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Vigor CS or Robbe Millenium?
Simon Lockington
(continued from previous page)
As I've not seen both machines in the flesh, I am basing my opinions on them
from the photo's provided to me. After studying each model, I've come to the
conclusion that both machines are equally well engineered.
Control Systems:
Both machines use a form of CCPM. Below are some pictures of the main control
systems of each machine.
Robbe Millenium Mechanical CCPM
The Millie uses a 45degree offset swashplate actuated by a 'swinging
servo' mechanism.
Ken Kammerer, had this to say about the Millenium's implementation
of Mechanical CCPM.
"The two front servos rock, the one closest to the start shaft
is the collective servo and is fixed. This is really hard to explain
in text, but I will try.
The swash plate is turned 45 degrees, so all it's bell cranks sit
outside the frames (very nice- there is nothing sitting between the
frames making it hard to get to). You'd think turning the swash would
throw off the timing, but it doesn't because the linkages to the head
still connect to the same places. If you think about it for a while,
it makes sense that it works. The aileron servo (frontmost servo)
is connected through the bell cranks to the right front and left rear
points on the swash, and the elevator is connected to the left front
and right rear points on the swash. The collective servo rocks the
elevator servo, and since it connects to two points 90 degrees apart
on the swash, it causes the whole swash to go up and down. This in
turn causes the aileron servo to rock, even though the aileron and
elevator servos are not linked directly together! For aileron and
elevator control, the respective servos tilt the swash plate as required,
and the fact that the linkages are in a closed loop provides push-pull
control."
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 JR Vigor CS CCPM
The
CS utilises 140 degree CCPM mixed electronically at the radio. Currently,
the other radio to offer 140 degree CCPM is the JR PCM10x. The CS
can also be configured with 120 degree CCPM so that non-PCM10x users
can fly the CS.
You can see from these pictures the superb engineering of the CS's
swashplate assembly and the simplicity of the linkages and bellcranks.
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 Comments
I've heard about the JR CCPM implementation are that it's one of the
best CCPM implementations there are and that the Vigor CS feels more
'locked in' from a control aspect than standard Vigor which as standard
mechanical mixing.
Ron Lund has a lot of good information on his website that he compiled
when building his CS, click
here.
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Frame Assembly:
The Vigor CS comes straight out of the box with single piece carbon fibre frames,
the Millie has stacked aluminium frames. There seems to be a number of schools
of thought of the benefits of single piece vs stacked frames, and aluminium
vs carbon fibre.
After studying the photos of the way both machines mount their engines, I have
to say that the CS looks like it would be easier to work on. The Millie appears
to hide it's engine behind the fan shroud.
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Millenium Engine Mountings
As you can see, the Millie's engine is hidden away in behind the fan shroud.
Could make maintenance a little more trickier than the CS. |
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JR Vigor CS Engine Mountings
The CS's engine is out there for all to see with easy visibility and access
to most parts. |
Page Three
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