ALLAN YUEN
Well-Known Member
- Joined
- Jan 14, 2005
- Messages
- 6,427
I figure that mean water test for water quality? different lake & pond? check on total hardness lab? I am wrong info? Can you explain how to work? :blink:
I add .004 when the Air Goes BAD & the Humidity is Up...... Also the next size pipe as short as possible will free up the engine. If the .004 dont help out? You will have to give the engine back some Air/fuel from a larger pipe.I don't know about salt water effect on a boat hull, but I can tell you that altitude pressure will messI think that unless its salt water its insignificant and altitude pressure is the key to a sticky pond and a not so sticky pond.I also feel that shore line has allot to do with how sticky the water feels.
Could be wrong.
Grim
up a good runnin motor/ prop combination in a minute. Especially with smooth water. Put bad air with
smooth water together, and you have a slowwww boat. I had it happen this years Nats in time trials,
not just me , alot of slow speeds then.
Seville pond is at 1,800' (I think).. I know it cought me quite off gaurd as well.
Grim
Greg is on the right track here. Surface tension is much more important than water density when running on fresh water.The "sticky water" is really an issue called surface tension. The tension (ability of water molecules to stick together and stick on other things) is electical charges within the molecule. Many things can either enhance this ability or degrade it such as disolved minerals, temperature, other pollutants. If someone had an Ohm meter that would read small enough, the resistance for specific lakes could be measured and a correlation set up for the strength or weakness of that resistance and then how it relates to the surface tension.On the other hand, if this hobby were to get that scientific, I certainly would hope the purse money be proportional!
Cabin feaver shows itself in all sorts of ways!
I will admit I definately noticed a difference in the water tension at Seville OH during the 07 internats. the water seemed to stick like glue.
gh
I think it's more a figment of you amagination, no one was at the Brandon pond to see your boat running well,Well Im sure the 3 R's will rip me to shreads for this BUT- I believe some ponds are faster for a given setup than others(water quality wise)- ie
I have run my 40 mono at Brandon the day before a race in Orlando (airport pond) and nothing but the drive 90 miles down the road and 15 hours changed( air temp-humidity-sea level) other than , I could NEVER pull as much prop in that pond and always struggled duplicating the speeds from our pond to theirs :huh: I even stopped in Brandon on the way to Orlando once and had the same issue. My boat ALWAYS ran best at the old Tampa lake(you could see 25 feet down -very clean water) Might be just me as I'm sure one of my good friends will enlighten me
But I think some water is faster than others.........
Now somebody else figure out why ??? and how to deal with it
Andy
I think it's more a figment of you amagination, no one was at the Brandon pond to see your boat running well,Well Im sure the 3 R's will rip me to shreads for this BUT- I believe some ponds are faster for a given setup than others(water quality wise)- ie
I have run my 40 mono at Brandon the day before a race in Orlando (airport pond) and nothing but the drive 90 miles down the road and 15 hours changed( air temp-humidity-sea level) other than , I could NEVER pull as much prop in that pond and always struggled duplicating the speeds from our pond to theirs :huh: I even stopped in Brandon on the way to Orlando once and had the same issue. My boat ALWAYS ran best at the old Tampa lake(you could see 25 feet down -very clean water) Might be just me as I'm sure one of my good friends will enlighten me
But I think some water is faster than others.........
Now somebody else figure out why ??? and how to deal with it
Andy
but everyone was present in Orlando to see your dismal performance!
Kinda like the old "if a tree falls in the woods, and no one is there to hear it, does it really make noise"
How ya doin Andy
There are certain chemicals that are "surface tension eliminators". Anyone use rain-X on your windshield?? Done right you eliminate the need for windshield wipers (it's not a wax). I'm not a chemist but what ever the formula is for rain-x essentially stops the surface tension of water causing it to bead up and run off without much force.Greg is on the right track here. Surface tension is much more important than water density when running on fresh water.The "sticky water" is really an issue called surface tension. The tension (ability of water molecules to stick together and stick on other things) is electical charges within the molecule. Many things can either enhance this ability or degrade it such as disolved minerals, temperature, other pollutants. If someone had an Ohm meter that would read small enough, the resistance for specific lakes could be measured and a correlation set up for the strength or weakness of that resistance and then how it relates to the surface tension.On the other hand, if this hobby were to get that scientific, I certainly would hope the purse money be proportional!
Cabin feaver shows itself in all sorts of ways!
I will admit I definately noticed a difference in the water tension at Seville OH during the 07 internats. the water seemed to stick like glue.
gh
Many things will effect surface tension. There are devices for measuring suface tension.
More surface tension will cause a prop to lift more because the surface is more difficult to pierce.
Boats will launch easier and run cleaner on high surface tension for the same basic reason.
Every pond is generally different. There are many different things that effect surface tension.
When it comes to set up, there is definately a "home court" advantage.
Yes when we must Ohm the water before we launch, Cabin fever has arrived....... Maybe just a Good Spray of nitro in the face from a Twin would help at this point?? :lol:The "sticky water" is really an issue called surface tension. The tension (ability of water molecules to stick together and stick on other things) is electical charges within the molecule. Many things can either enhance this ability or degrade it such as disolved minerals, temperature, other pollutants. If someone had an Ohm meter that would read small enough, the resistance for specific lakes could be measured and a correlation set up for the strength or weakness of that resistance and then how it relates to the surface tension.On the other hand, if this hobby were to get that scientific, I certainly would hope the purse money be proportional!
Cabin feaver shows itself in all sorts of ways!
I will admit I definately noticed a difference in the water tension at Seville OH during the 07 internats. the water seemed to stick like glue.
gh
JoeYes when we must Ohm the water before we launch, Cabin fever has arrived....... Maybe just a Good Spray of nitro in the face from a Twin would help at this point?? :lol:The "sticky water" is really an issue called surface tension. The tension (ability of water molecules to stick together and stick on other things) is electical charges within the molecule. Many things can either enhance this ability or degrade it such as disolved minerals, temperature, other pollutants. If someone had an Ohm meter that would read small enough, the resistance for specific lakes could be measured and a correlation set up for the strength or weakness of that resistance and then how it relates to the surface tension.On the other hand, if this hobby were to get that scientific, I certainly would hope the purse money be proportional!
Cabin feaver shows itself in all sorts of ways!
I will admit I definately noticed a difference in the water tension at Seville OH during the 07 internats. the water seemed to stick like glue.
gh
Yes when we must Ohm the water before we launch, Cabin fever has arrived....... Maybe just a Good Spray of nitro in the face from a Twin would help at this point?? :lol:The "sticky water" is really an issue called surface tension. The tension (ability of water molecules to stick together and stick on other things) is electical charges within the molecule. Many things can either enhance this ability or degrade it such as disolved minerals, temperature, other pollutants. If someone had an Ohm meter that would read small enough, the resistance for specific lakes could be measured and a correlation set up for the strength or weakness of that resistance and then how it relates to the surface tension.On the other hand, if this hobby were to get that scientific, I certainly would hope the purse money be proportional!
Cabin feaver shows itself in all sorts of ways!
I will admit I definately noticed a difference in the water tension at Seville OH during the 07 internats. the water seemed to stick like glue.
gh
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