Water pickup drag testing

[grsboats]

Travis I always run riggers and can tell you that using a knife rudder on my saw nitro and FE boats there is significant difference in speed....I'm curious to see in your boats too .Gill

[kfxguy]

Travis I always run riggers and can tell you that using a knife rudder on my saw nitro and FE boats there is significant difference in speed....I'm curious to see in your boats too .Gill

Let me give you a nice laugh. 100. Mph. Saw. Boat. Rudder. Lmao

Look how long

[grsboats]

So if. you want to make a good test try a knife rudder in this cat

[kfxguy]

So if. you want to make a good test try a knife rudder in this cat

Scared to. It's dialed in nicely and if I decrease rudder drag it's likely going to blow over.

[jaike5]

Some of the guys up here in the great white north think out side the box .... well several boxes ! JB weld/epoxy brass tubing down the back of the rudder( clean and ruff both surfaces) with just a hair past the bottom of the rudder or less. worked very well for Marc Andre's p-hydro
Cheers, Jay.

[srislash]

And honestly for SAW runs would big heat sinks instead of watercooling do the trick. I mean how many seconds are you 'on it'?
Just another outside the box thought. Not to mention I need to sub in here.

Back to Travis' testing

[Nikolas Andriop]

I use a mini brushless water pump with a remote switch from 3 channel and it weights almost nothing...
I bought it from ebay and i've tested up to 18 volts!!!!!!
Even when the boat is stoped it cools down everything...
IMG_6112.jpg

[kfxguy]

I use a mini brushless water pump with a remote switch from 3 channel and it weights almost nothing...
I bought it from ebay and i've tested up to 18 volts!!!!!!
Even when the boat is stoped it cools down everything...
[ATTACH=CONFIG]143625[/ATTACH]

Anyway you provided me a link to this pump?

[Turbo Dan-O]

Holy damnit. That's a good idea. Thanks for that! I've seen the gundert ones but I like this much better. My builds are now going to change a bit. I guarantee that's the least drag setup there.

How sexy would that be! Use a coupe of these...
http://www.offshoreelectrics.com/pro...prod=ose-80400

[T.S.Davis]

Anyway you provided me a link to this pump?

Yes please.

[kfxguy]

I wonder if the pump is this one. I'm interested

http://www.ebay.com/itm/DC12V-2L-min-6W-Miniature-Brushless-Motor-Submersible-Water-Pump-food-grade-/131829374328?hash=item1eb1a49d78:g:HqYAAOSwNsdXSAk~

Dan o, I have some of those fittings and they are huge. Like 1/4 Id hose fits on the nipple. Lol

[dmitry100]

No, its not that one. One sec.

[T.S.Davis]

Found this. Pretty sweet.

http://www.simplypumps.com/pumps/memax-pumps/memax-300-12.aspx

[dmitry100]

This is a "diaphragm" based pump... pretty fast if you give it enough voltage (12v+). Its sort of a heavy duty. I'll update with the weight of this thing.

http://www.ebay.com/itm/R385-Aquarium-Fish-Tank-Water-Air-Diaphragm-Pump-DC-12V-SDE-/131655430387?hash=item1ea74670f3:g:2xkAAOSwnGJWTLNg

I also have this one, it was cheap but this is the most common type of pump out there-- the Gear based pump. Doesn't really like much voltage... motor gets kind of hot at 12v.

http://www.ebay.com/sch/i.html?_odkw=2+Mini+Water+Priming+Pump&_sop=15&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.XMini+Water+Priming+Pump.TRS1&_nkw=Mini+Water+Priming+Pump&_sacat=0

Most commonly seen used in SAW cat builds from MBP-RC (It is also gear based). It's 28 euros... oddly expensive for some reason:

http://mbp-rc.de/Water-Pump

[T.S.Davis]

These might be fun to experiment with for the price.

http://www.ebay.com/itm/10pcs-Mini-Water-Pump-1-1M-120LPH-For-Fountain-Water-Circulation-System-DIY-toys-/301643184495?hash=item463b55b96f:g:U30AAOSwpdpVYax8