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Kits: Belt Driven vs. Shaft Driven

Old 09-05-2011, 07:00 PM
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crazytom911
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Default Kits: Belt Driven vs. Shaft Driven

Hey im still trying to learn, and possibly build a heli. what is the biggest differences comparing the belt driven tail rotors to a shaft driven?? Just wondering what the pros and cons of both would be. thank you

Old 09-06-2011, 05:40 AM
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Rafael23cc
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Default RE: Kits: Belt Driven vs. Shaft Driven


ORIGINAL: crazytom911

Hey im still trying to learn, ...............
For learning, the best is the belt. With a shaft driven tail, sometimes the minimum interation of the tail rotor and the ground will result in broken parts. With a belt, the belt will slip and the helicopter could be flown with no problems.

Some people claim that a shaft driven helicopter is more efficient and what not. A newbie or a sunday flyer will never notice the difference.

Rafael
Old 09-06-2011, 06:28 AM
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BarracudaHockey
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Default RE: Kits: Belt Driven vs. Shaft Driven

Exactly.

The torque tube has more efficent power transfer and a few more RPM at the end of an auto, but in flight its hard to tell the difference.

Belt is definately more forgiving for a beginner.
Old 09-06-2011, 03:56 PM
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rotor09
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Default RE: Kits: Belt Driven vs. Shaft Driven

Generally a belt will be more forgiving to a hard landing, where the tail rotor makes contact with the ground then would a shaft drive, and a belt may also be more forgiving in a crash that bends the tail boom substantially. But there are many different types of belt drives as there are different types of shaft drives.

So in some crashes you will find a belt drive system such as found in a Shuttle will have a more risk of belt or other parts damage then would that a design such as found in the Align, JR or Century belt driven systems. The belt drive system with all the speed reduction happening at the back, instead of the front will also take more power from the engine to drive when under power and more from teh rotor when in an auto.

There are also many different shaft drive systems, some like the one in the Century helis, that feature two universal joint/dog-bone type of couplers at the front and at the back of the shaft, will take bent boom crashes much better then would the shaft drive systems that do not have this type of system.

In all current designs, the shaft drive system will do take less power to drive so are more efficient then even the best belt drive design with the belt set to its most efficient tightness.

This is why a 30/550 sized torque-tube driven heli can auto so well compared to its belt driven competitors and will also seem to have a better power to weight ratio.

Old 01-06-2012, 11:44 PM
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JunoWelson
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Default RE: Kits: Belt Driven vs. Shaft Driven

Really learnt a million, first-hand experience
Old 01-09-2012, 03:11 AM
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lenachen
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Default RE: Kits: Belt Driven vs. Shaft Driven

Thank you for sharing. Then I will take the belt.
Old 01-09-2012, 07:59 AM
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Default RE: Kits: Belt Driven vs. Shaft Driven

A belt drive offers better digestion, while a shaft drive lacksthatfeeling of self-doubt.
Old 01-10-2012, 12:24 AM
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Henriquedeton
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Default RE: Kits: Belt Driven vs. Shaft Driven

flying belt-driven heli,want to try the torque tube one pronto

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