KR> Re: tubular wing tanks
in my experience PVC is not a good male mold. Hard to separate. Cardboard shipping tubes on the other hand are perfect. Once Composite sets, a few minute soak in a bath tub, and the tube separates and peals off. "Forgive me if this is an ignorant idea, but has anyone considered laying up fiberglass tube tanks using PVC pipe as a male mold? Edward Spyker"
KR> Re: tubular wing tanks
If you did ... the technique for getting the PVC pipe out is as follows. To allow the glass to release over a long run first lay a single layer of light glass over the PVC and let it cure. Cut through this layer and move it around till it is released down the full length then reposition where you started. This is now ready for the final layers of glass for easy removal of the pipe. All you need to do now is fill in the ends. I'm going to use this technique for CF torque tubes. Paul. Edward Spyker wrote: = Forgive me if this is an ignorant idea, but has anyone considered laying up fiberglass tube tanks using PVC pipe as a male mold?
KR> Re: tubular wing tanks
Forgive me if this is an ignorant idea, but has anyone considered laying up fiberglass tube tanks using PVC pipe as a male mold? Edward Spyker Glenda McElwee wrote: Bill Clapp has developed an alum.version of his original PVC tanks. I have the same PVC tanks in my wings. Alum tanks will affect embedded antennas in the wings. --- On Mon, 4/26/10, Ronald Wright wrote: I want to use METAL irrigation tubing. The plastic bothers me because it gets brittle in cold weather, plus the info you provided below on weeping. --- On Sat, 4/24/10, smwood wrote: > Bill Clapp http://www.krnet.org/krs/wc/ used 4-inch PVC pipe, 2 > each joined > together at both ends running from the WAF to the end of > the wing and same > for the other side. > Ron wrote:-- > Does anyone remember who used irrigation tubing for wing > tanks in their KR? > Anyone know the material that the irrigation tubing is or > the size? > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Re: tubular wing tanks
Bill Clapp has developed an alum.version of his original PVC tanks. I believe he still has the PVC tanks in his plane. Most people have not noticed any smell from fuel unless the tank is full and the vent is overflowing. I have the same PVC tanks in my wings. Alum tanks will affect embedded antennas in the wings. Glenda McElwee CFI www.AwesomeTrvl.com KI4RDQ - General Class N51GL - in progress Corvair powered KR2 exp_aviat...@lists.awesometrvl.com --- On Mon, 4/26/10, Ronald Wright wrote: From: Ronald Wright Subject: Re: KR> Re: tubular wing tanks To: "KRnet" List-Post: krnet@list.krnet.org Date: Monday, April 26, 2010, 11:02 AM I want to use METAL irrigation tubing. The plastic bothers me because it gets brittle in cold weather, plus the info you provided below on weeping. Sloshing is NOT an issue in a tubular tank. The Yankees uses long tubular tanks and they do not have any baffles installed. Thanks, Ron --- On Sat, 4/24/10, smwood wrote: > From: smwood > Subject: KR> Re: tubular wing tanks > To: kr...@mylist.net > Date: Saturday, April 24, 2010, 6:00 PM > Bill Clapp http://www.krnet.org/krs/wc/ used 4-inch PVC pipe, 2 > each joined > together at both ends running from the WAF to the end of > the wing and same > for the other side. Bill had removable wing tips for > inspection. He had no > fuel gauge senders in the PVC pipes, but a 13-gallon header > tank at the > instrument panel with a tube sight gauge on the > panel. Electric pumps on > each side took fuel from the PVC pipes and dumped into the > header tank. > Then gravity feed to the engine. Fuel would slowly > weep through the PVC; > you could always smell gasoline fumes in the outer wing. > One problem with using pipe for a fuel tank is sloshing > during maneuvers and > turbulence. Bill put fuel cell foam in the pipes. > I did an experiment with PVC pipe. I filled a section > of 1-1/2 inch PVC > with gasoline with both ends glued tight. It took > about 6 months for all > the gasoline to evaporate. > I did the same experiment with a section of 4-inch vinyl > fence post with > both ends glued on caps and about half full of fuel. > I weigh the vinyl > fence post tank once in a while. All the gasoline is > still in the vinyl > fence post after 4 years. I cannot say what condition the > fuel is in since > the tank is sealed, but it still sloshes like fuel. I will > bring the vinyl > fence post tank to the Gathering for your examination. > > Sid Wood > Tri-gear KR-2 N6242 > Mechanicsville, MD, USA > smw...@md.metrocast.net > -- > Does anyone remember who used irrigation tubing for wing > tanks in their KR? > Anyone know the material that the irrigation tubing is or > the size? > > Thanks, > > Ron > > > > > > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Re: tubular wing tanks
On 04/26/2010 11:02 AM, Ronald Wright wrote: > Sloshing is NOT an issue in a tubular tank. The Yankees uses long tubular > tanks and they do not have any baffles installed. I'm not sure if this will make any difference with regards to "slosh", but I believe the Yankee has a steeper wing dihedral than the KR. KR: http://home.hiwaay.net/~langford/kjhf1.jpg Yankee: http://cad-mastergraphics.com/images/Yankee/2007_1020Image0010.JPG -Dj -- Dj Merrill - N1JOV Glastar Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/ Grumman Yankee Driver N9870L - http://deej.net/yankee/
