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A built Vario MD 900 kit (by Vario)
The real thing in UK Air Support Colours
September 25, 2009
Well, Sunday dawned grey and overcast again with a stiff
breeze, so flying was out, so I decided to start the mechanics side
by going through the dry build stage of the mechanics (read frame
and gears etc)
Cut open the sealed parts bags and checked the contents
very carefully against the diagrams in the Vario
documentation. All seemed well, so I set about building the
(Sun and Planet) gearbox first. All went well, but you have to be
careful to get it all the correct way up. I know, because I went and
got it wrong the first attempt. 
I must say the parts are beautifully built, and go together
really sweetly. Even sliding the shiny main shaft down through
the three bearings was so silky but perfectly smooth and
tight. I guess this is what you pay for with such kits as
these from Vario.
Having got that bit done successfully (no grease or thread
lock etc being used right now, as it's a dry build) I moved on the
main frame assembly. This is where I eventually discovered
that I had indeed got the lower gearbox casing upside down - Tut,
Tut Ian.
I found to my surprise that some parts of the main frames
need to be cut off to give clearance for the planet wheel. I
suspect this is because it is a common frame for other models, but
the little diagram that tells you that you realty do need to do this
is less than obvious, and it was only when I realised that the
planet wheel was never going to be able to turn or even fit into the
aperture in the frame that I found out the reason.
Having cut those two small channel lugs off the frame and
files it down smooth again, it slipped together nice and easily,
although there is certainly another gotcha here, as you need to fit
the mainshaft and gearbox into one side of the frame BEFORE trying
to attach the side pates to the gearbox, or else you cannot get them
in later.
That was really the only drama I had, and by the end of the
afternoon, the frame was dry built, and I have even started
positioning the servos ready for drilling out the mounting screw
holes.
CLICK HERE for more pictures of the frame
dry build...
I also decided to add fit the skids to the fuselage so it
can stand around more safely without scratching the underside or
tilting over if knocked accidently. 
Looks a little nicer now on it's own two feet eh ?
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