Brushless EDF Tamiya F103GT

[suicideneil]

Originally Posted by B15

I think youre going to have this problem anyway; if that fan can produce 5lbs of thrust, its going to be accelerating at well over 1g. The rear wheels wont be able to decelerate it anywhere near that hard.

Provided power to the fan was cut at the same time the mechanical brakes were applied, that should slow the car down pretty quickly. I would have thought quicker than with a normal motor & gear driven car since there isnt the need to slow any rotating mass of the the motor/transmission down before the brakes kick in. If you had a strong enough brake you could lock up the rear wheels and skid the car to a stop rather quickly I'd have thought- useful for emergency stops...

[Patrick]

It doesn't need brakes for emergency stops. You hit the third channel button and little wings pop out the side, then you just fly over whatever was in the way.

[What's_nitro?]

Maybe someday the project will be that advanced. I think I would need a larger chassis to fit everything.

The problem with stopping this thing is going to be that tires cant accelerate/ decelerate a car with much more force than is being pushed down on the tires (weight of the vehicle). The fan is going to be accelerating it quite a bit faster than tires would be able to, so its going to need more room to slow down than to accelerate.

[What's_nitro?]

[green24]

Holy Crap! !!! That thing has a ton of power! That should be awesome to see going, please try and get a video of you driving it around soon!

[What's_nitro?]

I'm still putting together ideas for the brake setup. It may be a while before I make an outdoor video, unless I decide to blow the leaves out of my yard.

Those tires in the video are Proline Speed Hawg II's which should help prevent skidding during deceleration.

[aqwut]

I'm all excited to see this thing go...

[Mallanaga]

all i know is that it's going to accelerate like nobody has ever seen...

[What's_nitro?]

Please state whether you think I should take this project to new heights:

Exhibit A: Ofna 1/8 Ultra GTP ARR Chassis

Exhibit B: There is no exhibit B.

I'm toying with the idea of buying one of these and putting two (what did he just say?) of the 90mm EDF units on it. Each with it's own Feigao 8XL since I really think the fan is capable of much more that a 9XL can attest to. The BIG plus here is the pre-installed brake system. Two MM's for control (possible thrust variance in corners?) and, since the fan blade weighs nothing, I can probably use the same MaxAmps Batteries (4s 4000mAh) in parallel for 160A total continous output. Although I really dont think I'll need anywhere near that amount of power.

[What's_nitro?]

Originally Posted by What's_nitro?

Please state whether you think I should take this project to new heights:

Exhibit A: Ofna 1/8 Ultra GTP ARR Chassis

Exhibit B: There is no exhibit B.

I'm toying with the idea of buying one of these and putting two (what did he just say?) of the 90mm EDF units on it. Each with it's own Feigao 8XL since I really think the fan is capable of much more that a 9XL can attest to. The BIG plus here is the pre-installed brake system. Two MM's for control (possible thrust variance in corners?) and, since the fan blade weighs nothing, I can probably use the same MaxAmps Batteries (4s 4000mAh) in parallel for 160A total continous output. Although I really dont think I'll need anywhere near that amount of power.

DO IT!!!

Originally Posted by What's_nitro?

Please state whether you think I should take this project to new heights:

Exhibit A: Ofna 1/8 Ultra GTP ARR Chassis

Exhibit B: There is no exhibit B.

I'm toying with the idea of buying one of these and putting two (what did he just say?) of the 90mm EDF units on it. Each with it's own Feigao 8XL since I really think the fan is capable of much more that a 9XL can attest to. The BIG plus here is the pre-installed brake system. Two MM's for control (possible thrust variance in corners?) and, since the fan blade weighs nothing, I can probably use the same MaxAmps Batteries (4s 4000mAh) in parallel for 160A total continous output. Although I really dont think I'll need anywhere near that amount of power.

YES! If you could swing it! Funny thing is that I clicked the link before reading your entire post and said to myself "Wouldn't it be cool if he put two fans on that thing..."

[What's_nitro?]

I did it. He made me do it. >>>

I have a "Get well soon" card for my wallet that I'll need all of you to sign.

What about a feigao 10L? I run one in my crt.5ext and without pushing it I get 1100+ watts out of it on 4s. The 8xl might me good too but I think the idea of a lighter, slightly faster spinning motor would benefit you...

Bye

[What's_nitro?]

Well the thing with fans is that for a given thrust figure, the fan is required to rotate at a finite speed. At a given speed, the fan requires a finite amount of power to maintain that speed. If I were to use a smaller motor it would still use the same amount of power and run at the same speed to produce the same amount of thrust as a larger motor. That larger motor, however, would run much cooler. If the smaller motor were made to run at higher speed it would create more thrust but also require much more power. One of these days I'll get a wattmeter and see how much power it's actually taking to make this thing go.