My New Project Car - RC-Monster Forums

MetalMan · 07:35 PM

The ducted fan idea won't work. I know from experience. A year or two ago I tried it with a 4" ducted fan with a Feigao 12XL and 24v 14Ah lead acid, running through a CC Phoenix 60 ESC. I even went as far as hooking up the ducted fan unit to my Camry's intake, along with a pressure gauge attached. At idle the maximum pressure it recorded was 1/2 PSI...

And if you did go with a higher RPM the ducted fan unit likely won't handle it unless you spend $200+ on it. For larger ducted fans they usually can't spin much faster than 30-40k RPM without self-destructing.

You are familiar with the design of a turbo, correct? It is a turbine, and designed to create pressure. The purpose of a ducted fan is to create thrust, not pressure. This is the main reason why this idea is not likely to work (unless you have hundreds of $$ to spend on really high quality stuff).

Takedown · 03.24.2009, 07:43 PM

Im willing to spend a good amount to get atleast 2psi from it. If I get a blade with enough angle that will add thrust but intern slow the motors rpms. I think it may be worth a shot atleast. I may double the ducted fans aswell so that the one behind the first one will take all of the moving air from the first ducted fan and shoot it out even faster. 'higher kv motor for the 2nd stage ducted fan motor'.

lincpimp · 03.24.2009, 08:54 PM

Quote:

Originally Posted by Takedown

Im willing to spend a good amount to get atleast 2psi from it. If I get a blade with enough angle that will add thrust but intern slow the motors rpms. I think it may be worth a shot atleast. I may double the ducted fans aswell so that the one behind the first one will take all of the moving air from the first ducted fan and shoot it out even faster. 'higher kv motor for the 2nd stage ducted fan motor'.

they already market these things. they are basically viewed as junk, and as metalman said they will not flow enough to create any pressure. if you want cheap thrills, blow 500 bucks on a simple 75hp nitrous setup. a universal zex setup should do. nothing cheaper, even if you fill the bottle fequently. and you do not have to live with the decreased mpg when you do not use it.