KR> Re: tubular wing tanks
I want to use METAL irrigation tubing. The plastic bothers me because it gets brittle in cold weather, plus the info you provided below on weeping. Sloshing is NOT an issue in a tubular tank. The Yankees uses long tubular tanks and they do not have any baffles installed. Thanks, Ron --- On Sat, 4/24/10, smwood wrote: > From: smwood > Subject: KR> Re: tubular wing tanks > To: kr...@mylist.net > Date: Saturday, April 24, 2010, 6:00 PM > Bill Clapp http://www.krnet.org/krs/wc/ used 4-inch PVC pipe, 2 > each joined > together at both ends running from the WAF to the end of > the wing and same > for the other side. Bill had removable wing tips for > inspection. He had no > fuel gauge senders in the PVC pipes, but a 13-gallon header > tank at the > instrument panel with a tube sight gauge on the > panel. Electric pumps on > each side took fuel from the PVC pipes and dumped into the > header tank. > Then gravity feed to the engine. Fuel would slowly > weep through the PVC; > you could always smell gasoline fumes in the outer wing. > One problem with using pipe for a fuel tank is sloshing > during maneuvers and > turbulence. Bill put fuel cell foam in the pipes. > I did an experiment with PVC pipe. I filled a section > of 1-1/2 inch PVC > with gasoline with both ends glued tight. It took > about 6 months for all > the gasoline to evaporate. > I did the same experiment with a section of 4-inch vinyl > fence post with > both ends glued on caps and about half full of fuel. > I weigh the vinyl > fence post tank once in a while. All the gasoline is > still in the vinyl > fence post after 4 years. I cannot say what condition the > fuel is in since > the tank is sealed, but it still sloshes like fuel. I will > bring the vinyl > fence post tank to the Gathering for your examination. > > Sid Wood > Tri-gear KR-2 N6242 > Mechanicsville, MD, USA > smw...@md.metrocast.net > -- > Does anyone remember who used irrigation tubing for wing > tanks in their KR? > Anyone know the material that the irrigation tubing is or > the size? > > Thanks, > > Ron > > > > > > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html >
KR> RE: Tubular wing tanks
Bill I am putting aluminum tubes, 2 - 3" & 2 - 4" tubes plus tip tanks on my KR1. I did not have any welding equip. So I am having Hevlee Aviation put it together. They should be ready just about any time no. When I get in my hands. I will take some pictures and let everyone see the work. Oh yes. I am butting on some clam shell wheel covers in hopes to gain a little speed. Just a little note as to what is going on in the Tehachapi area. M. Greg Martin On 4/24/10, robert7...@aol.com wrote: > Ron, > > Bill Clapp has the PVC tubes in his wing tanks. Not sure it was irrigation > tubing. Pretty sure Bill just used PVC and it looked like 2 each 3 " > tubes. > > Not sure I would recommend PVC, might think about using aluminum tube > instead. > > Rob Schmitt > N1852Z > >
KR> RE: Tubular wing tanks
Ron, Bill Clapp has the PVC tubes in his wing tanks. Not sure it was irrigation tubing. Pretty sure Bill just used PVC and it looked like 2 each 3 " tubes. Should be able to find pictures and details of it somewhere on Mark Langford's site on one of the KR Gathering photos collections. Probably 2004 or 2005. Not sure I would recommend PVC, might think about using aluminum tube instead. Rob Schmitt N1852Z List-Post: krnet@list.krnet.org Date: Thu, 22 Apr 2010 21:07:03 -0700 (PDT) From: Ronald Wright Subject: KR> tubular wing tanks To: KRnet Message-ID: <448898.64012...@web180409.mail.gq1.yahoo.com> Content-Type: text/plain; charset=us-ascii Does anyone remember who used irrigation tubing for wing tanks in their KR? Anyone know the material that the irrigation tubing is or the size? Thanks, Ron
KR> Re: tubular wing tanks
Bill Clapp http://www.krnet.org/krs/wc/ used 4-inch PVC pipe, 2 each joined together at both ends running from the WAF to the end of the wing and same for the other side. Bill had removable wing tips for inspection. He had no fuel gauge senders in the PVC pipes, but a 13-gallon header tank at the instrument panel with a tube sight gauge on the panel. Electric pumps on each side took fuel from the PVC pipes and dumped into the header tank. Then gravity feed to the engine. Fuel would slowly weep through the PVC; you could always smell gasoline fumes in the outer wing. One problem with using pipe for a fuel tank is sloshing during maneuvers and turbulence. Bill put fuel cell foam in the pipes. I did an experiment with PVC pipe. I filled a section of 1-1/2 inch PVC with gasoline with both ends glued tight. It took about 6 months for all the gasoline to evaporate. I did the same experiment with a section of 4-inch vinyl fence post with both ends glued on caps and about half full of fuel. I weigh the vinyl fence post tank once in a while. All the gasoline is still in the vinyl fence post after 4 years. I cannot say what condition the fuel is in since the tank is sealed, but it still sloshes like fuel. I will bring the vinyl fence post tank to the Gathering for your examination. Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA smw...@md.metrocast.net -- Does anyone remember who used irrigation tubing for wing tanks in their KR? Anyone know the material that the irrigation tubing is or the size? Thanks, Ron