MIL-PRF-27197E
and shall indicate, in terms of IAS, the EAS which has been set into the instrument by means of
the adjustment on the rear of the indicator. The pointer shall be adjustable from 600 to 800 knots
EAS in 10 knots increments. AN MAEAS adjustment conforming to Figure 1 shall be provided
on the rear of the indicator. The scale of adjustment shall conform to Figure 1. The mechanism
shall allow the values of EAS between the numerals to be set by linear interpolation between the
numbers of the scale.
3.4.4 IAS index set knob and index pointer. An IAS pointer shall be provided as shown on
Figures 2 and 5. The setting of IAS pointer shall be controlled by the IAS index set knob shown
in Figure 2. The IAS index pointer shall be adjustable from 100 to 70 knots (minimum) IAS
within ±1 knot. The IAS index pointer shall conform to Figure 5.
3.4.5 Case. The case shall conform to Figure 1. The case shall be entirely covered with a
durable, lusterless black finish conforming to color number 37038 of FED-STD-595.
3.4.6 Bezel. The bezel shall have a lusterless black finish conforming to color number 37038 of
FED-STD-595. The bezel shall be securely attached to the case.
3.4.7 Pointers. The IAS and MAEAS pointers shall conform to Figure 5.
3.4.8 Cover glass. The cover lass shall conform to MS28105 and shall be replaceable. If the
cover glass is used as part of the lighting system, its size and shape may deviate from the
dimensions specified on MS28105 to the extent required for proper lighting design.
3.4.9 Reflection-reducing coating. All reflecting surfaces shall be reflection-reduced according
to MIL-C-14806.
3.4.10 Integral lighting (AVU-8B/A and AVU-8C/A only). The indicator shall incorporate
parallel lighting circuitry as shown Figure 1. Other lighting requirements shall be specified in
acquisition document (see 6.2), and shall operate on 5Vac or 5Vdc.
3.4.11 Dial. The indicator dial shall conform to Figures 2 and 3. The style and proportions of
the numerals and letters shall conform to MS33558. Each numeral shall distinctly the graduation
to which it applies. The graduation shall be located on the dial as shown on Figures 2, 3, and 4.
3.4.12 White markings (AVU-8B/A and AVU-8C/A only). The markings in Table I shall be
finished in lusterless white color number 37875, or semi-gloss gray, color number 36595, of
FED-STD-595 (see 6.4.1). The dimensions of the markings shall conform to Table I.
3.4.13 Fluorescent luminescent material (ME-4 only). The markings in Table I shall be finished
in Fluorescent luminescent material (see 6.4.2). The dimensions of the markings shall conform to
Table I.
5
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business