Serpent Natrix 748e
 

Serpent have released their new 200mm electric touring car. Following on from the awesome 747e.

http://www.serpent.com/news/13838/NE...200mm-EP-.html

http://www.serpent.com/product/804009/

I seriously question how much of a difference "performance wise" it will be vs the 747e

Probably similar to 747 to 748 nitro version which is quite a bit!

You make a valid point Dan V.

So anyone got one of these yet?

And if so, could you post some pics?

I have one been testing on carpet and asphalt
There is also a fb group with pics
https://www.facebook.com/groups/SerpentNatrix748e/

What do I need to do to this car to make it a 190 mm class car? Local indoor track runs 190mm instead of 200mm so I'm on a quest to run this in the 190mm class if all possible.

You'd have to cut the arms and run shorter driveshafts. By doing that you would mess up all the roll centres and geometry. I don't think the car would work very well. You'd be better off finding a 411 2.0 or 3.0 I've spotted a few in the for sale section going for not too many dollars.

http://promo.serpent.com/natrix-748e/ so the car is out, anyone tried yet? seems pretty fun, does it eat up tires fast?

Will a 13.5t 540 brushless fit and be adequate enough on 3s? Does it come with a pinion if not what pitch/mod? There s such little info on this car. I've got a touch of foams I'd like to eat up with this thing :)

I think you'll struggle with a 540 motor on 3s. They are designed for 2s. 2s on 4.5 - 5.5 is a much better option. The car is awesome and plenty of info on the Serpent site and the Facebook page (just search Serpent 748e on Facebook). It doesn't come with a pinion (as all pro level cars) but the spur is 48dp. Use the calculator on the serpent site to choose the right pinion which is depended on cells count, tyre diameter and spur.

i like the set up with a short course motor :D plenty of torque. which means endless gearing

also is there much different between the 747e and the 748e?

Not a huge amount. Just the new bits from the 748 gas car such as the new 'TQ' diffs. The motor mount arrangement, centre pulleys and the way the top deck connects makes the 748e flex in a more uniform manner. I had the 747e which was a conversion from the previous seasons gas car and now a fresh build 748e and the 748e is definitely a better car than the 747e.

I did tried the hobby wing SCT setup as well but found it too heavy really. Plus with the longer motor found chassis balance L/R was an issue. I do prefer the 540 4.5 - 5.5t setup to be honest. Car feels more balanced and is better to drive. True to have to watch your gearing to avoid getting too hot but that really isn't an issue.

true true true. that is a major issue that igored to much. finally not that its winter im going to try and set it up correctly. a little annoyed that serpent is so expensive and its seems there arent many places to get replacement parts for my 747e. prolly shouldnt had hit that curb at 70mph:weird:

well... i guess i should had waited

I really want this car but there isn't a class in sight. :(

What parts do you need? Remember that all the transmission and suspension components are the same across the 747, 747e, 748 and 748e.

I know the feeling but hey the car is fantastic fun and nothing stopping you running the car against others on practice days. Thats what I do and have a blast doing it!

I ran foam tires last ourtdoor season on my Eryx, it was much more fun than running rubber tires. This season I will run a 748e outdoor, no racing but I can bugg my Nitro friends :sneaky:

I really like the durability aspect with big bearings. In the steering knuckels 10x15 instead of 5x10 and 2.5x8x12 on the eryx. Downside is the extra weight, will be interesting what will happen with the laptimes compared with the Eryx and foams on my hometrack

Remember you run 30mm wide rears 26mm wide fronts on the 748. On the ERYX you would have been running 26mm front and rear. My guess is with the same motor/esc on 2s the ERYX would probably be faster over a lap but more difficult to drive on the limit. The 748e is just more fun and easier to drive fast.

My kyosho rrr wheel fit 30mm on the rear same with ellegi tires. Minimal rubbing. Both on the Eryx 3.0.

What's the offset on those wheels?

Based on the concave I want to say -2 max bit they all fit otherwise. The boxes arent marked. Ill check the wheels...

They arent marked you want me to post pics? Maybe you can tell if they are offset or not?

No it's ok just curious. Must be different than the usual wheels/tires we run on the car and so because the offset would be different it would also affect the track width of the car as well.

Wheres the gear chart I cannot find it? Does it come with a spur? If not can I use my spurs from my Eryx?

It comes with a 48dp/75t spur which is the same fitment/type as the 411.

The internal ratio is the same as the 747e so you can use this calculator on the serpent site.

http://www.serpent.com/file.php?FileID=5916

I went ahead and picked one up. Something I cannot resist about this car. I guess my next will be a 1/8 scale and I'll probably be done.

I picked up some Contact RC foams and a Team Powers Actinium 4.5T motor - it was only 700kV under the next highest but about a third to half the cost. I'll be running my Brushless Hobbies 120A ESC in this car as well. A couple 3300 packs, a couple 4400 packs, and a couple 5500 packs.

How long should these packs last if I'm just tooling around the culdesac/speed runs? It's a shame I cannot race it at least not yet. Maybe it will take off if I practice with it at the track.

Shoot I should have picked up a 4 pole 540??? What kV?

Hi. Great news. Welcome to the snake pit ;)

That gear will be fine. Don't worry too much about the kv etc just add a little timing boost and turbo and you'll be all good. Also don't bother with 4-pole. You should get around 6-7 minutes from the 5500. I'm assuming 2s on that electronics setup?

1/8th electric you need to consider the 977e - brilliant car!

Run at the track as much as you can. Once people see it they will want one too. That's what happened at my local track!

I will! Yea 2s.

Does anyone make GTP/Lola bodies for 200mm? Also where are yall getting those wide rear tires from (747e thread)?

The car is great on 2s.

The Tyres are standard 30mm foams (26mm front) which you can get anywhere that supports 1/10th 200mm TC class. The GTP/Lola bodies are available from Blitz for one. RCM has them in stock.

If you want the ultra wide foams for the car for the GTP class you can get them from Xceed as one of the manufacturers.

.

I cannot get this to work.

Are you opening the file in MS excel? It works perfect for me...

It works now. 25t pinion sounds about right. Might try 30t and go back to the future (64mm tire).

Hello, friends!
I've just bought myself a new 748e for drag racing.
Might need some help.... my target is go over 120mph.
Here is the upcoming setup:
Stock Serpent Natrix 748e (Spur 72t 48p stock)
TENSHOCK 4 Pole Sensor Motor SC411 4,600Kv
6500mAh 14.8V, 4S 75C Hardcase LiPo Battery
Futaba BLS351 Brushless Servo
Xceed RC 26mm "Enneti" 1/10 Nitro Sedan Front Tires (32 Shore) 65mm diameter
Xceed RC 30mm "Enneti" 1/10 Nitro Sedan Rear Tires (32 Shore) 65mm diameter
Robinson Racing Pinion Gear Hardened 5mm 48P 33T
PROTOFORM SRS-N 200mm custom painted body
Futaba 2.4GHz Fasst Radio
Does anyone see any issue with this setup?
Any recommendations?
Thanks in advance,
Dawn.