its probably not possible. jumping is largly attributed to form and natural ability. strength is a secondary factor. some good drills and the right excercises could see you hit maybe 25-28 depending on what areas of improvement are available.
"The jump reach, for a true vertical jump test, is to jump straight up without taking a step and touch the highest point possible. I hear people talking about vertical jumps above 40 inches, but those are not true vertical jumps. Most NBA players have vertical jumps in the 28 - 34 inch range."
thats not true because in nba live 2005 the annoncor says something about steve franicis vertical in the 40's and like the guys from slam nation and stuff
You asked if it was possible, and we told you no. Did you already have your mind made up on this or what?
Maybe you just don't agree with the figures we gave. I've done digging and found sources that says some NBA players can vertical jump up to 39", even 43"....but remember these guys didn't train for less than a year like you're planning on doing.
In conclusion:
SOME NBA players can vertical jump 41 inches
Others can not, even after years of training
You MAY be able to vertical jump 41 inches at your peak performance....but don't be disappointed if:
it takes you more than 8 months like you were planning
you never actually make it to 41 inches, though you tries your hardest
Yeah let's not forget to set real goals for ourselves based on real possibilities...NBA players and professional body builders do their thing 24/7...they don't have other jobs and usually no other responsibilities to take care of.