Neu 1515/1Y ampdraw?

[bjornar]

Hi,

I am building a Mystic 84cm with twin 1515/1Y and am wondering if my Hydra 120 will be powerfull enough? I am planning on starting with Propshop 3514/4.

Regards
Bjørnar

[bjornar]

Anyone have any idea about this?

[D. Newland]

I believe the prop isn't very well known regarding it's amp draw. What cells are you going to use and how are you going to wire them to each motor? Voltage? mAh capacity?

Generally, a Hydra 120 is a little thin for a 1515 1Y. That motor can easily be pushed beyond a 120's limits. However, if your boat is propped correctly, they will work.

If I were to use a pair of 1515 1Y's for a dual project that measured approx 36 inches in length and wanted to use Hydra 120's, I'd use a 40mm or smaller in diameter prop and a 2 blade. Something along the lines of a pair of Octura left and right rotation X442/2 blades and I'd shave them down to 40 mm. Each motor would see 4S and 5000 mAh's.

[bjornar]

I believe the prop isn't very well known regarding it's amp draw. What cells are you going to use and how are you going to wire them to each motor? Voltage? mAh capacity?

Generally, a Hydra 120 is a little thin for a 1515 1Y. That motor can easily be pushed beyond a 120's limits. However, if your boat is propped correctly, they will work.

If I were to use a pair of 1515 1Y's for a dual project that measured approx 36 inches in length and wanted to use Hydra 120's, I'd use a 40mm or smaller in diameter prop and a 2 blade. Something along the lines of a pair of Octura left and right rotation X442/2 blades and I'd shave them down to 40 mm. Each motor would see 4S and 5000 mAh's.

Thanks for answer. I am planning to use 4S about 5000mah. Do you mean how long the wires will be? The Propshop props are 35mm but of course 4 blades. maybe I should start out with a 2 blade? Or maybe try to get more powerfull esc`s.

Why does not people know the propshop props so well? there very nice props

[vvviivvv]

[/QUOTE]
Why does not people know the propshop props so well? there very nice props[/QUOTE]

I know! theres so many of them aswell

[D. Newland]

Is the Mystic a catamaran?

Do you already have all of this gear?

What are your speed and runtime goals?

What's your budget?

[bjornar]

Is the Mystic a catamaran?

Do you already have all of this gear?

What are your speed and runtime goals?

What's your budget?

Yes, MHZ Mystic 84cm is a catamaran.

http://www.mhz-powerboats.com/shop/shop.htm?lade=artikel3786.htm

Yes, I do. But I am concidering if I should get new esc`s, but I prefere not...

To begin its for sportsdriving, but I hope about 50mph and closer to 10min. And maybe try 5S later, but then I should probably get new esc`s first..?

When it comes to budget I really dont have any. I had a lot of the equipment from before (motors, esc`s...) My main goal is to get a nice running cat. But I dont like to pay more than I have to... :P

[D. Newland]

I really don't think your 35 mm props are the way to go with that size of boat. Even the 40 mm 2 bladers I recommended above may be too small for that hull, but having duals will help.

I'll stick with what I recommended above, but shoot for 45 mph and runtime about 3 min 30 seconds with each motor seeing a very good 4S 5000 mAh pack. I think your Castle 120's will be fine if you've got this boat setup and running correctly.

You'll need Castle 240 ESC's if you go with 45mm or 47 mm props, and your runtime will drop to about 2 minutes.

[Ub Hauled]

On that note, I'd recommend using 4s2p...
the hull definitely has the room and could use the extra juice.
35mm props I believe are too small, I'd go with the suggested
442 worked down or even a 445... you'd need a bigger ESC though.
The above suggestions would be based on a 4s2p battery setup, specially
if you want longer run times.

[andym]

1515 1y are a very strong motor and can run a 47mm prop all day long. The size of this hull will need a large prop to move it efficiently and with twins it should rock !! I agree Jan that 4s 2p is the way to go and CC240's would be the goods

[bjornar]

On that note, I'd recommend using 4s2p...
the hull definitely has the room and could use the extra juice.
35mm props I believe are too small, I'd go with the suggested
442 worked down or even a 445... you'd need a bigger ESC though.
The above suggestions would be based on a 4s2p battery setup, specially
if you want longer run times.

Thanks for the feedback. What do you mean about 4s2p?(have to ask to be sure...) typical 2 x Lipo 4s 3000mah+ on each motor? And when it comes to esc`s, what will you recommend? Will there be any news from CC before the summer, thinkin about ICE?

[sailr]

two 1515/1y's only a 33" hull seems like extreme overkill! A single 1515/1Y should push it into the 50mph+ range! BUT, you're going to need a 200+A ESC to be on the safe side.

[bjornar]

two 1515/1y's only a 33" hull seems like extreme overkill! A single 1515/1Y should push it into the 50mph+ range! BUT, you're going to need a 200+A ESC to be on the safe side.

ok, so I should get new esc`s to be on the safe side. I dont want any accidents :P
But I still wonder what esc thats "best for the buck". I feel the Hydra 240 is a litle old, and maybe CC will come with something new very soon. Or maybe I should go for the new from AS.

[Anbjorn]

Bjørnar,
Why dont you try these?

http://mgm-compro.com/index.php?tid=brushless-speed-controllers-for-race-boats-16025-3-race-boat-e-series

Anbjørn

[bjornar]

Bjørnar,
Why dont you try these?

http://mgm-compro.com/index.php?tid=brushless-speed-controllers-for-race-boats-16025-3-race-boat-e-series

Anbjørn

Looks OK, but does anyone have any experience with it? How is it against CC and AS?