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Tests in the variable-density wind tunnel of the NACA 23012 airfoil with plain and split flaps (open access)

Tests in the variable-density wind tunnel of the NACA 23012 airfoil with plain and split flaps

From Summary: "Section characteristics for use in wing design are presented for the NACA 23012 airfoil with plain and split flaps of 20 percent wing chord at a value of the effective Reynolds number of about 8,000,000. The flap deflections covered a range from 60 degrees upward to 75 degrees downward for the plain flap and from neutral to 90 degrees downward for the split flap. The split flap was aerodynamically superior to the plain flap in producing high maximum lift coefficients and in having lower profile-drag coefficients at high lift coefficients."
Date: January 21, 1938
Creator: Abbott, Ira H. & Greenberg, Harry
Object Type: Report
System: The UNT Digital Library
The Van Zandter (Canton, Tex.), Vol. 36, No. 7, Ed. 1 Friday, January 21, 1938 (open access)

The Van Zandter (Canton, Tex.), Vol. 36, No. 7, Ed. 1 Friday, January 21, 1938

Weekly newspaper from Canton, Texas that includes local, state, and national news along with advertising.
Date: January 21, 1938
Creator: Adams, S. W.
Object Type: Newspaper
System: The Portal to Texas History
Payne County News (Stillwater, Okla.), Vol. 46, No. 21, Ed. 1 Friday, January 21, 1938 (open access)

Payne County News (Stillwater, Okla.), Vol. 46, No. 21, Ed. 1 Friday, January 21, 1938

Weekly newspaper from Stillwater, Oklahoma that includes local, state, and national news along with advertising.
Date: January 21, 1938
Creator: Allen, Willis F.
Object Type: Newspaper
System: The Gateway to Oklahoma History
Payne County News (Stillwater, Okla.), Vol. 47, No. 8, Ed. 1 Friday, October 21, 1938 (open access)

Payne County News (Stillwater, Okla.), Vol. 47, No. 8, Ed. 1 Friday, October 21, 1938

Weekly newspaper from Stillwater, Oklahoma that includes local, state, and national news along with advertising.
Date: October 21, 1938
Creator: Allen, Willis F.
Object Type: Newspaper
System: The Gateway to Oklahoma History
The American Guardian (Oklahoma City, Okla.), Vol. 21, No. 16, Ed. 1 Friday, January 21, 1938 (open access)

The American Guardian (Oklahoma City, Okla.), Vol. 21, No. 16, Ed. 1 Friday, January 21, 1938

Weekly newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.
Date: January 21, 1938
Creator: Ameringer, Oscar
Object Type: Newspaper
System: The Gateway to Oklahoma History
The American Guardian (Oklahoma City, Okla.), Vol. 22, No. 3, Ed. 1 Friday, October 21, 1938 (open access)

The American Guardian (Oklahoma City, Okla.), Vol. 22, No. 3, Ed. 1 Friday, October 21, 1938

Weekly newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.
Date: October 21, 1938
Creator: Ameringer, Oscar
Object Type: Newspaper
System: The Gateway to Oklahoma History
San Antonio Register (San Antonio, Tex.), Vol. 7, No. 42, Ed. 1 Friday, January 21, 1938 (open access)

San Antonio Register (San Antonio, Tex.), Vol. 7, No. 42, Ed. 1 Friday, January 21, 1938

Weekly newspaper from San Antonio, Texas that includes local, state, and national news along with advertising.
Date: January 21, 1938
Creator: Andrews, U. J.
Object Type: Newspaper
System: The Portal to Texas History
Coleman County Chronicle (Coleman, Tex.), Vol. 6, No. 16, Ed. 1 Thursday, April 21, 1938 (open access)

Coleman County Chronicle (Coleman, Tex.), Vol. 6, No. 16, Ed. 1 Thursday, April 21, 1938

Weekly newspaper from Coleman, Texas that includes local, state, and national news along with advertising.
Date: April 21, 1938
Creator: Autry, R. A.
Object Type: Newspaper
System: The Portal to Texas History
Coleman County Chronicle (Coleman, Tex.), Vol. 6, No. 29, Ed. 1 Thursday, July 21, 1938 (open access)

Coleman County Chronicle (Coleman, Tex.), Vol. 6, No. 29, Ed. 1 Thursday, July 21, 1938

Weekly newspaper from Coleman, Texas that includes local, state, and national news along with advertising.
Date: July 21, 1938
Creator: Autry, R. A.
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. 33, No. 92, Ed. 1 Friday, January 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. 33, No. 92, Ed. 1 Friday, January 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: January 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. 33, No. 118, Ed. 1 Monday, February 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. 33, No. 118, Ed. 1 Monday, February 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: February 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. 33, No. 142, Ed. 1 Monday, March 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. 33, No. 142, Ed. 1 Monday, March 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: March 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. 33, No. 169, Ed. 1 Thursday, April 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. 33, No. 169, Ed. 1 Thursday, April 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: April 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. [33], No. 221, Ed. 1 Tuesday, June 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. [33], No. 221, Ed. 1 Tuesday, June 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: June 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. [33], No. 246, Ed. 1 Thursday, July 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. [33], No. 246, Ed. 1 Thursday, July 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: July 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. [33], No. 272, Ed. 1 Sunday, August 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. [33], No. 272, Ed. 1 Sunday, August 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: August 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. [33], No. 298, Ed. 1 Wednesday, September 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. [33], No. 298, Ed. 1 Wednesday, September 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: September 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. [34], No. 14, Ed. 1 Friday, October 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. [34], No. 14, Ed. 1 Friday, October 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: October 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. [34], No. 40, Ed. 1 Monday, November 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. [34], No. 40, Ed. 1 Monday, November 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: November 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
Cleburne Times-Review (Cleburne, Tex.), Vol. [34], No. 66, Ed. 1 Wednesday, December 21, 1938 (open access)

Cleburne Times-Review (Cleburne, Tex.), Vol. [34], No. 66, Ed. 1 Wednesday, December 21, 1938

Daily newspaper from Cleburne, Texas that includes local, state, and national news along with advertising.
Date: December 21, 1938
Creator: Bacus, Roy
Object Type: Newspaper
System: The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 43, No. 48, Ed. 1 Friday, January 21, 1938 (open access)

The Clifton Record (Clifton, Tex.), Vol. 43, No. 48, Ed. 1 Friday, January 21, 1938

Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date: January 21, 1938
Creator: Baldridge, Robert L.
Object Type: Newspaper
System: The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 44, No. 35, Ed. 1 Friday, October 21, 1938 (open access)

The Clifton Record (Clifton, Tex.), Vol. 44, No. 35, Ed. 1 Friday, October 21, 1938

Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date: October 21, 1938
Creator: Baldridge, Robert L.
Object Type: Newspaper
System: The Portal to Texas History
The Edmond Enterprise (Edmond, Okla.), Vol. 37, No. 21, Ed. 1 Tuesday, June 21, 1938 (open access)

The Edmond Enterprise (Edmond, Okla.), Vol. 37, No. 21, Ed. 1 Tuesday, June 21, 1938

Weekly newspaper from Edmond, Oklahoma that includes local, state, and national news along with advertising.
Date: June 21, 1938
Creator: Banzett, D. W.
Object Type: Newspaper
System: The Gateway to Oklahoma History

Sapulpa, OK

Photograph of an aerial view of Sapulpa, OK.
Date: October 21, 1938
Creator: Barnes Aerial Surveys
Object Type: Photograph
System: The Gateway to Oklahoma History