ProBoat UL19 Stock Electronics hits 77.1 mph!

[sammyha]

This feels like I'm pushing the limit on the fastest speed for a ProBoat UL19 running on stock electronics. Had to drive this one, she was pretty loose...

https://youtu.be/T6gKlq-mmg4

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[Notoriousone]

Nice run, she looked stable and smooth.. 77mph is great speed with stock electronics, what prop were you using?

[sammyha]

Nice run, she looked stable and smooth.. 77mph is great speed with stock electronics, what prop were you using?

Thank you. It's an ABC 1716-17-45(2) CLL that I prepped...

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[paulejr]

Hmm. I have one of those (mine is SS, bal, polished and sharpened) and only got 58mph on 6s. OSE has them listed by only similar to the
ABC.

ProBoat UL-19, Veles 29, & Miss Geico Zelos propeller
Similar to ABC 1716-17-45 prop.
Diameter: 43.1mm (1.70") diameter
Pitch: 1.6 pitch
Material: Stainless steel

[sammyha]

That's the prop I'm using. Also the prop DasBoata will recommend and sell for this boat. The prop is a huge part of going fast.

I find it interesting that only two guys have broken seventy plus with this boat on stock electronics, MrMad2424 and myself. I haven't seen anyone else do it on YouTube anyway.

The setup is the bigger part of it imo. Just bolting on a well prepped prop won't get you there. I think this hydro in particular is proof of that.

And why keep secrets? You still have to put in the time, tuning and running, rinse and repeat. But, when you figure the setup out, it's very repeatable, evidenced by me posting a 77.1 mph pass on the third time out this season.

The last part is horsepower. Good lipos...

Anyway, I posted a video showing in detail my setup. This setup should get you north of seventy. After that it's the small details, CG, turn fin alignment, cutting down the turn fin, clean running conditions, both water and air. Trimming the boat with an ever so slight right turn (that's away from the left side torque lift). Driving the boat.

And... "Incremental changes from known settings".

It took me four years to get here...

Here's the link to my 76mph setup video. Was the same setup that I ran on consecutive days, with a slightly longer fully pinned run at the very end to lay down a 77.1 mph pass...

https://youtu.be/xzFhd7JrYZI

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[Bande1]

I have the dynamite 3831 in my blackjack 24 with a OSE raider 150. Motor runs hot going 55mph with a 38mm 1.4 tfl prop on 0 degrees of timing. So 77mph is doing something very right.

[sammyha]

I have the dynamite 3831 in my blackjack 24 with a OSE raider 150. Motor runs hot going 55mph with a 38mm 1.4 tfl prop on 0 degrees of timing. So 77mph is doing something very right.

Thank you. Running wet will run hot

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[Bande1]

this is an action shot of it. would you consider that wet running?

356236474_648384520656030_4241124585239376442_n.jpg

356119806_648385027322646_1543352357352170231_n.jpg

[sammyha]

this is an action shot of it. would you consider that wet running?

[ATTACH=CONFIG]177363[/ATTACH]

[ATTACH=CONFIG]177364[/ATTACH]

Definitely not wet

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[Bande1]

its accelerating out of a corner in those shots but it was pretty bow high nominally. I might have had 3.5 degrees with like 125f motor temps.

[Notoriousone]

I agree Sammyha, it annoys me when people try to keep their setups secret.. No one is making millions of dollars from doing this, so what is the point..
I love my UL-19 stock, but I had to change the electronics out.. I couldn't run 6s on it for more than a minute without things getting stupidly hot. At first I went with a 4074 2000kv motor and a Seaking 180, running on 6s. The boat ran well but I still wanted more from it, so a couple nights ago I switched to a 4082 motor with 1650 kv and a 200 amp esc, and I'm gonna run it on 8s.. It has the OSE HD flex cable in there so it should be strong enough for 8s, and I'm going to run a smaller prop, a 42mm.. I think the lower KV and smaller prop will allow 8s speed without excessive heat. The maiden run with this motor and esc will be tomorrow, so hopefully soon I'll have video of it hitting at least 80 or 85mph hopefully

[sammyha]

I agree Sammyha, it annoys me when people try to keep their setups secret.. No one is making millions of dollars from doing this, so what is the point..
I love my UL-19 stock, but I had to change the electronics out.. I couldn't run 6s on it for more than a minute without things getting stupidly hot. At first I went with a 4074 2000kv motor and a Seaking 180, running on 6s. The boat ran well but I still wanted more from it, so a couple nights ago I switched to a 4082 motor with 1650 kv and a 200 amp esc, and I'm gonna run it on 8s.. It has the OSE HD flex cable in there so it should be strong enough for 8s, and I'm going to run a smaller prop, a 42mm.. I think the lower KV and smaller prop will allow 8s speed without excessive heat. The maiden run with this motor and esc will be tomorrow, so hopefully soon I'll have video of it hitting at least 80 or 85mph hopefully

Whoa! That will be crazy fast...
And yes, this is something we do for fun. For most of us anyway...

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[Xrayted]

its accelerating out of a corner in those shots but it was pretty bow high nominally. I might have had 3.5 degrees with like 125f motor temps.

125F for a brushless motor is cold. They aren't considered running too hot until you are crossing 212F/100C range, and the same applies to the ESC.

It's no different than a car engine. You wouldn't put your hands on the exhaust manifold after driving it because you would get burned, but that doesn't mean the car is running hot. Humans hands are terrible at determining what is "hot" as far as our electronics go. Most humans will instinctively pull back their hand within a second or so on an object that is about 140F, which again is a perfectly normal temp range for our electronics.