Venom/Atomik New 58 Inch Electric Catamaran

[Brushless55]

The goal was to get the most out of these components while not stressing them. At most its pulling about 100amps continuous, through the 120 amp esc. The motor itself typically comes off the water at 130 F or less after heat soak. Motor not stressed, ESC not stressed, and even the cheap 25C packs aren't stressed.


Paul Susbauer
Product Manager
Atomik-RC

the site claims 2000watts, and that pretty cool!
2000watts / 6s = about 90amps
most said to pull is 100amps continuous = about 2200watts, sweet!
runtimes @ 90amp cont. = 2.67min
@ 100amp cont. = 2.4min

no one on these forums I now of runs 25c 5000mah packs pulling 90-100amps cont
that would = some hot lipos and under powered and or stressed electronics

someone on this forum or another talked about long or good runtimes with this cat...
just sharing my thoughts

Hey guys,
Its been a while since my last post and having read this thread so far I'm reminded of why I have not posted in so long.


@ Brushless 55
Yes by your math if you held the throttle wide open until the pack quits you would have a couple minutes of runtime. I dont refute that but in practice when you drive an RTR like this and back off in turns and drive it around we get 5-7 minutes or more. If you add more capacity you will get longer runs over 10 minutes. The 6S pack, ESC and motor temps all come off well under our safety limits or we would have not released this product.

Chris

Just going by what Paul said about 100amps cont.
can't this hull take WOT turns?
not sure how someone can more that double the runtimes by slowing a bit in the turns and yet WOT on the straights?
but 5-7min rutimes on 5000mah packs = 34 to 48 amps cont. or about 755 to 1065 watts
just trying to figure out the 2000watts that's being advertised by venom, because that's still only about 2.7min of runtime

Just got mine yesterday

post some pics for us!

Hi all. I'm a new Venom dealer and got a couple of the ARC's in last Friday. Ran the snot out of them all weekend! Out of the box they work fairly well. I think it will be a hit with the weekend warrior crowd. COG is a bit high with the stock battery location, I'm going to run two batteries and move them to the sponsons. I'll let everyone know how it works out. I'm also working on changing the motor out for something in the 500KV range and plan on running 12S. This big boat definitely needs more power than the stock electronics can provide. Overall I'm very pleased with the package Venom has put together and hope this boat is a sign of what is to come.

hey welcome to OSE bro!
snap some pics of your Cat for us, and please keep us posted of the 12s rig

[Chris Nicastro]

Again if you are racing it WOT for the entire pack and not letting off then the load will be X and the run time will be Y. As we have driven it and other have as well we are experiencing longer run times than your math predicts. The load varies by throttle input and water conditions so unless your running on a perfect lake and WOT you will see the shortest run times. We test in all weather from calm to 15-20mph winds and 4-6in choppy water, best to worst case, to see how things go. The boat can handle all of that and the run times vary as such.
Also this is a scale style hull (narrower) not a hobby race hull (wider) so you should drive this hull with that in mind, that is why you back off entering a corner and power out of the corner. You can set the hull up to drift through a corner on power if you understand boat set up.

[Brushless55]

Hi all. I'm a new Venom dealer and got a couple of the ARC's in last Friday. Ran the snot out of them all weekend! Out of the box they work fairly well. I think it will be a hit with the weekend warrior crowd. COG is a bit high with the stock battery location, I'm going to run two batteries and move them to the sponsons. I'll let everyone know how it works out. I'm also working on changing the motor out for something in the 500KV range and plan on running 12S. This big boat definitely needs more power than the stock electronics can provide. Overall I'm very pleased with the package Venom has put together and hope this boat is a sign of what is to come.

wonder what the real Watts of this system are

Again if you are racing it WOT for the entire pack and not letting off then the load will be X and the run time will be Y. As we have driven it and other have as well we are experiencing longer run times than your math predicts. The load varies by throttle input and water conditions so unless your running on a perfect lake and WOT you will see the shortest run times. We test in all weather from calm to 15-20mph winds and 4-6in choppy water, best to worst case, to see how things go. The boat can handle all of that and the run times vary as such.
Also this is a scale style hull (narrower) not a hobby race hull (wider) so you should drive this hull with that in mind, that is why you back off entering a corner and power out of the corner. You can set the hull up to drift through a corner on power if you understand boat set up.

