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Old Apr 01, 2014, 11:45 AM
ParkScaleModels
zbrubaker's Avatar
United States, PA, Loganville
Joined Feb 2002
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1:20 scale Pan Am Boeing 314 "American Clipper"

I've been working on this design for quite a long time off and on and it's finally close to a point to when I can actually start cutting and assembling parts. It is my hope to have the prototype done and ready to fly down at Joe Nall in 5 weeks!

Specs:
Length: 63.3"
Span: 91.2"
height: 16.5"
Est. AUW: 8lbs (or less)
Power: 4x Turnigy Park450 1050kV, 30A ESC, 2S3P 3000mAh LiPo

I will be taking a lot of photos of the build so I can use them for a build manual. Stay tuned!
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Old Apr 01, 2014, 04:05 PM
Pigeon 4 life.
addictedtoplanes's Avatar
Canada, ON, Guelph
Joined Jun 2012
588 Posts
Oh boy!!
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Old Apr 01, 2014, 07:33 PM
Tow Dog.
Pilatuspc12's Avatar
United States, CO, Hotchkiss
Joined Oct 2006
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Look good! This will be a popular airplane! Can't wait!

Randy
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Old Apr 02, 2014, 07:24 AM
Parkcityflier
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Park City, UT, USA
Joined Aug 2001
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In 5 weeks? Wow !!
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Old Apr 03, 2014, 05:05 AM
71% of the world is runway . .
Bart83's Avatar
Nederland, ZH, Oostvoorne
Joined Jun 2009
1,381 Posts
Nice Zeke, very interesting to see what you have come up with.

Could you post a picture of the side view ? I would like to see what the bottom shape of the sponsoon is and what angle's you have chosen in relation with the planning surface ( keel forward of step )

Have fun ! will follow your build progress.



Bart
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Old Apr 03, 2014, 07:59 AM
ParkScaleModels
zbrubaker's Avatar
United States, PA, Loganville
Joined Feb 2002
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Here you go Bart... The hydro-stabilizers are set at a 4.5 degree incidence. With where I have calculated the waterline to be, I don't foresee any issues with the stabilizers remaining 'stuck' to the water.
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Last edited by zbrubaker; Apr 03, 2014 at 11:09 AM.
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Old Apr 03, 2014, 01:55 PM
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Hi like it so much.
Marecisko
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Old Apr 03, 2014, 02:47 PM
71% of the world is runway . .
Bart83's Avatar
Nederland, ZH, Oostvoorne
Joined Jun 2009
1,381 Posts
Zeke ,

Thanks for posting that side view. I dont forsee anny trouble with getting of the water either for this bird.
There are some guys who had trouble with the sponsoons sticking on the water on there Do Wal flying boats. Dornier stummels ( sponsoons ) are much larger in relation the the airplane's size then on the Boeing.

I see the incidence angle you placed the sponsoons at but take a look at the bottom surface. I made some lines on pictures to show what i mean.
The real 314 had somekind of waterflaps ? do you know what there purpose was ?

The 3d cad model you make looks stunning , cant wait to see some building

Cheers,

Bart
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Old Apr 03, 2014, 05:56 PM
ParkScaleModels
zbrubaker's Avatar
United States, PA, Loganville
Joined Feb 2002
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Quote:
Originally Posted by Bart83 View Post
The real 314 had somekind of waterflaps ? do you know what there purpose was ?
I believe the 314 had a small 'step' built into the underside of the sponson. The purpose would have been just like the step in the hull...to make an air gap to separate the water from the surface of the hull/sponson to reduce drag.

For simplicity's sake I chose to use a symmetrical airfoil shape for the sponson instead of a scale cross section. I understand what you are referring to and your concern with the angle of the sponson. I believe that it won't be a problem. However, I have designed the the sponsons to be removable, so if I need to I can make new ones at a greater AOA or I could even add a step if there appears to be a problem with the design.

-Zeke
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Old Apr 04, 2014, 12:51 AM
71% of the world is runway . .
Bart83's Avatar
Nederland, ZH, Oostvoorne
Joined Jun 2009
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Removable sponsoon thats a very good idea.
The wing , is it in 2 piece's like on your Albatross ?

Cheers,

Bart
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Old Apr 04, 2014, 06:22 AM
ParkScaleModels
zbrubaker's Avatar
United States, PA, Loganville
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Quote:
Originally Posted by Bart83 View Post
The wing , is it in 2 piece's like on your Albatross ?
Yes.
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Old Yesterday, 01:16 AM
Editor - Flying Models
United States, CT
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Since no one else has asked, can I be first in line to fly it at Joe Nall? Can I? Can I?
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Old Yesterday, 05:17 AM
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Oxford, Michigan, United States
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Looks great Zeke.
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Old Yesterday, 05:25 AM
ParkScaleModels
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United States, PA, Loganville
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Quote:
Originally Posted by Thayer View Post
Since no one else has asked, can I be first in line to fly it at Joe Nall? Can I? Can I?
But of course!
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Old Yesterday, 05:26 AM
ParkScaleModels
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Quote:
Originally Posted by Petefoss View Post
Looks great Zeke.
Thanks Pete!
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