Yes, I made a submersible airplane. Strange and I made it up as I went but with the ultimate goal of a sub plane. Looks like a SF-50 and Ekronoplane had a baby! Works well and looks like a cool research/concept aircraft. I was going to make it military but I like civil air crafts. Make sure to read instructions well! One of the things I really wanted was the jet closing/sealing itself. Its cool to land in the sea and then close up the jet and dive. I also wanted it to feel like a bulky heavy aircraft and keep the agility of a small jet aircraft. I believe I successfully did that, at high speed it flys nimble and at low speeds it handles like a small airliner so it’s easy to flare and land and stuff.

Airplane

Activation Group 1 : Open/close Engine Seal
Activation Group 5 : Landing Lights
Activation Group 6 : Anti Collision
Activation Group 7 : Navigation Lights
Throttle : Engine Thrust (AG-1)
Trim : Trim
VTOL : Listed Bellow
Normal Flight Controls

Ready to take off

Submersible

VTOL : Up/Down Dive
Throttle : Thrust
Activation Group 1 : Deactivated In Sub Mode
Fly like a normal plane, only under water.

Dive Phases!

DARPA's strategic technology office wants an aircraft that can reach a destination, whether it is 1,850km (1,000nm) away by air or 185km by sea or 22km travelling underwater, in less than 8h.

Carrying a crew of eight and 910kg (2,000lb) of payload it would use a snorkel to provide its powerplant's air supply while submerged at shallow depths once at its target. The submersible aircraft would be used for inserting small clandestine teams along coastal waters. After the insertion it could then loiter for up to three days, perhaps at the surface, until the crew rejoined it.

DARPA admits that past efforts in the same area included failed designs to make a submarine fly: "Prior attempts to demonstrate a vehicle with the manoeuvrability of both a submersible and an aircraft have primarily explored approaches that would endow flight capability to platforms that were largely optimised for underwater operations. Unfortunately these attempts have been unsuccessful."

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ACEPILOT109 3/11/2020