Pietenpol-List: Split Gear Tubing Size-Fuselage Height

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Pietenpol-List: Split Gear Tubing Size-Fuselage Height

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Original Posted By: "Jack T. Textor"

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Pietenpol-List: Re: Split Gear Tubing Size-Fuselage Height

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Original Posted By: "Bill Church"
Jack,.080 in both cases. Did you try Dillsburg Aero for the 1 3/8"?Aesthetics aside.....the positives of the higher gear is increased deck angle andmore clearance.....the negative is entry. You may need to position your fusein space and see if you can swing a leg over. I cant, so will put in a "horseshoe"step ala Jenny. It's even worse for the passenger. Make triple sure you stagger the gear strut attach tabs on the inboard axle endsas wide as you can. The dims per print are too close and the gear hits whereit crosses unless you go cub style. I would go full forward on one and full backon the other.--------PAPA MIKERead this topic online here:http://forums.matronics.com/viewtopic.php?p=269993#269993 ________________________________________________________________________________Subject: Pietenpol-List: Re: Split Gear Tubing Size-Fuselage Height

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Post by matronics »

Original Posted By: "gcardinal"
Jack,With regard to the steel tubing, for 14ga, you would be looking for .083 wall thickness.Metal gauges are confusing, to say the least. Looks like you're referencingthe wrong gauge chart, which is not hard to do. There are numerous differentgauge systems, and which one to use depends on what material you are dealingwith, as well as what part of the world you are in. I've attached a coupleof reference charts. One is specifically for steel tubing (which uses the BirminghamWire gauge), and the other chart references 5 different gauge systems,with the related materials. Now, with respect to the flat plate, I have no idea what gauge system is used for4130 sheet. I haven't been able to track down a gauge chart that matches thethicknesses that 4130 is offered in. The most commonly used gauge table forsheet steel is the Manufacturers Standard Gauge, for which 14ga = .074. I'd gowith the .080" thickness on that one.As for the fuselage height, Don Emch or Walt Evans hopefully should be able toprovide some "real world" info regarding split gear with skinny wheels. Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.php?p=269994#269994Attachments: http://forums.matronics.com//files/sheet_metal_gauges_147.pdfhttp://forums.matronics.com//files/steel_tube_gauges_150.pdf ________________________________________________________________________________

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Re: Pietenpol-List: Re: Split Gear Tubing Size-Fuselage Height

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Original Posted By: "Bill Church"
For a good gage-to-thickness chart go to:http://www.westcoastpiet.com/gage_to_thickness_chart.htmGreg C.----- Original Message -----

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Pietenpol-List: Re: Split Gear Tubing Size-Fuselage Height

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Original Posted By: Lawrence Williams

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Pietenpol-List: Re: Split Gear Tubing Size-Fuselage Height

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Original Posted By: "Don Emch"
Hey Michael... I say you take all your garbage and test the yield strength. Report back to us with your findings. Err, on the other hand, nevermind.--------Mark - working on wingsRead this topic online here:http://forums.matronics.com/viewtopic.php?p=270150#270150 ________________________________________________________________________________Subject: Pietenpol-List: Re: Split Gear Tubing Size-Fuselage Height

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Post by matronics »

Original Posted By: "Jack"
Jack,When I ordered my tubing for the V's I somehow ordered .095" tubing. I didn'tbother to send it back and went ahead and made them up. So mine are actually.095" wall thickness. The correct tubing size would have been the .080". I supposeI added an extra pound or so, oh well. The other fittings I think I convertedto the .080". When I would see 13 ga. in the plans I used .090" thickness.Definitely stagger those mounting tabs for the diagonal shock struts asfar as you can. Mine are close but only touch each other when they extend tothe end of their travel. As far as the length, or height of the V's, I madethem just as they are on the plans. Although I got a little nervous about theposition of the axle fore and aft when using brakes. Mr. Pietenpol made onewith the axle 4" inches forward. He said that was maybe too much and to placeit about 2" forward if using brakes. I use brakes and moved the axle 1" forward.The height is still the same. I didn't want to get too far from the plansand I didn't plan to use the brakes for more than slow taxi. Anyway, it seemsto have worked out well. I'm sure leaving it back an inch would be aboutthe same. With my tall wheels I'm definitely kinda high in the 3-point. Butthen I have long legs! Mr. Pietenpol built an AirCamper, number 12988, that hadthe same configuration as mine. Split axle with the wire wheels. I likedthe look of it, so that's what I was striving for. I have put the gear througha fair amount of abuse! (Might have even been a ground loop in there, sshhhh...) It's really a stout little airplane!For those that aren't very familiar with the tubing style of gear, here are a fewshots;http://westcoastpiet.com/images/Don%20Emch/Brodhead__20070720_144.JPGhttp://westcoastpiet.com/images/Don%20Emch/Brodhead__20070720_147.JPGhttp://westcoastpiet.com/images/Don%20Emch/Brodhead__20070720_095.JPGRead this topic online here:http://forums.matronics.com/viewtopic.php?p=270158#270158 ________________________________________________________________________________

