Malo novosti.....
Ka-52K bice izlozen na MAKS-2015,ali nece skoro u upotrebu.
Созданный под "Мистрали" вертолет Ка-52К впервые будет представлен на МАКС-2015 http://www.aex.ru/news/2015/8/6/138875/
Russian Navy Naval Aviation to Receive its First Ka-52K Ship-Borne Helicopter by 2018 Citat:The Russian Navy expects to receive the first Kamov Ka-52K (Katran) ship-borne helicopters in 2017-2018, a high-placed source in the Navy’s Main Headquarters told russian state news agency TASS on Thursday.
The helicopters were earlier intended to be based on two Mistral class LHD, which France has refused to deliver to Russia over Moscow's stance on developments in neighboring Ukraine.
"I believe the naval aviation will get these helicopters by 2017-2018. The helicopter component on Russian warships will be quite serious. The number of helicopters has yet to be determined but a final decision has not yet been made. But there is the understanding that they will be received and operated and we’ll see what to do further," the source said.
http://www.navyrecognition.com/index.php?option=co.....mp;id=2968
Kad smo vec pominjali `koaksijalce` i tehnologiju izrade
Citat:Coaxial rotor systems have been around for a while and are used on the Russian Kamov KA50 as well as other types from the same company. The KA50 has 2 stacked coaxial rotor systems turning in opposite directions. This provides the increased lift of 2 rotor systems without taking up a lot of space like a tandem system.
The main advantage of opposing rotation is that the aircraft no longer needs an antitorque system. One of Newton's laws of motion states that for every action there is an equal and opposite reaction. This means that, if the rotor system on a conventional helicopter turns to the right, the fuselage wants to turn to the left.
To combat this tendency, conventional helicopters are equipped with tail rotors to keep the fuselage straight in all phases of flight. On the KA50 the rotors are fully articulating and they lead, lag and flap, which means they are moving around a lot and must be spaced well apart from each other—thus the very tall mast and long push/pull tubes, which increase drag.
Unfortunately, the coaxial rotor system on the Kamov still experiences retreating blade stall, and so doesn't completely solve helicopter high-speed regime issues.
i ovo vezano za onaj slucaj pogibije pilota zbog dodira lopatica oba rotora
Citat:Collision of coaxial helicopter rotors is no more probable than collision of single rotor blades with tail boom. Safe distance between rotors is determined on basis of special methods, calculations, researches and flight tests. At rotor starting and stopping in stormy conditions, rotor collision is prevented by centrifugal flap stops at lower rotor and droop stops at upper rotor. Safety of coaxial rotor scheme is proved by abundant operation experience of Kamov helicopters. KAMOV Company has been designing and manufacturing coaxial helicopter for more than 50 years and has practically polished to perfection the rotor system design.
Na ovoj slici se jasno vidi koliko zapravo posada ima prostora u slucaju izbacivanja iz kabine tj katapultiranja i da tu nema nikakvih prepreka u vidu nekih pregrada okvira vrata ili prozora ili slicno kao u slucaju Mi-28N .Kod njega je to zaista rizicno usko ... hm trebale bi dobro prepravke ako bi se islo na ugradnu K-37M-800
Hebi ga. Niko da mi odgovori na pitanje 5 dana. Da li koaksijalni rotor Kamova 52 ima prednost u odnosu na klasičan sistem prilikom otkaza motora? Odnosno, da li bi u idelanim uslovima (zamislimo identičnu aerodinamiku, masu helikoptera i površinu lopatica) Ka-52 mogao bezbedno da se spusti sa manjih visina u odnosu npr. Mi-familiju? Poenta pitanja je da helikopteri u borbenim misijama lete izrazito nisko i da je najbolje sačuvati i posadu i helikopter. Uopšte me ne zanimaju katapult sedišta, samo sletanje primenom autorotacije.
Takođe, da li bi povećanjem broja lopatica bila smanjena brzina propadanja prilikom otkaza motora?
Hvala, onome ko mi odgovori. Jbg, nisam pilot, ali me zanima.
Trazio si kolega odgovor od iskusnih pilota ali takvih ocigledno nema na forumu ( za sad ) ... Nego pogledaj na ovoj stranici ima link za sajt o `koaksijalcima` i u njemu opisane prednosti i mane pa se nesto mozda na osnovu toga moze zakljuciti ako neko predhodno ne da pouzdaniji odgovor ..
