Turbine NH-90
On-line support Build-up / Page 8
Turbine Q&A/Addtional support products section here.
Corrections and Addendums here.
...
TThe IGB end of the tube assembly
has the inner sunk in 1 mm from the end. It is then thin CA glued into
place... Just let
the CA run between the tubes while rotating and
soak up the excess on the other end with paper towel as it drips out.
Take care not pour CA down the middle sleeve
liner... just take it slow. All done and ready to install in IGB only after
the
drive shaft has been cut to 842 mm ( I left mine
a few mm long and checked it twice...then trimmed it)
...
We then make a gradual even bend with a
10 mm on one end. Here is the lug you have to remove on the IGB in order
for
it fit properly.
...
AAfter checking I trimmed and excess shaft...
I also used 603 on the shaft when it was installed after i was sure of
length
being just right and having the bulkhead for
IGB tacked into place in good alingment with the tail. In short you can
always
cut more off if need be, but its hard to put
it back. Measure twice, cut once. Now sand the area under the fin for the
IGB
bulkhead.
...
I check alingment before adding screws
using a pencil mark, then I drill for the 2.9 mm screws. When tacked into
place
the short driveshaft should exit centrally. Later
I also add 3mm blind nuts and bolts in place of the 2.9 mm screws
for the
tailbox mounting part number 728.3 (3 mm blind
nuts). After I trim everything, this bulkhead will get some light glass
cloth
and thin CA to finish the bonding (both sides).
...
ttThe tailbox is fitted and the distance
measured is cut off the shaft plus 1mm, from the mounting flange on box
to the bnulkhead surface. When all is fitted
on the IGB, we also glass cloth the bond both sides, then re-install
later.
...
Here is where I deviate a bit. I chose
to use the u-blocks for wooden channel inverted just kissing the shaft
in the installed
position, this gives me hard bottom, but wide
enough to slide the couple through upon disassembly. I then bolt on the
intended
brackets both sides to lock the shaft in place...grat
care must be taken not to push the shaft out of line when installing these
parts.
You can also just the blocks as they were
meant using two criss-cross zip ties to secure it. This takes a little
longer to remove,
but what the hey? It all takes time!
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