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Jan 22, 2015, 11:10 AM
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Odisseo's Avatar
And this is the engine I would to use



Saito 4T F100 Twin
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Jan 22, 2015, 04:55 PM
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He guys,

to compare right, or the right plane(s), it is important to know where the line drawing comes from!
The black lined V-bottom-shaped plane is no specific Savoia hull!
It comes from the NACA report nr. 770, where different hull types are compared with each other:
http://naca.central.cranfield.ac.uk/...aca-tm-770.pdf
figure 7-8
No Savoia flying boat of the time had such a rounded hull deck, nor had it a V-bottom. Call it an urban legend...

Regards,
Kuni
Jan 22, 2015, 06:20 PM
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mistairjoe's Avatar

hull ???


Thanks for the info Kuni. I am not sure what you are referring to about the "rounded hull deck"i am pretty much following Kavelars drawing where he clearly shows a concave hull at the step. at this point I am trying to build something that hopefully floats and flies well since there is very little good documentation on the S 51. Speaking of scale, in none of the photos did I detect any airfoil in the tail feathers. They look flat probably made from aluminum tubing. I have no objections what so ever from deviating from what was supposedly scale(as I noticed you have done with the air foiled S21 Kuni) to suit a better flying model and I will probably design two versions of the S51. One with airfoiled stab and rudder and one flat.
Cheers Joe
Jan 23, 2015, 01:03 AM
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Hi Joe,


I was referring to this black and red line drawing:
http://i1379.photobucket.com/albums/...s80816543.jpeg
where it seems Alberto draws much attention to (bow shape, V-bottom vs. flat/hollow shaped bottom). The left formers drawing is the one belonging to the side line drawing.

Regards,
Kuni
Jan 23, 2015, 09:24 AM
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mistairjoe's Avatar
Thanks It is clear now what you you were saying. To bad we don't have more info to work with.
Nice engine Odisseo I am going electric. can' wait to see how you'll extract formers out of your Rhino drawings.
Jan 23, 2015, 09:33 AM
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Odisseo's Avatar
Hello Joe, hello Kuni,

in fact I wrote already I was going to change the fuselage section with the "U" hull
What make me wonder is that the drawing Joe is using (side view) show a nose and a hull line which can't be seen in any picture or original drawing and this design is a lot different of the only "out of water" picture we have of the S51.
My wonder is, am I going to follow those drawings which are probably done with a lot of fantasy or am I going to follow the Sant'Anna dry S51 picture?

Greetz!
Jan 23, 2015, 09:35 AM
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Odisseo's Avatar
Quote:
Originally Posted by mistairjoe
Thanks It is clear now what you you were saying. To bad we don't have more info to work with.
Nice engine Odisseo I am going electric. can' wait to see how you'll extract formers out of your Rhino drawings.
As soon i decide which side view drawing or picture to follow and ill start to extract formers from the 3D model and ill start with the project
Jan 23, 2015, 09:59 AM
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mistairjoe's Avatar
Odisseo, when I look at the Naples photo I see more of the drawing i am using then the one that is out of the water. The nose in the Naples photo is not as pointed has a vertical line to it and the hull seems to be deeper.
Jan 23, 2015, 11:00 AM
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MAybe it is (at last) a photographic distortion due to wide-angle-objective of the camera used then? Is dosn't matter anyway, there are not enough pictures of this bird to declare this or that is right.

Regards,
Kuni
Jan 19, 2019, 07:00 PM
mcg
mcg
Registered User
Re Schneider Cup at Naples, 1922

Here is a link to a blog I originally posted in 2014.

https://www.rcgroups.com/forums/member.php?u=68951

In the recent transition from http to https, all the photos and illustrations were lost. Luckily I had backup copies, so I was able to restore the missing images, along with a few new ones.

The account of the race is based on translations into English from two Italian sources.

Michael


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