What you're missing is the effect of speed and altitude on engine performance. Please take a look at this (pdf): http://citeseerx.ist.psu.edu/viewdoc/download?

What you're missing is the effect of speed and altitude on engine performance. Please take a look at this (pdf): http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.167.7314&rep=rep1&type=pdf http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.167...