what is X?
we are being told 5000mah 25c packs are more than enough for this boat at WOT
and we were told that is 100amps cont.. if so 25c won't cut it

lots of racers including myself understand the water conditions effects how a boat runs and the loads on the esc/motor/batteries

from your postings this boat can't take WOT turns so now in this thread we are reading two different out comes of this RTR
plus runtimes are more than doubled for letting off in the turns??

only posting some thoughts that I have and possibly others as well

I want a big cat

[EricSchlaifer]

I modded the coupler today to fit the 6mm shaft. I'm going to run a Scorpion 500kv outrunner in it. I'm having trouble locating a suitable HV ESC stateside. If anyone has some recomendations I would love to hear them!

Here it is the day I unboxed it




I just ran today with a bit more positive thrust, finally got the boat to ride on the rear pad. I will try to get someone to take some video of it the next time I'm out so everyone can see it running.

[Brushless55]

Eric, thank you for posting those pictures..
have you tried fightercat racing?
he has lots of HV escs to choose from..
any idea what your CG is at?
thanks

[forescott]

When you say positive thrust, do you mean the angle of the strut?

[EricSchlaifer]

Eric, thank you for posting those pictures..
have you tried fightercat racing?
he has lots of HV escs to choose from..
any idea what your CG is at?
thanks

No problem!

With the battery in the stock location its roughly 19 inches. I think it would probably be better around 16-17". I expect that running a 12S configuration will improve it (since the batteries will be in the sponsons).

[EricSchlaifer]

When you say positive thrust, do you mean the angle of the strut?

Haha, yes. I didn't realize how awkwardly I worded that until I just reread it.

[Brushless55]

No problem!

With the battery in the stock location its roughly 19 inches. I think it would probably be better around 16-17". I expect that running a 12S configuration will improve it (since the batteries will be in the sponsons).

I think this hull is 55" so that puts you at about 35% right now..
and 16.5" puts ya at 30%, and that would possibly work better like you are thinking

[EricSchlaifer]

I think this hull is 55" so that puts you at about 35% right now..
and 16.5" puts ya at 30%, and that would possibly work better like you are thinking

Yea, its 55". I have already pulled the motor out of it to start the conversion for 12S. My friend has one as well and will be running 6S until he sees mine completed. I plan on running two 6s packs in parallel in the next few days so I can play with the CG and strut angle on his ARC. I realize most people who purchase this boat probably will stick with the stock electronics for awhile and I want to be able to recommend a good handling starting point.

Just took a peak over at fightercat and that 16S 300amp ESC looks to be just the ticket!

[Brushless55]

Yea, its 55". I have already pulled the motor out of it to start the conversion for 12S. My friend has one as well and will be running 6S until he sees mine completed. I plan on running two 6s packs in parallel in the next few days so I can play with the CG and strut angle on his ARC. I realize most people who purchase this boat probably will stick with the stock electronics for awhile and I want to be able to recommend a good handling starting point.

Just took a peak over at fightercat and that 16S 300amp ESC looks to be just the ticket!

I would try this motor as I think it's near the same as stock but a different wind at 720kv and great for 10s runs
and only 55bucks

http://fightercatracing.com/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=321&category_id=11&option=com_virtuemart&Itemid=1

[EricSchlaifer]

I have to check the mount spacing in the morning, but that looks very nice. I also noticed there is a 520kv version as well. That's a way cheaper option than the 500KV Scorpion that I'm thinking of using. Thanks for the great suggestions!

I couldn't wait, just checked it will fall right in!

[Rumdog]

Get a fightercat hv esc

[EricSchlaifer]

Get a fightercat hv esc

Yea looked at those last night, they look perfect. The price is damn good too! Now I'm just torn over using one of the fightercat outrunners or the scorpion I was originally planning on using.

[Brushless55]

I have to check the mount spacing in the morning, but that looks very nice. I also noticed there is a 520kv version as well. That's a way cheaper option than the 500KV Scorpion that I'm thinking of using. Thanks for the great suggestions!

I couldn't wait, just checked it will fall right in!

Right on Eric
And I think the 1180kv version he sells is what comes in this boat (aka 1200kv)
And again only 55bucks