Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Other Technical Questions... => Topic started by: bbdave on August 27, 2009, 05:11:48 pm

Title: Prop. shaft angle
Post by: bbdave 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?

Title: Re: Prop. shaft angle
Post by: DickyD on August 27, 2009, 05:16:35 pm

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

Title: Re: Prop. shaft angle
Post by: bbdave 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.

Title: Re: Prop. shaft angle
Post by: DickyD on August 27, 2009, 07:31:26 pm

No. :-))

Title: Re: Prop. shaft angle
Post by: Proteus 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

Title: Re: Prop. shaft angle
Post by: Martin (Admin) 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 30^o

Title: Re: Prop. shaft angle
Post by: Bryan Young 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.

Title: Re: Prop. shaft angle
Post by: bbdave on August 27, 2009, 10:26:31 pm

not worried just wandered

Title: Re: Prop. shaft angle
Post by: bbdave on August 27, 2009, 10:37:26 pm

Quote from: Martin - Admin 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 30^o

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.

Title: Re: Prop. shaft angle
Post by: Martin (Admin) on August 27, 2009, 10:41:47 pm

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

Title: Re: Prop. shaft angle
Post by: OMK 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.

Title: Re: Prop. shaft angle
Post by: OMK on August 27, 2009, 11:12:12 pm

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

Title: Re: Prop. shaft angle
Post by: bbdave on August 28, 2009, 12:31:05 am

Quote from: PMK 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.

I'm sure the world wont stop turning.