Top Speed post - RC-Monster Forums

zeropointbug · **Top Speed post -** 12.03.2006, 11:25 PM

Enter Top Speed, vehicle, motor, controller, and battery type/cell count, and weight if you know.

Have fun...

JOHNNYMAXXIMA · 05:21 PM

I'm sorry, I have to put my .02c in every time this thread comes up. Your post needs to state "verified top speed", otherwise you are going to get, "it seems like" or "I was keeping up with traffic so I must have been doing..." or "my friend says his truck goes XXmph and mine is faster than his so I must be doing..."

The only way this topic is any fun is if you have it verified by radar or gps.
Thanks

zeropointbug · 12.04.2006, 12:20 PM

you know what, you are absolutely right... ;)

How do i stop a stupid thread?

Serum · 12.04.2006, 12:24 PM

this thread was here some time ago.

I guess yours is 50mph on 2 dewalt motors at 700 watt output..

I am still waiting for the answer how you measured both speed and power.

zeropointbug · 12:38 PM

Serum, im telling. Those dewalt motors were measured by kershaw designs, they measured 300 watts @ 14.4 volts. I would be getting somewhere around 700-775watts with dual motor setup, dual EVX. Do you actually think it TAKES 1200 watts to get a RC truck to 50mph?? Again Serum, whats your deal.

Finnster · 12:43 PM

Haha, these threads are fun but tend to quickly degrade. Lots of tangents, and few people with verified results, but here goes:

2.5R Revo, stock everything but emaxx tranny
8xl/ 5s Lipos
16/51 gear

=>48 mph radar, repeated runs in two directions

Its entertaining puttng top speed threads to nitro guys, you get answers (obstufications) like, "well it was running rich", or "it was cool outside", or "the barometric pressure was falling". I don't really care, just put the speed up, how fast does it really go?

Serum · 12.04.2006, 12:39 PM

you are telling stuff about a 7XL doing 65 mph, and a 1940 with a lower kv doing 70 mph..

You obviously have got no experience with these things, and you are telling everything like it's an absolute fact.. That's what's wrong.

You mean you didn't actually measured the amps it took? you used it as a fact in another thread. That's what's bugging me.

zeropointbug · 12.04.2006, 12:45 PM

Serum, Kershaw Designs is a company, you are just talking out of your @$$ now.

Serum · 12.04.2006, 12:49 PM

Which was about the same i thought when you said your 700 watt truck did 50 mph..

Serum · 12.04.2006, 12:53 PM

You know a small lehner XL motor which is rated for 1300 watts can do 3000 watts?

and you know a Lehner 1950 suited for 1800 watts can do 6000 watts (output power)

that's why i asked if you measured them at all.. You based your facts on the wrong numbers, you see?

Dafni · 12.04.2006, 01:12 PM

Oh boy!

:007:

I'm with Serum, though. Throwing incorrect "facts" around just makes you look silly, zeropoint.
When you come up with "numbers" here, be prepared to meet some experienced guys' opinions.

Thanks
DAF

zeropointbug · 01:34 PM

What numbers?!?! What are you talking about!?

Here:
The truck weights 8.5 lbs, i was running 5s A123 pack. I did highway testing along side a car, the truck did a little over 50mph (82kph) ride beside the car. Also, running on a large street beside the cop-shop, they setup a radar gun to test it, and again it did 50mph. This was the absolute limit for these motors however. These motors are big, they can handle the load, they sure don't have the the torque of a brushless motor to get up to speed, but thats not the point. The point is, ~750 watts is enough to get an emaxx to 50mph. The gearing was 37/66 gearing direct drive to diffs, the motors are 5 pole motors.
Now i really don't see your argument.
Dafni, what incorrect 'facts' was i throwing around?

Serum · 12.04.2006, 01:44 PM

This isn't helping your story either.

50 mph on a radar gun is like 54 mph on a cars scale.

The fact that MANY other people on this and other forums did use a GPS or a radar-gun to see how fast their trucks go and used an eagletree or such to measure the power it took to get their, and as well as much experience from many, many other users (including myself) that you need a minimum of 20 cells (which roughly equals 20 cells) to reach the 60 mph..

Somehow you don't bother what experience others have, do you?

Serum · 12.04.2006, 01:45 PM

Who are you to question the things others measured/experienced?

Again, i told you, either your setup was taking more, or the speed wasn't 50 mph... (that was the reason why i asked you WHAT did you use to measure them..) Not to put your story down, but to get to the facts..

glassdoctor · 12.04.2006, 01:47 PM

Promod has hit 50 in a EMaxx on 12cells with I believe an 8L. I have no idea how this fits into the discussion but it seems applicable.