altoslib: Use feet per second for imperial speed

[fw/altos] / altoslib / AltosConvert.java

diff --git a/altoslib/AltosConvert.java b/altoslib/AltosConvert.java
index 25bbf7a0c7709af62752f95685580a7b66f6a0f6..265b5f0f633e26a544203d83b188a52971166468 100644 (file)
--- a/altoslib/AltosConvert.java
+++ b/altoslib/AltosConvert.java
@@ -325,6 +325,14 @@ public class AltosConvert {
                return miles_to_meters(mps) / 3600;
        }
 
+       public static double mps_to_fps(double mps) {
+               return meters_to_miles(mps) * 5280;
+       }
+
+       public static double fps_to_mps(double mps) {
+               return miles_to_meters(mps) / 5280;
+       }
+
        public static double meters_to_mach(double meters) {
                return meters / 343;            /* something close to mach at usual rocket sites */
        }