Return-Path: Received: from mordor.vnet-inc.com ([216.129.224.17] verified) by logan.com (CommuniGate Pro SMTP 4.1b7) with ESMTP-TLS id 2407397 for flyrotary@lancaironline.net; Sun, 08 Jun 2003 08:36:33 -0400 Received: (qmail 83344 invoked by uid 89); 8 Jun 2003 12:36:16 -0000 Received: from unknown (HELO Powly) (216.220.26.84) by mordor.vnet-inc.com with SMTP; 8 Jun 2003 12:36:15 -0000 Message-ID: <200306080636050160.000E6A87@smtp.ttc-cmc.net> In-Reply-To: References: X-Mailer: Calypso Version 3.20.02.00 (3) Date: Sun, 08 Jun 2003 06:36:05 -0600 From: "Stone Tool" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Fuel Header Tank Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Perry: You are right about weldability.. 2024 absolutely cannot be successfully= welded........ It is not difficult to weld aluminum with the proper= rod using acetylene if you want to do it yourself. The tricks are....= clean clean clean..... and to remember that the oxide on the surface has a= considerably higher melting point than the aluminum itself... the result= is that you have to push the filler through the oxide. I use tig now= that I have it but that is not quite like welding steel either. Aluminum= carries the heat away from your work so quickly that heavy material= requires a shocking amount of amperage. What I was going to say however is that there is a filler metal available= for aluminum which looks like aluminum but is something else that allows= you to easily repair and "weld" aluminum so long as you keep the surface= clean. The process would probably more properly be called "brazing" or= something than welding, as the base metal never becomes molten because= this stuff has a much lower melting point. The process is easy but again= clean clean clean is the mantra as with any Aluminum process. I would= encourage anybody who has a spirit of adventure to experiment with= aluminum welding.... it is an interesting experience. The lack of color= change makes it quite different. Good protection from the reflected UV is= necessary when doing any arc process....there is a lot of energy reflected= back at you. H.W. *********** REPLY SEPARATOR *********** On 6/7/03 at 7:33 AM Perry Mick wrote: >Paul, that is where my sump tank is located, on the firewall below the >spar opposite side from the engine. Originally it was on the engine >side, so I made it out of steel. Holds about 1 gallon and has two Mazda >fuel pumps inside, fuel return is to this sump tank like Ed's. The >selected main flows to this sump tank by gravity so it is mounted low. > >Maybe you can find a local welder in your area that can weld aluminum. I >found a guy near me that does. I take water pump parts, intake manifold >parts, etc. to him for welding. I just tell him they are for my RX-7. >Design it yourself, get the sheet aluminum, cut out the pieces, and take >it to the welder. I think 6061 is good for welding but 2024 is not. > >sqpilot@earthlink wrote: > >> Hi, Ed.....thanks very much for the information regarding the fuel >> tank header. That's exactly what I need. Unfortunately, I'm not a >> welder. Since I'm building a canard pusher, I plan on installing the >> fuel sump/header tank on the firewall on the side opposite of the >> engine. That is where my strake tank fuel lines lead to, and it should >> be considerably cooler just under the main wing spar. If there are >> any welders out there that might want to tackle this project, I'd like >> to talk to you. I'd feel much better paying someone to do this right >> than attempt it myself. Thank you. Paul Conner >> sqpilot@earthlink.net >> >> ----- Original Message ----- >> From: Ed Anderson >> To: Rotary motors in aircraft >> Sent: Thursday, June 05, 2003 5:54 PM >> Subject: [FlyRotary] Re: Fuel Header Tank >> >> Hi Paul, >> >> My rectangular header tank was home made out of a piece of 3 >> 1/2 x 1 1/2 x 8" rectangular aluminum tubing caped with aluminum >> plate. Welded in AN fittings for fuel inlets and outlets. Has >> worked well for me, eliminating the need for a return line to the >> wing tanks. However, being under the cowl is not the best >> location for it. Picks up heat and with auto gas has shown signs >> of fuel perculation on hot days. I have a cool air blast tube >> cooling it as well as a low pressure boost pump that provides >> enough pressure to keep it from purculating on a hot day. Better >> location might have been the wing root location. >> >> Ed Anderson >> >> ----- Original Message ----- >> From: sqpilot@earthlink >> To: Rotary motors in aircraft >> >> Sent: Thursday, June 05, 2003 6:18 PM >> Subject: [FlyRotary] Fuel Header Tank >> >> I was surfing the net regarding 13B engine installations, and >> I found some pictures of Ed Anderson's installation which >> showed a rectangular aluminum header tank next to the fuel >> pumps. Anyone know if this is commercially available, or home >> grown? Ed ??? Thanks in advance for your replies. Paul >> Conner, 13B powered SQ2000. Engine installed, trying to hook >> everything up. >>