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Need basic parameters - 8/31/2008 8:56:20 PM   
DwightMann


 

Posts: 65
Joined: 9/14/2004
From: Mohave Valley, AZ, USA
Status: offline 		I am thinking about scratch building a twin engine electric more like a seamaster not like a cub (what do you call each?) What are the parameters for hull width, length, angles etc.
       Post #: 1

RE: Need basic parameters - 9/1/2008 2:31:01 PM   
JimCasey



Posts: 1572
Joined: 3/4/2002
From: Cookeville, TN, USA
Status: online 		Most of what you need is here:
http://www.smilesandwags.com/Floatsite/westwood.html

_____________________________

Jim Casey/Seaplane Nerd
http://www.smilesandwags.com/Floats.html

(in reply to DwightMann)
       Post #: 2

RE: Need basic parameters - 9/2/2008 12:33:53 AM   
DwightMann


 

Posts: 65
Joined: 9/14/2004
From: Mohave Valley, AZ, USA
Status: offline 		Although the article is difficult to read, the information will be useful. I have on question though. What is "dead rise"?

(in reply to JimCasey)
       Post #: 3

RE: Need basic parameters - 9/2/2008 4:07:14 PM   
Antique



Posts: 675
Joined: 7/14/2002
From: Anywhere, CA, USA
Status: offline 		Follow these to the letter, never fails.

Attachments
Click to see the file in new window.Attachment.txt

(in reply to DwightMann)
       Post #: 4

RE: Need basic parameters - 9/3/2008 2:38:42 AM   
JimCasey



Posts: 1572
Joined: 3/4/2002
From: Cookeville, TN, USA
Status: online 		Antique's attachment is a reference to Chuck Cunningham's landmark article which is the rosetta stone for float-flying. It is applicable to floats, but the article I sent has information pertinent to flying boats. ...Only one float-the fuselage.

Dead Rise , as I understand,is the angle the hull adopts when not making any lift. V-bottom hulls have deadrise, flat-bottom hulls don't, but they skip when they land.

_____________________________

Jim Casey/Seaplane Nerd
http://www.smilesandwags.com/Floats.html

(in reply to Antique)
       Post #: 5

RE: Need basic parameters - 9/3/2008 4:51:05 AM   
DwightMann


 

Posts: 65
Joined: 9/14/2004
From: Mohave Valley, AZ, USA
Status: offline 		Jim,
I used the formula for a single float, the type that looks like a torpedo hanging under the fuse. The beam would be rather narrow, but the equation IS for a float not a hull. Could I widen it to what a normal fuse width would be?
The single float also has a larger portion of the float ahead of the step/CG than does the twin float arrangement. What would the ratio be for a hull design?

(in reply to JimCasey)
       Post #: 6

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