Why clever only for #6?
03-08-2012, 03:01 PM
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Why clever only for #6?
This question has always baffled me. Why are the only props available for merc #6 drives and now #8 also clever style propellors (or is someone making different styles I'm not aware of?).
My limited understanding of prop design was that clever style props offered little in the way of bow lift, and actually tended to lift the stern a touch. This is good for cats and hydro's but deep v boats require bow lift, hence the reason mercury makes a huge array of different style props for its outboard range to accommodate this.
I do understand rake can assist with bow lift and have noticed a lot of the 6 drive props incorporate this, just couldn't imagine the clever design being the answer for every application.
My limited understanding of prop design was that clever style props offered little in the way of bow lift, and actually tended to lift the stern a touch. This is good for cats and hydro's but deep v boats require bow lift, hence the reason mercury makes a huge array of different style props for its outboard range to accommodate this.
I do understand rake can assist with bow lift and have noticed a lot of the 6 drive props incorporate this, just couldn't imagine the clever design being the answer for every application.
03-09-2012, 02:38 PM
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Wow. I expected a lot more people would be able to explain this one.
The reason I ask is I want to setup a 21' deep v with 700ish hp na. It's on the on high side for a bravo xr but I don't like the idea of running a #6 purely cause the drive needs to be run deep to prevent rooster tail hitting skiers and clever props are not the best style prop for a deep v boat (from what I understand). Not to mention mercury want an arm and a leg for #6 props!
The reason I ask is I want to setup a 21' deep v with 700ish hp na. It's on the on high side for a bravo xr but I don't like the idea of running a #6 purely cause the drive needs to be run deep to prevent rooster tail hitting skiers and clever props are not the best style prop for a deep v boat (from what I understand). Not to mention mercury want an arm and a leg for #6 props!
03-09-2012, 03:04 PM
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Well, I may be way off here, but I didn't think a six drive was meant to be mounted deep, they are a semi-surfacing drive and the prop is meant to surface somewhat. Most #6 drives I have seen are usually mounted with the prop shaft even, or close to even with the bottom of the hull or notch. Not an expert by any means about these drives, just what I read about them.
03-09-2012, 03:17 PM
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Wow. I expected a lot more people would be able to explain this one.
The reason I ask is I want to setup a 21' deep v with 700ish hp na. It's on the on high side for a bravo xr but I don't like the idea of running a #6 purely cause the drive needs to be run deep to prevent rooster tail hitting skiers and clever props are not the best style prop for a deep v boat (from what I understand). Not to mention mercury want an arm and a leg for #6 props!
The reason I ask is I want to setup a 21' deep v with 700ish hp na. It's on the on high side for a bravo xr but I don't like the idea of running a #6 purely cause the drive needs to be run deep to prevent rooster tail hitting skiers and clever props are not the best style prop for a deep v boat (from what I understand). Not to mention mercury want an arm and a leg for #6 props!
03-09-2012, 03:18 PM
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Good Question, Kurt
You might have better luck posting this question in the prop talk forum.
Someone like bblades would likely see it and respond.
I'm guessing the cleaver style props, with their thick trailing edge, is the only style strong enough to hold up to massive amounts of horsepower.
Someone like bblades would likely see it and respond.
I'm guessing the cleaver style props, with their thick trailing edge, is the only style strong enough to hold up to massive amounts of horsepower.
03-09-2012, 03:29 PM
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Thanks msm. Anyone know how I can just move whole thread there?
03-09-2012, 03:32 PM
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03-09-2012, 03:32 PM
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This question has always baffled me. Why are the only props available for merc #6 drives and now #8 also clever style propellors (or is someone making different styles I'm not aware of?).
My limited understanding of prop design was that clever style props offered little in the way of bow lift, and actually tended to lift the stern a touch. This is good for cats and hydro's but deep v boats require bow lift, hence the reason mercury makes a huge array of different style props for its outboard range to accommodate this.
I do understand rake can assist with bow lift and have noticed a lot of the 6 drive props incorporate this, just couldn't imagine the clever design being the answer for every application.
My limited understanding of prop design was that clever style props offered little in the way of bow lift, and actually tended to lift the stern a touch. This is good for cats and hydro's but deep v boats require bow lift, hence the reason mercury makes a huge array of different style props for its outboard range to accommodate this.
I do understand rake can assist with bow lift and have noticed a lot of the 6 drive props incorporate this, just couldn't imagine the clever design being the answer for every application.
03-09-2012, 03:37 PM
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