17 mils in level bombing ??? Impossible, I think you took the "impact angle" instead of "sight depression from flight path mils" column.
But anyway after several hours of reading and tests it seems there some issues... at least with Mk-82LDGP (I didn't have tested other bombs yet).
According to this manual ("Aircrew Nonnuclear Weapons Delivery Manual" T.O. 1F-5E-34-1-1 for the F-5E") and his "mission planning form" (start reading from p.264):
Sight depression setting = Sight Depression from Flight Path + Rangewind Correction + ZSL Angle of Attack
_Sight Depression from Flight Path: From bomb tables.
_Rangewind Correction: I did my tests in no wind condition so I don't use this value actually.
_ZSL (zero sight line) Angle of Attack: From angle of attack chart. ZSL AoA = FRL AoA (A+B+C) - 35 Mils ; I don't use Flaps so "C"=0.
I did my tests with 2x Mk82, a CL external fuel tank of 275Gal. and a Gross WT of 16000lbs at my airstart/attack position (obviously).
=> Dive Angle 30°; Release Altitude 2000ft; Release Speed 440Kt; I start my dive from 6000ft 350kt as per Belsimtek manual.
_With Weapon Delivery Manual, I found a sight depression of 102 mils = Bombs fall far too long...
_With Belsimtek Manual, it says 79 mils = Bombs fall too long...
To have the good parameters in dive is not really easy so I tested in level bombing too:
=> Leveled flight; Release Altitude 500ft; Release Speed 440Kt; same payload.
_With Weapon Delivery Manual, I found a sight depression of 144 mils = Bombs fall far too long... (Even with only bomb table and no ZSL AoA it give 131 mils and bombs fall too far too).
So:
_ I am a bad pilot who can't respect parameters (but I don't think so) ?
_ or I am wrong with tables/charts calculations ?
_ or there is an issue with Belsimtek F-5E ?
_ or there is an issue with Eagle Dynamics Mk82 flight model ?
_ or a mix of the above ?
:book: :joystick: :book: :joystick: