Build a box with side walls and a flat bottom. The middle has a slot for a razor saw. Lay
your propeller in there and cut. Turn it around and cut again. The root side has to be
drilled to accept the screw on the DF35. All this has to be jigged, so they come out the
same, and the ends will need to be filed. It also needs to be balanced just like the main
rotor head, and I would mask/spray the tips on these blades so we can track them just
like the head. If you do track them, wear safety goggles and view from an angle.
145 mm
When you have a tail strike, you should pull the gearbox apart and hang the hex shaft
on 1 bearing only, since it will be bent. File the tips until it balances and reassemble the
whole thing. Note that you need to do this with your Master Airscrew homebrewed units
too. Do not exceed the original O.D. which is: 5.5” approx. I've found that when you pull
the holders out, the plastic binds on the bearing, so try pushing them in and let them
find their own place. Binding of the blade holders causes the whole tail to be
uncontrollable. If the pitch control moves very freely, you can bet the gyro will work better
and hovering
will be easier even with the original tail rod from the servo. Push & pull the servo rod to
make sure it's free and if not, keep mucking with the ”T” bearings/holders until you get it
nice. I got mine freed up today and the whole machine flies beautifully, the gyro works
CLEAN and needs much less sensitivity/gain settings. Which brings me to a “can of
worms” I'm sorry I opened...
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