JR Sylphide 50
Posted on Friday, June 20, 2003 @ 13:41:50 PDT
Topic: General News
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 JR officially released the Sylphide 50. the little brother of JR's flagship Sylphide 90. The Sylphide 50 features the same radical main frame design, where three pieces of machined alloy parts (One for upper part, one lower part with engine mount, and one part in the front to enclose the clutch) would encase the engine and drive train, and make the whole unit become a module by itself.
Gone are
the individual parts like engine mount, bearing blocks and cross members
as separate parts, which greatly reduce parts count and also makes the
module very strong. Six pieces of carbon frames would be mounted
onto the module as servo tray and additional tail boom support.
Under this design, all alignment problems on building stacked frames
were gone, and the massive module would take up all the stress from the
high output of the engine, and from stress during aerobatics. The
whole module is very strong, while light, and also this design makes
maintenance and repairs very simple. Power is transferred through
the engine to the main rotor by a main gear with slant gear mesh, while
a split gear also with slant gear mesh on top of the main gear would
transfer power to the tail by belt and also make the tail fully driven
during auto-rotation.
The rotor head of the Sylphide 50, interestingly, is a low flybar type rotor
head which looks very similar to the metal rotor head of Venture 50. Control is
through 120 degree 3 servo ECCPM. The Sylphide 50 is "pod and boom"
version, but an optional Gracy 50 fuselage (Hughes 500 look alike) is available
as option for 45,800yen (About £240-). Needless to say, the Sylphide 50 is design to fit the megabucks JR IMZ
50 engine at 44,800yen a pop (About £225-), but engine mount for the "less noble" OS 50 SXH
is also available. The Sylphide 50 is priced at 120,000yen (About
£610-), which is in league with a mid-range 91 class helicopter kit.
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Sylphide 50 main frame |
Gracy 50 fuselage |
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