Model: 8503421-916

Automatic Pilot Servomotor

Special Features:

Electrical requirements 28 vdc clutch assembly and motor tach generator; gear train ratio (power ratio) 69.8: 1, (synchro ratio) 151.2: 1; consists of a bidirectional dc motor tach generator, synchro, clutch assembly and lead assembly; the motor tach generator and lead assembly are externally mounted on a cast aluminum housing assembly; the housing assembly contains a bearing supported gear train

Properties:

Overall Depth
3.840 inches
Overall Height
4.165 inches
Overall Width
5.980 inches
Current Type
Ac
End Application
C-135 aircraft
Voltage In Volts
26.0
Frequency In Hertz
400.0
Functional Description
An automatic flight control system power unit; when coupled with the servo drum and bracket, it controls aircraft elevator and aileron surface positions; the servo motor translates electrical inputs into rotational mechanical outputs to drive a servo drum and bracket; also provides position and rate feedback signals for automatic adjustment of aircraft control surfaces
NSN
6615-01-225-8241
Part Number
8503421-916
Description
Servomotor,automatic Pilot
CAGE
07187

A component of an automatic pilot designed to convert signals received from the flight controllers into mechanical motion for actuating airframe control surfaces. It incorporates its own braking mechanism, reversing mechanism, overpower clutch, cable drum, and a follow-up circuit for returning the mechanisms to a neutral position. See also motor, control.

Part 8503421-916 NSN 6615-01-225-8241

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05172
FIIG:
T261-A
Concept No.:
App. Key:
AJ
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:
A
ESD:
A
ESD:
A
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
9.0 X 6.0 X 6.0
Paclk Weight:
6.5000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
M
SPI No.:
Z013213610
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061700
UFC:
34580
LTL:
RATING VARIABLE
LCL:
77.5
WCC:
658
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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