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PBY-5A exhaust modification?


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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?



enter image description hereenter image description hereenter image description here










share|improve this question











$endgroup$










  • 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


















4












$begingroup$


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



enter image description hereenter image description hereenter image description here










share|improve this question











$endgroup$










  • 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














4












4








4





$begingroup$


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



enter image description hereenter image description hereenter image description here










share|improve this question











$endgroup$




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



enter image description hereenter image description hereenter image description here







engine-design pby-catalina






share|improve this question















share|improve this question













share|improve this question




share|improve this question








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














  • 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










1 Answer
1






active

oldest

votes


















3














$begingroup$

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.



enter image description here






share|improve this answer









$endgroup$











  • 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













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1 Answer
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1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









3














$begingroup$

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.



enter image description here






share|improve this answer









$endgroup$











  • 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
















3














$begingroup$

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.



enter image description here






share|improve this answer









$endgroup$











  • 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














3














3










3







$begingroup$

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.



enter image description here






share|improve this answer









$endgroup$



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.



enter image description here







share|improve this answer












share|improve this answer



share|improve this answer










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














  • 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



















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