These large wheeled "landsailers" were the bomb.
The large wheels allowed them to be ridden on all sorts of surfaces, including hard sand and grass. The rolling resistance was so low you could easily hit 30km/hr in 5-8 knots of wind. With a bit of skill the sail could be backwinded to loose speed very quickly if required.
I spent probably twice as much time on this as I did on the water. There was a carpark and large grass areas on a headland a few hundred metres from where I lived (Wollongong NSW). The headland would cause even a light sea breeze to accelerate up the hill, making a 5 knot SE'er fully powered up and heaps of fun. Throw in a few mown grassy banks, and it was all on. I'd blast all around the carpark and grassy headland near the lighthouse most afternoons of the week (seen behind in the photo).
Crappy old wavesails were the way to go, this old 5m simmer was more than enough. By the way, that luff sleeve was the casualty of a broken mast, not a crash on the pavement. I used to put the mast base pad on the tip/head of the mast (in the days before they were sewn in to the tack of the sail).
That particular model was made and distributed by the bombora/windsurfer distributors on Sydney's northern beaches (Narrabeen?). The wide and short deck allowed them to be gybed in a very short radius (unlike the long and narrow french/british "speedsailer" type boards) and sailed naturally on both tacks.
It turned all those marginal days into great "sailing" conditions. For those who remember, note the green and yellow
Aussie mast extension and red
Rip curl one piece mast which were de rigeur for the day. How 80s are the mambo shorts.
Clarence