Specifications

7.3.3. CA debonder

CA debonder is usually acetone with a jelling agent so it will cling to surfaces.

Some types of fingernail polish remover contain acetone, and sometimes a fluid works better

because you can soak the entire part in acetone.

CA debonder usually does not work instantly, and requires at least a few minutes to weaken

the CA sufficiently to allow the parts to be separated.

7.3.4. Epoxy

Two-part epoxies are often useful for making repairs.

There are many different types of expoxies, with many different curing times. As a general rule,

the fastest setting epoxies are the weakest, and the slowest setting epoxies are the strongest.

For example, J-B Weld requires 4-6 hours to set and is one of the strongest epoxies.

You should avoid creating bubbles in the epoxy when mixing the resin and the hardener, be-

cause the bubbles will weaken the epoxy significantly. A stirring motion to mix the epoxy is

very bad because it tends to produce bubbles. A smoothing motion (similar to the motion used

to level cement with a trowel) works much better.

7.4. Charging equipment

7.4.1. Battery chargers

See also Section 30.9, “Battery care and maintenance” for important information about batter-

ies.

There are many nice chargers on the market.

Here are the features I recommend you look for:

• For micros: able to charge at 500 ma - 1.5 amps

• For nonmicros: Able to charge at 3.5 to 5 amps

• Delta-peak charge termination (for NiCad/NiMH)

• Some type of false peak rejection capability (Sometimes called soft-start, peak delay, etc.)

(for NiCad/NiMH)

The soft-start/false peak rejection capability is especially important for Nicad and NiMH char-

ging. Helicopters tend to discharge cells rather deeply, and when these cells are charged, the

charger may often "false peak detect". This occurs because the cell chemistry is unstable

when deeply discharged and the cell voltage will fluctuate randomly until the cell chemistry sta-

bilizes.

A charger with soft-start or false peak rejection will not require restarting the charging cycle

multiple times in the first 5-10 minutes of charging a deeply discharged battery pack.

The chargers which are known to fit these criteria are:

• Maha MH-C777 Plus II (surface charge, Nicad, NiMH, Li-ion)

• Great Planes Triton (peak delay, NiCad, NiMH, Li-ion, Pb)

Support Equipment