Brodhead Pietenpol Association

Original Posted By:
Folks=3BI have need for a larger disc sander than my little benchtop belt/disc has on it so I'm looking for a 12" disc sander. The Harbor Freight "Central Machinery" unit is readily available and the lowest cost=2C but the comparable Grizzly unit is also available for maybe $40 more. This is not for heavy-duty or production use=2C just for my shop and hobby work. I just need a sander with more torque and a bigger sanding area. Any comments about either or both of these units would be appreciated=3B thanks.Oscar ZunigaMedford=2C ORAir Camper NX41CC ________________________________________________________________________________

Original Posted By: owner-pietenpol-list-server(at)matronics.com [mailto:owner-pietenpol-lis
Oscar,I was in the same boat several years ago, I looked at both of them and chose to buy the HF bench top along with a 20% off coupon. I have been very happy with it and no complaints over the years. It is very heavy and solid and does a great job, no vibrating or walking away. Sanding discs are easy to change and I can hook up my shop-vac to it to collect the dust. For the price and comparison the HF 12 inch bench top is a good choice.BrianSLC-UTN3218H

Original Posted By: Tony Crawford
Oscar my HF has never let me down...Sent from my iPad> On Apr 27, 2016, at 10:19 AM, Oscar Zuniga wrote:> > Folks;> > I have need for a larger disc sander than my little benchtop belt/disc has on it so I'm looking for a 12" disc sander. The Harbor Freight "Central Machinery" unit is readily available and the lowest cost, but the comparable Grizzly unit is also available for maybe $40 more. This is not for heavy-duty or production use, just for my shop and hobby work. I just need a sander with more torque and a bigger sanding area. Any comments about either or both of these units would be appreciated; thanks.> > Oscar Zuniga> Medford, OR> Air Camper NX41CC> > ________________________________________________________________________________Date: Wed, 27 Apr 2016 12:10:40 -0500Subject: Re: Pietenpol-List: disc sander

Original Posted By: Glen Schweizer
Hi,Im new to the list. I just ordered plans and Im learning. Doc Mosher was greatto work with. But I have a question.Is a CAD version of the plans available so we can use our local CNC routers tocreate some of the shapes ?John________________________________________________________________________________

Original Posted By:
Hey JohnWelcome! CAD? Please keep in mind the pietenpol. 1928,cutting steel out of oildrum lids(I've heard that was mr pietenpol' source of steel). Hardware boltson the original. The point I'm trying to make is that there really are thingsthat can be made by drawing on real paper or making patterns. Hell, the originalsused nails driven into the floor for fuse jigs. Common, really?GlenSent from my iPhone> On Apr 27, 2016, at 11:21 AM, John C Black wrote:> > > > Hi,> > Im new to the list. I just ordered plans and Im learning. Doc Mosher was greatto work with. But I have a question.> > Is a CAD version of the plans available so we can use our local CNC routers tocreate some of the shapes ?> > John> > > > ________________________________________________________________________________

Original Posted By: Tony Crawford
Hi Oscar: Glad you asked. I have a Harbor Freight 6 X 48 belt sander which has the disc on the side to which you are referring. A couple years ago I decided to get an adjustable table for the belt sander like the disc has and ordered one from HF. Last summer accidently knocked it over and it fell on the floor and broke the table. Called HF, and guess what? They no longer sell the table. At Christmas, I bought one for my daughter and called again and tried to buy a table thinking it was just a model number or something kind of problem. No go. They don=99t sell repair parts. So if a another company sells repair parts, then that would be the company to go with and screw HF.Dennis