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Pietenpol-List: Re: Split Gear Tubing Size-Fuselage Height

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Original Posted By: TOM MICHELLE BRANT
Don,Thanks for the great pictures and comments! Your comments and others on theshock struts were a good call. I'm doing spring shocks and wondering if thesprings will touch even though I stagger the mounts as much as possible?JackDSMSubject: Pietenpol-List: Re: Split Gear Tubing Size-Fuselage HeightJack,When I ordered my tubing for the V's I somehow ordered .095" tubing. Ididn't bother to send it back and went ahead and made them up. So mine areactually .095" wall thickness. The correct tubing size would have been the.080". I suppose I added an extra pound or so, oh well. The other fittingsI think I converted to the .080". When I would see 13 ga. in the plans Iused .090" thickness. Definitely stagger those mounting tabs for thediagonal shock struts as far as you can. Mine are close but only touch eachother when they extend to the end of their travel. As far as the length, orheight of the V's, I made them just as they are on the plans. Although Igot a little nervous about the position of the axle fore and aft when usingbrakes. Mr. Pietenpol made one with the axle 4" inches forward. He saidthat was maybe too much and to place it about 2" forward if using brakes. Iuse brakes and moved the axle 1" forward. The height is still the same. Ididn't want t! o get too far from the plans and I didn't plan to use the brakes for morethan slow taxi. Anyway, it seems to have worked out well. I'm sure leavingit back an inch would be about the same. With my tall wheels I'm definitelykinda high in the 3-point. But then I have long legs! Mr. Pietenpol builtan AirCamper, number 12988, that had the same configuration as mine. Splitaxle with the wire wheels. I liked the look of it, so that's what I wasstriving for. I have put the gear through a fair amount of abuse! (Mighthave even been a ground loop in there, sshhhh...) It's really a stoutlittle airplane!For those that aren't very familiar with the tubing style of gear, here area few shots;http://westcoastpiet.com/images/Don%20Emch/Brodhead__20070720_144.JPGhttp://westcoastpiet.com/images/Don%20Emch/Brodhead__20070720_147.JPGhttp://westcoastpiet.com/images/Don%20Emch/Brodhead__20070720_095.JPGRead this topic online here:http://forums.matronics.com/viewtopic.php?p=270158#270158Checked by AVG - www.avg.com 19:57:00 ________________________________________________________________________________

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> Pietenpol-List: Re: Split Gear Tubing Size-Fuselage Height

Post by matronics »

Original Posted By:> EmchAir(at)aol.com
Thanks Don - I'm strongly considering the tube gear with wheels like yours (covered). Could you help with how you did the covered wheels? I was originally thinking aluminum covers but had seen someone suggest putting the fabric all the way down to where the bead of the tire contacts (inside the rim). Is this how you did it?Thanks=2CTom B.> Subject: Pietenpol-List: Re: Split Gear Tubing Size-Fuselage Height

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> Pietenpol-List: Re: Welding exhaust systems

Post by matronics »

Original Posted By:> tkreiner(at)gmail.com
Don't forget to clean up your grinder when grinding aluminum and switching to steel. Aluminum and steel filings alowed to sit together can ignite and cause a flash fire of several thousand F BTW- You also said that Ti ignites a burns at about 2=2C200F. Not true. It's melting point is above steel. But you are correct in that it cannot be torch welded. Reacts severely in the presence of oxygen.Doug DeverIn beautiful Stow Ohio> Subject: Pietenpol-List: Re: Welding exhaust systems

