A table substitution to convert from feet to meters plus formula pre-calculation to know QFE in Targets of oportunity.
To calculate the QFE of an area we can use the formula QFE=QNH-(Target altitude in meters / 9.3) The problem for us we use VR is that we don't have any calculator inside the cockpit so we have to do the math by head. Here I put in the yellow "-qfe" colums the division of the target altitude in feet we can have from the F10 map of part of the formula.
So for example if our target is at 500 feet, we look in our table and the -qfe yellow part will say "16.4" that is the result of converting 500 feet into meters = 152 meters (in the table also) and then dividing that 152/9.3 = 16.4.
So we can just make by head the substraction of the QNH that we have in our kneeboard converted into Hpascals minus 16.4. Making it much more easy for us in VR.
Instalation. Just unzip the content into savedgames dcs beta (or final) so it will create inside Liveries (if not have that folder will create one) the AJS37 folder and inside the FormulaTable. Once inside DCS program, choose the cockpit livery in extra options for the viggen.
