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Old Jun 30, 2009, 06:07 AM
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ARC 36-65-1 (Kv 2080) 36-75-1 (Kv 1680)

LightFlight RC has these two long canned 36mm motors available now. Has anyone tested these in a 90mm fan?

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Old Jun 30, 2009, 07:15 AM
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Hi Scarey,

Have a look at Carls' testing thread, on the first post, are tests of the 75mm motor.

http://www.rcgroups.com/forums/showp...82&postcount=1

Cheers

Matthew
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Old Jun 30, 2009, 11:56 PM
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"ARC 36-75-1 1680kv 75mm long motor, 12.7 oz w/ connectors
No load Kv test,
11.43v, 1.98A, 22.0W, 19,225 RPM, 1682 no load Kv
Installed in Midi fan
6s 7700ma (3850+3850) heated to 104F
24.95v dropping to 22.38v, 70.7A, 88.1oz T, 1589.5 W, 34,450 rpm 1536kv under load, 165mph eflux

7s 7700ma 106F, 29.1v-26.1v, 94.4A, 118.3oz T, 2475 W, 39,225 rpm, 1501 kv under load, 194 mph eflux"

I wonder if the 75mm 36-75-1 could go to 8S ?
Amps would probally be 100+
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Old Jul 01, 2009, 10:46 AM
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Quote:
Originally Posted by Scarey
"ARC 36-75-1 1680kv 75mm long motor, 12.7 oz w/ connectors
No load Kv test,
11.43v, 1.98A, 22.0W, 19,225 RPM, 1682 no load Kv
Installed in Midi fan
6s 7700ma (3850+3850) heated to 104F
24.95v dropping to 22.38v, 70.7A, 88.1oz T, 1589.5 W, 34,450 rpm 1536kv under load, 165mph eflux

7s 7700ma 106F, 29.1v-26.1v, 94.4A, 118.3oz T, 2475 W, 39,225 rpm, 1501 kv under load, 194 mph eflux"

I wonder if the 75mm 36-75-1 could go to 8S ?
Amps would probally be 100+

tailslide is running one on a midi fan and 8S XPS cells. 3.2kw if i remember correctly, and 111 amps.
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Old Jul 01, 2009, 10:58 AM
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i think the 65mm 2080 kv would work well in a HW609 fan (75mm) what do you guys think?
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Old Jul 01, 2009, 09:11 PM
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Went with the HET 6905 with the 36-75-1 for 8S. Suppose to be softer then the Midi. The HW 609 with the 36-65-1 should be good with 7-8 S.

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Old Jul 01, 2009, 11:31 PM
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I'm looking at a 6s Midi setup in a Fly Fly Mirage. I looked through the 36mm Arc Motor thread and found a post that Carl Rich posted testing the 36-55-1.5 with Midi on 6s

6s Zippy 3500 30C packs that are much newer. Heated to 102F
25.0v-21.41v, 79.94 amps, 95.5T (5lbs 15.5oz), 1716W, 34850rpm, Kv under
full load was 1617, efflux velocity 176mph

Now the longer can motor:

ARC 36-75-1 1680kv 75mm long motor, 12.7 oz w/ connectors
No load Kv test,
11.43v, 1.98A, 22.0W, 19,225 RPM, 1682 no load Kv
Installed in Midi fan
6s 7700ma (3850+3850) heated to 104F
24.95v dropping to 22.38v, 70.7A, 88.1oz T, 1589.5 W, 34,450 rpm 1536kv under load, 165mph eflux

The 36-55-1.5 is 1850kv and the 36-75-1 is 1680kv. I was expecting the 1680kv to pull less amps.

Should I go with the 36-55-1.5 and save about 4 oz in weight. There is only a 9 amp difference. Would the larger motor stay cooler?

Thanks for any advice

Kelvin
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Old Jul 13, 2009, 06:44 PM
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I got to fly my 75-1t on 8s in a Midifan Pro yesterday. I was using XPS 5000mah cells (two 4s packs). The final amp draw on fresh packs was about 95amps and the volts were holding at about 29v, so that`s about 2750watts.
9s sounds tempting.


I got in two flights with it. The temps at the field were over 100 F and the motor performed like a champ. I didn`t get any video, but might get out to the field one evening this week and shoot some vid.

A turbine pilot at the field said he thought that it looked like it was going 200mph. I assured him that it was probably much closer to 150 than 200.

The plane has wings from my old Falcon 25 with a custom fuselage that I made for them after the orig fuse was lost in a crash. The nose wheel is retractable and it has two 1/8" wire skids for the main gear. It`s a pretty slick little plane with a span of 44" and an AUW of 7lbs , it would be 6.5lbs, but I had to add 8oz of nose-weight to get it to balance.

I`ll post a pic of it.

PS.. one word of caution... I did have the back-plate on the motor come loose while running it on the bench. Luckily I caught it before any damage was done to the motor.

While I had the back-plate off, I made a little mod to the motor leads. I`ll include a pic. Dave, I think that this would be a good mod for future batches of motors. All of those wires coming out of one hole creates a lot of heat between the three wires at higher amp levels. Keeping them separate helps with the heat. Also they are already in position to exit through separate holes so it should be slightly easier to do at the factory.
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Old Jul 14, 2009, 01:58 AM
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Lee - Good idea with the motor wires. Now I will have to check my back plate.
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Old Oct 30, 2009, 01:41 PM
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Was just checking out my ARC 36-75-1t and can't figure out how the back plate is removed. I too believe the wires would be best exiting from seperate holes in the motor.
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Old Oct 30, 2009, 02:21 PM
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I've been running the 1T in a edf trainer from nitroplanes now for about 6 months now. Fantastic motor, can easily handle 8S. Granted my plane is no speed demon, but I more efficient fan than the 100mm fan would show more promise.
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Old Nov 01, 2009, 09:16 PM
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I just ran up my 36-75-1 on 7s Rhino 25c 4900, 3s + 4s. 85 amps.
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Old Nov 02, 2009, 07:34 AM
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Quote:
Originally Posted by kelvin View Post
I just ran up my 36-75-1 on 7s Rhino 25c 4900, 3s + 4s. 85 amps.
I think that is the sweet spot for this motor. Notice in Carl's test he preheated the packs to 104F and saw almost 10 more amps. I have this motor and a Midifan that will be going into an old HOB Sabre. Thanks for posting your results kelvin. Were you running with or without the heatsink?
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Old Nov 02, 2009, 12:14 PM
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I just ran a short burst to test for amps. I'm not using a heat sink. I haven't flown the model yet, a FlyFly Mirage. I'm in the middle of glassng the airframe. I just bench tested my power system this weekend. I wish the amps were lower.

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Old Nov 03, 2009, 12:30 PM
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What fan did you use with that setup?

Quote:
Originally Posted by kelvin View Post
I just ran up my 36-75-1 on 7s Rhino 25c 4900, 3s + 4s. 85 amps.
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