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Post by matronics »

Original Posted By: Doug Dever
> To: pietenpol-list(at)matronics.com> > > Jack=2C> When I ordered my tubing for the V's I somehow ordered .095" tubing. I didn't bother to send it back and went ahead and made them up. So mine are actually .095" wall thickness. The correct tubing size would have been the .080". I suppose I added an extra pound or so=2C oh well. The other fittings I think I converted to the .080". When I would see 13 ga. in the plans I used .090" thickness. Definitely stagger those mounting tabs for the diagonal shock struts as far as you can. Mine are close but only touch each other when they extend to the end of their travel. As far as the length=2C or height of the V's=2C I made them just as they are on the plans. Although I got a little nervous about the position of the axle fore and aft when using brakes. Mr. Pietenpol made one with the axle 4" inches forward. He said that was maybe too much and to place it about 2" forward if using brakes. I use brakes and moved the axle 1" forward. The height is still the same. I didn't want t!> o get too far from the plans and I didn't plan to use the brakes for more than slow taxi. Anyway=2C it seems to have worked out well. I'm sure leaving it back an inch would be about the same. With my tall wheels I'm definitely kinda high in the 3-point. But then I have long legs! Mr. Pietenpol built an AirCamper=2C number 12988=2C that had the same configuration as mine. Split axle with the wire wheels. I liked the look of it=2C so that's what I was striving for. I have put the gear through a fair amount of abuse! (Might have even been a ground loop in there=2C sshhhh...) It's really a stout little airplane!> > For those that aren't very familiar with the tubing style of gear=2C here are a few shots=3B> > http://westcoastpiet.com/images/Don%20Emch/Brodhead__20070720_144.JPG> > http://westcoastpiet.com/images/Don%20Emch/Brodhead__20070720_147.JPG> > http://westcoastpiet.com/images/Don%20Emch/Brodhead__20070720_095.JPG> > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.php?p=270158#270158> > > > > > > ============================================> > > ________________________________________________________________________________

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Re: Pietenpol-List: Re: Welding exhaust systems

Post by matronics »

Original Posted By: "John Recine"
> To: pietenpol-list(at)matronics.com> > > Guys=2C> > 'Twas I who mentioned that an oxyacetylene torch SHOULD NEVER BE USED to weld or attempt to weld Titanium. Like a magnesium fire=2C a Titanium fire is extremely difficult to put out=2C with the added problem=2C that=2C when doused with water=2C it will strip Oxygen from the water=2C resulting in a Hydrogen fire/explosion.> > >From Wikipedia (citations removed):> > In terms of fabrication=2C all welding of titanium must be done in an inert atmosphere of argon or helium in order to shield it from contamination with atmospheric gases such as oxygen=2C nitrogen=2C or hydrogen.> > And:> > As a powder or in the form of metal shavings=2C titanium metal poses a significant fire hazard and=2C when heated in air=2C an explosion hazard. Water and carbon dioxide-based methods to extinguish fires are ineffective on burning titanium=3B Class D dry powder fire fighting agents must be used instead.> > When used in the production or handling of chlorine=2C care must be taken to use titanium only in locations where it will not be exposed to dry chlorine gas which can result in a titanium/chlorine fire. A fire hazard exists even when titanium is used in wet chlorine due to possible unexpected drying brought about by extreme weather conditions.> > Titanium can catch fire when a fresh=2C non-oxidized surface comes in contact with liquid oxygen. Such surfaces can appear when the oxidized surface is struck with a hard object=2C or when a mechanical strain causes the emergence of a crack. This poses the possible limitation for its use in liquid oxygen systems=2C such as those found in the aerospace industry.> > Additional info may be found here:> > http://www.tms.org/pubs/journals/JOM/0005/Poulsen-0005.html> > Bottom line: don't mess with Titanium at home=2C unless you're properly equipped.> > --------> Tom Kreiner> > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.php?p=270139#270139> > > > > > > ============================================> > > _________________________________________________________________Windows 7: I wanted more reliable=2C now it's more reliable. Wow!http://microsoft.com/windows/windows-7/default-ga.aspx?h=myidea?ocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_myidea:102009 ________________________________________________________________________________Subject: Re: Pietenpol-List: Re: Welding exhaust systems

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