The way I do it to make accurate curve of any description.
2 or 3 stakes (short bamboo canes or similar) a long loop of string a funnel fine dry sand (or I use ground seaweed as I've got lots of it)
If you just want an oval use 2 stakes, loop the string around them and with your finger in the string loop, test to see if you get the curve you want - it takes a bit of experimenting. If you need a tighter or looser curve, use the 3rd stake to tighten or loosen the curve.
When the curve is as you want it, put the sand-filled funnel inside the string loop and mark out your perfect curve
Good luck!
Billericay - Essex
Knowledge is knowing that a tomato is a fruit. Wisdom is not putting it in a fruit salad.
Posts
The way I do it to make accurate curve of any description.
2 or 3 stakes (short bamboo canes or similar)
a long loop of string
a funnel
fine dry sand (or I use ground seaweed as I've got lots of it)
If you just want an oval use 2 stakes, loop the string around them and with your finger in the string loop, test to see if you get the curve you want - it takes a bit of experimenting. If you need a tighter or looser curve, use the 3rd stake to tighten or loosen the curve.
When the curve is as you want it, put the sand-filled funnel inside the string loop and mark out your perfect curve
Good luck!
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.