I have a question. If you wish to put a piston engine with a jet engine on an aircraft, do you keep the same propeller or does the pitch and length of the propeller change for optimization?
Also, I've always felt that above 500 km/h a 3-4 blade propeller will perform better than a two blade prop. What do you think and why?
do you mean replacing a piston with a turbo prop? or having a combination of turbo and piston (never thought about that) The prop really depends on what you will use it for lets say you have a a 3 blade prop than that means that it will be pushing and displacing 3 smaller pulses of air at super sonic speed that is the reason why 3 blade props are used for to get the max speed out of the plane.
4 blade props would provide you with max power and thrust characteristics at lower speeds so you will be able to lift more a lot quicker but it will have a higher drag coefficient and will be less efficient
yes at higher speeds those performances of a 3-4 blade props will be significantly better than a 2 blade but then it also depends on what type of air craft you are flying because the slip will be a big factor. lets say you put a 4 blade MT Prop on a cessna 172 than you will have to use a lot of rudder trim to keep the darn thing flying straight.
Idk which plane you are flying at 500km/h with a 3-4 blade prop I know barons can do 470kmh with a nice tail wind so maybe you are talking about high-performance turbo props or bigger than GA.
but if you choose to fly at higher speed than probably you will utilize a variable pitch prop as they are much more easier and extensively used to keep the speed of the air craft at a constant selected speed.
Pitch is basically the distance of the prop (chord-line) that travels forward from AOI for every 1 rotation of the propeller.
to give you a little better answer I need more information. I was un-able to answer the first question because I am not clear about it but i can say this, Engines changes are tricky. you dont want to upgrade to an over powered heavier engine and always refer to the manufacturer guide if the guide says 90hp min to 120hp max than stick in that ball park dont put a 160-hp Engine as the mounts will not be able to handle it and the characteristics will alter drastically you will die.
I have a question. If you wish to put a piston engine with a jet engine on an aircraft, do you keep the same propeller or does the pitch and length of the propeller change for optimization?
Also, I've always felt that above 500 km/h a 3-4 blade propeller will perform better than a two blade prop. What do you think and why?
never seen a 2 blade go far beyond 300 km/h indicated and or actual WHAT IS THIS 2 BLADE YOU FLY I WANT TO BUY MUCH LESSER FUEL COSTS
