tech question whitch is most efficent belt or gear and why

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aggiejim
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tech question whitch is most efficent belt or gear and why

Post by aggiejim »

having a difference of opinion with a buddy there is a power loss with any reduction threw drag, heat, friction what is the most efficient belt or gear assume both are working correctely.
16 x 8 floral city ls2 6.0 aluminun block 2.3 ch3
can u say addicted
16.5 x8 alumintech new build
6.0 ls2 2.3 ch3 3 blade
the aggie

Bdriller
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Re: tech question whitch is most efficent belt or gear and w

Post by Bdriller »

Im gonna guess belt would be 28-32% loss verse 8-12% on gear, i have nothing to base this on , never seen any published info, would be nice to see some data on this subject,

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AntiqueFarmEquipment
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Re: tech question whitch is most efficent belt or gear and w

Post by AntiqueFarmEquipment »

As I understand it belts are between 95-98 percent efficient depending on a variety of factors such as whether they are v-belt or synchronous, tension, alignment, ect

Gears return a little less maybe 92-93 due to gear lash and additional frictional forces. Also spinning in an oil bath doesn't help either.

Just my two cents

Pretty close regardless
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Re: tech question whitch is most efficent belt or gear and w

Post by aggiejim »

this is why I have started this someone hast to know and can put it in type
16 x 8 floral city ls2 6.0 aluminun block 2.3 ch3
can u say addicted
16.5 x8 alumintech new build
6.0 ls2 2.3 ch3 3 blade
the aggie

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Re: tech question whitch is most efficent belt or gear and w

Post by jeepinocala1111 »

The problem you have is what type of gear and what type of belt? Belt drives are better then chain drives.

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Re: tech question whitch is most efficent belt or gear and w

Post by aggiejim »

re read the question Belt or Gear never seen a chain reduction unit on a airboat would it work yes not condusive to elements though, it would be a mess strech o yea would haft to be in a oil bath lets stick to the subject
16 x 8 floral city ls2 6.0 aluminun block 2.3 ch3
can u say addicted
16.5 x8 alumintech new build
6.0 ls2 2.3 ch3 3 blade
the aggie

WaterWalker
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Re: tech question whitch is most efficent belt or gear and w

Post by WaterWalker »

The Gates Rubber Company's Design Manual for the Carbon Corded 'Poly Chain G-2' line of belts on page 102 lists the following description of their efficiency.

Copied and pasted from that manual is as follows;

6. Efficiency

When properly designed and applied, PolyChain® GT® Carbon® belt drive
efficiency will be as high as 98%. This high efficiency is primarily due to
the positive, no slip characteristic of synchronous belts. Since the belt has
a thin profile, it flexes easily, thus resulting in low hysteresis losses as evidenced
by low heat buildup in the belt.

Gates synchronous belts are uniquely constructed because they use high
performance materials. Optimization of these high-technology features
provide maximum performance and efficiency.

When examining the loss of energy, it is necessary to consider belt losses
in terms of shaft torque and shaft speed. Torque losses result from bending
stress and friction. Chain drives running unlubricated may generate
significant heat build up due to increased friction in the roller joints. Even
properly lubricated chains running at higher speeds tend to throw off the
oil due to centrifugal forces, making it difficult to maintain proper lubrication
at the load bearing surfaces. Consequently, chain drives are typically
only 92-98% efficient.

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Re: tech question whitch is most efficent belt or gear and w

Post by aggiejim »

out standing now how about gear box efficency (my spelling sux)
16 x 8 floral city ls2 6.0 aluminun block 2.3 ch3
can u say addicted
16.5 x8 alumintech new build
6.0 ls2 2.3 ch3 3 blade
the aggie

aggiejim
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Re: tech question whitch is most efficent belt or gear and w

Post by aggiejim »

out standing now how about gear box efficency (my spelling sux)
16 x 8 floral city ls2 6.0 aluminun block 2.3 ch3
can u say addicted
16.5 x8 alumintech new build
6.0 ls2 2.3 ch3 3 blade
the aggie

aggiejim
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Re: tech question whitch is most efficent belt or gear and w

Post by aggiejim »

out standing now how about gear box efficency (my spelling sux)
there has to be loss from the change in direction and gear to gear contact lash oil viscosity ect
16 x 8 floral city ls2 6.0 aluminun block 2.3 ch3
can u say addicted
16.5 x8 alumintech new build
6.0 ls2 2.3 ch3 3 blade
the aggie

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glades cat
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Re: tech question whitch is most efficent belt or gear and w

Post by glades cat »

Here's a start for gear drives…

Gear Efficiency Comparison Table

No Type Normal Ratio Range Efficiency Range
1 Spur 1:1 to 6:1 94-98%
2 Straight Bevel 3:2 to 5:1 93-97%
3 Spiral Bevel 3:2 to 4:1 95-99%
4 Worm 5:1 to 75:1 50-90%
5 Hypoid 10:1 to 200:1 80-95%
6 Helical 3:2 to 10:1 94-98%
7 Cycloid 10:1 to 100:1 75% to 85%
http://www.meadinfo.org/2008/11/gear-ef ... -worm.html


http://machinedesign.com/mechanical-dri ... drive-cost
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Re: tech question whitch is most efficent belt or gear and w

Post by aggiejim »

ok as i see it. its a choice nither is the best its all about preferance
16 x 8 floral city ls2 6.0 aluminun block 2.3 ch3
can u say addicted
16.5 x8 alumintech new build
6.0 ls2 2.3 ch3 3 blade
the aggie

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Re: tech question whitch is most efficent belt or gear and w

Post by bonecollector »

The weight difference is the biggest dis advantage with the belt drive as far as I am concerned about 70lbs for a gear box vs almost 140lbs for a belt drive. Going off the shipping weight of the belt drive
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Re: tech question whitch is most efficent belt or gear and w

Post by SyS3d1t »

Belt drive does weigh more but also let's you lower the motor a few more inches
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Re: tech question whitch is most efficent belt or gear and w

Post by Olf Art »

A belt reduction is far superior to a gearbox if efficiency is the deciding factor ..... efficiency meaning the least power lost between the engine and the prop. The shortcoming of the belt is that they're more limited in the amount of torque they are capable of
handling. The Blue Lightning belt drive was (IMO) a near perfect reduction for an airboat.

The old 'Franklin' drives were heavy, but they'd run for hundreds of trouble free hours before they'd need the belt replaced, and
they were a lot quieter than the gearboxes available at the time.
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Re: tech question whitch is most efficent belt or gear and w

Post by aggiejim »

I think eventualy gear drive will be the wave of the future as technology improves and geats and lubricant gets better center of gravity advantage is a lost issue with aluminum block motors for ride boats
16 x 8 floral city ls2 6.0 aluminun block 2.3 ch3
can u say addicted
16.5 x8 alumintech new build
6.0 ls2 2.3 ch3 3 blade
the aggie

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