Drawing A327-1826-m46_prelim_20240429.pdf

PDF 799 KB Posted Aug 3, 2026

Attached to: Sources Sought Notice for a Model Support Replacement of the Unitary Plan Wind Tunnel
Solicitation number: 80ARC026SS0728
Issued by: National Aeronautics and Space Administration Ames Research Center

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Written by GovTribe AI · Aug 3, 2026

This document is a preliminary engineering drawing for a knuckle component used in the Sting Model Support for the Unitary Plan Wind Tunnel at NASA Ames Research Center, Moffett Field, California. The drawing is dated April 23, 2024, and is marked "NOT FOR FABRICATION," indicating it is in preliminary status and not yet approved for production use.

The knuckle part (Drawing Number 327-1826-M46, Revision A.10) is manufactured from ASTM A668 Class M material and has an estimated weight of 385 pounds. The component requires specific machining, heat treatment to achieve an ultimate tensile strength of 170 KSI minimum and Rc 39 minimum hardness, and precision fitting with four bearing races (A327-1826-M47-19, -20, -21, -22) and one bushing (A327-1826-M48-4). The drawing specifies detailed dimensional tolerances per ASME Y14.5-2009, includes multiple isometric and sectional views with precise measurements in inches, and indicates specific machining operations such as break sharp corners to 0.01 inches maximum, skim cutting to 0.005 inches maximum, and establishment of datum reference planes. The document contains comprehensive parts list information, tolerance specifications for fractional and decimal dimensions, and drilling hole tolerances for various diameter ranges.

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Other files

File	Type	Posted
Drawing A327-1826-m54_prelim_20240429.pdf	PDF	Aug 3, 2026
ATTACHMENT 1 - Draft Statement of Work.pdf	PDF	Aug 3, 2026
Drawing A327-1826-m31_prelim_20240429.pdf	PDF	Aug 3, 2026
Drawing A327-1826-m35_prelim_20240429.pdf	PDF	Aug 3, 2026

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N A S A B O R D E R

8 7 6 5 4 3 2

1345678

NOTES: UNLESS OTHERWISE SPECIFIED

REV DESCRIPTION DATE APPROVAL

REVISIONS

Ames Research Center Moffett Field, California 94035-1000

SHEETSCALE INDEX DATE OF

DRAWINGDO NOT SCALE

02-2019J. KENNON

PARTS LIST

ITEM

NO.ZONE

MATERIAL SPECIFICATIONDESCRIPTION/NOMENCLATURE

PART OR

IDENTIFYING NO.

CAGE

CODEQTY REQ'D PER ASSY

SHEETBN

1ASTM A668 CLASS MKNUCKLE-11

APPLICATION

NEXT ASSEMBLYNO.

A327-1826-M45-1

DETAIL, KNUCKLE

STING MODEL SUPPORT

UNITARY PLAN WIND TUNNEL

1 3 1/2

327-1826-M4625307D

REVCAGE CODESIZE

DATEQ.A.

DATEMATERIAL

DATESTRESS

DATEDESIGNED

DATECHECKED

02-2019J. KENNON

DATEDRAWN

DATEREQUESTOR

DATESUPERVISOR

DATEPROJECT MGR

DATELATEST REVISION

DATEINITIAL RELEASE

DATEPRELIM. RELEASE

A.10327-1826-M46

WC REV:PRO/E DRAWING FILE NAME:

32ALL MACHINED

SURFACES TO BE

MAX.01BREAK SHARP CORNERS.XXXDIAMETER ON SAME

AXIS TOTAL RUN OUT

TOLERANCE

+.005-.001 +.010-.002 +.015-.002 +.030-.003 +.060-.005

DIAMETER

.000- .125 .126- .500 .501-1.000 1.001-2.000

OVER 2.000

1/32 0.1 0.03 0.001 0.5

FRACTIONAL �#�

.X �#�

.XX �#�

.XXX �#�

ANGULAR �#�

DRILLED HOLE TOLERANCESTOLERANCE UNLESS OTHERWISE SPECIFIED

UNLESS OTHERWISE SPECIFIED ALL DIMENSIONS ARE IN INCHES.

ALL DIMENSIONS AND TOLERANCES APPLY AFTER SURFACE TREATMENT.

-1A 327-1826-M46

REVSHEETDRAWING NUMBER

M O D E L

N A M E

M O D E L

T Y P

S S E M

M O D E L

R E V

D B

P r o j e c t s U n i t a r y

K n u c k l e S l e e v e D e s i g n s D r a w i n g s

1 SKIM CUT .005 MAXIMUM AND/OR REMOVE PAINT TO ESTABLISH DATUM B.

2 FOR PRESS/SHRINK FIT WITH A327B-1826-M47-19, BEARING RACE

3 FOR PRESS/SHRINK FIT WITH A327B-1826-M47-20, BEARING RACE

4 FOR PRESS/SHRINK FIT WITH A327B-1826-M47-21, BEARING RACE

5 FOR PRESS/SHRINK FIT WITH A327B-1826-M47-22, BEARING RACE

6 FOR PRESS FIT WITH A327B-1826-M48-4, BUSHING

DIMENSIONS AND TOLERANCES PER ASME Y14.5-2009.

"BN" IN PARTS LIST INDICATES TOTAL QUANTITY REQUIRED AT NEXT

ASSEMBLY/ASSEMBLIES.

