<DIV>I basically agree w/ you. But I think the comment Dave L has made in his last couple of questions makes sense.</DIV>
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<DIV>Im just bored and need something to do while im waiting for the delivery truck to show up. ;)</DIV>
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<DIV>Bob...we would Never ignore you.....lol</DIV>
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<DIV><BR><B><I>rcaerobob@cox.net</I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">I know everyone ignored my first response about this - but I think it deserves consideration, guys. The hopper setup probably WORKS simply because it is closer to the suction source (proximity to the spraybar/venturi). Being closer, it is easier for the engine to "draw" the fuel.<BR><BR>I really don't think there's a lot more to this issue than suction.<BR><BR>Bob P.<BR>Pump-running-non-suction OS user and ARF flier<BR>> <BR>> From: Brian Young <B.YOUNG8070@SBCGLOBAL.NET><BR>> Date: 2004/08/13 Fri AM 08:52:12 EDT<BR>> To: discussion@nsrca.org<BR>> Subject: Re: hopper theory & practice<BR>> <BR>> Dave I think that your last couple of questions are what occur. If someone would put one in a hover for a few minutes to setup equilibrium it should lean once replenishment from the main tank becomes established in the new orientation, anyone want to try that?
;)<BR>> <BR>> <BR>> ronlock@comcast.net wrote:<BR>> <BR>> Ive been a hopper tank diss-believer for years. I also wonder why many continue to report benefits. What's responsible for the benefit?<BR>> <BR>> I'm in agreement with Nat, and what "I think" Jerry has said regarding the fuel system with a FULL hopper tank being a column of fluid, and the hopper would have no benefit.<BR>> <BR>> Maybe hopper serves to eliminate foaming and bubbles? Do I understand heli pilots use hoppers for that reason?<BR>> <BR>> In practice do we usually have some air in the hopper? Or do we usually have a hopper tank that is flexible? Might we be drawing from the hopper without replenishing from the main tank during a vertical? Then the hopper gets replenished during level lines?<BR>> <BR>> Still wondering, Ron Lockhart<BR>> -------------- Original message -------------- <BR>> <BR>> > >Matt, <BR>> > >With or without the hopper tank we still
have a solid column of <BR>> > >incompressible fluid for gravity and G's to play its tricks on. I <BR>> > >contend if it runs ok with the hopper it will run just as well <BR>> > >without. Nat <BR>> > <BR>> > Nat, <BR>> > <BR>> > While not exactly accurate as stated, your point is well taken. Your <BR>> > hypothesis has some merit when the tank is full, but it falls short <BR>> > anytime else (which is most of the flight). Adding just a small <BR>> > amount of air causes the system to become compressible (just like the <BR>> > brakes on your car). <BR>> > <BR>> > Jerry <BR>> > -- <BR>> > ___________ <BR>> > Jerry Budd <BR>> > mailto:jbudd@qnet.com <BR>> > ===================================== <BR>> > # To be removed from this list, go to http://www.nsrca.org/discussionA.htm <BR>> > and follow the instructions. <BR>> > <BR>> <BR><BR>Bob Pastorello,
El Reno, OK, USA<BR>rcaerobob@cox.net<BR>www.rcaerobats.net<BR><BR>=====================================<BR># To be removed from this list, go to http://www.nsrca.org/discussionA.htm<BR>and follow the instructions.<BR><BR></BLOCKQUOTE>