Turbine NH-90
  On-line support Build-up / Page 17

Turbine Q&A/Addtional support products section here.

Corrections and Addendums here.

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The rotor brake is installed by hooking up and bleeding the caliper first, then you may have to remove main shaft to slip the brake rotor in place.
Take the upper bearing off, turn the unit upside down to get the center bearing out, remove c-clip inside hub and this should allow you to raise
the shaft up enough to get it under there. The trick? mount the caliper next, then compress the brake fully , then tighten and adjust the rotor hub
into place using the set screws with locktite. You may notice it runs slightly untrue, this is not a problem since it only turns a bit over 1000 rpm.

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Here is my cable junction which will get shrinked when everything is said and done, the other ends lead to my switches which I will over that install
very soon.


Bleeding the brake is done by removeing the two top screws, the lower cap screw on caliper and letting it gravity bleed the air out though
the caliper. Use a rag to soak up the oil as it spills out.replace the lower screw on caliper, refill and check the resivoir and bleed again till
all the bubbles in the line are gone.The brake is shown in the "open position" here.

Redundant swtich/heavy load harness:

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This is a special wiring harness from Graupner highly recommended for heavy large models with high servo loads and the need for extra protection
against wire shortage and switch failures. The first pic show just one switch for simplicity of explanation. Each harness has two in/out ports feed by
the 18 ga. battery wire. The servo leads are 22 ga. In the second pic, (one end shown with plug cut off) , we will solder the two batt. leads from the
two switches to one battery pack (or two if desired with battery failure switching device- not really needed as a pack fails slowly , not all at once in
most cases) we now have ultra heavy wires feeding the servos and receiver and four connection points of voltage and two switches. The heavy loads
are easily handled, even with 12 inch extension that will hook up(shown below) the turbine to the electronics bay.The ultimate in redundancy.

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Servo leads hooked up to swtich harness, the whole gang gets shrinked for security as seen here. Everything is now in place ready for turbine install.

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Before packing the batteries, make sure you pad them well. Here the main power plug from the battery to the switch harnesses.
This is a six pole plug, so i use three poles for each lead. This also gets shrinked for security(the black stuff you see in the gaps
is liquid electrical tape, available in hardware stores.)

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This is it ready for cockpit floor,note antenna lead runs away from servo leads and everything else, it loops around the nose
then up the middle windshield post, a cable tie secures up top under the cover. The 401 gyro within easy reach and also the
JR match box is shown here. Plenty of slack on the servo leads.
.

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  The mechanics all ready for final installation.


Cockpit is installed, I will detail when I paint the rest of the model.

 A few more pics and we are ready to fly!
 
 

 
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