I knew there would be
some work fitting my electric Align 700 in the Len Mount Dauphin fuse.
I discovered that I needed to drop the output shaft for the tail about
6 inches. I immediately thought of the drop down gearbox from Approach
engineering, but that takes a belt drive input, rather than a torque
tube. After hours searching for suitable 90 degree gearboxes to
make my own drop down assembly (gearboxes can be very expensive), I called Starwood to see if
they had any bright ideas... Dr Tim answered himself, and I
found him to be a super interesting and helpful guy.. I told him my
problem and he hit me with the bombshell: Just use existing tail
gearboxes! This was just TOO obvious! I had spent HOURS looking
for gearboxes online! Instead of using expensive 90 degree gearboxes,
use the manufacturer's own- inexpensive and off the shelf! I went out
and picked up the Align tailboxes, then we made a bracket to connect
them, and a long coupling shaft:
Attaching it to the mechanics was a
snap... It just required two of the shortest torque tubes in the
world. The mounting plate for the Dauphin we made is removable, with
locating pins for registration, and that made a handy place to brace
the drop-down against rotation.
At the tip of the torque
tube, you can see the adaptor to receive the dogbone from the tail
tube. This makes installation and removal of the mechanics a snap!
Above you can see the angled mounting
plate, intended to offset the heli's natural tilt (The angle can be
adjusted by swapping out the plate), and the drop down assembly is
mounted at an angle to correct for the offset of the mechanics.