atomic 58 inch catamaran motor question

[cgd2175]

the Leopard LBP5692 is rated at 5500w, 35v with max amps 160A.
I know that watts x voltage= ampers
My question is if I use this motor in 6S(22.2v) the amp draw will be 247.74Amps?
5500w/22.2=247.74 is this the way to calculate the theorical Amp draw???

[Bri6672]

the Leopard LBP5692 is rated at 5500w, 35v with max amps 160A.
I know that watts x voltage= ampers
My question is if I use this motor in 6S(22.2v) the amp draw will be 247.74Amps?
5500w/22.2=247.74 is this the way to calculate the theorical Amp draw???

The load and kv play a big role in this, change the prop and the amps are going to change....

[cgd2175]

so the 5692 1090kv in 6S will draw 250amps minimum?

[Bri6672]

so the 5692 1090kv in 6S will draw 250amps minimum?

No way.... More like 110-130!!!! The 1100kv setup is only pulling 115!!!! The inrunner vs outrunner and pole count play a large roll but kv, voltage and prop are he main detirmining factor for amp draw!!!!

[cgd2175]

to determine the amp is not what I thought in this application: watts x voltage= ampers
I have a lot to learn,
How can the amp be figured out? for example...to know what batteries C rate to buy or to know what esc to use?

[Bri6672]

It's all about the load! The prop, weight of boat etc... All play a role!

[lenny]

Hey Rob do you need some batteries for the flash light or may be a bigger mirror ?

Ok hey you guys, It has been two weeks now.

So what the hell happen ?

Do you need a flash light and a mirror to look for the data, pictures, video's that Damen & Ken have ?

[Finest Racing]

Spoke to Damen today, he said he would upload the pictures tomorrow. I knew I should have used my video camera. Ken did the video. I will call Ken tomorrow to see when he maybe uploading the video's.

[Finest Racing]

That was how I was going to do it. Where did you get the coupler and what size is it??

Depending where you buy the Leopard motor, will depend on the size of the shaft. Offshore has the motor with a 8mm shaft if I remember correctly and the motor I bought had a 6mm shaft. Both motors are legit/authentic motors. I bought the coupler at Offshore.

[Bri6672]

Ok so I am going with an HET 700 98 1170kv. It is basically a copy of the Neu 1527 but a Better kv for 6s. Going with a water jacket and a rear mount clamp to support the 4"s of motor. This should be a good bump in performance but allow me to stay at 6s and get good run times with the 11600 mah I am running.

Boats are kind of a side thing for me hobby wise, I normally play with big 20-30 lb EDF scale jets and I have been running some HET motors pretty hard in jets the past 2 years and have had great success so I decided to give them a shot in a boat. I am going to make a new front mounting plate for the motor mount (if I can't modify the stock one) I am going to attempt to use the existing motor shaft coupler and drill out the motor end for the 8mm shaft if that dosent work we will just fab a new one

All the stuff should show up end of this week and I will post picks of the build and the performance via video, hoping for the upper 40mph range maybe touch 50 but still have the convience of just 2 batteries per run and a good run time (7-8min)

[lenny]

I went out today. It was low 60's here in south central NJ. Unlikely that we will see that again till spring. The Atomik had a glitch on the first pass. The water feed line came off going to the water jacket. The boat filled up with some water. Brought it in, fixed the line, topped off the batteries, watched Ken fly around with his Genesis.
Reset the GPS, secure everything and try it again. Off the work bench into the water the boat appeared to be on the money. I was using two 4s 6000, 25~50c Turnigy Nano Tech batteries. I know they are under in the C rating. Surprised after a 3 to 4 minute full burst straight away runs, the batteries were at 85 degrees, the motor was at 90 and the ESC was at 88 degrees.
With the GPS tuning off but recording the max speed before turning off due to low battery, I recorded a max speed of 59.3mph. I was a very smooth ride. Ken did the video and Damen did the still photos. When I receive them, I will post.
All in all, I am happy. No tweaking was done today. I just enjoyed it. I will now tweak it a little to see if I can hit the magic number that we think it can hit (70mph).
I did roll it, which landed right side up. I think after the first roll - the battery tray separated. The boat was leaning when accelerating from a stop. After moving it would level out. The problem was when I would release the throttle the boat get loose. The boat rolled two more times - always landing right side up. No other damage or problems to report.
I did use the data recorder. I will check that tomorrow.

I spoke to Damen, he is working on the pictures. I have not spoke to Ken yet. It has been crazy over here. It was my daughters birthday this week. I will be calling Ken tomorrow.
I will be checking the data tomorrow too.

I also use a GoPro using the head strap. Your head is always following your boat.

Spoke to Damen today, he said he would upload the pictures tomorrow. I knew I should have used my video camera. Ken did the video. I will call Ken tomorrow to see when he maybe uploading the video's.

Hey Rob do you need some batteries for the flash or may be a bigger mirror ?

I know may be next year we will see something.

W T F
Come on What's the facts 3.5 week and still no Data, Pictures, Or vids.

[Finest Racing]

I spoke to Ken and Damen today and we were talking about going out next week or the week after. We will not let the cold keep is away.

[Bri6672]

image.jpgOk so motor and parts all showed up today, the water jacket for the Neu 1527 seems to be a good fit for the HET motor.I need to drill out the motor end of the drive adapter from the 6mm stock size to fit the 8mm motor shaft. The bolt pattern of this motor seems very close to the stock motor mount so I might just try modifying the stock mount before going thru the hassle of making a new one. I'm going to try to get an amp reading with the stock motor first then compare it to the new motor.

[Finest Racing]

Be careful when drilling through the motor mount. The mount has water jackets. Even though you may not be using the water jackets you will weaken the structure.

[Bri6672]

Be careful when drilling through the motor mount. The mount has water jackets. Even though you may not be using the water jackets you will weaken the structure.

Yep, not my first rodeo. Most likely just bringing the pattern in a bit, atomik says its 28 and mine is 25 so not to far off...