PRO BOAT UL-19_How to run on 6S with stock prop

[sammyha]

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[sammyha]

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[JJROTOGEEK]

Hey this is a great thread, keep up the good work [emoji869] something to consider on your next boat and cooling mod, use an under hull dual intake, 8$ great cooling


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[sammyha]

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[sammyha]

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[scottyp]

Question for Sam

Sam,

How in the world did you get the existing water outlet nipple out of the boat to replace with the 2 larger diameter outlets from OSE? I simply cannot get mine out. When I manage to get a socket around the bolt on the inside (not an easy feat in itself) and then stick a flathead screwdriver into the slot on the outsode of the nipple and start turn it, the flathead just strips the slot away as the aluminum is so soft. I feel like maybe the applied some sort of glue to the threading where the bolt is that caused it to bond solid.

For the rest of the cooling system upgrade I used...

Large 9/32" tubing.
The grommets for 6.8mm or large tubing.
Large outlets.

All purchased from Offshore Electrics website...



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[sammyha]

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[scottyp]

thx

Thanks as always. My boat is here and I'm feverishly starting all of the upgrades!

They were tough to get out. I chewed my screwdriver slots up some too, but got them out. Try heating the outlet with a small soldering iron. Or drill the outlet out completely.

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[sammyha]

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[scottyp]

I actually just bought one- what a handy little device! I'll keep you posted on the progress. Hoping to have her ready for water within 2 weeks given my busy travel schedule. I've got a S&B Dasboata 1716 prop ready to go, dual intake rudder (the one from RC Boat Bitz in AU which has two intake holes on each side of the rudder which I am hoping will alleviate the need to do your brass tube mod), an after-market turning fin that is apparently superior to the one that comes with it, both an upgraded OSE drive shaft and larger diameter one and just about everything else I need from connectors and larger bore nipples to keep the temps down. Once all that is installed I will do some adjustments to the strut height based off your posts here and hopefully be ready to go. I probably won't take my strut height/angle quite to the level you did as I'm not looking for all-out brute speed but I'm sure some small adjustment will help. Thanks again for all the intel.

Great! Sounds like you're getting right to it.

Do you have a temperature gun?

My cooling system upgrade on 6S with stock 1716 prop is good for 5 laps as hard as I can push it. Hitting 55ish plus mph. That's around 1-1/2 minutes.

I have run a fresh charge on my Revolectrix lipos for 3-1/2 minutes just mucking around. Running circles with some straight speed bursts of 60mph plus mixed in there. So, that's a pretty short run. But a ton of power and fun!

Comes in for both at 135ish on the esc and 125ish on the motor. Lipos were done after the 3-1/2 minute run at 3.8 volts per cell.

Just keep an eye on it, find out for yourself what it can handle...

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[sammyha]

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[scottyp]

Interesting, not sure how I missed that you had the same one. Any thoughts as to which system I should connect to the left side inlet? Motor or ESC?

Same rudder I bought. Had two inlets. Whichever system you hook up that gets water from the left side inlet will run hotter turning laps to the right. Be fine if you're not pushing it hard...

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[sammyha]

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[scottyp]

Good to know. The AU one is definitely better equipped to draw more water. Along with more intake holes (and larger diameter as well) the nipples on the top of the rudder have a larfer internal diameter as well. Did you by chance think about drilling out the intake/outflow nipples on your ESC by chance? Seems logical that if all of the intakes, exit nipples and internal diameter of the tubing is larger, it would all get bottlenecked with the smaller diameter holes on the ESC nipples. I drilled out my motor cooling jacket intakes/outflow nipples very easily. Thinking of doing the same with the ESC

[sammyha]

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