Viper R/C 1800kv Nude shots with dirty hand
 

I finally got the Viper Buggy motor in. Packaging is excellent and delivery service is top notch. I will post more once I get some free time.

It's rated at 1800kV
2 Pole rotor with 3 slot stator
5mm Pinion shaft
7.35mm Rotor shaft cut down to 5mm in the front
4.47mm Rotor shaft in the rear. So rear bearing is smaller than the front.
45.04mm Magnet length
13.82mm Magnet diameter

The motor feels notchy.
The back cover is plastic.
The sensor is replaceable.
The rear has a rubber seal.
Assembly is very good.
Front motor screws are 2mm and the rear are 1.5mm hex.
Heavy copper tabs.
Front has shims and spring assembly.


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Seems like many have vaited for the Viper 1/8's. I wish they were 4-pole.... I would love to try one of these, one of the new orion 4-poles, and thunder power has announced the release of some 4-poler's too.

Thanks for the naked pics. Your hands are so nice, do you use lotion? :lol:

TG

:lol: No that is all natural!

This motor looks like what the LRP tried to be. A 2 pole sensored monster. This motor has its purpose. At times you don't need the torque of a 4 pole motor, but want faster spool up. Another thing you can use at your advantage is Turbo, which you can't really use with a 4 pole motor. You can go nuts with timing and set when you want your timing advance to kick in.
The Castle, Tekin, Tekno, and Plettenberg that I have are all 4 pole motors, but they all behave differently and they all have their purpose.

Hmmm, so this might be good in a buggy. I have more than enough torque as it is with my 1717 1y right now. And I am in the market for a 1800kv motor anyway.

How much does it weigh?

Viper list the buggy motor @ 12.91oz / 366g.

Great, that would save me another 90g on my total weight.

I just got mine installed in my GT, 2450kv on 4S. Hopefully have some time to play with it this weekend. This will be my first time trying out a 2-pole for 1/8 scale.

I don't believe those are your hands, you used a hand model didn't you?Besides I thought you were right handed, so wouldn't that be your "clean" hand? :lol:

BTW: I am back in town if you wanted to bring over that office software. I have my scale here and we can weigh it and see if they are just guessing on weight. You know how I amm with weights. :yes:

Update
 

Did a test run today. It's nite and still 100F outside. The motor is what I expected to be. It has a bit more power then the LRP 1/8 motor. I couldn't get it started in sensored mode with the RX8, so I just ran it in sensorless mode. The RX8 started up the motor just fine. I'll check later if it was my sensor cable or maybe just a bad sensor.

I just ran the GTP up and down the street. The power was nice and smooth and braking was strong with my gearing. I did some hard starts and hard braking just to see how the motor would do. The motor was @ 176F and the ESC was @ 107F.

My conclusion so far; This motor is good for a light 1/8 scale car or when the weather is cold. Power band is smooth making for easy driving. I still need to figure out the sensor issue.


Tekin RX8 ESC 107F after the run
Motor 176F
9min 15s
154A peak
2245W Peak
26.39A avg
408W avg
1384mah consumed
47/21 gearing
GRP tires @ 100F 9.20PM
Protoform body
Eagletree V4
EC5 connectors
Acepow hardcase 5000mah
6mm bullets

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How strong is the viper motor compared to a feigao xl, or even the novak hv motors?

Thomas

oooh good question. Racing against Novak HV a few times, I can say the Viper is a bit more powerful. A Feigao xl would be stronger for sure, but max rpm would limit you.

I wish I still had my Gauss meter.

There are new rotors in the works. Different materials and different sizes.

Yesterday I ran the motor again and result is FAIL! Mikes Hobby shop onroad track was used.

Runs too effin' hot man. 170F running half a pack is not exceptable. I had to ease on the brakes and throttle to get to 150F. Was like granny drivin' in loserville county. I had more fun driving a 1512 1400kv 4pole motor. Sensor board on the motor is toast as well. My son's 2 pole C50L 1800kv Hacker has more power/excelleration and runs way cooler. There was another Viper motor on the offroad track and that one also ran stupid hot.

Eh that sucks. Personally I much prefer the four pole motors in the heavier/higher load vehicles. I do like the sensored motors but honestly the sensorless are just as good and a little more powerful IMO. On the other (left) hand you have been groomed by the fantastical powers of the neu motors soooooo. Good luck man hope you can find an application for your soon to be repaired brand newish motor.

Does suck. But I am talking to the "man" of Viper-RC now regarding my findings. I've been asked to test future rotors out.

I have been spoiled by Hacker, Plettenberg, Tekin and Neu motors. The Viper motor has some large shoes to fill.

Sounds like they should've made them 4 pole instead.

They would of had a winner if they made them slotless.

Update as of last nite. I ran the motor with a 20T, 0 Timing and super low brakes. The low brakes was a mistake, as I crashed my car taking out the servo. But in the short time that I ran it, the temp got to 125F or so.

Did a few test runs again with 0 degrees timing. Temps where much better.

Run #1 measured with Eagletree V4 150A.
Tekin RX8
0 timing
Stock brakes
4s hardcase Acepow
20T pinion
Ofna GTP 47 spur
Peak Amps 157.35A
Peak Watts 2069W
Continuous Amps 22.08A
Continuous Watts 324W@14.68V
129F


Run #2 measured with Eagletree V4 150A.
Tekin RX8
0 timing
Stronger brakes
4s hardcase Acepow
23T pinion
Ofna GTP 47 spur
Peak Amps 162.21A
Peak Watts 2039W
Continuous Amps 27.67A
Continuous Watts 400W@14.44V
142F

So it looks like I can go up another tooth with the pinion and still be good with temps.