Feigao 580L in a Mean Machine?

[Steven Vaccaro]

I would agree with Stephen's comment from Offshore electrics. I have several 540 XL's and they never skipped a beat. I just wanted a bit more power/speed which was the reason for the 580 L inquiry.

However, I did mount a Scorpion outrunner S4025-16 in a Mean Machine instead of the 580 L as a test. This Scorpion motor has a 6 mm shaft, runs 75 Amps, 2000 Watts continuous. It has 14 poles and wound in a 16 turn Delta configuration. BUT it's Kv is only 332. I machined a custom all copper motor mount with cooling for the Scorpion and I knew I could keep the temps low. I have a big HV ESC that will handle lots of amps so it was time to do some tesing with a few 2S, 40C, 5000 mA Lipo's.

The first test on 4s with a small prop did not even get the boat on plane. I remember one of the forum recommendations....Start Small and work your way up. I started real TINY and my Eagle Tree data monitor showed I was only drawing about 5 Amps. I put on a 56 diam 3-blade prop and it was just a tad better. I just did not have the RPM,s. I went up to 6 s and things started to improve a bit but the Amps were still really low. I put on a 678 stainless prop (78 mm diameter) and now things started to happen. I did not have the boat dialed in in terms of balance and thus did not open it more than about 1/2 throttle but it did move. (I did not have the GPS hooked up to the Eagle Tree at this time.) I was still drawing about 22 Amps, 408 watts and 3800 RPM. I was at about 20% capacity on the Scorpion (408 vs 2000 watts.)

If you look at the set up in the attached pics you can see I have an 8S set up...the next one to try after I get the balance under control. This could be exciting.

You will also see a unique mount I made on the top cowl. The aerodynamic mount supports a tiny video camera module I developed for another security project. It is in a titanium housing with glass optics and takes a full 640 x 480 pic at 30 fps. Memory is a 4 Gb micro SD card and power is a tiny single LiPo in the housing. Microphone, on/off button and blue status LED are mounted on the back. I hope to post ome onboard taken video if I can get this beast to really move............or maybe explode!

Some of us are playing with low rpm motors and it seems that the low rpm just doesn't spin a prop efficiently enough to get good speed out of the boats.

[DISAR]

This is the biggest prop I've seen on a Mean Machine! I agree that if your rpms are low whatever prop. you put the result will not change much. And with a very very big prop. there are prop.walk-torque problems. It is worth trying this motor and interesting for us, but if you are not happy with the result try a higher KV.
I am looking at Scorpion motors and there are some that could do the job around 1100-1400 kv

[Mel279]

It really depends on the wind. The lower kv motors can handle more volts. I have customers running the 580 12L on 8s.

thanks steven

[Rumdog]

WOW, Look at that prop!!

[Steven Vaccaro]

Is it just an illusion or did you have to tilt the rudder back to allow the prop to fit?

[DISAR]

I also wondered why the rudder is tilt back but it looks like this the reason probably.

[questtek]

Some of us are playing with low rpm motors and it seems that the low rpm just doesn't spin a prop efficiently enough to get good speed out of the boats.

I could not agree more with you! I pushed it to 8s with an ESC that would take
12s but it still did not give any where the performance I expected. I thought that this giant prop would offset the lower RPM's but it appears I was mistaken. That is the largest prop I could get on the upgraded flex shaft....any larger diameter and I would have had to move the rudder.

From a looks cool factor it gets high marks but once you start it up it's as disappointing as a VW engine in a Ferrari.

A recommendation was to go to 12 S. I have the LiPo for it but now the boat is starting to get a bit heavy...but it could be done. Right now it looks the 580L will be next up on my dance card. Unless someone has some recommendations!

Stephen, do you sell water jackets for them? I know the factory makes them.

[Rumdog]

I would go 11xl on 6s2p

[Brushless55]

I could not agree more with you! I pushed it to 8s with an ESC that would take
12s but it still did not give anywherethe performance I expected. I thought that this giant prop would offset the lower RPM's but it appears I was mistaken. That is the largest prop I could get on the upgraded flex shaft....any larger diameter and I would have had to move the rudder.

From a looks cool factor it gets high marks but once you start it up it's as disappointing as a VW engine in a Ferrari.

A recommendation was to go to 12 S. I have the LiPo for it but now the boat is starting to get a bit heavy...but it could be done. Right now it looks the 580L will be next up on m dance card. Unless someone has some recommendations!

Stephen, do you sell water jackets for them? I know the factory makes them.

a 580L would be awesome!

[questtek]

Is it just an illusion or did you have to tilt the rudder back to allow the prop to fit?

No. it was just on the workbench without the stand so it tilted up. I did not have to move the rudder at this diameter prop but any more and I would have.

There was so much force from the prop I had to tighten down the runner when running it. Evidently the prop was was enough to throw it up also.

I forgot to mention the torque on this prop is incredible. When I punch it one of the sponsons looks like it is waving!

[questtek]

Had the boat ready to run with an ESC rated at 12 LiPos and it smoked just at I took it off from the dock. Cause???? Since I have no more HV controllers I think it is time to shelf this outrunner project and get ready to install the new 580 L I just purchased on this forum SALE site. Good luck on all of you running outrunners, I would love to be kept posted as to your results........and see if it eventually has some potential!

[RIPFENCE]

Anyone got any results for a 580l in the mm yet??...it does seem overkill but when i saw the 75mph mm on you tube it makes the idea of a 580l seem laid back. I am going to try it for my next hull...which is a better setup for 60 plus on 6s lipo sport bashing...

580 9l 1426kv or the 580 10l at 1326kv? I would be trying an x642- x645 or some sort of 3 blade for the most speed and maybe a x442-x445 for longer runtimes

try another seaking/turnigy 180 esc also

[questtek]

Anyone got any results for a 580l in the mm yet??...it does seem overkill but when i saw the 75mph mm on you tube it makes the idea of a 580l seem laid back. I am going to try it for my next hull...which is a better setup for 60 plus on 6s lipo sport bashing...

580 9l 1426kv or the 580 10l at 1326kv? I would be trying an x642- x645 or some sort of 3 blade for the most speed and maybe a x442-x445 for longer runtimes

try another seaking/turnigy 180 esc also

See attached pics for the 580L with a water Jacket I picked from Stephen. I water-cooled a 200A Mystery controller and am initially running it on 4 S 5000mAh, 40C.
Initial tests with a plastic prop look very promising. I am getting Wolf IV to come up this weekend with his box of magic props to help "dial it in" I may go to 5S to see what a difference that makes. Full Eagle Tree set up with GPS to keep things honest.

[RIPFENCE]

Great questek, please share the results..i am close to buying the hull by this weekend..good luck

[DISAR]

I tried the 580 8L on 6s2p, 6600mah total with 440/3,642,645. All temps were below 50C, speed was good but did not measure. It's the yellow one

http://www.youtube.com/watch?v=g32lsAtHfyM&feature=player_embedded#