By the end of August 2012, Ukraine plans to finalize testing of the three-shaft propfan
EasyJet plane solution and it is no secret that their plane proposal shares many of the characteristics of the US propfan
efforts in the late eighties and early nineties.
Thus was invented the propfan
, an "ultra-high" bypass engine that is a throwback in two ways.
Green sky thinking - carbon credits and the propfan
It first flew in 1994, but its advanced propfan
propulsion system has proved difficult to develop.
There is an argument in favour of the Russian Air Force having both the IRTA and the much larger Tu-330 (or the Ukraine's propfan
An-70), but for the time being that service may have to settle for one or the other.
In combination with ducted propfans
and a swept wing, this was thought to provide potential for speeds up to 740 km/hr.
TABLE 53 (CONTINUED) CLEAN AIRCRAFT PROPULSION SYSTEMS TECHNOLOGIES Propfans
Diesels DEVELOPERS AND SUPPLIERS
The sole direct competitor for the A400M is the 145-tonne Antonov An-70, which is powered by 10,350-kW Progress D-27 engines turning 14-blade contra-rotating propfans
Older physically thanthe A400M, having first flown in 1994, but arguably more advanced technologically, having propfans
rather than turboprops, the Antonov An-70 is a long-running on-again, off-again saga that might (if launched earlier) have become one of the aerospace success stories of the Soviet Union.
The An-70 is powered by four 10,300-kW Ivchenko-Progress D-27 engines (25% more powerful than the TP400), turning 14-blade (eight at front, six at rear) contra-rotating SV-27 propfans
The A-42 could be a development of the 86-tonne A-40 of 1986, since the company website refers to a 96-tonne Be-42PE with Progress D-27A propfans
replacing the A-40's Soloviev D-30KPV turbofans.