Thanks for the fast and simple answer!
So I suppose that since every motor has 400+ grams of thrust I will have 1200 grams max of thrust on the tri? How long flying time with a 1300mAh 3s or a 2200mAh 3s? Will I need higher C rating than 20C - 30C?
Would it use RD or DD props?
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10048
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10046
I also need the correct prop adapter for the Blue Wonders. Anyone?
I might consider building a tri because of the special opportunities it can bring!
In general you can count with 3 times the thrust mention, so 1.2 kg on the tri. I never measured it but it is enough for carry a 0.5ltr full water bottle around ;-) Tri to get it in hoover at half throttle, then it is perfect.
A 1300mah will not give a long flying time. Even very short and can be 'dangerous' for quickly being out of power and crash. A 2200mah is better, gives about 5 minutes max. I start using 2650, 3300 and 4000 mah's to get some more time to practice and not worrying when to land. Remember to program the esc's in Ni-xx type.
C-rate? As high as possible. Turnigy Nano Techs are the best (20-50C are enough). Make sure you use a voltage alarm (led's + accoustic).
Those HK props will work but need quite a bit of CA tweeking for the correct balance. Best it to get the original APC Slow Flying props. Very sturdy and perfectly balanced out of the bag. Little more expensive .. get those when you have a good trimmed tri/quad.
Prop adapters for the BW should be 3mm. The collet type are shorter then the ones with 'grub screws'. Then you need very good balanced props ..
http://www.hobbyking.com/hobbyking/store/__5572__KD_Colet_adapter_for_3mm_shafts.html
But always back order. Try to get them on ebay or something, very cheap but get more then you actually need as they can be badly balanced.