JAE fe33 motor choice.

[montymike]

Want to build a zip kit rigger , first boat build looks easy and fun. I have a 1515 2650 castle and a swordfish 220 E.S.C. laying around . What do you all think a boat this combo, anyone use it?thinking on 4s and x440 prop or so. Called up zip kit and they say a 2000 kv ,but the 2650 is what I have. Also is there room for a cooling can? Building thread(s) would be nice Thanks in advance! Mike

[martin]

Mike go over to RC Groups forum on the Racing Boats Electric section & about 11 threads down there is a build log for the JAE 33 rigger. Done by crapshooter, its a very detailed build log with lots of pictures from start to finish.

[photohoward1]

That Motor is to hot for 4s

[T.S.Davis]

Are you looking to race it? You're best bet to get to race is to build it spec. So 4s and a motor that is less than 37mmx62mm. Any Kv you want. TP1950, Raider 2030, Proboat 2000. Any of those is under $100 with the jacket.

You can build those with an open motor but finding a full heat of P is tough. Where as "spec" you at least have a shot.

[Fluid]

The OP’s motor is pretty hot for 4S. My own JAE21 runs a Castle 1415/2400 motor, which works great spinning an H-7 prop. The average amp draw for a 6-lap heat was under 150 with peaks under 190. I use 3800 mAh for six laps with mill, perfect for a 5000 mAh pack. Average logged rpm on the oval is 28,000 topping out at 32,000 rpm. Top GPS speeds during a heat were in the upper 70s turning 12-second laps. It is as fast as I want to drive any boat in traffic.

Adding 250 to the Kv will increase speed, but also increase heat and cut run time. Average rpm could be in the 31,000 rpm range, this would be too much for the H-7 prop, driving amps up too high.

All this is a roundabout way of saying ‘buy a new motor’. If you want to run full P then a Castle 1515/1Y would work great. For a Limited boat I’d chose the ProBoat 2000 motor. Good luck.


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[rol243]

https://youtu.be/mBbqX4T6_lI

This is the earlier version jae 21/fe powered by the castle 2650 kv motor / 220 swordfish esc and the zippkits 1450 mod prop. he is running 2 x 2s packs for 4s power . the JAE33 has longer and wider tub than the 21/fe which gives more internal tub space for large size packs and no doubt is a more stable hull in choppy water conditions.

[Fluid]

Nice YouTube. Of course it looks fast. Unfortunately we have no idea of the speed, lap times (not a measured course), run time, amp loads etc. Like most YT videos we don’t know if the boat melted down after the video stopped, or if commulative damage destroyed the ESC a few runs later. So it’s pretty useless.

I’m not saying that the motor didn’t/wouldn’t work, just that a random YT video is not proof. Too many newbies rig their boats like the “sick legit ballistic” one they saw on YouTube. Many of them burn things up.

Oh, you should listen to the video, not just look at it. The guy says he is running the packs in parallel. They look too thick to be 2S packs too.

If the OP doesn’t want to follow the advice of those who have been there, that’s fine. Running an x440 would probably be pretty safe, but not nearly as fast as a more reasonable setup. As I stated in my previous post, good luck to him.



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[rol243]

yes i understand what you mean there Jay but he did say the esc and motor does get abit warm after a run , batteries stay cool. those packs do look abit fat for 2 s hey. surely he wouldnt be running that set up on 6s though. hope not.

[Speed3]

The castle 1515 2650kv and a x440 should be good high 50's to somewhere in the 60's once setup right. I can imagine short runtimes.

But if a lower kV around say 2000 is used you can use a prop around 47mm. This combo will be a little milder than the 2650kv x440 combo. And the 47mm prop being more efficient than the 40mm will like offer a higher speed using the 2000kv motor and at the same time be easier on everything.

[HTVboats]

I don't think 2650 KV is out of line for a 4S rigger. I have a Kep's FE that runs great with a Castle 1415/2400kv. I have run cut down 1450's H-7, H-10. M445-545 and an ABC 1717 seems to run fastest on our 1/8 mile short course. I have a TP 3650/2350kv but like the Castle better. Every boat has a sweet spot and needs X amount of blade area to push the load. Adding torque with lower KV and larger diameter just isn't my idea of efficiency. Larger hulls with more wetted area need torque but a rigger should be the least drag short of an aircraft.
That said my Kep's also works very well with a 36X60 AQ 2030 and might not be the fastest spec hull but very stable.
Keps 3.jpgKeps 5.jpg
Mic

[ray schrauwen]

I don't think 2650 KV is out of line for a 4S rigger. I have a Kep's FE that runs great with a Castle 1415/2400kv. I have run cut down 1450's H-7, H-10. M445-545 and an ABC 1717 seems to run fastest on our 1/8 mile short course. I have a TP 3650/2350kv but like the Castle better. Every boat has a sweet spot and needs X amount of blade area to push the load. Adding torque with lower KV and larger diameter just isn't my idea of efficiency. Larger hulls with more wetted area need torque but a rigger should be the least drag short of an aircraft.
That said my Kep's also works very well with a 36X60 AQ 2030 and might not be the fastest spec hull but very stable.
Mic

How thick is that rudder pushrod? Please, thanks

[ray schrauwen]

......

[montymike]

I have a 2030 aquacraft was thinking it was to small for this hull, thanks for all the imput.

[HTVboats]

It is a 4-40 pushrod 5" long with a "Z" bend. I use a Solar mini digital 60oz. servo and it works well. Also the compact Flycolor 150 ESC ($40) handles the under 2 watt motors easily. Bang for the buck racer all the way.
Mic

[rol243]

its not normally the best idea to use a z bend in a steering control due to flex from the rod from hard turning., might be ok for shock though. keep it straight if you can.