what motor for a 12s mono?

[Mattwarner]

Hi guys, i have a 46" mono coming shortly and as all my other smaller boats run 6s it makes sense to build this around a 12s setup.

its a deep V mono and i have thought about twin 4074's or outrunners on 6s each but have heard mixed things about the handling issues of twins although i really like the idea (and look!) of it!

If i go single it will likely be a 56 series Leo or TP but what about this from hobbyking? or would the kv be too low? Also would i get better run time with a single 12 or twin 6s?

thanks in advance!

[Mattwarner]

Anyone?

[znus]

Im by no means an expert but to my ears your 46" hull is too much for twin 4074's. It will surely move but its money better spent elsewhere, like on a single setup. Im pretty much in the same boat (lol) as you, running 4s and 6s and currently looking for something exciting to put in my 36" cat. In your case, with a v-hull, you can fit a 56xx low and have a good setup. On 12s you should get something around 650-750 kv and then try too keep it on the surface. It will fly! And there's always the bigger Neus, like 1527 & 1530.

If you still wanna go twins, and get the most bang for the buck, you might wanna consider two of HK's 3994 850kv. A bit too much rpms on 12s but they will get that 46" almost to warp 8, at the very least. Although the revs are high I'm thinking you could put decent sized props on them, since they are two helping eachother.

I'm checkin the HET Typhoons out. Take a look at (google) the 700-98 and tell me what you think?

Can't help you with the outrunners. Im cheap and don't have the energy (or skill) to make custom made motormounts etc. Not sure they will need it but I can't imagine they will fit in a "standard" motormount.

[Make-a-Wake]

For an inexpensive alternative to Neu's or the Castle 2028, I would run the 5692 540kv for 12s and a large higher pitched prop like an Octura x560 or Prather s250.......................

http://www.offshoreelectrics.com/pro...o-5692&cat=148

http://www.offshoreelectrics.com/pro...?prod=oct-x560

http://www.offshoreelectrics.com/pro...i-prather-s250

[Mattwarner]

I've put my name down for a leopard 5682 730kv would this be ok for 12s or should I drop down to a 540kv?

[jkr]

Just thing.
The TP are 6 pol motor on 56xx.
If i was you i go for TP 5692 820kv or 800kv or 880kv and depend of the hull

[Mattwarner]

Ben has the leopard 5692's for $100!

[Fluid]

The OP can do whatever he wants, but he'd be advised to listen to folks who have actual experience with large monos. We have a bunch in our club. No offense guys, but there are some pretty bad recommendations above. For 12S an 800-880 Kv motor is looking for trouble - cooked ESC and packs. I'd recommend a large single with a Kv around 550-650. That will give reasonable rpm and amp draw, and very good speed with decent packs.

A large outrunner might work, but IME most are overtaxed in large boats. We have no experience with the 5692 motors, they may work fine. The Castle 2028 is perfect for 10S but the Kv is a bit too high for 12S. Large monos are not cheap to build if you want reliability and performance. Without either the project will not be very satisfying. Remember, cheap, fast, reliable: choose any two.



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[jkr]

Ben has the leopard 5692's for $100!

What kv?

[Mattwarner]

The OP can do whatever he wants, but he'd be advised to listen to folks who have actual experience with large monos. We have a bunch in our club. No offense guys, but there are some pretty bad recommendations above. For 12S an 800-880 Kv motor is looking for trouble - cooked ESC and packs. I'd recommend a large single with a Kv around 550-650. That will give reasonable rpm and amp draw, and very good speed with decent packs.

A large outrunner might work, but IME most are overtaxed in large boats. We have no experience with the 5692 motors, they may work fine. The Castle 2028 is perfect for 10S but the Kv is a bit too high for 12S. Large monos are not cheap to build if you want reliability and performance. Without either the project will not be very satisfying. Remember, cheap, fast, reliable: choose any two.
.

Thanks Fluid,

I have ditched the idea of twins and going single, I have the option of 730kv or 560kv in the leopard motor 5692 motor range, would you suggest i drop down to the 500kv range? I am not after SAW setup just sport running 50-60's so cheap (ish) and reliable are my choices for running this, the only reason i am going 12s is that i have 10 3s packs and feel HV would be the way to go in this mono rather than high amps and a 6s2/3p setup but all advice is welcomed.

[Prop-a-Gator]

What kv?

He has 4 Leopard 5692 540kv and 2 TP 5692 540kv in his "garage sale".

[Anbjorn]

I think you should listen to Mr. Fluid's advice here.
Here is an example that I have tried.
875KV motor
12S2P
41" Mono
S/B x463 prop (P265 slightly modded)

Current during:
Acceleration: 500Amp easy (580A)
Full speed: 200Amp + (220A)
Speed measured with 2 onboard GPS units: 84mph (88mph and very unpredicable behaviur)
BR
Anbjørn

The OP can do whatever he wants, but he'd be advised to listen to folks who have actual experience with large monos. We have a bunch in our club. No offense guys, but there are some pretty bad recommendations above. For 12S an 800-880 Kv motor is looking for trouble - cooked ESC and packs. I'd recommend a large single with a Kv around 550-650. That will give reasonable rpm and amp draw, and very good speed with decent packs.

A large outrunner might work, but IME most are overtaxed in large boats. We have no experience with the 5692 motors, they may work fine. The Castle 2028 is perfect for 10S but the Kv is a bit too high for 12S. Large monos are not cheap to build if you want reliability and performance. Without either the project will not be very satisfying. Remember, cheap, fast, reliable: choose any two.



.

[jkr]

He has 4 Leopard 5692 540kv and 2 TP 5692 540kv in his "garage sale".

In that case i would go for the TP as they are 6pol.
But you can see here a 6s2p at 54mph

http://www.youtube.com/watch?v=gW5NQgbWeKQ&feature=plcp

[Mattwarner]

Thanks,

I think i will change to the 540kv, will a 300a Fightercat ESC be ok? and any recommendations on prop size to start off with again reliability is more important that speed

[jkr]

I think you should listen to Mr. Fluid's advice here.
Here is an example that I have tried.
875KV motor
12S2P
41" Mono
S/B x463 prop (P265 slightly modded)

Current during:
Acceleration: 500Amp easy (580A)
Full speed: 200Amp + (220A)
Speed measured with 2 onboard GPS units: 84mph (88mph and very unpredicable behaviur)
BR
Anbjørn

With what motor?