Who's the forum flight test SME, was that
@Byeman ?
How much extra stuff does dropping from an internal bay add to a flight test schedule. I know you're going to be flopping doors at all sorts of speeds and watching flutter, some basic test shapes with serious internal pucker the first drop hoping the computer was right and the store drops clear.
If you limit the wording to “flight test schedule” then it ain’t much because a live fire is a live fire. You might for a few extra flights to characterize your flight dynamics with weapons bay doors opening and closing without dropping; you might do it on the same flight at a later test point. But IMO phrasing the question this way is somewhat disingenuous. Adding a weapons bay adds a huge chunk of engineering work and testing that needs to be done that you otherwise wouldn’t need to do. So it might not add to the “flight test schedule” by a lot, but it is going to affect the overall schedule.
How much it adds to the overall schedule depends on how much resource you decide to throw at it and how much of the work you can parallelize. You can compress some of the schedule by throwing more engineers at it but some of the stuff just can’t and must be done serially. But at the end of the day you will need to do a lot more engineering work and testing with a weapons bay vs not having one.
Some of the things you have to do with a weapons bay are things like captive trajectory (CTS) wind tunnel test to make sure your weapons clears the aircraft cleanly. You will also need to do a longer wind tunnel test because you have to get aero data with doors open and closed. After you’ve actually build some aircraft, you’d have to do a pit drop of stores from the weapons bay to ensure your mechanism for ejecting the payload works and ejects the store at the speeds you predicted. All of this is extra work you will have to do on the ground before doing a live fire test.
A rail launch doesn’t need a drop test because the missile flies itself off a completely passive rail. On a rail launch the missile is active on the rails and will start stabilizing it self as soon as it clears the rails. and the rail constraint the launch vector of the missile which generally ensure a high probability that the missile gets a clean separation.
For a drop launch, the missiles’s initial state is unconstraint. This means you have to do a lot more engineering work to make sure the missile will clear the aircraft when it is launch at different AoA/AoS, speed, and altitude (all of these things affects the initial trajectory of the missile). YouTube is full of store separation mishaps
videos where the weapons comes back and hit the launching aircraft. This adds a lot more engineering work to the overall schedule.
Sure, Andruil will have to do pit drops and maybe additional wind tunnel tests to clear dropping bombs off Fury, but you can do that well after you’ve done your AIM-120 rail launch. Dropping bombs off increment 1 CCA is also a stretch goal of the program and not a critical feature that Andruil has to demonstrate (that we know of anyways).