Yeah I remember discussing this with you. When I tried the Pro Zinger 15x4 it bogged the engine down to around 8800 RPM and generated nowhere near the thrust of the 14x4w. As I said, I think my .82 was defective. I've got a new one coming early in the week so I'll give it another try. Although, I have sanded the crap out of the Zinger, so it's not exactly stock anymore.
ORIGINAL: daveopam
RVM, I ran the 15x4W APC for a long time on mine. It does have a harder pull than the Zinger. I like the Zinger because the spool up is instant. The APC is so heavy it would shake the airframe every time I goosed it. If someone was picking a prop with max thrust as their only consideration. The APC 15x4W would be first with the Zinger second and 14x4W third.
david