Which Motors For the EKOS?

[forescott]

for 4s I run 3600's and 3300's. They are plenty of mah. Remember the 9 or 10 xl on 4s can still be a hot setup if you run it for too long. Dont expect to run the ekos for 30 minutes straight. Start out with short runs. Check your temps. You will probably only get 10 minutes max without bringing it in to cool down. Thats just how it goes with fast electric.

[vasy]

for 4s I run 3600's and 3300's. They are plenty of mah. Remember the 9 or 10 xl on 4s can still be a hot setup if you run it for too long. Dont expect to run the ekos for 30 minutes straight. Start out with short runs. Check your temps. You will probably only get 10 minutes max without bringing it in to cool down. Thats just how it goes with fast electric.

What he said :)
But don't expect 10 minutes, on two 4500 we only get 6 minutes runtime.
So with 4000 you can have save 4.5 to 5.5 depending how trigger happy you are :)

[FighterCat57]

4s 4k 30c packs are the biggest I fit in the EKOS. My 4s 5k packs do not fit.

[LarrysDrifter]

4s 4k 30c packs are the biggest I fit in the EKOS. My 4s 5k packs do not fit.

Thats exactly what I ordered last night-4s 4000mah 30c from HobbyKing.Dont expectem anytime soon.Guess Ill run it on my 3s packs for the time being.(As soon as all my parts come in).I also took the battery tray out a while back and am going to lay down some velcro.

[FighterCat57]

Thats exactly what I ordered last night-4s 4000mah 30c from HobbyKing.Dont expectem anytime soon.Guess Ill run it on my 3s packs for the time being.(As soon as all my parts come in).I also took the battery tray out a while back and am going to lay down some velcro.

That might give you enough room for the 5k packs. It will certainly help with controlling your COG.

[LarrysDrifter]

That might give you enough room for the 5k packs. It will certainly help with controlling your COG.

How do you measure for center of gravity?Never did it.

[FighterCat57]

How do you measure for center of gravity?Never did it.

Pull out the EKOS manual, there's a page on it. Basically measure the bottom most rear of the boat towards the center balance point. Like measuring one side of the teeter totter. Think 8 3/4 give or take on the EKOS.

There's people that can explain it much better than me.

[LarrysDrifter]

Pull out the EKOS manual, there's a page on it. Basically measure the bottom most rear of the boat towards the center balance point. Like measuring one side of the teeter totter. Think 8 3/4 give or take on the EKOS.

There's people that can explain it much better than me.

Ok,thanks.I shoulda thought of that.Have to knock the dust off my manual.Havent looked at it in months.Wonder how long itll take for my batts to get here from HobbyKing?Im getting ancy to get all my parts and tear into it.I was originally gonna sell it all stock to a guy and got it cleaned up and went to set it up for him to test run it and the speedos were dead.All outta nowhere.Ran fine when I put it up.O well, I think Ill have alot more fun with it now.Thanks to everyones help that is.

[FighterCat57]

Ok,thanks.I shoulda thought of that.Have to knock the dust off my manual.Havent looked at it in months.Wonder how long itll take for my batts to get here from HobbyKing?Im getting ancy to get all my parts and tear into it.I was originally gonna sell it all stock to a guy and got it cleaned up and went to set it up for him to test run it and the speedos were dead.All outta nowhere.Ran fine when I put it up.O well, I think Ill have alot more fun with it now.Thanks to everyones help that is.

My guess on those is 2-3 weeks. They are using Singapore post and Swiss post to get around the Hong Kong airport restriction on lithium polymer batteries.

I just got two of my orders from last month last week. At least we know it will get here. Some countries you really have to wonder if the package will make it or not.

[forescott]

I have always gotten my orders to ca in about 10 days.

[FighterCat57]

I have always gotten my orders to ca in about 10 days.

Yeah, they've been pretty good until this past month. Usually within 14 days, but they've had some hurdles to overcome recently..

[forescott]

I got an e-mail from them about a month ago about improved shipping to the u.s.?? Go figure! I think they are worth the wait anyway.

[VIKOS]

I'm willing to bet 4s 9xl 32mm prop = 51-52 MPH.

Should sound really cool at high RPM too! I'm running 2700kv 540's on 4s w/32mm props. Really neat sound and some cavitation which seems to help keep the heat down by reducing the load. Only pulling 53 amps peak. I don't hole shot it, just run it up to speed.

Should be a good setup!

Umm if cavitation is anything like in the refinery business which I'm in... thats not good for a pump,can't see that being good for a motor. Thats when you have a low flow being pumped which would indicate very low cooling on the motors. I kinda want to stick with the 36mm so I'm thinking the 10xl on those would be like 32mm on a 9xl motor..higher RPM with torque. Cooling would have to be right though in this case.

[forescott]

A little cavitation is ok when planing. Some times getting the stinger adjusted correctly for maximum speed requires slight posotive adjustment, which can cause cavitation when planning. You just need to use a little finesse on the throttle. All of the offshore race cats with surface drives cavitate when planing.

[VIKOS]

Well ran the boat today..I cansay I missed running this lil demon..tested it on plastic props gona swap out to aluminum tomorrow for a morning run when its nice and glassy..she did a barrel roll in the water but stayed up right and kept going lol gottah love how well centered the hull is on this thing.