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The Electric VioFan is a drop-in
replacement for the piston powered Viojett, so converting these
models to EVF power is relatively simple.
The best candidates for the
conversion are the F-86 Sabre, F-16, Maverick (and Pro version),
Aggressor III, and the Ultra Viper because the space available and
access to the batteries is adequate. The very early Viper and
Aggressor I's and II's have limited space and access but can accept
some battery configurations.
Please keep in mind that the EVF
power exceeds that of the DF Viojett. Therefore, the structural
integrity of the very early designs combined with aging glue joints
must be a consideration in your decision to convert.
This information is not intended
to be a thorough step-by-step instruction manual on each conversion
but rather a few guidelines on how to accomplish. Experienced
modelers can handle it.
Since the model you are
considering for the conversion may be new in the box partially
built, or one that has been completed and flown with D/F power, the
following guide lines must be applied accordingly.
These guide lines will assume
that the
model has been built and flown.
• Remove the Viojett, Tuned
pipe, fuel tanks, and plumbing.
• Remove the F/G Tailpipe
with pipe hanger.
• Remove the throttle and
mixture control servos and linkages and their mounts.
• Thoroughly clean any fuel
reside from the inside of the fuse and check all glue joints for
security.
• The original non-"Hush
kit" treated inlets do not require any modification. If the
model has the "Hush kit" canisters, it is best to remove the inlets
and install fresh ones. BVM can provide these parts.
Note: It is likely that the epoxy paste
seals on the Hush kit canisters no longer provide a perfect seal.
An air leak in the canisters will severely interrupt the inlet flow
and cause a noticeable loss of thrust.
• Acquire the appropriate
Mylar Thrust Tube for your particular model.
• Install the EVF unit per
original mounting system.
• Install the thrust tube
per its instructions.
• Read EVF instructions.
• See many posts on this
site for more Hints + Tips on successful EVF operations.
• Install the batteries.
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