Game folder

code/game/objects/items/tanks/jetpack.dm

@@ -86,6 +86,36 @@
 	else
 		..()
 
+/obj/item/tank/jetpack/improvised
+	name = "improvised jetpack"
+	desc = "A jetpack made from two air tanks, a fire extinguisher and some atmospherics equipment. It doesn't look like it can hold much."
+	icon_state = "jetpack-improvised"
+	item_state = "jetpack-sec"
+	volume = 20 //normal jetpacks have 70 volume
+	gas_type = null //it starts empty
+	full_speed = FALSE //moves at hardsuit jetpack speeds
+
+/obj/item/tank/jetpack/improvised/allow_thrust(num, mob/living/user)
+	if(!on)
+		return
+	if((num < 0.005 || air_contents.total_moles() < num))
+		turn_off()
+		return
+	if(rand(0,250) == 0)
+		to_chat(user, "<span class='notice'>You feel your jetpack's engines cut out.</span>")
+		turn_off()
+		return
+
+	var/datum/gas_mixture/removed = air_contents.remove(num)
+	if(removed.total_moles() < 0.005)
+		turn_off()
+		return
+
+	var/turf/T = get_turf(user)
+	T.assume_air(removed)
+
+	return 1
+
 /obj/item/tank/jetpack/void
 	name = "void jetpack (oxygen)"
 	desc = "It works well in a void."
@@ -122,6 +152,8 @@
 	icon_state = "jetpack-sec"
 	item_state = "jetpack-sec"
 
+
+
 /obj/item/tank/jetpack/carbondioxide
 	name = "jetpack (carbon dioxide)"
 	desc = "A tank of compressed carbon dioxide for use as propulsion in zero-gravity areas. Painted black to indicate that it should not be used as a source for internals."