Sportcruiser
It depends
You can have a Jabiru or a Rotax and fixed or variable prop, as a home build each one is a bit different. I own a ground adjustable Rotax powers SC and have easily got into and out of 350m (one up). We have the prop set for best cruise but two up its still no prob in and out of a 500m strip. For more accurate figures you really need to base it on a particular aircraft. We dont really push it as far as short strips go, we operate out of a 700m Farm strip so somewhere south of my day to day figures is possible.
Hope that helps
Pete