TR Navy ULAQ ¦ SANCAR ¦ MIR ¦ SALVO | Unmanned Surface Vehicles, News and Updates

[Iskander]

I'mSo, where are they ?

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.independent.co.uk/news/world/americas/us-military-manta-ray-drone-b2538410.html&ved=2ahUKEwiv0dfBiqmRAxVrXkEAHRmMNFkQr4kDegUI2AEQAA&usg=AOvVaw3DL9MF5ckvrSmQaXGXimS_

 

[Zafer]

View attachment 78520

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.independent.co.uk/news/world/americas/us-military-manta-ray-drone-b2538410.html&ved=2ahUKEwiv0dfBiqmRAxVrXkEAHRmMNFkQr4kDegUI2AEQAA&usg=AOvVaw3DL9MF5ckvrSmQaXGXimS_

It has a lot of wetted surface that creates drag, unlikely to have any amount of speed. It is bound to fail if not has failed yet.

 

[Mis_TR_Like]

Those IDAs should start using hydrofoils for smooth sailing on waves

In addition to the cost factor, the main purpose of a USV is to be stealthy. Their size and low above-water-line silhouette plays a great role for them in satisfactorily performing their job. A hydrofoil would have a much bigger radar signature.
Semi submersible or just below waterline USVs (like the drug smugglers use) would be more efficient. With electric engines and correct propellers they can be built to be very quiet and fast.
Ukraine already has one in the pipeline called toloka and being updated in to a family of drones.
France, UK, Russia and many more are working on the idea of uncrewed submersible sea vehicles.

Ukrainian underwater drone Toloka is being updated: what's new in the TLK-150 model - Militarnyi

During a Ukrainian defense industry presentation, the developers of the Toloka underwater drone demonstrated its updated smallest model.

militarnyi.com

So, where are they ?

Funfact, submersibles (not actual submarines which typically visit +200 meters depth) are easier to build and operate in comparison to hydrofoil planning hulls.

MSB AR-GE presented a semi-submersible concept at IDEF 2025

https://www.defenceturk.net/wp-content/uploads/2025/07/MSB-AR-GE-IDA-2.jpg

No doubt TSK wants some, will likely see a few companies pump out armed models at the next IDEF or SAHA

 

[Anmdt]

MSB AR-GE presented a semi-submersible concept at IDEF 2025

https://www.defenceturk.net/wp-content/uploads/2025/07/MSB-AR-GE-IDA-2.jpg

No doubt TSK wants some, will likely see a few companies pump out armed models at the next IDEF or SAHA

MSB Ar&Ge (MinDef R&D) is the biggest scam of last 5 years, they also presented a 'torpedo'. And this USV had nothing concrete planned.

 

[Anmdt]

It has a lot of wetted surface that creates drag, unlikely to have any amount of speed. It is bound to fail if not has failed yet.

von Karman is turning around in his grave. Drag coefficient listed below also is valid for certain speed ranges, and this UUV has a purpose of having 'wings' using lift to drag transition to sink - advance just by using buoyancy different in glider mode.

 

[Iskander]

... It is bound to fail if not has failed yet.

Insha'Allah

 

[Zafer]

von Karman is turning around in his grave. Drag coefficient listed below also is valid for certain speed ranges, and this UUV has a purpose of having 'wings' using lift to drag transition to sink - advance just by using buoyancy different in glider mode.

View attachment 78524

Does it even work, there s no telling. I don't know how it genaretes propulsion.

Darpa does lots of failed proects.

 

[boredaf]

Does it even work, there s no telling. I don't know how it genaretes propulsion.

Darpa does lots of failed proects.

Digging in your heels, I see. It has been going through sea trials and it generates propulsion through 2 propellers on both sides, how else? And yanks are not the only ones doing a manta ray style underwater drone, China also has one in the works.

 

[Yasar_TR]

It has a lot of wetted surface that creates drag, unlikely to have any amount of speed. It is bound to fail if not has failed yet.

Is that why submerged submarines can go faster and longer?
You need to study aqua/hydrodynamics for submerged vehicles and their drag coefficients and cavitation effects.
If you are designing under water vehicles, you design them with a shape that will make their movement to be most efficient when submerged.

 

[Anmdt]

Does it even work, there s no telling. I don't know how it genaretes propulsion.

Darpa does lots of failed proects.

