Need for speed

[Jesse J]

I am looking to get more speed out of my Delta Force 26, the BJ motor/esc is taking quite a bit to get my speeds up.

5S gets it about 37mph on GR4255 and X640 props. I am riding the limit on my amperage (see my data logger thread) and am thinking it may be time to switch to my Ammo 36-50-2300 Motor. I was thinking the Etti might be a good match and allow me to go faster? The only way I have gotten over 35 mph was on 5S...

What would you recommend for this motor? or would a different set up be better suited to this guy. It seems that this hull should probably not take more weight than the 4S (to keep it under 5lbs). The water just laps over the transom when still - I know, why have a FE in the water and not holding full throttle...

[D. Newland]

A properly set up Delta Force 26, BJ motor/ESC and an X645 prop should be in the low 40's on 4S and should be right around 60 amps on average.

Something doesn't seem right with your setup if you're only getting 37 mph on 5S.

What cells are you using?

[Jesse J]

they are the IP cells that say 5000 mah, 25C+ discharge... sposed to be killer packs. I will post data, but I was pulling about 60 amps average (75 amp spikes). I need to get to a little bigger pond for my GPS to register, but it hadn't gone up from the 35 mph from a previous run.

[ozzie-crawl]

try the ammo with a x440, and you can still use the b/jack esc

[Flying Scotsman]

A properly set up Delta Force 26, BJ motor/ESC and an X645 prop should be in the low 40's on 4S and should be right around 60 amps on average.

Something doesn't seem right with your setup if you're only getting 37 mph on 5S.

What cells are you using?

Something is wrong and has been stated the cells ? What ESC are you running and has it been programmed for 5s. You have stated a BJ ESC?

Douggie

[Jesse J]

Yes, Proboat BJ esc. It only has programming for lipo or NIMH. I may reprogram, but I think these are the limits of this set up. I highly doubt the cells are the issue, but can try others as well.

I will try ammo with same ESC, otherwise will try Xpower 100 until I get something more beefy.

[Flying Scotsman]

Something is wrong and has been stated the cells ? What ESC are you running and has it been programmed for 5s. You have stated a BJ ESC?

Douggie

There is your problem 5S on an RTR ESC

Douggie

[Jesse J]

Copy that. I will soon be stepping up the ante for this boat. Until then, I will stay with 4S and go big prop X445/645 for now.

I just got done swapping BACK in my BJ motor - that ammo after a bench test, started to feel grindy when I turned it? What does this mean? It still powers, but is definitely not free spinning like it was before I installed it.....

[properchopper]

I should have jumped in earlier & warned you against the Ammo. It's a fine motor for a small hydro, has lots of rpm, but lacks torque. I Roasted one in my VS-1, then put in a UL-1 motor [ read my recent post] and it ripped. The Ammo grinding is caused by the pole insulator getting loose from excessive heat and expanding outward and rubbing on the windings. see picture; a little out of focus but you'll get the idea. That happened to a UL motor I ran in 4-min offshore races and finally got too hot and loosened the insulator. El grindo, my friend ! It'll make a fine paperweight now
A UL-1 motor on 4S should get you where you want to go; don't go much bigger than a X642, 'tho.

[egneg]

Sounds like motor bearings are gone.

Edit - or the above.

[Jesse J]

Man, that sucks. It was just a little bench test! Must have been a bum motor? So UL-1 motor on what speedo? Same BJ speedy work ok?

[properchopper]

Actually, the first UL-1 motor let loose on the bench also, although the loosening of the insulator was likely cumulative prior to that. I've run it's replacement 4 times now with no probs to date. The BJ SC is a good one & may work OK. I'm using a Hydra 120 that I won at WW V so no issues so far. I like lots of SC headroom !

[ozzie-crawl]

i have been running a ammo in my mono for 7-8 months and it still runs perfect must have got a good one, iam about to put 2 in my twin motor cat, the bj esc's are underated, by the way isnt the ul1 motor a ammo as well

[andym]

Mate a 1512 2d and CC240 with a x440 will scare the hell out of 50, go on you know you want to.

[Fluid]

I simply fail to see the attraction of "bench testing" a BL motor. Nothing good comes of it, and damage is often the result. BL motors are not designed to run without a load, to do so will overheat them quickly, and overspeed them as well. Overspeed a cheap motor and the magnets can loosen and hit the windings. This is not a bad motor, it is owner abuse....

Just putting a proven motor, ESC and packs in a boat does not guarantee a fast boat. The install has to be done well, with good alignment between the motor and driveline and proper setup. Set it up to run too wet and speeds will be dissappointing. The BJ motor, ESC and decent 4S packs should see speeds in the 40s without excessive temperatures - if the boat is well set up. Poorly rigged - speeds will be low and amp draw high.


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