Tuossa juttua vielä F-15 SE:stä.
Improving the fourth generation fighter’s profile on air-to-air radar is Boeing’s key goal for the F-15SE, which the company plans to offer to five foreign countries with an estimated market for 190 orders.
Radar absorbent materials added to leading edges are designed to soften the F-15SE’s head-on radar signature. Canting both vertical stabilizers by 15° is intended to reduce radar returns to the side.
Finally, embedding missiles and bombs inside conformal fuel tanks also reduces radar signature in all directions, and allows the F-15SE to perform its warfighting mission even with “clean” wings.
Boeing claims the end-result is an aircraft that can match the frontal-aspect stealth profile of any fifth generation fighter in configurations cleared by the US government for export release.
“We know we can get to the US government release level for international customers,” says Brad Jones, Boeing’s manager for future F-15 programmes.
To be fair, Boeing acknowledges the F-15SE’s stealth improvements do not help against ground-based radar systems, which are critical for waging offensive strikes against opponents armed with surface to air missile systems. Lowering the F-15SE’s thermal signature - a critical stealthy feature for the Lockheed Martin F-22 - is also not part of Boeing plans.
But Boeing says the F-15SE is aimed at international customers more likely to use the aircraft for defensive, counter-air missions, rather than offensive strikes in defended airspace where all-aspect stealth is necessary for survival.
Despite the stealth improvements, Boeing insists the F-15SE would not tradeoff sensor or aerodynamic performance. The Raytheon APG-63(V)3 radar would remain canted slightly forward rather than tilted back, preserving coverage and range at the expense of head-on radar cross section.
Moreover, Boeing has designed the F-15SE to also function as a non-stealthy, multi-role aircraft with the F-15E’s full payload of 13,200kg (29,000lb) of weapons. The conformal fuel tanks with the internal weapons bay can be quickly removed after landing, allowing the aircraft to takeoff with a full payload within 2h.
Another key feature of the F-15SE is the electronic warfare system. Boeing has selected the BAE Systems digital electronic warfare system (DEWS), which includes a digital radar warning receiver, digital jamming transmitter, integrated countermeasures dispenser and an interference cancellation system. The aircraft could continue to jam enemy radars even as its own radar and RWR continues to operate, Boeing claims.
Boeing launched the F-15SE, initially dubbed "Project Monty", last September. The company-owned F-15E testbed was quickly modified with the V-tail and conformal fuel tanks to provide a ground-based demonstrator.
Flight trials for a risk reduction programme are scheduled to begin in the first quarter of 2010. The first aircraft could be available for delivery to foreign customers three years after a deal is signed. Boeing plans to offer the F-15SE to Israel, Japan, Singapore, Saudi Arabia and South Korea, with all being current F-15 customers.
Notionally, Boeing estimates the F-15SE’s cost, including airframe, spares and training, at $100 million each.
The F-15’s single-largest customer – the US Air Force – is not officially a sales target for the F-15SE. However, Boeing says that all of the stealth, avionics and structural upgrades can be retrofitted on any existing F-15E. Company officials have briefed three agencies within the US Air Force, including Air Combat Command, but only as a “courtesy”, the company says.
http://www.flightglobal.com/articles/2009/03/17/323962/pictures-boeing-unveils-upgraded-f-15-silent-eagle-with-fifth-generation.html
Aj 77: En saanut mistään dataa koneen lasku- ja nousukiitomatkoista tai huoltotarpeesta, mutta senverran sain tietää että Pratt & Whitney F 100-sarjan moottorit on toimineet koneissa jo yli 20 milj. lentotuntia erinomaisesti. Uusimmillakin F 100 PW 229 moottoreilla on yli miljoona käyttötuntia takana, eikä yhtään konetta ole ikinä menetetty moottorihäiriön takia. Kyseessä on tiettävästi luotettavuusennätys suihkukoneissa.
Hävittäjän suunnittelussa on otettu huomioon paras selviytymiskyky sijoittamalla koko sisäinen polttoaine moottoreiden etupuolelle. Poltto-ainesäiliöt on vuorattu erikoismateriaalilla joka estää kerosiinin höyrystymisen tulipalossa. Edes suora sirpaleen tai ammuksen osuma ei sytytä poltto-ainetta. Lisäksi säiliöt on itsetiivistyviä.
F-15 koneita käytetään jatkuvasti NORADin alaisuudessa Alaskan rajuissa olosuhteissa ilmapuolustuksen etulinjassa. Koneethan on olleet USA:n ykkösilmapuolustus koneita jo 1970-luvulta asti. Eiköhän ne suomenkin kentillä ja maanteillä tulisi toimeen.
Löysin erittäin hyvän tietosivuston F-15 E -koneista, kannattaa käydä tutustumassa jos kiinnostaa:
http://www.f-15e.info/joomla/