50" Hydro Build

[Brushless55]

nice job man!
I'm starting to really itch for a gas size hydro or rigger with this motor on 10s and 12s now

[Make-a-Wake]

Big Water...............Big Wind.................

Thanks brushless...........grab one up!!

OK, pretty windy, up to 15 mph gusts and fairly big chop..............keep in mind the chop looks small against Big red, but it was good size and it was rolling in towards us so on the long passes she was riding the crests coming in from side to side.

Total runtime was 2:42 and the ESC cut out a bit after the last sprint pass in the vid. It would start back up but only go slow..........possible LVC, not sure what its set at, thought it was 3.0v, batts register 3.82 +/- per cell. Motor was about 130* according to the 5 second finger method(gotten good at it), since my temp gauge wasnt handy, ESC hotter, probably 150* or so. I have to figure out if it was the ESC or thermalling........i'm leaning towards LVC, but i cant seem to get a real good flow thru the speedo, the darn cooling tubes are so small in diameter thru the whole length of them.

I was apprehensive to WOT it every straightaway due to chop, but the run at 1:40 is a WOT for sure and a great sprint......looks like a real 1/1 Hydro!!

9s2p........

[Make-a-Wake]

BTW Brushless, here was my 'original' first hull choice, but i changed my mind at the last minute:

http://www.nitrorcx.com/99b-12001-tp-1300-kit.html

[keithbradley]

I like the part of the video that goes like this:
????...


Looks good man Im guessing you are hitting the LVC. If you're only getting less than 3 minute runs, you are pulling enough current to seriously drop voltage under load. Im not surprised that the cells are going under 3v under load and 3.8 unloaded. I have actually hit 3.2v cutoffs with fully charged lipos when the current draw is high enough. Running a series of 4 lipos isnt helping either. Shorten those wires up or go to larger packs and you will see more speed and a bit longer runtime before you hit the LVC.

EDIT:
By the way, I know I owe you at least one video...I'll get one as soon as teh weather cooperates!

[Make-a-Wake]

Thanks Keith, i was running only 9s2p in this one with three 3s 5000 40c batts in series, then paired with another set for 10,000 mah and 400a cont.

With the amp draw climbing to close to 200 amps, its sucking some big juice...........man, under 3 minutes for 10,000 mah..........??? Gonna check LVC and set it to 3.0 if its not already there.

BTW, i have room for 9s3p................would add a little more weight up front............

[Brushless55]

That looks and sounds awesome!
keep it up bro

[keithbradley]

9s3p? If you have that many lipos you should just buy my mono and throw some in there

I'll even take the orange hydro as partial payment

You may want to invest in a large trailer to haul around so many big boats though...

Have you GPSed this boat yet?

[Make-a-Wake]

9s3p? If you have that many lipos you should just buy my mono and throw some in there

I'll even take the orange hydro as partial payment

You may want to invest in a large trailer to haul around so many big boats though...

Have you GPSed this boat yet?

As tempting as your very cool Boat is.........I may be going another avenue for large mono. Yes, i have shown the Garmin GPS at the end of three of the vids..............59 mph fastest.........

I happen to have another NIB 2028........................needs a home

and i am in love with this bad boy:

........

[keithbradley]

As tempting as your very cool Boat is.........I may be going another avenue for large mono. Yes, i have shown the Garmin GPS at the end of three of the vids..............59 mph fastest.........

I happen to have another NIB 2028........................needs a home

and i am in love with this bad boy:

........

I've never stuck around to see the very end of the videos I guess...what a stupid question, huh?

I looked at that mono too...pretty sweet. RCMK has some pretty sweet looking large monos too but getting them to ship them here is anothr thing.

So does this mean I have to get 59mph or do I get a handicap for having the smaller motor?

[Jacked1]

The hydro really looks like a real one in the vid! It makes me want to get a hydro and a mono from the same place. Too bad cool stuff costs money

Your boat would be sold if I was graduated Keith!

Oh and wake, Your comment about enjoying your Villian got me to dust off mine! I completly gutted it and sliced off the transom and made a flat wood one so I will have more room to mount hardware. The glue is drying now! (I can get back to building now since it is spring break).

[Make-a-Wake]

Keith, i'll give you 4 mph.............. The GTX i'm looking at is 65"........you were aware it was the big'n right? There is a smaller 45" version quite similar.

Jared, Thanks for the nice comments, yea, had to run the ol Villain........still fun as can be for a 40 mph basher!

[Make-a-Wake]

Did some checkin on the SF240hv and the nipples for the cooling tubes on the ESC were very small........it was very hard to blow thru the whole length of tube, thru the ESC twice and then back out of the hull. I bored the nipples out and i must have gained 50% more flow..........blowing thru the bored side was much easier and it was very noticable that it was a better air flow out the other side...............gonna do the other side next.

I also replaced an 18" length of cooling tube with straight brass for less resistance in the whole system...........This should really cool things down i hope.........although the ESC hasnt been horribly hot, any cooling help is always a plus.

[millzee]

Are you happy enough with these esc's?

Did some checkin on the SF240hv and the nipples for the cooling tubes on the ESC were very small........it was very hard to blow thru the whole length of tube, thru the ESC twice and then back out of the hull. I bored the nipples out and i must have gained 50% more flow..........blowing thru the bored side was much easier and it was very noticable that it was a better air flow out the other side...............gonna do the other side next.

I also replaced an 18" length of cooling tube with straight brass for less resistance in the whole system...........This should really cool things down i hope.........although the ESC hasnt been horribly hot, any cooling help is always a plus.

[Make-a-Wake]

Yep, the ESC is a good one, no problems yet, has a setup attatchment that you flip small switches up or down to set the parameters. Havent had one problem, and im pulling some high amps with it.

[old guy]

Have you got a cooler on the motor?? If you like this boat I'm looking forward to seeing what you think of it with a good prop on it. I have seen boast go as much as 10MPH faster with a prop change. Got both of my motors in now and they are big and Neu has lipos on sale so just got some of them should see them soon. not sure what ESC I will use but if yours is working good for that price way not.. did you order a new prop yet??
Rick