4 blade prop vs 3

2 more inch pitch will lost 400 rpm but more top speed. Testing 3 Blade vs 4 Blade Propellers Whats the Difference Between 3 and 4 Blade Outboard Props - YouTube.

February 24 2012 at 849 pm 1275958.

4 blade prop vs 3. Additionally although the blades on a 4 blade propeller are typically smaller than the blades on a three-blade propeller they offer more total blade area because of the additional blade giving them more grip on the water. The difference between a 3-blade prop vs a 4-blade prop is that the 3-blade smaller blade ratio is faster with a higher top speed and the 4-blade higher blade ratio has a better hole-shot acceleration and better stern lift as well as better handling and fuel economy because it will keep you on plane at. The short answer is the 4 blade propeller has more surface area and bite which allows a boat to get up on a plane and maintain it easier at a lower RPM.

However the 3 blade prop has less surface area which offers less drag and more top speed than the 4 blade prop. By Jim Hendricks. Three-blade props offer a nice compromise when it comes acceleration efficiency lift and speed.

A four-blade propeller on the other hand can boost acceleration efficiency or lift but at the cost of a lower top speed. Jim Hendricks Sport Fishing. Most of the time when you decrease 3-blade prop slip by at least 10 you can improve top end speed.

So the 4 th blade can provide increased water displacement capability lift and grip as compared to the comparable 3-blade propeller. In terms of actual boat performance the 4-blade can enhance handling hole shot low-speed planning ability cruise efficiency fuel efficiency load-carrying. 3 Blade vs 4 Blade Propellers Whats the Difference Between 3 and 4 Blade Outboard Props - YouTube.

Mar 19 2020. Three or four blades are just some of the design consideration. Really depends on your performance criteria or what problem your trying to fix.

I went from an inexpensive 3 blade stainless to an OE 4 blade stainless then back to a performance 3. Both of these aircraft were designed on the earlier Hawker Typhoon which used a 3 bladed propeller in early production models before a 4 blade model was introduced in February of 1944. Engineers need time to develop new products that are durable and deliver on the demands placed upon them.

4 blade props tend to load the engine more - if you compare a 3 blade prop of identical blade size and pitch. 4 blade props tend to have a lower top speed. When asking about rpm - it is essential that you note my comment on the comparison between identical blade sizes with repect to both shape length size and design - when comparing 3 and 4.

My 60 196 is currently running a 4 blade prop no complaints but more than one person has said to me lately that a 3 blade prob is the popular choice these days. I know these are just opinions not facts Im thinking about grabbing a spare prop and thought it might be worth trying a 3 blade just to see what the difference is if any. 2 3 or 4 Blade Prop Im coming from 10 years in fixed wing and was led to believe that 2 blade props were more efficient than 3 which in turn were more efficient than 4.

Yet I come into the micro quad world and find most quads with 4 with the occasional 3 blade. Theoretically a 3-blade propeller should always be more efficient than a 4-blade. However in the past two big issues have prevented the 3-blade from taking the lead in popularity.

The first was a lack of manufacturing precision which commonly caused 3-blades to vibrate more than 4-blades. Generally yes a 4- blade will be less efficient than a 3-blade for the simple reason that the leading edge of the prop loses efficiency as it encounters the disturbed water left by the blade in front of it. Typically a 3-bladed prop will have more space between the blades to reduce that effect.

Testing 3 Blade vs 4 Blade Propellers Whats the Difference Between 3 and 4 Blade Outboard Props - YouTube. A four blade gives better holeshot much better in cornering and the top end loss is negligible. At least on my 115 4 stroke.

Also I can run my motor higher in the water column with a 4 or 5 blade prop which actually gives me more top end as I dont get slippage and cavitation like I. Forget about the 4 blades prop. Get a 3 blades prop 10x14 pitch.

2 more inch pitch will lost 400 rpm but more top speed. 4 blades prop is best suited for gladesman 18 due to flatbottom hull and will run shallower than gheenoe classic. Gheenoe classic is best for 3 blades propeller and a high speed boat due to kinda like a vee hull.

IDO Community Forums Fishing Forums General Discussion Forum 4 blade or 3 blade prop. 4 blade or 3 blade prop. February 24 2012 at 849 pm 1275958.

This may be a dumb question but i just purchased a boat and it came with 2 props. The motor is a 115 Mercury 4-stroke and it has a new 4 blade. When moving from a 3 blade 16 X 215P to a 4 blade prop WE SHOULD HAVE selected the 4 blade 1525 X 22P in the first place as the 75 reduction in diameter had a dramatic effect on WOT RPM.

At 500 and up there isnt much room for economical. Jon tries three different Mercury propellers on an outbo. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How YouTube works Test new features 2021.

I much prefer 4 blades on my props despite tuning for speed the smoothness and grip is substantial. Mu ultimate go to prop thats always achieved the best speed and rpm range on the last 3 boats is a merc rev4. But swapping props is expensive.

Its a trade. 3-blade is simpler and lighter but larger diameter and more highly loaded so individual blades are harder to make. But engineers seem to be getting better at designing props with more blades.

Look at the C-130.