Does anyone know motors for planes which produces thrust above 5kg with 6s battery and 1000w power limiter?
Prop size would be-15*4 to 16*8(max).

You can check in www.ecalc.ch . You can use trial version else spend few bucks, you can find more data.

check this 6 KG thrust

http://hobbyxyz.com/PROPDRIVE-v2-5050-580KV-Brushless-Outrunner-Motor-multirotor-drone-rcstore-lipo-battery-rchobbyshop-in-delhi-india