technically they are .... they are just 4 stroke engines after all ... suck press burn blow ... the hard part is the math within very small tolerances to make them work efficiently ... just a single stage axial compressor needs 100 hours of math work for design to get it done .... each blade on the rotor needs a changing airfoil design for optimum airflow in its area of flow ... for EACH blade on the rotor ... and each of those blades need a specific angle on them that directs air to the stator which again needs more changing airfoil designs from root to tip to manage the rotors compressed air and of course the tunnel in which the compressor operates also needs to be profiled to cover the engines operating area ... and that is JUST one stage of the compressor .... modern jet engines use 10 of them ... and each one of them is vastly different from the ones around it ... and now dont forget with compression comes heating ... so metal temperature now is also a concern ... and of course the turbine section has to be able to handle the heat from the combustor without melting so it can keep the compressor spinning at speed so it can compress the air and mix fuel to send it to the combustor to be burnt ... where you have to take the high speed air flow and mix it with fuel and slow it down enough to keep the flame in a small area away from the sides (so you dont melt the case) and get it from the combustor to the turbine ... and on out the engine ... so that material science ... fluid dynamics ... cad engineering ... aerodynamic engineering ... electronics engineering ... and of course thermal engineering ... just to make an engine ... each engineer hour worth a few hundred bucks each ... and each part of the math needed for each section is 4foot or more longer and have to be done up to 20 times for ONE pass through the engine in a unit of time ... and then done again for the next unit of time .... in the end the line of equations is about 4 miles long ... for one engine and you run it 20 times ... thats 80 miles of math at a few hundred bucks per person ... . the hard part isnt making the engine the hard part is the amount of knowledge one needs to design it and put to work for several hundred thouand hours of work even before you can actually BUILD the first engine ... a mdoern car engine ... hasnt changed since Daimler made his car engine ... heck we havent even surpassed FORDS fuel values from when he made the first production line ... and thats well over 100 yeas ago ... and the tolerances of those engines are still the same ... sloppy like an ak47 ... while a jet engine has them in the 1/1,000,000th in ALL places ...
That's true, imagine the cost of fuel alone XD These engines are simple but due to having single compressor and turbine it's really limited in thrust unless you spin it up to really dangerous speeds also lack of turbine stages means low efficiency
This is the great work my friend, can you suggest me how can i make it even small, or if you tell me where can i purchase them. i am planing to design one robot using them.
Are these turbine engines not subjected to the high temperatures of full size radial turbines. if they are subject to high temperatures, how does aluminium cope with the high temperatures. I did not hear the presenter discuss titanium parts in this turbine.
Titanium is only good for low temperature stuff Hot side (turbine stator vanes) are made out of inconel as it doesn't lose strength when heated and it doesn't shrink and expand and can take up to 800°C Aluminum compressor is standard centrifugal single stage and will only see temperature as high as 150°C
Ikr! But that’s just the way they design em, if you want 2-3 stage then you have to either design and manufacture it yourself or maybe there’s a few on the internet
This engine just like the first air - compressor of Sir Frank Whittle / Brittain ... But the real turbine engine was the powered German Messerschmidt Me-262 Schwalbe airplane ... !"! ....
Dante hollow if you are skilled in crafting you can build your own... The only parts you need to buy are of course the materials etc but you cant build the turbines on your own without costly precision tools. So you need to buy them
looks no close to real jet engine.....still hell expansive, also the parts that goes inside doesnt seems to be madeup of expansive stuff...why the hell they charge so high for this... if they think its because of low demand? man the low demand is because of its high price.... drive the price down and you will see the demand moving up high.... im sure that its the high price only which keeps many many aeromodellers out of this turbine thing....and i agree the model piston engines are also complicated stuff..but still under affordability.
