Horton

[ACE-OF-ACES]

Originally Posted by tools4fools

But the Jumo added a lot of weight forward too, remember?

I think you need to take another look at my drawing!

And note the overlay I did of the BMW on the Jumo (bottom center)..

First look at the overlay of the two engines ahead of the cg and note that the BMW and Jumo occupy about the same space ahead of the cg. Which means 'very little' NEW weight was added ahead of the cg due to the replacement of the BMW with the Jumo. That is to say the two almost cancel each other out. By candled out I mean subtract the BMW weight that was there from the Jumo that is now there and you will see that very little 'NEW' weight was added ahead of the cg

Now look at the overlay of the two engines behind the cg and note that the BMW and Jumo do NOT occupy the same space behind the cg. Which means 'a lot' of NEW weight was added behind the cg due to the replacement of the BMW with the Jumo. That is to say the two do NOT cancel each other out. By candled out I mean subtract the BMW weight that was there from the Jumo that is now there and you will see that 'a lot' of NEW weight was added behind of the cg

Which means they would have to add weight ahead of the cg to maintain the cg due to the replacement of the BMW with the Jumo

Hope that helps!