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This is what I would call a German/Turkish coop design sub. It is based on the 214 class. But due to the instability of standard 214 during surfacing etc, it was redesigned with the help of Turkish design engineers and is around 3.35metres longer than standard 214 submarines. Most of it’s...

https://m5dergi.com/savunma-haberleri/pirireisin-liman-ve-deniz-kabul-testleri-basliyor-2/ The work to equip the first submarine of the six planned AIP subs, The PIRI REIS of the REIS class, has almost completed. It is going to start undergoing acceptance tests soon within this year. One of the...

Under 30kg weight, now even smaller size, and high definition image reception together with the capability to target moving enemy assets from above clouds with 360degree visibility, is a must for all our UAV‘s. In Karabakh, during cloud cover, TB2 fleet were grounded. With this it won’t need to...

https://www.c4defence.com/bulutlarin-uzerinde-operasyon-yapmak/ GMTI SAR - Ground Moving Target Indicator Synthetic Aperture Radar. Milsar, developed by Meteksan is a ground breaking piece of radar technology that will allow our UAV’s to operate above clouds without hindrance. Whether it is...

Nice video about the new indigenous CIWS. Good shot of the new 76mm gun too

I can’t believe that they still haven’t perfected single crystal blade technology. Apparently they are still in the development stage. According to some sources AL55 will have single crystal blades. Chinese have taken RD93 and produced WS13 with single crystal blades. They too are having...

AL-31F was designed to use single crystal blades for its turbines, but problems with implementing the process for production meant it was changed over to directionally solidified ones with improved cooling techniques in the early series engines. I expect at some point one of the later series...

AI-25 engine used in Albatros L-39 plane has a given life cycle of 4000hours. OK it is not really pushed hard. It powers a trainer aircraft. It has a never go above speed of 980km/hr. And a maximum top speed of 750km/hr. So it is well protected from sustained extreme uses. I wonder how this...

Exactly! That is what I meant. It may look like a “residual” amount of hot thrust not worth mentioning and even though “most“ of the thrust is coming from cold air thrust, you can not discard the thrust provided by the hot core. Zero hot portion thrust is never going to happen. Even in...

Nice view of a monster in the making from IDEF 2021

Ukraine uses super alloys in their blades. Russian Saturn AL31 engines were the same. They only started using single crystal blades in their “F” class engines , like AL31F and AL41F. Using single crystal does not solve all the problems though. The blade design has to be correct with the right...

Yes and No! Most of the thrust is produced by the fan. In a turbofan, the thrust it produces very much relies on the amount of air that by passes the engine core. Modern engines like the one used by the A320 neo, the Pratt and Whitney PW1000G has a by pass ratio of 10:1. That means, for every 1...

For a subsonic passenger liner with large fans and high bypass ratios, cold thrust created by the fan constitutes up to 75-85% of total thrust of the engine. For a low bypass turbofan fighter engine, capable of supersonic speeds, this could be as low as 30%. These values would change greatly...

Professor Aksit, is explaining the basics of gas turbine engines in it’s simplest form. As explained before the Turboshaft and turboprop engines convert jet propulsion to torque generation. (Hence HP ratings.) A gas turbine engine pulls air from outside and pushes (compresses) it in to...

TS1400 engine is a turbo shaft engine. It was produced as a replacement of Honeywell CTS800 Used in T-129. Unfortunately this engine has a radial flow compressor section. To produce a turbofan from this engine the compressor section and the turbine section will have to be redesigned with axial...

F404 has a number of variants. These are: F404-GE-102 : 17700lbf F404-GE-IN20 : 19000lbf F404-GE-RM12 : 18100lbf The rumour in the grapevine at one point was that, a 19000lbf level engine was to be used on Hurjet. But it is now becoming more likely that the 17700lbf engine will be...

You can not have HP for a turbofan or turbojet. But you can have lbf or KN thrust. Like tj300. (Turbojet 300lbf thrust) Physics dictates that a turboshaft and Turboprop engine‘s output can be quantified in “shaft horsepower“. But a turbojet and turbofan engine’s output can only be quantified in...

It has a lot to do with airframe design. But; Taking TEI’s way of naming it’s products, TF6000 relates to an engine that has 6000lbf thrust. If that is dry thrust, then we are looking at an engine with 9-10000lbf thrust with afterburners. Czech Albatros L-39 has a 3800lbf AI-25 turbofan engine...

That is where imagination comes in to play! 😀

First part I can agree with you. We all have imaginations! Second part is a pedantic response. Designers of aircrafts have found that certain surface shapes will not send back signals back to the radar sending them. So what makes a shape, free from radar signals being returned? This is where we...