given the configuration of a plane.How can we decide maximum vertical height reached by it and how can we increase it??
Max. height is a combination of many factors, with (for a given aircraft configuration) the Density of air at that max. altitude being the critical factor
With more thrust (faster engine) you would get more lift thus more height before gravity & lift are equal again
Could try a different aerofoil section eg an undercambered wing for more lift
This has been discussed here at reply #45 (http://www.rcindia.org/rc-general-topics/basic-aerodynamics-for-rc-flying/msg49780/#msg49780)
indushekhar - you have asked the question in such a way that makes it
difficult - if not impossible to answer.
its like asking - given two legs what is the fastest a man can run and how can we increase it ?
tell us what particular plane you have in mind and then we can advise you.
otherwise all general questions will be met by general answers.