Model: 7R911-21A

Transmitter Synchro

Properties:

Body Material
Steel, stainless
Body Style
Standard round c
Shoulder Diameter
Between 0.9995 inches and 1.0000 inches
Pilot Diameter
0.6250 inches
Overall Length
2.2380 inches
Flange Diameter
1.0620 inches
Flange Thickness
0.0930 inches
Undercut Diameter
0.9800 inches
Undercut Width
0.0500 inches
Shaft Diameter
0.1195 inches single shaft and 0.1200 inches single shaft
Shaft Length
0.2830 inches single shaft
Schematic Diagram Designator
1 y-rotor, 1 stator
Fragility Factor
Moderately rugged
Body Size
11
Rotor Input Voltage Rating In Volts
26.0
Frequency In Hertz
400.0
Rotor Input Current Rating
280.0 milliamperes
Rotor Input Electrical Power Rating
950.0 allqjaa3.500 finished-chamfered
Zro Impedance Magnitude In Ohms
107.00
Zro Impedance Angle In Deg
81.70
Zso Impedance Magnitude In Ohms
18.10
Zso Impedance Angle In Deg
79.50
Zrs Impedance Magnitude In Ohms
23.00
Zrs Impedance Angle In Deg
23.90
Rotor Dc Resistance In Ohms
9.00
Stator Dc Resistance In Ohms
3.00
Phase Shift Angle In Deg
7.000 input to output
Maximum Fundamental Null Voltage In Millivolts Per Volt
15.00 output
Maximum Total Null Voltage Output In Millivolts Per Volt
20.00
Electrical Error Angular Range In Minutes
-7.0/+7.0
Actuator Friction Torque At Minus 55 Deg Celsius
16.0 centimeter-grams
Actuator Friction Torque At Plus 25 Deg Celsius
4.0 centimeter-grams
Alignment Hole Quantity
4
Shaft Radial Play Test Point
0.125 inches
Shaft Maximum Radial Play
0.0008 inches
Shaft End Play
0.0015 inches
Pilot Length
0.0620 inches
Shoulder Length
0.0620 inches
Mounting Surface To Terminal End Distance
1.9550 inches
Shaft Maximum Runout
0.0010 inches
Terminal Location
Side
Shaft Slot Depth
0.0300 inches single shaft
Shaft Slot Width
0.0300 inches single shaft
Shaft Type
Round, slotted single shaft
Alignment Hole Depth
0.0700 inches
Transformation Ratio
0.454 rotor to stator
Alignment Hole Bolt Circle Diameter
0.8120 inches
Shaft Radial Play Determining Weight
4.0 ounces
Shaft End Play Determining Weight
8.0 ounces
Terminal Type And Quantity
5 wire lead
NSN
5990-00-682-9933
Part Number
7R911-21A
Description
Synchro,transmitter
CAGE
88818

A synchro consisting of a stator and rotor inductively coupled. The electrical output of the stator into a receiver synchro, a control transformer or differential synchro is dependent upon the position of its rotor. Does not include variable resistors, goniometers, variable transformers, or items with dials.

Part 7R911-21A NSN 5990-00-682-9933

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
02073
FIIG:
A07800
Concept No.:
1
App. Key:
H
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
062120
UFC:
34760
LTL:
RATING VARIABLE
LCL:
--
WCC:
593
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 9014900000
  • SITC: 87412
  • End Use: Marine engines, parts
  • NAICS: 334511
  • USDA: 1

Freight Class: Parts & accessories for direction finding compasses and other navigational instruments and appliances

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