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Home✈️Aircraft🚁Helicoptere-Thunder TigerRaptor E620 › Which Scorpion Motor for the E620?
08-20-2008 02:09 AM  12 years ago
Ben-T-Spindle

rrProfessor

Central Illinois

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I see where they think that Scorpion magnets are not as good as advertised. They are probably the same as other hobby brands like Z-Power. I have had no problems with Z-Power magnets and we never see any can temperatures of 150c (that’s over 300F). My Z-Power always runs cool so if Scorpion is anywhere close it won’t be a problem.

Some of those forums you have folks that like to talk technical and has no useful information to the average RC flyer.

Has anyone heard of any actual failures with this motor? I have seen the thread where a 4035 failed on a Raptor 90 EP conversion but I don’t think he had it set up correctly.

... BTS
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08-20-2008 02:12 AM  12 years ago
Ben-T-Spindle

rrProfessor

Central Illinois

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Since the 4025-740 has a lower Kv than a Z50A-800 if you have a 9t pinion on both the Z50 will probably feel more powerful. The question is if you put a 10t pinion on a 4025-740 will the motor overheat or exceed some other motor limit causing failure.

... BTS
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08-20-2008 09:01 PM  12 years ago
shooter75

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Woodland Hills, Ca

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Just to give you guys a heads up on the Scorpion Motors. I have a 4035-560 that just burned up no me after three flights due to a front bearing failure. It overheated the motor, melted the wires then POOF a big puff of smoke and burnt the windings. Im thinking of replacing the OE bearings with some ceramic ones from Boca Bearings next round.

Eric
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08-20-2008 09:22 PM  12 years ago
Ben-T-Spindle

rrProfessor

Central Illinois

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If you disassemble the motor you should take some photos so we can see how to replace the bearings.

... BTS
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08-20-2008 09:47 PM  12 years ago
shooter75

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Woodland Hills, Ca

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I absolutly will for you guys.

Eric
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08-21-2008 01:59 AM  12 years ago
Truthunter

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Campbell Hall, New York

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Shooter75,
How did you set the gear mesh when you installed the motor?
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08-21-2008 03:34 AM  12 years ago
shooter75

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Woodland Hills, Ca

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I usually set the mesh at 0.10mm to 0.20mm max. Thats pretty much how Ive setup all my helis and never had a problem.
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08-28-2008 05:18 PM  12 years ago
Ben-T-Spindle

rrProfessor - Central Illinois - MyPosts All  Forum  Topic

I just got my Scorpion HK4025-740 today and it is sure a thing of beauty (bling bling). It cones in a real nice metal box with mounting screws, connectors, and decals. They even threw in a real nice transmitter strap.

... BTS
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08-28-2008 05:58 PM  12 years ago
Truthunter

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Campbell Hall, New York

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Nice BenT... keep us updated with how you like it and how it compares to other setups you have had. RCman over at RCG finds that it's more efficient than the Z50A-800 giving him slightly longer flight times.
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08-28-2008 07:37 PM  12 years ago
Ben-T-Spindle

rrProfessor

Central Illinois

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The T500 guys were saying that they are less efficient than the Z30A. I don’t have a data logger so I won’t be able to see small differences.

I am also upgrading to a Spartan gyro and BLS251 so it will be this weekend before I can try it out. Does anyone have some real good Spartan gyro settings for the E620?

Just from appearances the quality does look to be higher than the Z50A. The internal shaft is 8mm and the bearings look to be fairly large. The output shaft is turned down to 5mm so it fits the standard pinions. I don’t know about you guys but I have had some bearing issues with my Z50A.

... BTS
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08-28-2008 08:08 PM  12 years ago
concept1

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Youngstown, OH

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how many cells are you going to run with this? I am looking for a motor for my E620 for 14-15s A123? i will probably need something in the 600 range?
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08-30-2008 03:11 AM  12 years ago
Truthunter

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Campbell Hall, New York

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I am also upgrading to a Spartan gyro and BLS251 so it will be this weekend before I can try it out. Does anyone have some real good Spartan gyro settings for the E620?
I've got the sparten on mine with a S9256 and I just followed the instuctions in the manual to set it up... I run the gain around 43 ... it works alot better than the gy401 I had on it previously.
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09-03-2008 01:37 PM  12 years ago
concept1

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Youngstown, OH

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well I got my Scorpion 4025-630 and got 1 test flight in this Am before work on 15s A123.
i was running the Neu 1912 1y on 10s lipo with 9t pinion, I got a solid 5 minutes of time and fantastic perfromance.

