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Oct 24, 2006, 01:34 AM
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Corona 120 survival notes


Got reasonably stable nose-out hovering and smooth landings in 3 hours
of flights and a few crashes. Training gear came off by the 2nd hour. The worst damage due to crashes was loss of blade tracking and shredding of the main gear, both of which were still flyable.

Only simulator experience was FMS and it was nothing like the real
thing. Completely worthless.

Main gear was shredded in a crash but with an xacto enough of the main
gear shredding could be removed to fly it again. A pinion/main gear gap
of 1 newspaper thickness is optimum.

Do not spray CA accelerator near any plastic parts. $30 reorder for
that one. Do not spray engine degreaser either.

The Corona canopy is ugly, is a pain to get a battery into, and prevents
you from seeing if something is about to break lose, so the canopy is
gone. Replacing it with a semicircle of white plastic is worthless
too. The raw anodized aluminum is as visible as anything else.

Metal gears are required in the servos and they should be purchased with
the servos as part # HS-81-MG to save money. Nylon gears in a copter
are like marines in Iraq.

The crystal must be soldered into the GWS receiver to make it reliable
enough. The stock crystal socket is not secure enough.

The Hyperion 11.1V 3300mAh 20C is a monster of a battery. 15 minutes of
flying and it's still cold. Attach this battery by threadlocking 1.5" 4-40
bolts into the bottom of the crutch, strapping it in with a ny-tie, and
using masking tape to keep it from sliding forwards and backwards. The
bolts are wrapped in electrical tape.

The manual says "Do not install female terminals on your battery" but
using male terminals on the battery has proved very dangerous. Leave
near any metal objects and you're dead. Ignore the manual and install
female terminals on the battery.

Wrap 3/4" foam around the tail boom, not 3/8" you wimpy Americans. The
idea is to dissipate rotor impacts across the most surface area.
Impacts with the rotor are a fact of life.

Optimum antenna placement is on the skid facing away from the servos.
Place the transmitter antenna on the receiver antenna and at a right
angle when arming the speed controller for the least unintended
amputations.

Install pins in the tail rotor with a 16oz hammer and a 1/16" pin punch available at OSH. Do not use the pin punch to defrost refrigerators.

The Corona's rotor blade proudly spins counter clockwise when viewed
from above while every other copter's blade spins clockwise. This is
because The Corona was made in U know where.
Last edited by Jack Crossfire; Oct 24, 2006 at 02:42 AM.
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