TB 55-5210-251-35/1
Section I. IDENTIFICATION AND DESCRIPTION
1. Test instrument identification (unit-under-test). This bulletin provides instructions for the periodic calibration of
blade protractor, model PE-105. It is to be used by personnel trained and qualified in the use of calibration equipment.
2. Descriptive data.
a. Identification
Nomenclature ----------------------------------------------------------------------------- Protractor, blade
Federal stock number ------------------------------------------------------------------ 5210-394-5094
Manufacturers ---------------------------------------------------------------------------- Hamilton Standard Division of United
Aircraft Corp., and Taft-Pierce Co.
Manufacturer's model number -------------------------------------------------------- PE-105
Size------------------------------------------------------------------------------------------ 24 in. long X 10 in. high X 3 in. wide
Weight -------------------------------------------------------------------------------------- 6 pounds (approx)
b. Calibration
Time required ----------------------------------------------------------------------------- 1 hour (approx)
Technique---------------------------------------------------------------------------------- physical
3. Forms and records. Maintenance forms, records, and reports which are to be used by calibration personnel at all
calibration levels are listed in and prescribed by TM 38-750. Annotate DA Form 2416, Calibration data card, in
accordance with TM 38-750.
4. Calibration description. Test instrument parameter and performance specifications which pertain to this calibration
are listed in table 1.
Table 1. Calibration description
Test instrument parameters
Performance specifications
Angle range
0to 24from horizontal
Accuracy
+.002 in. beam linearity
5. Reporting of errors. The reporting of errors, omissions, and recommendations for improving this publication by the
individual user is encouraged. Reports should be submitted on DA Form 2028, (Recommended Changes to
Publications) and forwarded direct to Commanding General, U.S. Army Aviation Systems Command, ATTN: AMSAV-R-
M, P.O. Box 209, St. Louis, Missouri 63166.
Section II. EQUIPMENT REQUIREMENTS
6. Equipment required. Table 2 identifies the specific equipment used in this calibration procedure. When any of the
equipment is not available, equivalent items may be substituted provided they meet minimum specifications.
Table 2. Minimum specifications of equipment required
Item
Nomenclature
Minimum use
Calibration equipment
No.
specifications
identification
A1
GAGE BLOCKS
RANGE: 0 to 6.0625 in.
5210-516-3825
ACCURACY: +.0001 in.
A2
DIAL INDICATOR
RANGE: 0 to .008 in.
5210-273-9791
ACCURACY: .0005 in.
2
