY-5A. It probably was an optional system.

answered 6 hours ago
Mike SowsunMike Sowsun
22.7k2 gold badges76 silver badges95 bronze badges
22.7k2 gold badges76 silver badges95 bronze badges
1
$begingroup$
On some jets with heated LE, usually hard LE non-slatted ones, the LEs are heated above the boiling point, 220F or so, by high temp bleed. They are "evaporative" systems that are like spitting on a steam iron, and the idea is to prevent runback ice forming behind the leading edges. If you have slats, you can tolerate runback ice and the system can run much cooler, around 140-160F.
$endgroup$
– John K
5 hours ago
add a comment
|
1
$begingroup$
On some jets with heated LE, usually hard LE non-slatted ones, the LEs are heated above the boiling point, 220F or so, by high temp bleed. They are "evaporative" systems that are like spitting on a steam iron, and the idea is to prevent runback ice forming behind the leading edges. If you have slats, you can tolerate runback ice and the system can run much cooler, around 140-160F.
$endgroup$
– John K
5 hours ago
1
1
$begingroup$
On some jets with heated LE, usually hard LE non-slatted ones, the LEs are heated above the boiling point, 220F or so, by high temp bleed. They are "evaporative" systems that are like spitting on a steam iron, and the idea is to prevent runback ice forming behind the leading edges. If you have slats, you can tolerate runback ice and the system can run much cooler, around 140-160F.
$endgroup$
– John K
5 hours ago
$begingroup$
On some jets with heated LE, usually hard LE non-slatted ones, the LEs are heated above the boiling point, 220F or so, by high temp bleed. They are "evaporative" systems that are like spitting on a steam iron, and the idea is to prevent runback ice forming behind the leading edges. If you have slats, you can tolerate runback ice and the system can run much cooler, around 140-160F.
$endgroup$
– John K
5 hours ago
add a comment
|
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1
$begingroup$
German Wiki says the exhaust gases were used to de-ice the wings. Could it have something to do with that?
$endgroup$
– PerlDuck
8 hours ago
$begingroup$
I'm going with a cabin heating system for northern operations.
$endgroup$
– John K
7 hours ago