Calculated Industries Hot Rod Calc 8703 User Manual

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H OT ROD CALC ™ — 21conditions are an unseasonably chilly 33° F, absolute pressure of28.77 in Hg, and a relative humidity of 64% at 8:30 a.m.Calculate the Air Density Index (ADI) and Density Altitude for thisexample.KEYSTROKES DISPLAY 0.1. Enter current local measured weather conditions:   TEMP S 33. °F(Absolute Pressure) P-ABS S 28.77 INHG  (Moisture/Relative Humidity) RH% S 64. %2. Calculate ADI and density altitude: ELEV S 0. ADI 101.002 % D-ALT - 341.909 FWhile these weather conditions at Firebird International Racewayare unlikely, this example demonstrates an ADI value of over 100%which is certainly a possible situation. As stated previously, airdensity is typically over 100% when temperatures are well below60 °F.Calculating ADI and Density AltitudeUsing ElevationFor this example, you are at Top Gun Raceway in Fallon, Nev.,and only have access to air temperature and humidity data.However, you know the track’s elevation is about 3,963 feetabove sea-level. With these three variables — air temperature,humidity, and elevation — you can still calculate ADI and DensityAltitude. The current weather conditions are posted as 51° F and5% relative humidity at 9 a.m.