diff --git a/.obsidian/plugins/obsidian-git/data.json b/.obsidian/plugins/obsidian-git/data.json
index 7b1247f..4bc189e 100644
--- a/.obsidian/plugins/obsidian-git/data.json
+++ b/.obsidian/plugins/obsidian-git/data.json
@@ -2,7 +2,7 @@
   "commitMessage": "vault backup: {{date}}",
   "autoCommitMessage": "vault backup: {{date}}",
   "commitDateFormat": "YYYY-MM-DD HH:mm:ss",
-  "autoSaveInterval": 1,
+  "autoSaveInterval": 5,
   "autoPushInterval": 0,
   "autoPullInterval": 5,
   "autoPullOnBoot": false,
diff --git a/education/unmanned aerial system/final.md b/education/unmanned aerial system/final.md
index b570360..cc59a28 100644
--- a/education/unmanned aerial system/final.md	
+++ b/education/unmanned aerial system/final.md	
@@ -6,4 +6,6 @@ An sUAS accident must be reported to the FAA within 10 days.
 
 Lightning is considered the most hazardous condition when flying in the vicinity of thunderstorms.
 
-The presence of ice pellets at the surface is evidence of a temperature inversion, with freezing rain at a higher altitude.
\ No newline at end of file
+The presence of ice pellets at the surface is evidence of a temperature inversion, with freezing rain at a higher altitude.
+
+Angle of attack is the angle between the wing chord line and the relative wind. 
\ No newline at end of file