UL-1 goes for about 20 ft, then stops dead in the water

[jingalls007]

I put a new prop on, hauled ass for 4 batt cycles, then today went out again but after about a minute it stopped. Switched back to the stock prop, same thing, just stopped. Bring the boat in to re-arm and it will just do the same thing. Anyone got any ideas as to what may be causing this? Strut depth/Angle?? thx

[alvinsmith75]

Check the cap on ESC

[jingalls007]

Check the cap on ESC

no issue with the cap that i can see.

[properchopper]

Exactly what happened to me. I had another UL-1 SC that was in another boat & swapped it in, and it ran fine. You have a bad SC. Also happened to another racer at WW V. Same thing. Put in another SC & all was OK. Send to Hobby Services & get a new one from them. [ they claimed it there was nothing wrong with mine; yeah, it runs on the bench but twenty feet in the water, then nothing !]

[jingalls007]

Exactly what happened to me. I had another UL-1 SC that was in another boat & swapped it in, and it ran fine. You have a bad SC. Also happened to another racer at WW V. Same thing. Put in another SC & all was OK. Send to Hobby Services & get a new one from them. [ they claimed it there was nothing wrong with mine; yeah, it runs on the bench but twenty feet in the water, then nothing !]

This would be the second time I have to send back an ESC to them. The first one didn't work out of the box and I had to wait 2 weeks for them to send out a new one. back to Hobby Services, again.. thanks for the help.

[Ub Hauled]

also check the Rx/Tx batteries...

[properchopper]

This would be the second time I have to send back an ESC to them. The first one didn't work out of the box and I had to wait 2 weeks for them to send out a new one. back to Hobby Services, again.. thanks for the help.

I now run an old CC80 watercooled with an Etti cap board. No more issues.

[properchopper]

also check the Rx/Tx batteries...

Its a BEC SC good buddy. The UL-1 SC likely has issues.

[jingalls007]

also check the Rx/Tx batteries...

that was the first thing I did, then the cap.

[jingalls007]

So Hobby Services is sending me another ESC, this would make SC #3 for my ul-1. its nice to know that even though there have been issues with this boat, they are stepping up to the plate to make it right.

[Steven Vaccaro]

You didnt say if you were running lipo or nimh. If it was nimh it could possibly be a bad pack.

[jingalls007]

You didnt say if you were running lipo or nimh. If it was nimh it could possibly be a bad pack.

Two brand new maxamps 5250 30c 2s. It's an issue with the ESC, they are just sending me out a new ESC, didn't even want the old one cause they know of the issues.

[detox]

You never stated what new prop you bolted on. My large detunged x645 caused my UL1 to shut down. Now I use the smaller Grimracer L38x55...boat is fast and never shuts down.

[jingalls007]

You never stated what new prop you bolted on. My large detunged x645 caused my UL1 to shut down. Now I use the smaller Grimracer L38x55...boat is fast and never shuts down.

I used the same prop as you but checked motor, battery, and ESC temps and all temps were fine. I ran the boat with the X645 quite a few times with the same low temps every run. Then it shut down, brought it back in, put on the stock prop, re-armed SC, same thing. SC would arm, but wouldn't go for more then 20 feet or so even with the stock prop.

What is your strut depth with the L38X35? I bought the grim 30x57 but couldn't get the boat on plane for the life of me even with suggested strut depth and prop angle.

[detox]

Boat handles fine with strut set 1" from bottom of strut to hull bottom. My boat also likes the size and weight of the older Flightpower 25c 4900mah lipos (weight 240 grams). Going with a lipo lighter in weight than 240grams each makes my boat loose unless I go deeper on the strut. Your prop needs to be sharpened in order for it to get on plane faster and go faster.

[jingalls007]

Ill re-sharpen the 30x57 and see what happens, thanks for the info. maybe I'll try the L38x35 as well.

[detox]

Grimracer L38 X 55 or hotter L38 x 63 will work.

[jingalls007]

what speeds are you seeing with the 38x35?

[detox]

I do not know...low fourties maybe. Speeds are faster than using the stock plastic prop. btw the prop is a L38 X 55

[jingalls007]

I do not know...low fourties maybe. Speeds are faster than using the stock plastic prop. btw the prop is a L38 X 55

aixelsyD (Dyslexia) gets me every time!

[FoxProGT]

would i have to call aquacraft to get a replacement esc if mine is bad?

[nate]

would i have to call aquacraft to get a replacement esc if mine is bad?

I had one of my old 45amp AQU esc's that blew up due to being a dumbass.. haha happens when your learning , anyways I was being truthful with the tech and told him I thought I may have ran the wrong motor with this esc, and it got hot, then caught fire lol, well he ended up sending me a brand new esc shipping covered and everything.

But if its a problem like this they will ask you to send it in...

takes about 4 days to get the new esc in after they recieve your old one..

I had the same problems with the 60amp esc..

[nate]

By the way, My 60amp esc would run around 50 seconds and then just completly slow down to around maybe 20mph wide open..

I brought it in, and the esc was extremly HOT..

But I only ran 4s with the AQU 3-blade lifter...

I have a brand new 60 amp ESC never used ill sell ya for $70.00 shipped

[FoxProGT]

By the way, My 60amp esc would run around 50 seconds and then just completly slow down to around maybe 20mph wide open..

I brought it in, and the esc was extremly HOT..

But I only ran 4s with the AQU 3-blade lifter...

I have a brand new 60 amp ESC never used ill sell ya for $70.00 shipped

thanks for the info and offer but ima call them up tomorrow and tell them the situation and see if they will help me...if not ..well then...... what brand is that esc you got for sale? X)

[nate]

thanks for the info and offer but ima call them up tomorrow and tell them the situation and see if they will help me...if not ..well then...... what brand is that esc you got for sale? X)

Same 60amp that comes in the UL-1. Brand new never used.