As mentioned previously, the vast majority of GA aircraft use Mil Spec 5606, which is flammable. Most commercial/heavy aircraft use Skydrol, which is fire resistant. They are interchangeable, but not compatible. The Early Cubs (J-3, J-4, and maybe the J-5) used DOT 3 fluid, but that was used with the expander tube type of wheel brake and would not be recommended for a more conventional type of drum or disc aircraft brake. Additionally, DOT 3 fluid is prone to boiling under a hot brake condition leaving you with no brakes under extreme conditions.
-Jeff Scott Arkansas Ozarks > Sent: Sunday, April 18, 2021 at 5:40 PM > > What brake fluid do these planes use? I didn't realize that any types of > brake fluid were flammable. > > Mike Taglieri > ________________________________ -Please see LIST RULES and KRnet info at http://www.krnet.org/info.html -Change list delivery options at https://list.krnet.org/list/krnet.list.krnet.org/ Affinity List Info Board -Search recent KRnet Archives at https://list.krnet.org/empathy/list/krnet.list.krnet.org/ -Search John Boyea's decades of archive at https://www.mail-archive.com/krnet@list.krnet.org/
