Build log of the building of the Vario McDonnell-Douglas 900 Explorer
NOTAR tail rotor less helicopter in UK Air support livery
Page 29

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         A built Vario MD 900 kit (by Vario)                                  The real thing in UK Air Support Colours

November 24, 2009

Waiting for the faulty starter motor to be replaced, so decided to make a set of seat belts for the first pilot.

I also fitted the rear strengthening rods from the mechanics to the high pressure duct. In the right hand shot you can also see the rectangular exit hole for the tube that carries the power to the rudder servo. This will of course have to be sealed totally once the boom has been fitted and glues into position, as we need all the high pressure air as possible created by the huge fan mounted onto the motor main shaft to reach the NOTAR unit at the back.

Here is the mechanics tub with 
the mechanics sitting in it.  

The tub has now been painted 
to match the external blue

November 25-28, 2009

The Vario starter arrived back at Vario, and I heard yesterday that it is definitely faulty. A new starter motor is now on it's way over from Vario Germany, so it will be another week before I can return to the task of getting the Webra .91 started up and run in.

In the meantime I have been pressing on with creating lettering and Humberside Police decals etc.  I have also been final rubbing the paint down and even getting to the stage of starting the long process of waxing it to get that real final finish we all want on our helicopters.

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Here are two of the sheets of decals and lettering after the first coat of lacquer has been applied to them. They really need three coats for the best effect, although it does make them a little thicker.

Here is the first lettering applied to the fuselage.

The worst one is the Humberside police badge as all of this has to be produced on white backed paper because the yellow simply doesn't have the density to use clear backing paper. 

This means that the Police badge has to be very carefully cut out to create the white edging, and once that is done, it is pretty difficult to move or slide it around once it has been applied to the fuselage.

This is a "dry" application of the aircraft's registration to ensure the height and length are correct.

This is the original Humberside Police emblem picture that I am working from

I am also creating a full set of the standard signs all aircraft have "scattered" around them such as - No Step, Slide to Open, Turn to Open, AVTUR Fuel Only etc etc.  These will be applied where relevant a little later on.

I also have now taken delivery of the HeliCommand Rigid stabilisation system.  This is an expensive piece of electronics at £450+, but it is capable of handling the correct phasing of the rotor blades on the 5 blade head, and also acting as a full Auto Pilot, including maintaining position.

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The HeliCommand system in the aircraft is made up of two separate pieces, the actual main sensor, which you can just see buried behind the Deans plug in the picture opposite.

The second unit is the one with all the wires coming up out of it.  This sits between the sensor unit and the radio receiver you can see at the top right of the electronics tray.

To setup the HeliCommand Rigid requires the use of  your computer as well, so if you don't have a laptop, you are going to need to carry the helicopter to wherever your computer is in the house.

You need to purchase the special software (included in the £455 price) and then connect the HeliCommand sensor up to the serial lead provided with the software.  CAUTION - this lead has the old fashioned full sized serial plug on it, so you need to ensure your PC has one available, or else you will need a conversion lead as well.

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