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Twisters

Twisters

 

 

 

 

Longtail engines are so designed to present the propeller at right angles to the transom giving the maximum thrust without the need for gearboxes etc. The longer the shaft, the closer the prop is to the perfect angle. However the perfect alignment is impossible to obtain using a straight shaft.

Using a tough multi-core steel flexible shaft, a Twister Kit's tail is half the length of a conventional longtail engine, and the prop is perfectly aligned at 90 degrees to the boat, giving more thrust and keeping the boat in perfect trim.

Trim is the angle of the motor in relation to the hull, as illustrated here using a conventional outboard.The ideal trim angle is the one in which the boat rides level, with most of the hull on the surface instead of plowing through the water. Wikipedia for more details

If the motor is trimmed out too far, the bow will ride too high in the water. With too little trim, the bow rides too low. The optimal trim setting will vary depending on many factors including speed, hull design, weight and balance, and conditions on the water (wind and waves). Many large outboards are equipped with power trim, an electric motor on the mounting bracket, with a switch at the helm that enables the operator to adjust the trim angle on the fly. In this case, the motor should be trimmed fully in to start, and trimmed out (with an eye on the tachometer) as the boat gains momentum, until it reaches the point just before ventilation begins or further trim adjustment results in RPM increase with no increase in speed. Motors not equipped with power trim are manually adjustable using a pin called a topper tilt lock.

The shorter shaft of a Twister-tail considerably reduces the torque produced when making a tight turn with a Longtail, making it much less likely to tip the boat sideways.

 

Twister 5-7hp

 

Twister 5-7hp

 

 

 

 

 

 

 

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