Caproni Ca.91 flying boat project

More about the Caproni Ca 91:
 

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Hi Caproni Ca.90.

http://avia-museum.narod.ru/italy/caproni_ca-90.html

http://www.airwar.ru/enc/bww1/ca90.html
 

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lucamax said:
Hi,
Here it is a better quality pic taken from the book "Gli Aeroplani Caproni", wich you can download for free here
Click to expand...
breathtaking! Thanks a lot. :D
http://www.secretprojects.co.uk/forum/index.php?action=dlattach;topic=16738.0;attach=167609;image
http://www.secretprojects.co.uk/forum/index.php?action=dlattach;topic=16738.0;attach=167621;image
Super model
https://upload.wikimedia.org/wikipedia/commons/8/84/Caproni_Ca.90_scale_model_in_Volandia.JPG
Radiator arrangement for three rear engine cooling is impressive.
Wikipedia
https://en.wikipedia.org/wiki/Caproni_Ca.90
"The Caproni Ca.90 was a prototype Italian heavy bomber designed and built by Caproni. When it first flew in 1929 it was the largest aircraft in the world."
 

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The drawing.
 

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hesham said:
The drawing.
Click to expand...
Thanks for super drawing. It's very hard to find Ca.91 flying boat information in internet. ;)
 
WhyMe said:
What would be a possible reason behind the idea of using both the stabilising sponsons and the underwing floats?
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Hi WhyMe,

maybe to give more balance for the airplane ?.
 
I don't know. Perhaps it is a large airplane with a low wing? The sponsons provide most of the stability - but the wing floats help prevent the wing tips from striking smaller waves?
 
Thanks, hesham and Avimimus.
I understand that both things provide stability on water but it's usually one or the other... I've never seen them both used at the same time, hence the question ;)
 
WhyMe said:
Thanks, hesham and Avimimus.
I understand that both things provide stability on water but it's usually one or the other... I've never seen them both used at the same time, hence the question ;)
Click to expand...

It is a very good question and we're just guessing.

I suppose structural strength might also be an issue for such a large design? Perhaps the sponsons are meant to reduce the bending forces on the wings from the wing floats?

The moment arm/leverage for the wing floats would be much greater - so they'd also have a faster effect in stopping rolling (if my understanding is correct).
 

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