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Author Topic: Prop. shaft angle  (Read 2463 times)

bbdave

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Prop. shaft angle
« on: August 27, 2009, 05:11:48 pm »

Is it best to mount the prop. shafts on a scale boat at the same angle as the original boat or is there no advantage?
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DickyD

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Re: Prop. shaft angle
« Reply #1 on: August 27, 2009, 05:16:35 pm »

If you want a scale boat mount them at the same angle. :-))
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bbdave

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Re: Prop. shaft angle
« Reply #2 on: August 27, 2009, 07:09:25 pm »

But does the angle differ due to the water not being scaled down as the boat is so a model will sit differently to full size with the same angle.
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DickyD

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Re: Prop. shaft angle
« Reply #3 on: August 27, 2009, 07:31:26 pm »

No. :-))
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Proteus

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Re: Prop. shaft angle
« Reply #4 on: August 27, 2009, 07:40:35 pm »

Is there a reason why you want to use a different angle ?? remember they test full size boats by putting models in test tanks, or they did for the last god knows how long.

Proteus
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Martin [Admin]

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Re: Prop. shaft angle
« Reply #5 on: August 27, 2009, 10:08:00 pm »


The lower the angle the more power will be transmitted as thrust instead of lift... well for sports boats anyway.
Take a look at the angle of the Precedent's model of the Huntsman, it looks about 30o
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Bryan Young

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Re: Prop. shaft angle
« Reply #6 on: August 27, 2009, 10:19:27 pm »

Just try to get the shafts as horizontal as possible, stop worrying about it and enjoy the result.BY.
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Notes from a simple seaman

bbdave

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Re: Prop. shaft angle
« Reply #7 on: August 27, 2009, 10:26:31 pm »

not worried just wandered
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bbdave

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Re: Prop. shaft angle
« Reply #8 on: August 27, 2009, 10:37:26 pm »


The lower the angle the more power will be transmitted as thrust instead of lift... well for sports boats anyway.
Take a look at the angle of the Precedent's model of the Huntsman, it looks about 30o


So in that case if you had the shafts more horizontal would the boat plane as well? or do you still need that certain amount of lift.
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Martin [Admin]

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Re: Prop. shaft angle
« Reply #9 on: August 27, 2009, 10:41:47 pm »


On a planing type boat the hull shape and strakes will provide the lift.
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OMK

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Re: Prop. shaft angle
« Reply #10 on: August 27, 2009, 11:09:07 pm »

"not worried just wandered"

Negatory. Not wandered, but wondered.

What's that?
Nah, no need for thanks. Just but me a few dozen pints some day.
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OMK

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Re: Prop. shaft angle
« Reply #11 on: August 27, 2009, 11:12:12 pm »

Besides, if I'm that smart then how come I spelt 'buy' with a 't'?
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bbdave

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Re: Prop. shaft angle
« Reply #12 on: August 28, 2009, 12:31:05 am »

"not worried just wandered"

Negatory. Not wandered, but wondered.

What's that?
Nah, no need for thanks. Just but me a few dozen pints some day.

I'm sure the world wont stop turning.
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