Underwater gliders work for decades, just because you haven't heard of, it also doesn't mean if it works or not.

Is that why submerged submarines can go faster and longer?
You need to study aqua/hydrodynamics for submerged vehicles and their drag coefficients and cavitation effects.
If you are designing under water vehicles, you design them with a shape that will make their movement to be most efficient when submerged.

It differs by design principle, a submarine's shape is a must, to offer a habitable space and volume for equipment - structural integrity at greater depths. Remove the human the shape begins to vary depending on the strategy, depth. Manta-Ray is essentially a glider and needs a decent lift-to-drag to propel by buoyancy difference.

Cavitation is rather a funny phenomena, most torpedoes have inverted hydrofoil sections on rudders to avoid cavitation and maintain lift.

So it needs a decent amount of studying and experience to see this 'weird' approaches that engineers had to go for.

 

[Zafer]

Working does not mean wotking well. I already had read about this when it first came out but I never thought it would be useful. Supercavitation requires speeds of in excess of 90 kmh which takes lots of energy to achieve. I have been looking at airfoils and Cl/Cd charts in the last few days coincidentally, albeit for airvehicles so, not out of my grasp.

 

[boredaf]

Working does not mean wotking well. I already had read about this when it first came out but I never thought it would be useful. Supercavitation requires speeds of in excess of 90 kmh which takes lots of energy to achieve. I have been looking at airfoils and Cl/Cd charts in the last few days coincidentally, albeit for airvehicles so, not out of my grasp.

And goalposts moved again, it shouldn't be this hard to admit you might be wrong.

 

[Anmdt]

Working does not mean wotking well. I already had read about this when it first came out but I never thought it would be useful. Supercavitation requires speeds of in excess of 90 kmh which takes lots of energy to achieve. I have been looking at airfoils and Cl/Cd charts in the last few days coincidentally, albeit for airvehicles so, not out of my grasp.

Hydrofoil boat concept is around since 1900s, as old as the modern screws.
Buoyancy driven high endurance propulsion is an invention of 21st century, it is not fancy but simple.

Prior one has been numerously experimented by Navies, possibly a thousand and more experts were straight dumbs that they haven't adhered by the design and scrapped it, and pretty much no military use. A few Ferry examples, possibly run by a crazy-tech savy operator.

Latter one has been adopted by navies since it was introduced and everyone is loving it; cheap, simple, nearly zero noise perfect intelligence gathering equipment, indispensable. And Darpa is 'experimenting' energy harnassing tools with Manta-Ray to extend endurance for UUV operations.

Hydrofoils require precise production, high strength materials (up to titanium depending on aspect ratios) high quality welding, and despite going fast, they need big engines to accelerate first, to catch up 'planning' speed. And they are not magically 'stabilized' as displacement or planning hulls, they need precise controllers for dynamic stabilization both to sustain trim and list angles, for water being 1000x as dense as air this requires hydraulic controllers. Even first moment which the craft transitions from displacement to hydrofoil mode is so critical that this vulnerability was the reason why this solution wasn't widely adopted.

And logic dictates - if you need to go fast, just take off and travel in the air, why need hydrofoils? Make a turbojet assisted UAV that can take off and detach the wet-parts, this makes a lot more sense or make a USV that fires turbojet missiles (oh yes, they did). Complexity of hydrofoils make them hard to operate, and illogical for kamikaze USV roles for the complexity and costs they include - just as supercavitation torpedoes you have just mentioned the idea is simple - go fast, water will evaporate, will create a bubble to glide in, wow instantly near zero drags, super fast speeds, it is no brainer right? But snap back to reality; it involves high end materials, valves, gas generators to sustain bubble, titanium rudders, 300 bar pressurized tanks, rocket motor to sustain, metal oxidizer high risk propellant and precise engineering for reducing the pressure and 'controlling' it just as enough to stabilize bubble without collapsing it. Yes it works, but few navies tried and said 'nah', like they did with hydrofoils.

You are the perfect example of dunning-kruger effect, and i am sorry, but i can't spent 30 minutes replying your messages written in 10 seconds without even thinking twice after doing 'few readings'. Neither that i claim that i am an expert of the matter, but despite the decent experience i have, i can't speak as sharp and clear as you do, and can't counter your arguments this blatantly. So feel free to make claims, but i won't be bothering to counter them.