MIL-DTL-68G
(h)
Permissible reduction in commutator diameter.
(i)
Nominal power input and speeds.
(j)
Schematic circuit diagram.
Class 2 fans. Drawings shall contain the information specified in 3.24.1.1 and the following:
3.24.1.2
(a)
Sectional view, with additional detailed and sectional views as necessary, showing and identifying
parts of the fan.
(b)
Material identification of metal parts.
(c)
Unit weights of magnetic parts (parts whose permeability is equal to or greater than 2.0 after
fabrication).
4.
VERIFICATION
4.1
Classification of inspections. The inspection requirements specified herein are classified as follows:
a. First article inspection (see 4.2).
b. Conformance inspection (see 4.4).
4.2
First article inspection. First article inspection shall be conducted at a laboratory satisfactory to NAVSEC.
First article inspection shall consist of the examination specified in 4.5 and the tests specified in 4.6.1 through
4.6.8.1.2, and 4.6.9 through 4.6.13.
4.3
Sampling for conformance.
4.3.1 Lot. For purposes of sampling, an inspection lot shall consist of all fans of the same type and class
offered for delivery at one time; a production lot shall consist of all fans of the same type and class produced in a
given period of time.
4.3.2 Sampling for group A examination and tests. A random sample of fans shall be selected from each
inspection lot in accordance with table II and shall be subjected to the group A examination and tests specified in
4.4.1, with lot acceptance based on acceptance number equal zero.
4.3.3 Sampling for group B tests. A random sample of fans shall be selected from each production lot in
accordance with table III and shall be subjected to the group B tests specified in 4.4.2. Each production lot shall be
one month's production unless lot size would normally exceed 5000, in which case each production lot shall be one
week's production.
Table II. Sampling for group A examination and tests.
Number of fans in
Number of fans
inspection lot
in sample
2 to 15
2
16 to 25
3
26 to 90
5
91 to 150
8
151 to 280
13
281 to 500
20
501 to 1200
32
1201 to 3200
50
3201 to 10,000
80
10,000 and over
125
7
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