What does a "lifter" prop do??

[forescott]

I've seen a few of these 2-blade lifter-style props and have always wondered what they do, and what type of hull you would use one on. I'm assuming they tend to lift the transom somewhat, but why would you want this?? I need an expert opinion!

[befu]

Three point hydros,

[Flying Scotsman]

No expert!!! but again it comes down to the hull design etc. I was told to not use this type of prop on the new Insane Hydro, but they are used on hydros. Experimentation reveals all

Douggie

[Diesel6401]

Their for hyros and riggers. Designed to get the transom out of the water. At least I think

[Insaniac]

No expert!!! but again it comes down to the hull design etc. I was told to not use this type of prop on the new Insane Hydro, but they are used on hydros. Experimentation reveals all

Douggie

Who told you not to use a lifter prop on the new Insane hydro?

[forescott]

Reason I ask is because i was looking to use this prop on my miss llumar build. http://www.offshoreelectrics.com/pro...od=dh-aqub9755

[blackcat26]

It may work but I and JesseJ have both had great results with the "x" series. I was running right at 50mph with 642 with the stock BJ26 motor.

[Flying Scotsman]

Who told you not to use a lifter prop on the new Insane hydro?

It came from someone who should really know, figure it out, enough said

Douggie

[BakedMopar]

I'm no expert but all props create some amount of lift. "Lifter" props has a wider thrust cone therefore creating more lift at the transom. Yes it's used more on three point hydros.

[Gary]

Thats a very interesting statement........Lifter prop. A lifter prop is used when you find the transom of your hull "dragging" in the water and you want to lift it and get more air under your hull..{water has 10 times more drag than air from what i understand}. My opinion is just add a little downward angle with your two blade and that will lift the transom very easlly.

[properchopper]

It came from someone who should really know, figure it out, enough said

Douggie

[befu]

Thats a very interesting statement........Lifter prop. A lifter prop is used when you find the transom of your hull "dragging" in the water and you want to lift it and get more air under your hull..{water has 10 times more drag than air from what i understand}. My opinion is just add a little downward angle with your two blade and that will lift the transom very easlly.

A lot of hydros used to run solid shafts back when many of these props were developed. I remember when "flex drives" were the new thing and running it right along the bottom of the vee to get a semi surface drive! If you have a flex shaft, you are correct. Lots of adjustment options then.

[Fluid]

For many/most hydros, the right lifting prop design will produce more speed than any X prop can. The extra blade area and pitch ramps of these props increase efficiency and thrust on low drag hulls, and you will seldom see any FE hydro speed records set with non-lifting prop designs. For oval racing many do better with X props, chiefly because they eliminate the need to modify the prop to get the boat to work.

Most props can have their lift characteristics changed dramatically with a little bending or cutting. Just because someone has run a "lifting" prop on a boat doesn't mean he hasn't de-lifted it. Even X props can be changed to deliver more lift.



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