ORIGINAL: raido56
[ Now the 2nd one has these motors in it
http://shop.eflypower.com/shop/views.asp?hw_id=1108 and I use a 6 blade set up and take off from a grass runway no problem and these are also 1/2 the price of the E-Flight motors. I like the 2nd set of motors the best as they are 3800 Kv just make sure your battery packs can put out 30 amps min.
I have those same MAXII 400-3800kv motors. They fit the EDF fans in the airliner without modification since the motor shafts are the same size. I put the MAXII motors in SF 68mm fans and this was the static results on test stand.
MAXII 3800 on SF 68mm 6-blade fan using 1 x 2100 TP 3s batt.
AMPS: 30.3
WATTS: 301
THRUST: 500grams
This was without the front curved part affixed to the fan housing.