Chris,

The website page for the engines is here: http://wrenturbines.co.uk/engines/turbojet/mw44gold

The engines are 600g (21oz) each and put out over 10lbs thrust; I think this compares very favourably with an EDF setup. The only thing I am wondering is how easy it will be to get the fuel tanks near the c.g. At least with these engines I will only need to find room for 2 litres of fuel (1 litre (32oz) per engine).