Aquacraft 45amp esc question

One question I had about the Aquacraft 45amp ESC. Does that require any type of programming card? Since we started running it the throttle is a little different that what we are used to. It's almost like a two step accellaration process. When you hit the throttle the motor/prop spins about 25%, and then in a few seconds the rpms climb into the normal operating range. Sometimes if we stop out in the lake somewhere and try to start again we get very slow idle, and after a few trys of holding down the throttle we can get going again. This is a used unit powering a 3000kv motor with 8.4V nimh 5000mah pack on a Shockwave 26 surface drive.

No programming on that ESC.

Is it the new one thats all encapsulated, or the one with the blue heatsinks?

Attachment 132984

Heres your problem...

"Input Voltage: 12-14 NiMH, NiCd cells"

Product specs from back of header card. So are you suggesting I am having issues because I am only running 1 - 7cell pack?

Attachment 132987

Exactly. Later versions ( actually current version-60amp ) will only arm if supplied with 4s which is 14.8v.
Your voltage is too low between 1-7 cell for the ESC to arm.

Sent from my D6708 using Tapatalk

Well I'll be a son of a gun. Should I think about replacing that ESC then, because there is no room to run two batteries in my kids Shockwave 26........
I mean it runs, but it's kind of a pain in the neck whether we can get the boat to actually go full throttle again. Is that potentially hurting it's overall performance capabilities?

If your going to replace it consider one of these.

http://www.hobbyking.com/hobbyking/s..._Boat_ESC.html

Inexpensive and more gooder than the AQ. It's a technical term.

Or one like this
http://www.offshoreelectrics.com/pro...eaking-120a-v3

More gooder, you're talking my language.

In theory there isn't anything wrong with that AQ esc right? I could save it and use it for another build, one where I could utilize two batteries, I would just need to make a parallel wiring harness right?

I like step 7 in the instructions warning not to use with liposs and yet in the specs it says input voltage 4 cell lipo. Confused much lol

Either that or run it on a 4 cell lipo pack.

I have to add in the LVC to safely stick with the AQ esc, so that's $20 plus the cost of a 4s lipo pack $55 I might as well just get a new ESC. On 4s I would be turning 44k rpms too, not sure that's a good idea for the Shockwave. That Turnigy Marine listed above is on Backorder though.....grr

3s would be about 33k rpms, might be more manageable, not sure what her manners would be like on the water or what prop size I could run.

But a new ESC for the shockwave and use the AQ45 for another build using a 4 cell lipo pack instead of 2 NIMH packs. The AQ 45 amp ESC and Proboat 1500 motor on 4s is a good setup in a 26 - 29 inch boat.

Quote:

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Originally Posted by Tamelesstgr

3s would be about 33k rpms, might be more manageable, not sure what her manners would be like on the water or what prop size I could run.

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I'd say about 37mm

That's interesting thought because I will be doing a build for my younger son soon maybe next season when he has more driving experience. I've been wanting a BBY mono.

For what it's worth I was running the AQ2030 with the 50amp AQ ESC and 11.1 50c 5000 in mine before I got the new version and it moved well and was a good set up for a newbie. plenty run time and about 29 - 33mph. forgot what prop though. 2 cents worth The hobbyking ESC t,s davis suggested are great in the SW26 for real fun speeds!

In 2 weeks I am on vacation with the family, I plan on doing some through testing. Baseline with the 8.4 nimh, then a 2s, and my 3s pack is coming today. I've got to collect a lot of information because I believe it will help me understand all these parameters and how it equates to either speed or overloading the setup. I'll be doing GPS Speed and temps as well. GT Watt meter just arrived so I can get actual run max measurements versus the Hobby King unit I have that only shows bench testing or dropping the boat in a tub.

Attachment 133657

No, actually it has more to do with the motor & hull\boat design...

1. - it's a 2-pole BLM, they take a couple seconds to wind up.

2. - I too have one of these boats setup in a very similar manner. Starts off with the nose way up in the air, starts leveling off, then gets on plane, then takes off like a jack rabbit. Mine has a 2000Kv 2-pole motor running on 3S with a Seaking ESC (7.5-degrees timing).

Get on You Tube & check out vids of the SW26 version-3's... NOT THE GREEN ONE's - these one's... http://www.proboatmodels.com/Product...ProdID=PRB0650 - they're rebadged \ relabeled \ re-marketed \ re what-ever you want to call it Impulse 26's... http://www.horizonhobby.co.uk/marine...mpulse_26.html - originally designed to run a 550 brushed motor.

Maybe, just maybe the prop might be a bit too much for his setup. The factory prop on these boats is a plastic Prather S215 - 40.6mm dia x 2.5" pitch. Maybe, just maybe, he should try a x440 or x442 - CNC or S&B Octura, his choice.

FYI: Travis is running a CNC x443 on his green 60mph rocket ship.

Quote:

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Originally Posted by Doby

Heres your problem...

"Input Voltage: 12-14 NiMH, NiCd cells"

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I plan on some sharpened and balanced props once I am done gathering data on the various 1.4 pitch plastic props I have. Want a good understanding of what works well before plunking down $ for a custom prop.

Tim,
The 45-amp version doesn't need 4S to arm correctly - the 60-amp version does because it has built in LVC & stutter bump.

I used one of the 45's in a boat years ago, single 7-cell NiMH pack armed it just fine & the boat ran fine. 15+ mins runtime no prob. x442 prop.


Terry,
The version-2 Turnigy's are disco'ed just like there Seaking brothers. Everything is V3 now unless you shop the forums for a V2.

Included links are dead BTW...

Quote:

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Originally Posted by tlandauer

Exactly. Later versions ( actually current version-60amp ) will only arm if supplied with 4s which is 14.8v.
Your voltage is too low between 1-7 cell for the ESC to arm.

Sent from my D6708 using Tapatalk

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Quote:

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Originally Posted by RCBoaterGuy

Tim,
The 45-amp version doesn't need 4S to arm correctly - the 60-amp version does because it has built in LVC & stutter bump.

I used one of the 45's in a boat years ago, single 7-cell NiMH pack armed it just fine & the boat ran fine. 15+ mins runtime no prob. x442 prop.
..............

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This was for the SV27R as far as I can remember and the spec says input between 12-14 NiMH...... Most of the owners of that boat at that time if not running lipo batteries would have used either 12 or 14 cell packs of NiMH.
I am glad that it worked for you with 7 cell.

Just a quick update, running 3s lipo I have not encountered any further issues, pretty much always moves with throttle blip. Still a little bit of a step with lower rpm then into the full range, but acceptable.