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Author Topic: 3 or 4 bladed prop, that is the question.  (Read 655 times)

Popeye

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3 or 4 bladed prop, that is the question.
« on: August 28, 2019, 11:03:47 PM »

What has to be taken into consideration  when deciding what type  of  prop  to use......or doesn't  it really  matter?
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malcolmfrary

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Re: 3 or 4 bladed prop, that is the question.
« Reply #1 on: September 03, 2019, 09:43:21 AM »

Start off with the type of boat.
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tsenecal

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Re: 3 or 4 bladed prop, that is the question.
« Reply #2 on: September 03, 2019, 10:42:30 PM »

If it is a scale model of a real boat, what type of prop does the real boat have....
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cdnfurball

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Re: 3 or 4 bladed prop, that is the question.
« Reply #3 on: September 07, 2019, 01:11:16 AM »

Sorry, but here's more questions for you to consider......
- size of prop
- pitch of the prop
- number of turns of the motor
And as you've asked, number of blades on the prop


Questions for a scale speed for a scale boat

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Hurric123

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Re: 3 or 4 bladed prop, that is the question.
« Reply #4 on: September 07, 2019, 03:53:40 AM »

Hi full size boats sometimes will fit 3 or 4 blade props simply because there is not enough room to fit a large enough diameter 2 blade to match to the power requirements.
With full size there are a lot of factors involved in chooising  props. Likewise on a yacht they will often only fit a 2 blade so they can park it behind the skeg to reduce drag when sailing. This can be a achieved by putting a mark in the shaft so they can line up the prop and shaft from the inside. I am sure many of you know all this but it's interesting stuff.
Regards
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