RE: STOCK POWER SYSTEM (Park Zone 480 Outrunner with 960Kv and E-Flite Switch mode 30-AMP ESC)
I have tried lots of other combination of Battery and propeller size/pitch on my T-28 Trojan.
It is just a fantastic model that $$ can have! Best flying Park Flyer and very robust landing gear and nose wheel steering for this size of a model.
Before you opt to change out the very capable Stock Power system, I have used many Propellers and Battery sizes, discharge rates.
Here is what I have discovered and like to share for those that would like to spice up their T-28 Flying Experience using the STOCK Power system.
For really great looks and super combination of airspeed and thrust:
3-Cell, 2200mAH, 25C Discharge Li-POLYs and Master Airscrew 3-Blade (10 X 7 X 3)
This combination really shines and provides super control for continuous Knife Edge flying all around the field.
For those that really like to fly the T-28 Trojan like if it had Flaps:
3-Cell, 2200mAH, 20C or 25C discharge Li-POLYs and GWS 4-Blade (10 X 8 X 4)
I can say that the airspeed is somewhat reduced due to the large paddle airfoil the GWS 4-Blade has but, it provides some impressive thrust and the model comes in like it had flaps!
Make no mistake, using the 25C discharge Li-POLYs the model still has some good airspeed.
NOTE: GWS 4-Blade propellers come in three colors and I get them from BP Hobbies at a great price, additionally you need to pay close attention when you ream the propeller hub on these because they are made of plastic so, if you use a drill you need to drill for a few seconds and STOP for a while to allow the hub to cool and then, resume. Otherwise, if you continue to drill (ream) the prop hub without any rest the hub will deform.
Hope this helps for those wanting to keep the STOCK Power system for just a little longer.