80cm span was a guess but a search on Google indicated i wasnt far off..
Here's a 64mm EDF L-39.. it just happens to be 80cm wing span:
http://www.cmldistribution.co.uk/cml...tId=0000004543
And an L-39 powered with a slightly larger 70mm fan.. it's 89cm span:
http://www.cmldistribution.co.uk/cml...tId=0000004543