power of the 5692x1090

[crrcboatz]

Ok just made a GREAT trade for a 53" cat for my 65" deep vee. It has buttloads of room in the sponsons for a motor on either side. Was wondering if I used 2x 5692 1090kv on 6s each if they would move the boat well. I only want to run them 6s as the 2 escs I am using will only go that high of a voltage. Surge is 1040 amps.

I think this may be a great matchup for this hull??? Will post pics of the hull as soon as he sends me more detailed interior ones. Also if this 2 motor combo is ok what props on 6s for each would work best. I have buttloads of gas props but am ordering a variety of fe ones this week and need a range for this hull/ motor combo.

[crrcboatz]

old pics 030.jpgold pics 030.jpg

Here is an outside pic of the cat. He will build it any color I want.

[JIM MARCUM]

From what I've learned in ths forum you need a better ESC. Running a single 5692 @ 1090Kv with 8S2P or 8S3-4P will get you 32,264 RPM. The more packs you run in parallel the lower the amperage draw. IE: 8S4P draws 1/2 the amps as a 8S2P setup. I am putting a single 5692 1340KV & 8S2P (29.6V) in my 42" Aeromarine Sprint cat, & a single Leopard 5692 730 Kv (44.4V) with 12S3P in my Aeromarine 50" Sport X-Turbine Hydro. I suggest you spend the money for a Castle Creations ICE HV 200. It can handle up tp 12S Lipo @ 50 V, so you can try a variety of LiPo setups. You can buy one on ebay for < $300. More motors + more batteries = more weight.

The forum guys recommend starting with an Octura X462 two blade prop & working up form there. You should see 60MPH in no time.

NOTE: 1. Buy at least 4 of those fireproof LiPo bags for your parallel packs. 2. Secure your bagged LiPo packs solidly in the boat or risk a fire.

Hope this helps. JIM

[Mel279]

I'll be getting an EPV 135(53"), will be using 2x5692 730kv for 12s setup, 2xSF HV 240A esc's and x447 - x457 props. As for your setup, starts with x457...smaller than that will be slower but the motors and esc's will be cooler since its setup for 6s.

[crrcboatz]

Again only going with 6s not 8,10,12. 6s give you 24000 rpm x 2 motors that is my plan and im sticking to it. I cannot imagine needing a hv 200 ice esc for each motor that will be pulling 100-120 amps

Now with that what props for each motor?

[Mel279]

Again only going with 6s not 8,10,12. 6s give you 24000 rpm x 2 motors that is my plan and im sticking to it. I cannot imagine needing a hv 200 ice esc for each motor that will be pulling 100-120 amps

Now with that what props for each motor?

well in that case, just go with HW 180A esc would be fine

[JIM MARCUM]

CRRCBOATZ: I was only talking about using only one Castle Hydra HV 200. Please let us know how your setup works out. It sounds very interesting and will likely be a 60+ boat. JIM

[Fluid]

I'm afraid you may be unhappy with your motor choice, the Kv is pretty low for 6S and rpm on the water will only be around 21,500. You'll need a L+R pair of x465s props - or more - to go 60+ mph. They will take a lot of amps to spin on just 6S.

On a twin cat a better choice would be motors with a Kv between 1300-1500 if you insist on 6S. But in truth, you may have trouble getting the performance/run time you want on just 6S. Do what you want of course, but going 8S with those motors will help you in several ways.


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[JIM MARCUM]

FLUID: I have two 5692 1340Kv motors & Castle ICE HV 200 ESC. What LIPIO battery setup would you recommend for a 42" Aeromarine Sprint cat? I have quite a few 4S 4800 mAh 45C packs which I could run in 8s2-3p config. That would be 39,664 RPM, so I would also need a suitable prop recommendation. Help is appreciated. JIM

[crrcboatz]

I have 4 hyperion 6500x 40c lipos so 2packs for each motor should do the trick. I have done my own props for 25+ yrs so that will give me a place to start, ie a 65mm prop, maybe cut them down to 62mm or remove blade area, cup the tongues after cutting down, or back cut to release them some.etc. Tnks for the prop help. It will be a fun project for fall. Will keep you up to date fluid and the others.

[Stinger9D9]

...The more packs you run in parallel the lower the amperage draw. IE: 8S4P draws 1/2 the amps as a 8S2P setup...

That doesn't sound right. The amount of draw does not change when you add packs in parallel, only the amperage you can draw out of your batteries increases (and of course, the total mah capacity increases too).

If you want to lower your amperage draw, you need to increase the voltage and lower your motor kv. So to cut your amps from a 1090kv/8s setup in half (roughly), you'd need to run 545kv at 16s. Ok, a 545kv motor is probably not very common, nor is an ESC that will handle 16s, but you get the point - you'd wind up with the same total rpm in the end, but the current draw would be cut in half.

[Jacked1]

If you use 6s, what I would do is go 2p per motor and use the 1340kv version.

[JIM MARCUM]

I ment the amount of amps drawn from the batteries, not the motor. Doesn't running 8S3P cut the amp draw for each 8S pack by 1/3 rd? JIM

[crrcboatz]

I already have the 1090s. Hey if I can get 55-60 out of it I will be a very happy camper. More well icing on the cake. I cked the amperage draw on the leopards 1340 on 6s and that is just higher than I want to go. This setup on 6s should not run hot and with 12000 per motor to draw from on each motor run times should make it a hoot.

Any more suggestions on props?

[Jacked1]

I would say a couple L/R X457 would be a good prop to start on. Also since the rpm is on the lower end, you could get some less expensive carbon props. They have counter rotating 57 and 63mm props here on ose. I use a 54mm carbon prop with a 1100kv motor on 6s in a smaller cat and get around 43mph and have never had a problem after 100+ runs.