EF Technologies Smoothie

The Smoothie timer, supplied by EF Technologies, is designed for electric power and rubber models. There are a variety of timers, each of which supports a selection of the following features:

• it only needs two button pushes to restart after d/t. It does not need to be powered off and on again before it will restart. As a consequence it may not be legal for F1Q because in my opinion it is too easy to restart after a flight.
• it has separate timers for power run and d/t
• both timers can be set from zero to 999 seconds in 1 second increments.
• the electric motor power can be set in 5% increments.
• timer setting and flight operation is via on-board buttons though the start button can be remote.
• it supports both brushed and brushless motors.
• small brushed motors that draw up to ten amps can be controlled directly by the timer.
• brushed motors the draw more than ten amps and brushless motors require an ESC to be used.
• it can use a servo or a hot wire for d/t.
• if a servo is used it can only be driven from one limit to the other, so it can not be used for VIT and AR.
• depending on the model, the timer weighs between 2.2 and 2.8 grams and can run off 1 to 3 Li ion batteries or a BEC equipped ESC.

There is also a d/t only version that would suit rubber models: it has just a d/t timer and hot-wire d/t.