SKIM CUT .005 MAXIMUM AND/OR REMOVE PAINT TO ESTABLISH DATUM B.

FOR PRESS/SHRINK FIT WITH A327-1826-M47-19, BEARING RACE.

FOR PRESS/SHRINK FIT WITH A327-1826-M47-20, BEARING RACE.

FOR PRESS/SHRINK FIT WITH A327-1826-M47-21, BEARING RACE.

FOR PRESS/SHRINK FIT WITH A327-1826-M47-22, BEARING RACE.

FOR PRESS FIT WITH A327-1826-M48-4, BUSHING.

AFTER ROUGH MACHINING, HEAT TREAT TO OBTAIN:

- ULTIMATE TENSILE STRENGTH OF 170 KSI MIN

- Rc 39 MIN HARDNESS

FORWARD ISOMETRIC VIEW

REFERENCE ONLY

NO SCALE

AFT ISOMETRIC VIEW

REFERENCE ONLY

NO SCALE

GRAIN DIRECTION

PRELIMINARY DRAWING

DATE: 2024-04-23

NOT FOR FABRICATION

ESTIMATED

WEIGHT: 385 LBS.

P R E L I M

R E L

I N I T I A L

R E

A T E S T

R E

F A B

E S T I M A T

S A B O R D E R

SHEET

8 7 6 5 4 3 2

1345678

SCALE INDEX DATE OF

SIZE CAGE CODE

-A-

-B-

-327-1826-M4625307D

REV

SEE SHEET ONE FOR REVISIONS

-2A 327-1826-M46

REVSHEETDRAWING NUMBER

2 3 1/2 ptc_wm_version327-1826-M46

WC REV:PRO/E DRAWING FILE NAME:

M O D E L

N A M

D E L

T Y P

S E M

M O D E L

R E

P R E L I M

R E

I N I T I A L

R E

A T E S T

R E

A B

E S T I M A T

D p t c w m l o c a t i o n

SEE DETAIL C

SEE DETAIL D

SEE DETAIL E

GRAIN

DIRECTI

2X .38 X 45�$�

2X -20UNF-2B

.63 MIN FULL THREAD

+.001 -.000

.750

PRELIMINARY DRAWING

DATE: 2024-04-23

NOT FOR FABRICATION

1 KNUCKLE - 1 REQ'D

SEE DETAIL C

SEE DETAIL D

SEE DETAIL E

7.5300 +.0005 -.0000

7.6800 +.0005 -.0000

5.7500 +.0005 -.0000

6.4267 +.0005 -.0000

FOR PRESS FIT OF BUSHING

2 HOLES IN LINE

1.7492 1.7480

2X �n�1.858 +.005 -.005

2X 1.281

2X .068

(�n� )6.427 (�n� )6.063 6.500

.28

7.056 7.048

6.254 6.246

50�$�

R3.00

1.312 1.031

1.000 .950

7.665 +.000 -.010

7.719

9.875

4.000 +.002 -.000

TO INTERSECT

.156

TO INTERSECT

.188

7.000

.94

4X R

GROOVE

.125

2X 3.750

2X R.875

THRU.250

7.50�$� +.01�$� -.01�$�

5.250

1.125

2.250

.188

8.280 8.272

T R S E C T N

S A B O R D E R

SHEET

8 7 6 5 4 3 2

1345678

SCALE INDEX DATE OF

SIZE CAGE CODE

A -327-1826-M4625307D

REV

SEE SHEET ONE FOR REVISIONS

-3A 327-1826-M46

REVSHEETDRAWING NUMBER

3 3 1/2

A.10327-1826-M46

WC REV:PRO/E DRAWING FILE NAME:

M O D E L

N A M

D E L

T Y P

S E M

M O D E L

R E

P R E L I M

R E

I N I T I A L

R E

A T E S T

R E

A B

E S T I M A T

P r o j e c t s U n i t a r y

K n u c k l e S l e e v e D e s i g n s D r a w i n g s

A-AVIEW

6X �n�.2500-20UNC-2B

EQ SP 60�$� APART

ON A �n�2.500 BC

SECTION B-B

TO INTERSECT

WITH �n�.375 HOLE .375-24UNF-2B �x�.25

TO INTERSECT

WITH �n�.220 HOLE, PRESS FIT PLUG

.75 LONG

GRAIN

DIRECTION

DETAIL C

SCALE 2/1

.03 X 45�$� CHAMF

.03 X 45�$�

CHAMF

DETAIL D

SCALE 2/1

DETAIL E

SCALE 2/1

PRELIMINARY DRAWING

DATE: 2024-04-23

NOT FOR FABRICATION

(�n� )5.7500

.25

R.06

(R ).125

1.221.03

.94 1.03

2X �n� THRU

TO INTERSECT

.13

2X �n� THRU

TO INTERSECT

.09

4.766

2.928 2.926

1.924

30�$�

.125

.375

( )28.531

2.00

3.69

6.31

12.47

2.1�$�

22.44

2.00

4X R

GROOVE

.125

.030 +.002 -.002

.286 +.000 -.005

.188 +.005 -.000

.030 +.002 -.002

.188 +.005 -.000

2.870 +.005 -.000

.030 +.002 -.002

.250 +.005 -.000

3.120 +.005 -.000

(R ).125 (R ).125

( ).188

(R ).125

Sheet 1

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Sheet 2

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Sheet 3

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File details come from the government source that posted it. Updated Aug 3, 2026.