FRESH vs. SALT?

[wolf IV]

hmmm...? again, great point(s) and ideas, but still someone has to have a direct answer..? ill be running in fresh this next weekend and will know without a doubt wich is actually faster .. i guess..? id also like to know if theres a trim adjustment diference? two years ago when i ran a mono at legg lake for the first time it was real aparent that at high speeds it was looser/dryer...! but thats cuz id only ran in salt for two years prior to hitting legg lake. it was quite apparent though.. i guess we shall see...

[wolf IV]

My sv27 runs a tad hotter on salt water also.

thats what i think.. more drag/prop bite do to salt density...as stated above.

[teach]

Just guessing here, no facts whatsoever.

I would think a properly tuned boat would run faster in salt water's higher density. To me less slip would occur.

That's way to much thinking for one day....back to watching *!***!***!***!**.

[ls1fst98]

i can take my sv to the pond then to the saltwater all in a matter of minutes and can at least say which woul dbe faster, at least for my setup. but that still doesnt answer the question.

anyone have adegree in fluid dynamics and can answer this definatively??

[domwilson]

http://www.newton.dep.anl.gov/askasci/eng99/eng99631.htm

http://www.boatfix.com/how/props.html

"6. Salt water is more buoyant than fresh water; this may cause some hulls to run faster than identical freshwater setups."

[egneg]

http://www.newton.dep.anl.gov/askasc...9/eng99631.htm

I am in a dark room and I think someone is full of

[tiqueman]

No degrees in fluid dynamics but I can say this. I used to take my gassers back and forth between salt and fresh and I did need to make trim adjustments between the 2. I never Gps'd any of them, but ran them long enough to know when something wasnt right, didnt sound right or didnt look right inthe ride attitude.

I will also say that being an extremely active year round wakeboarder... had to put that year round in for you guys with frozen ponds right now.... I notice a huge difference of the ride attitude of my boat between fresh and salt, both conditions running at the same speed. Not having trim adjustments on a tournament wake boat, I have to adjust my ballast accordingly between the two to keep the wake shape the way we want it.

So Wolf, I will have to say that there very well could be some trim adjustment needed.... but Im no expert, just sharing my experiences.

[obrien]

salt water is faster than fresh water. I have plenty of time testing the same boats in both types and salt water is always faster. This is based on full size boats that I have run at work. I don't have a degree in fluid dynamics, but I do have alot of seat time.

[blizard05]

Let me say this, a lot has to do with water conditions, calm, slite ripple, or chop, can't compare without the same water conditions. Most boats will go faster with a little chop,than flat calm water

[wolf IV]

no degrees in fluid dynamics but i can say this. I used to take my gassers back and forth between salt and fresh and i did need to make trim adjustments between the 2. I never gps'd any of them, but ran them long enough to know when something wasnt right, didnt sound right or didnt look right inthe ride attitude.

I will also say that being an extremely active year round wakeboarder... Had to put that year round in for you guys with frozen ponds right now.... I notice a huge difference of the ride attitude of my boat between fresh and salt, both conditions running at the same speed. Not having trim adjustments on a tournament wake boat, i have to adjust my ballast accordingly between the two to keep the wake shape the way we want it.

So wolf, i will have to say that there very well could be some trim adjustment needed.... But im no expert, just sharing my experiences.

so compared to salt water to fresh what kind of trimming was taken?

[tiqueman]

Sorry wolf, been away from my computer. If I remember correctly, again, this is on gassers, 52" and up. My cat would run a two blade in salt and a 3 in fresh and I would run the strut lower in fresh. My Deep V, I would leave alone for the most part. it would run a tad more wet in fresh but not enough to really take the time to make adjustments. I sport ran both boats so I never went die hard test and tune to get optimum performance. Again, it was based more off of sound and what the hull was doing... along with runing w/ friends boats and knowing how much faster or slower I was compared to them in previous conditions. Also, for testing conditions, both fresh and salt running were in extreme glass conditions.

Being that our electrics are much lighter and ride much less in the water, Im not sure whats going to happen. Maybe there wont be enough "wet hull" to make a difference. I dunno???

[wolf IV]

Sorry wolf, been away from my computer. If I remember correctly, again, this is on gassers, 52" and up. My cat would run a two blade in salt and a 3 in fresh and I would run the strut lower in fresh. My Deep V, I would leave alone for the most part. it would run a tad more wet in fresh but not enough to really take the time to make adjustments. I sport ran both boats so I never went die hard test and tune to get optimum performance. Again, it was based more off of sound and what the hull was doing... along with runing w/ friends boats and knowing how much faster or slower I was compared to them in previous conditions. Also, for testing conditions, both fresh and salt running were in extreme glass conditions.

Being that our electrics are much lighter and ride much less in the water, Im not sure whats going to happen. Maybe there wont be enough "wet hull" to make a difference. I dunno???

thanks bud!! well i ran today up at lake forest lake!! all i can say is it was perfect.. A DREAM.... PROPPER CHOPPER.. GET OVER THERE ASAP!!! so i conclude that with the maritimo it ran 65 mph every time ( pretty much).. this is 2 mph slower than in salt. i knew it right away. also the boat seemed to ride wetter oot of the hole as exspected due to a lack of bouyency. but, was way dryer on full throttle once i got my speed up..? if i didnt let up on the throttle it would start walking . infact i swapped up trying to see if she would pull out of the walk her self.. no such luck! she still ran good , but if i was to run in frsh regularly i would have to drop the angle just a tad on the stingers. ill post 3 videos questek took of the runs/ crash... joe, thankyou again . we will have to do it again .. SOON!! :)

[wolf IV]

http://www.youtube.com/watch?v=sLh8g5mz9_k IM GONNA POST THESE HERE DUE TO THE THREAD STARTED, AND TO OBSERVE THE RIDE OF THE HULL ON FRESH WATER ALONG WITH GPS-ED SPEED..

[questtek]

Glad you enjoyed running on my Lake. Yes indeed, PropperChopper needs to bring a few of his toys down too! My 16' electric recovery boat had a bad connection but all is fixed and ready for the next runs. Hopefully we can get more FE guys from around the local area to join us. I will be at the CES show in Vegas this week but the following week is open for some more fresh water runs.

[properchopper]

OK, been meaning to get down to Lake Forest; will plan a trip soon- I've been tuning for WW VI but have some play boats as well. Looks like a nice pond !!