4 Blade

[rcaerobob at cox.net]

My personal experience with hoppers - from the ST 2300 days - is that they work JUST FINE. Don't know the theory, either, but my intuition tells me that being that much closer to the carb simply makes it that much easier for the carb to draw using it's own venturi suction.  Easier to suck over a shorter distance.  (Although sometimes things can suck over a longer distance, too)

I abandoned the header because of the pipe pressure line, extra fuel tubing requirements, concerns over more possible failure points.  My Perry pump accomplishes the tank on CG, and adds only 1.3 oz overall.  That's less than my header tank and extra plumbing setups weighed.

If weight not an issue, and you can locate the header tank on the centerline of the spraybar, Go for it!!!  IT WORKS.

Bob P.
> 
> From: Brian Young <b.young8070 at sbcglobal.net>
> Date: 2004/08/12 Thu PM 12:58:06 EDT
> To: discussion at nsrca.org
> Subject: Re: 4 Blade
> 
> Yes, that hopper tank has bugged me since it came up. Theory says it shouldnt improve the fuel draw, but in practice it must work. Maybe its the line loss that causes the problem and an extra large fuel tube to the engine would be good enough to mount the tank nearer the CG. hmmmmm
> 
> Nat Penton <natpenton at centurytel.net> wrote:Dave,
> An aclimation phase and a learning phase and some money! On another subject, the physics say a hopper tank is of no value. What do you think? Is there a momentary value? Karl - bypass the hopper tank and report!      Nat
>  
> 
> 
> 

Bob Pastorello, El Reno, OK, USA
rcaerobob at cox.net
www.rcaerobats.net

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