Brodhead Pietenpol Association

Original Posted By: "wheelharp"
Ralph I did the same thing. I've heard some of the older sets threads varied. It was important to keep them together as matched sets...Sent from my iPadJack Textor> On Apr 7, 2016, at 2:53 PM, Ralph wrote:> > Early on in my Piet build I bought a large number of used turnbuckles at Oshkosh. A couple years ago I took one of the end forks with me to Oshkosh to be sure and get the correct size pins for the fork end. Now that I am assembling the tail pieces I find I have misplaced the fork end to one of the turnbuckles. I located a supple of used turnbuckles locally but can=99t find one of the same thread pitch. I found one of the same diameter but only about 4 threads will fit into the barrel. Under a microscope I count 30 threads per inch on the type fork I need to replace. The used one I found has 32 threads per inch as does the forks available from Aircraft Spruce. Is it possible the used turnbuckles I got years ago at Oshkosh are a military spec which is different than the thread spec currently used on civilian aircraft? I will be able to replace the entire turnbuckle unit but I am curious about the 2 threads per inch difference in the forks. Anybody have any explanation?> > Ralph in SD________________________________________________________________________________Subject: Pietenpol-List: motorcycle master cylinder

Original Posted By: "AircamperN11MS"
Dan,Technically speaking, post weld normalizing is not necessary when welding 4130for thicknesses of 1/8" or less. However, the need to follow appropriate weldingprocedures, using the correct filler rods (in the appropriate sizes) etc isvery important. And, as it has already been mentioned, slow cooling in verystill air, at room temperature is critical.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: motorcycle master cylinder

Original Posted By: "tkreiner"
Jon,Mt motorcycles have the same master cylinder. I have often wondered the same thing.I don't have brakes on my plane, that said you would really need to becareful about which brake calipers you use. The master cyl does not have muchvolume transfer when you apply the brakes. You could easily end up with a caliperthat would require more fluid to operate that the master cylinder couldsupply with a single stroke. Perhaps you could use the caliper from the motorcycleas well. Then I wouldn't see any potential problems. In fact I suspectit would work very well.Just something to consider,--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: motorcycle master cylinder

Original Posted By: Jim Boyer
Scott,If you'll examine a fully bled disc brake setup, I think you'll find that the clearancebetween pad and disc is around .005 in. So, in order to operate properly,the brake master only needs a few thousandths of movement itself. In fact, if the ratio of piston areas is 8 to one, and we assume .005 piston travelat the caliper, the master cylinder piston only needs to move .040 in.The amount of fluid being moved is very small; in a kart or cycle brake setup suchas the one shown the volume of fluid beng move is probable around .5 cc orless. Hope this helps...--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Fri, 8 Apr 2016 18:41:57 +0000 (UTC)

Original Posted By: Ray Krause
You guys a spot on. I only mention the whole ratio thing so that all volumes areconsidered. That master cyl is very small, I know because I have a few. Ijust didn't want someone thinking that they might be able to operate a dual pistoncaliper with it. You need to do the math first. If done properly, I don't see any reason it wouldn't work.Yes I understand how it all works. I have well over 40 years either working onor designing tractors and fire equipment.Thanks for the input. I was just trying to answer his direct questions. Cheers all,Jim, I have never seen Dick's plane in person and did not know what brakes he had used.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: "wheelharp"
John,I would like to get the most recent BPA newsletter. I guess my subscription ranout. Please send the info. I will send a check right away. No need to mail itto me, email is gone.Thanks,Ray Krause843 Jay StreetColusa, CA 95932Sent from my iPad> On Feb 29, 2016, at 5:12 PM, John Hofmann wrote:> > The promised w&b articles.> > Best,> -john-> > >> On Feb 26, 2016, at 7:52 AM, John Hofmann wrote:>> >> >> I will post it to the list later today when I get to my hotel.>> >> Sent from my iPhone>> >>> On Feb 26, 2016, at 5:17 AM, johnnysdrop wrote:>>> >>> >>> Is the Brodhead / WW W&B calculator available online?>>> English Johnny>>> STILL building wings>>> >>> -------->>> The only way is UP>>> >>> >>> >>> >>> Read this topic online here:>>> >>> http://forums.matronics.com/viewtopic.p ... 205#453205> ________________________________________________________________________________Subject: Pietenpol-List: Re: motorcycle master cylinder

Original Posted By: "AircamperN11MS"
Thanks Ryan...I can't believe you found this! I never thought I'd find out whatthis book was. Now I can narrow down my search and possibly find exactly whichprinting I have. Thanks again!--------Jon JonesIronton, MORead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: motorcycle master cylinder

Original Posted By: "charles mcfarland"
Jon,I hope you have positive results. I am very curious how well they work. SomethingI have thought about every time I work on my KTM.Cheers,--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: motorcycle master cylinder