In the video they used a 100cc DA and as you see it had bags of power and they did say a 60cc would do it on a long runway, We only have a few of those up North. I am no expert with air towing but I think its all about get up into air quickly,
Maybe our ace designer guru could do a short kit for us.
A team build glider Ireland Blanik :?: :?: :?: :?: :?: :?:
Here is one I saw fly last year.