the Scorpion is also on the 9t pinion which WILL need changed to a 10t, first flight was kind of disapointing I bumped my curve from 85 to 95% and still head speed was a bit low. first as soon as I plugged in my pack I fried my medusa Bec, should have read the instructions!!! 54v is too much! Luckly I had a spare rx pack to get me going. but on the 9t pinion it just doesn't have the pop needed, but after 3 minutes the motor and pack wasn't even warm so the 10t pinion should be perfect! the 15s A123 pack is about 150g heavier then the Evo 3700mah 10s, but the scorpion motor I believe is lighter then the Neu so weight isn't to far off.
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09-03-2008 02:34 PM  12 years ago
Ben-T-Spindle

rrProfessor

Central Illinois

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A123 cells have a very large voltage drop under load. According to the A123 data sheet they put out 2.8v at 40 amps. You can try a larger pinion but you really need a HK4025-740.

... BTS
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09-03-2008 02:50 PM  12 years ago
concept1

rrKey Veteran

Youngstown, OH

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on 15s A123 I would think the 740 would be too much, on the 9t pinion the 630 it is pretty much unboggable, but the head speed is just a tad low. Performance is just a little better then a stock raptor 50, but with the Neu motor on 10s lipo, it had more pop then a R50 with a Pipe. it flew more like a 90
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09-18-2008 09:27 PM  12 years ago
Ben-T-Spindle

rrProfessor

Central Illinois

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I have been doing a good bit of flying with my new Scorpion motor. I have flown it with an EVO25 10s, a Xcite 5000 10s and Xcite 9s. The motor is more than I expected. It’s so smooth and will not bog down.

The Xcite batteries are a new brand that has been getting fantastic reviews (xcitebattery.com). They are slightly heavier than the EVO25 of the same capacity but definitely have more punch. I have settles on a Xcite 9s 5000 setup as my favorite. I can fly for 7 minutes and put back less than 4000. I do think that the Scorpion is more efficient than my Z-Power or Neu motors (that Neu 1912/1Y is an incredable power hog).

I am going to build an A123 flybarless E620 over the winter and it will definitely have a Scorpion motor.

Anyone else have some good Scorpion stories?

... BTS
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09-19-2008 02:48 AM  12 years ago
jamesppp

rrApprentice

carrollton georgia usa

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I ordered an E-620 kit last night. Ive wanted one since I started flying helis in January.

I bought a Scorpion 4025-890kv motor to hot rod my Swift with but havent installed it yet.

I know an 8T pinion is pushing the envelope of required contact between the the pinion and the spur gear. If I used this with 10S lipos or 12S A-123 it calculates out to 2135 rpms using a .90 eff multiplier.

If the rpm's are doable, is there any reason not to try this combo. My 2221-8 Scorpion runs efficiently at 75-90% throttle in my Beam. Hopefully its bigger brother will too. Couldnt I play with my throttle curve a little to achieve 2000 revs, or whatever works for me if it is less than the 100% calculated headspeed.

What do you guys think. Any advice for a soon to be new E Raptor owner. BTW, Im not good at flying yet. I just fly simple circuits, 8's stall turns a little and OF type flying. Of course I hope to continue improving my flying skills but Ill never be a really good flyer but I have fun trying.

Ill guinea pig this setup anyway. Worse case scenerio..Ill get a lower kv Scorp in there.

Ben-T-Spindle

Ive been using 5S 4100 and 3S 2200 Xcites for about 6 months and really like them. I charge them in pairs at 2C in less tahn 30 minutes. I didnt know they had 9S packs.

Thanks,

Jimmy
#:>)*.......................*(<:#
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09-19-2008 03:09 AM  12 years ago
Heli 770

rrProfessor

USA.

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jamesppp
You should really run that 4025-890 on 8S with a 10T pinion.
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09-19-2008 03:42 AM  12 years ago
jamesppp

rrApprentice

carrollton georgia usa

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You are right...but it would be much cheaper to just buy the lower kv motor. I have 6 4000, 4100 and 5000mah 5S lipos. I dont have any 4S and I have a bunch of 3S.

I do have access to nip Dewalt packs but 8S A-123 aint gonna get it I would think.

So do you not think it is even worth a try or do you think I might smoke something?

Thanks,

Jimmy
#:>)*.......................*(<:#
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09-19-2008 03:49 AM  12 years ago
Heli 770

rrProfessor

USA.

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Well yes!, get a lower Kv motor. I misunderstood your post.
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