Jim
I think you are asking for a lot with just avionics upgrades. Have you seen any W&B history for this plane? If there is any history this might clue you in to something that added a lot of weight at some point. With avionics update I would guess you might gain 20 or 25 lbs, that would be a lot.
There are lots of mistakes made in W&B calculations too. Look closely at the sheets
__________________
Herb R Harney
1968 337C
Flying the same Skymaster for 47 years
|