Expectations 1/8 scale hydro electric conversion

[Make-a-Wake]

[ATTACH=CONFIG]126557[/ATTACH]
Motor arrived. Waiting for ESC.

You gonna have any cooling for it.......................a plate?

[SJFE]

I'd say that big hunk of metal its bolted to will be a pretty good heatsink.

[T.S.Davis]

I can't vouch for them being equal to the Scorpion quality but Hyperian sells a very similar motor if anyone else is looking for one.

http://www.nationalhobbies.com/hyperion-hs4035-0800-kv-high-rpm-outrunner-motor-p-6239.html

[Ronbo]

I can't vouch for them being equal to the Scorpion quality but Hyperian sells a very similar motor if anyone else is looking for one.

http://www.nationalhobbies.com/hyper...or-p-6239.html

Scorpion makes the motor for Hyperion to rebrand.

[Fluid]

I've had one for about a year Terry, although I didn't pay nearly that much for it. Scorpion made them for Hyperion - it's performance is very close to the Scorpion I had (logged and GPS). Not nearly as pretty though. Both are strong motors.




.

[T.S.Davis]

Makes sense that it's a Scorpion.

Check out this price!

http://www.empirerc.com/hyperion-hs4035-0800-kv-high-rpm-outrunner-motor-p-4577.html

[Namba328]

Just got one !!

[Make-a-Wake]

I'd say that big hunk of metal its bolted to will be a pretty good heatsink.

I actually meant a cooling plate, with waterflow...........the kind that mounts between the motor and mount.

[Fluid]

Check out this price!
http://www.empirerc.com/hyperion-hs4...or-p-4577.html

Wow, that is low. I wonder if thees motors will ever be available since Scorpion is no longer making that version....my guess is the low price is for clearance to get rid of inventory of a discontinued product.



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[PJBJ]

I actually meant a cooling plate, with waterflow...........the kind that mounts between the motor and mount.

Would be nice to cool the mount in the area where it is bolted to the motor but I will try first using without. If I burn up the motor I will take the route with a quality water-cooled inrunner.

The specs of the Scorpion state: ...stators are wound with wire that is rated at 180 degrees C (356 F). The magnets are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use...

[PJBJ]

I'm more worried about water getting into the motor/ESC compartment. There is a gap between the hull and the cowl which I tried to minimize using a rubber strip. Hopefully you can get an idea from the pictures I made in the dark. I am not happy with this solution and some input would be appreciated very much.

After doing some reading on waterproofing I came up with the idea to tape transparent plastic over the engine compartment and place the hatch over it. This will do the trick.



I also think this has nothing to do with scale hydroplane FE talk. Sorry...

[PJBJ]

If you can find a Scorpion HK4035/800 buy it, these have been out of production for well over a year. I ran one in a 10S catamaran and it performed well but these motors do not like high amps, especially since they can't be effectively water cooled. Keeping runs short helps. They run well on 8S too and will swing bigger props.

Do not be fooled by a motor's rated "power output", that is almost always misleading. The Scorpion is actually rated at 100 amps maximum, but on 8S 4200 watts is about 140 amps. For short runs it will work. The real advantage of the big outrunner over an inrunner is the greater torque of the former to spin larger, more efficient props. Your big heavy hydro will need that.

Some battery sellers can supply balance plug extensions for your 4S packs. I usually charge in the boat with no ill effects after over seven years of doing it...

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Found a seller for a water-cooled Scorpion HK 4035 but with a little higher Kv-value

http://www.mhz-powerboats.com/E---Motoren/Scorpion-Motoren/MHZ---Scorpion-Motor-HK-4035-1260.html?XTCsid=d66ae1d80d1034e8443ced06de508d6f

[PJBJ]

I finally tested the boat with a 2 blade 55 mm prop and it went nose down and the prop seems way to small for this heavy boat. I now managed to move back the batteries some and I added some adjustable weight in the back to find the best balance. Now I would like to try and see if the boats comes out of the water with a Prather S265 prop I have without damaging the electronics. Possible??

[PJBJ]

can not get the boat on plane. dumas 1/8 hydro solid shaft 15lbs ready 8S outrunner 4035 800Kv ESC 240 Amp. boat goes under. tried moving batteries front to back and different prop diameter 65 and 57 with some more pitch. Had it on plane before 1 time with big prop, batteries in front and a lot of lead on the rear wing which blew of during that run. after this lot of water in the boat which killed the ESC. Now the boat with new ESC and battery in the back does not come out and went under water akula style > 10 m. I think the prop is to shallow to grip. hull on the wall?

[JimClark]

can you adjust strut?