Cant find the prop size in the FM. Do you know the name? Also found this....
[Mass]
Empty 2500.0
TakeOff 5200.0
I'm wondering if the take off wiehgt is too much.
But it's historical parameter, I find.
There is need to check the parameter.
Here is B7A1's spec from the IJN official spec seat written in 1945(I copied it at the Military Archival Library of the National Institute for Defense Studies in Tokyo).
Weight section says that empty weight(Ji jyuu)=3674kg and Take off(Seiki)=5700kg.
However, range section tell us more information.
There are three loading/range values.
It says that 5700kg/1000nmile when take off condition(Seiki), 6390kg/1640nm when loading(ka kajyuu) and 6590kg/1610nm when torpedo loading.
From range value, we can know take off condition doesn't mean 100% of fuel .
So we must predict FM's take off weight from torpedo loading weight(no information about content when loading condition).Sorry, FM's take off value will be maximum take off value that is reference to determine the envelope of flight.