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ntroduced in 1996, Skydrol 5 was the first Type V fluid qualified under the Boeing BMS 3-11 specification. Skydrol 5 offers higher temperature capability than Type IV fluids, the lowest density, and better paint compatibility. Skydrol 5 does not have universal air frame manufacturer approval, so consult Eastman's Skydrol Technical Service (800-260-4150) for specific approval and application information.
Method Typical Value, Units
Acid Number (mg KOH/g) 0.10 Maximum
Appearance Clear, oily liquid
Autoignition Temperature ASTM D 2155 399 °C (750 °F ) Minimum
Color Purple, essentially equivalent to intensity and hue standard
10 ppm, Maximum
50 ppm, Maximum
30 ppm, Maximum
Flash Point COC 154 °C (310 °F ) Minimum
Moisture 0.20% Maximum
Particle Contamination a
5-15 micron size
15-25 micron size
25-50 micron size
50-100 micron size
Over 100 micron size
Pour Point -62 °C (-80 °F ) Maximum
Specific Gravity @ 25°C/25°C 0.970-0.980
@ 99°C (210°F)
@ 38°C (100°F)
@ -54°C (-65°F)
2600 cSt Maximum
a NAS 1638 particle counts per AS4059F