Specifications

The Tamiya connectors do not handle high current well. They will become very, very hot when

conducting large amounts of current. Unfortunately,these connectors are supplied with Corona

kits. It is highly recommended to replace these connectors.

JST connectors are only good up to about 6 amps burst, and should only be used for micro

helis under 400 grams. If used for larger helis such as a Zoom or T-rex, they will become very

hot.

Some people do use Powerpoles or Sermos with helis, but evidently some ESC manufacturers

are claiming these connectors have problems.

There has been a report of Schulze refusing to honor a controller warranty due to the usage of

Powerpole connectors.

Also, Rumrunner Hobbies' webpage states:

"Lehner/BK warrantee does NOT Warranty (and is not limited to):... If Sermos,

Powerpole, or Tamyia style connectors are used in the application."

Also mentioned:

"When connecting your new LMT controller to your batteries be sure to use

Deans style connectors or 4mm Gold connectors (gold connectors are for

racers only). Other connectors such as Sermos, Powerpole, and Tamiya con-

nectors can NOT be used and WILL VOID your warrantee.

These style connectors have a tendency to arch (sic) and or spark as your

vehicle is in motion. They also have a much higher resistance factor. If the

connector does arch (sic) during operation of your vehicle it will short out the

motherboard and render your controller useless!"

6.3.3. BEC (battery eliminator circuit)

(See Chapter 31, Glossary for a definition of BEC)

If your heli uses up to 8 cells and uses only analog servos, then you can use the BEC which is

included on many ESCs such as the Schulze Future 12.46k and the Castle Creations Phoenix

35.

Some controllers can handle up to 10 cells with four servos, but 10 cells is very marginal for

most linear BECs, and the BEC will run very hot. I recommend using an external switching

BEC when running battery packs over 10 volts (more than 8 cells NiCD/NIMH, or more than 2s

LiPo).

If you are using any digital servos, then you will need to check the ESC's onboard BEC amper-

age rating. Most ESC BECs are rated for only 1 or 1.5 amps which is insufficient to run a digital

servo + 3 analog servos. One digital servo with three regular servos can easily draw well over

one amp, so if your ESC's built-in BEC is rated for only one amp, you will definitely need to use

an external BEC. If you overload the ESC's BEC in flight, it will overheat and shut down. You

will then lose control of the helicopter and it will crash.

To use an external BEC, you will need either a free servo/battery position on your receiver or a

Y-lead for the BEC's output power plug.

Currently there are several popular BECs. The first is the Kool Flight Systems Ultimate BEC,

also called the UBEC. This is a large 20 gram BEC which can deliver 3 amps continuous.

Helicopter Parts Selection