Medusa Brushless motors..36-80mm

[Steven Vaccaro]

If any of you guys buy these and have a good set of calipers I can maybe help with the water jacket.

[calcagno45]

If any of you guys buy these and have a good set of calipers I can maybe help with the water jacket.

Thats what I was curious on. I'd try one out but I want to be able to cool it....

Steven, would this help?

http://www.medusaproducts.com/pdf/MechDwg_MR-3680-XXXXV2SE-5.pdf

[crrcboatz]

If any of you guys buy these and have a good set of calipers I can maybe help with the water jacket.

My 36x80 medusa mics in diameter:35.84mm or 1.411 inches

With regard to length, is is 80.53mm or 3.170 inchs HOWEVER, the motor has the wires exiting out the side so a cooling sleeve could not run the entire length of the motor.
Its length to the cutout in the case for the wire opening is 74.30mm or 2.925 inches. I would think you would not want the cooling sleeve to run right up to this opening in order to guarantee that no water go into the motor at the edge of the wire opening.

I have other brushless motors I can put in my emaxx and erevo. If someone builds a water cooling jacket for this motor I will put it in a 32 inch epoxy dv I have or a 34 inch aero. titan I have. It is a 1600kv rated motor.

Tnks Curt

[crrcboatz]

Thats what I was curious on. I'd try one out but I want to be able to cool it....

Steven, would this help?

http://www.medusaproducts.com/pdf/MechDwg_MR-3680-XXXXV2SE-5.pdf

edit: I thought there was a good diameter number in there but I guess not. I just might have to be the guinea pig... I'll throw it in my Erevo if not. 36X80 2200 here I come.

I visited with a car guy I have a great deal of confidence in last night about this motor. He had working knowledge of it as one of his friends had one in a stock emaxx with 14.4 batt. setup. He said the guy tore up his emaxx with it in less than and hour. He said it just had too much power for the truck. Mine has a alum chassis and a lot of alum parts with robinson racing gears in every area of the drive train including full metal rr gears in the tranny. He told me this motor would simply strip out the hubs if I had that. He felt the 36x70 was better suited for the monster trucks.

[Flying Scotsman]

Stick the motor in a boat and send us a reply with ALL documented data

After at least 3 runs

Douggie

[calcagno45]

edit.... Changed my Mind

[crrcboatz]

I am working to get the 36" team believer going. If I put it in something it will be sport only and not more than 5s power. Calcagno unless you get what is in stock you will need to wait probably 4-5 wks for the motor. I wanted a 1600 instead of the 2000 which was all they had in stock at the time. Ended up waiting 4+wks for it to be built. Was well worth the wait however. The feel of the armature turning over is not anything like the neu 1515 I have. It has such megnetic resistance compared to any of the other other motors I have.

[calcagno45]

...It has such megnetic resistance compared to any of the other other motors I have.

So I'm guessing these motors don't spin freely like Feigao's, they are more the the SV27 and BJ26 motors...

[DINO7]

Yes.the Medusa motor dont spin freely like Feigaos.my collet is here and my 36-50-2200V2 is allready on the boat.so tommorow if the sea will be calm i will try it with 3s and 4s.

[ghostofpf1]

Well they graciously took the time to reply and just as I said...

"Steve,



We get the various components fro the motors from all over the world.

The only thing we get from China are the magnets.

Yes, we do all the design work and everything is made to our specifications.



Regards,



Jeff Little

Medusa Research, Inc."

//////////////////////////




These motors are made from outsourced parts and built by offshore labor...only the design work and specifying is done here in the USA.

Now none of this was to try to discount these motors quality...just an effort to clear the smoke from the room...

Steve

[DINO7]

sorry but here in Athens we have wind and rain this days.maybe tommorow if the weather is better i will try it and report my impressions.

[DINO7]

so....first run with windy conditions.
hull=head of the river cat
motor=medusa 36-50-2200v2
batteries=zippy flightmax 2200 3s1p 25c in parallel for 3s 4400mah- 110 amp
prop=octura x/440
after 2 first min. of running i checked the motor temp.it was rediculous 23c.so i continued to run it hard until the batts ended.the temp of motor was 43C and the esc was 60C.with graupner K42 about the same.the motor have lots of torque and the max speed its impressive.unfortunally i forgot my gps for measuring top speed.next time.

on 4S
batteries=2 x2S truerc 8000mah 15C in series for 14.8v
prop=graupner K40

after some testing runs motor temp was at 63C and esc at 60C again.everything cold and nice.with 4S its was difficult to check max speed because the waves , the boat was flying easy.thats my first impressions from medusa on a fe.for sure my medusa stays on my cat.the motor is excellent for me.
sorry for my english.

[DINO7]

monday i will inform you with gps speed and exactly temps for motor esc with x/440- k40 -k42 on 3s and 4s.

[crrcboatz]

so....first run with windy conditions.
hull=head of the river cat
motor=medusa 36-5-2200v2
batteries=zippy flightmax 2200 3s1p 25c in parallel for 3s 4400mah- 110 amp
prop=octura x/440
after 2 first min. of running i checked the motor temp.it was rediculous 23c.so i continued to run it hard until the batts ended.the temp of motor was 43C and the esc was 60C.with graupner K42 about the same.the motor have lots of torque and the max speed its impressive.unfortunally i forgot my gps for measuring top speed.next time.

on 4S
batteries=2 x truerc 8000mah 15C in series foe 14.8v
prop=graupner K40

after some testing runs motor temp was at 63C and esc at 60C again.everything cold and nice.with 4S its was difficult to check max speed because the waves , the boat was flying easy.thats my first impressions from medusa on a fe.for sure my medusa stays on my cat.the motor is excellent for me.
sorry for my english.

I like this!! Maybe medusa has a good product??!!!!!!!!!!!!!!

[DISAR]

Just a note regarding the watts stated in Medusa site for the 3680. The 1300 watts are for minimal cooling, with proper cooling these can be doubled. Just received their reply:
"The watts we list are for minimal cooling.
If you can properly cool the motor (i.e. airflow & heatsink or water jacket) you can pretty much double the watts.
So to answer your question, yes, if properly cooled. The motor case temperature should not exceed 180F"

and my question was:
"Is it safe to operate the motor at about 2000-2500 watts, 22.2 V, 100-150 amps for about 5 minutes?"