Greetings,I am working on an xml gauge to control smoke effectson float planes; I want the water to fall off the floatsfor four seconds after take off or when skimming the water.Engine smoke still works while this happens... (A:RADIO HEIGHT,feet) 11 > (A:AIRSPEED INDICATED,knots) 65 > (A:AIRSPEED INDICATED,knots) 205 < && && if{ (>K:SMOKE_ON) } els{ (>K:SMOKE_OFF) } The above gauge works on float-only planes, not amphibians, so Itried the following; without success :( (A:RADIO HEIGHT,feet) 11 > (A:AIRSPEED INDICATED,knots) 65 > (A:AIRSPEED INDICATED,knots) 205 < (A:SURFACE TYPE,flags) 8 == && && && if{ (>K:SMOKE_ON) } els{ (>K:SMOKE_OFF) } I thought testing for surface type would stop the effect on land?Any ideas would be appreciated!JR

JR, My guess is that you are on the right track.. The only thing I would consider would be if the (A:Surface type, tags) toggles when only on the surface itself. ( I.E. not in the air ). You may want to make a string to display the surface flags to confirm operation. (A:RADIO HEIGHT,feet) 11 < (A:SURFACE TYPE,flags) 8 == & if{ 1 (>G:Var1) }The above would trigger G:Var 1 to say, "yes I am on the water" :-) and allow the following to occur.(A:RADIO HEIGHT,feet) 11 > (A:AIRSPEED INDICATED,knots) 65 > (A:AIRSPEED INDICATED,knots) 205 < (G:Var1) 1 == && && && if{ (>K:SMOKE_ON) } els{ (>K:SMOKE_OFF) }(A:RADIO HEIGHT,feet) 161 > if{ 0 (>G:Var1) }The above would turn off the flag saying, "I just took off from the water" after 150 ft RA.Good luck,,, and GREAT IDEA !!!!!Regards,RomanProject 737-400