Re: how much can you do with prop options
limit, I tried to give you some basic knowledge about prop exhaust systems as well as prop rake and blade surface area. Props are not like tires on a car, although they both move objects of different sizes, weights and horsepower in a forward direction, and that is why I call it the black art of propellers.
I have tried before to give people more knowledge by explaining different prop characteristics and the effects it has on how a prop will theoretically react on a particular boat and motor, and it has not worked very well for me, as people find the explanations either too boring, they do not have enough knowledge to understand the principles involved or I am just not good at all in trying to convey knowledge and it is probably the latter, although I do have one that has over 7,500 views and I am very happy with that.
" limitout, as smoke mentioned "EVERYTHING done with prop design is a tradeoff "
" I had a very spirited discussion on here one time with 45Auto , who is extremely knowledgeable in the field of fluid dynamics, which is a subject that is beyond my base of knowledge. So I decided that I was going to put a lot of effort into learning what I needed to understand in order to use these complex equations, so I could utilize them to have a better knowledge in water flow on props and boats. After about 3 months reading theory and working with equations I finally figured out that I would have to spend years in order to gain the knowledge required to actually use them in any manner that would be useful in my applications, so I gave up. "
There are people here in the prop forum who have been helping people with questions about a better prop for their boat and motor for years and I will take this opportunity to name a few that I know of steelespike, smokeonthewater, and Texasmark. They had prop knowledge before they got on Iboats and as they have helped more and more people their knowledge has increased substantially over the years, and they do this for FREE, because they enjoy helping other people with problems and much less knowledge about propellers. And the two best prop Guru's that I ever knew on here were Dhadley and walleyehed, and their knowledge of props was just astounding, because they worked with them everyday for years and years, and I am so sorry that their knowledge and expertise is not available here anymore.
What I am trying to tell you is that if you really want to know about all of the idiosyncracies involved with props and their attendant relationship with any particular boat hull, weight and motor combination then you will have to spend more time than I did trying to learn more about fluid dynamics, and not give up.
" limitout: so it seams there are just so many ways to get to a desired result from a prop that its hard to say there is anything to look for in design because if you concentrate on one aspect too much you can make a worse choice then if you chose without being informed. "
And that is why people come to this forum, to get help from people who have more knowledge to help them pick a BETTER prop for their particular boat and motor and their particular uses and needs, not always the BEST prop by any means. Props are not cheap and buying the wrong ones and having to replace them because they don't perform the way you need them to can be very expensive.
so he suggests I just get a 4 bladed version of the same exact prop I already have now even though that prop is causing too much bow lift :mad-new: (thanks for such a great idea mr power tech salesman)