Having driven past this airstrip and read the signs alluding to the presence of a model aircraft club, I suspect the only aircraft operating from here are rather small... but the site itself suggests that a larger airstrip was once in operation.
Forestry Commission, perhaps? Wartime spotters strip? Emergency strip?
Here is an updated list of Sydney's airports.
Shops and services Jargon-free PC Help Quality tech products Bike gear Books, games, DVDs Photography tips and tricks My Most Popular Blogs Photography tips and tricks Alfa Romeo Tipo 116 My Opinion Business, Opinion and Nonsense Airliners Business blogging My Opinion More Business blogging Myths and legends Photography Photography tips and tricks History Sydney history Bikes and bike racing Bike racing Bike racing for beginners Bike racing 101 Doper's guide to bike racing Cars - and Alfa Romeos Alfa Romeo Tipo 116 GTVeloce Style