Original Posted By:> Tony Crawford
HF is good considering what they are. If you want something that's going to last longer than us, pay 4x the price. HF is throw away quality: reasonably accurate, work the beans out of it and when it breaks,trash it. Sent from my iPhone> On Apr 27, 2016, at 11:53 AM, wrote:> > Hi Oscar:> > Glad you asked. I have a Harbor Freight 6 X 48 belt sander which has the disc on the side to which you are referring. A couple years ago I decided to get an adjustable table for the belt sander like the disc has and ordered one from HF. Last summer accidently knocked it over and it fell on the floor and broke the table. Called HF, and guess what? They no longer sell the table. At Christmas, I bought one for my daughter and called again and tried to buy a table thinking it was just a model number or something kind of problem. No go. They don=99t sell repair parts.> So if a another company sells repair parts, then that would be the company to go with and screw HF.> Dennis>

Original Posted By: "tools"
When I started my Piet build I thought it would be handy to have a large disk sanderto trim and size the stick ends. (It has been one of my most useful tools.)I settled on the HF 12". The 10" I examined in the store seemed too flimsy.The 12" was heftier. I have been very happy with it. ShopVac plugs in nicelyto keep dust down. I don't remember if the stand came with it, or if I had tobuy that separately, but I recommend that too.LorenzoRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Pietenpol Plans

Original Posted By: "tools"
Generally available? Not that I know of. Someone has done it. Also more andmore common for shops to be able to scan or trace so that the customer doesn'tneed to have things digitized first. ToolsRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: disc sander

Original Posted By: "aviken"
Hf and grizzly are the same quality, generally speaking. Hf imports and sellsuninspected. Grizzly inspects and generally maintains parts.Matter of personal preference.My preference is to start beating the bushes and scare up an old delta, Rockwellor Milwaukee. Can be had for the same prices depending on condition. Ask around on owwm.org, see them often in the hunnert buck range.ToolsRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: disc sander

Original Posted By: Jim Keown
Subject: Pietenpol-List: disc sander

Original Posted By: Dan Oliver
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Original Posted By: "tkreiner"
Hey all,Does anybody know at what angle to the relative wind a Pietenpol wing willstall??Douwe________________________________________________________________________________Subject: Pietenpol-List: Re: wing stall angle

Original Posted By: Ken Bickers
Douwe,About the best information you'll find regarding the lift curve of the FC-10, orPietenpol airfoil will be anectodal.After doing an exhaustive 'net search several years ago, I gave up after viewingsome 50+ sites looking for the curve.In case folks out there don't know, Stall is defined as that point at which Clmaxoccurs. If you take a look at any airfoil lift curve, the highest point isthe point of Stall, or Cl max.Have fun looking...--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Thu, 28 Apr 2016 20:00:56 -0600Subject: Re: Pietenpol-List: Re: wing stall angle

Original Posted By: John Franklin

Original Posted By: "tools"
I knew I had seen that lift curve somewhere. Ken, thanks for digging it back up.Now, back to Douwe's original question, angle at Clmax is what he asked about(wing chord angle with respect to the relative wind), and that's what thelift curve is based on so it answers his question. However, it is not going tobe the deck angle you might see if you were to put an angle finder on the longeronand (for example), perform a power-on stall, because the relative windwill very likely not be horizontal. Also as an extreme example, you can havethe nose exactly on the horizon (airplane level) and start banking it steeperand steeper in a turn till it stalls.... with the airplane still level longitudinallybut banked.Minor technicalities ;o)--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: wing stall angle

Original Posted By: "taildrags"
Well...While ALL wings under ALL conditions stall at Vstall... That actual number in milesper hour, which relates to a certain number of degrees to relative wind,just depends.On a lot of things. Many relevant like weight, how the plane is built, and rigged,blah blah blah.I'm guessing, and it is a guess, what you really want to know is an angle to helpdecide what angle YOUR plane should sit on it's gear, which is really reallyrelevant to how you fly it.Sixteen is a good average number. And a great place to start. And in all fairness,I really don't know how much it changes with the usual variance betweennormalish piets.I do know I have to lap my stick after landing, and in a glastar taildragger whichis well known for a flat sitting angle, if I do I go flying again when I dothat. Just stuff to think about.ToolsRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: wing stall angle

Original Posted By: "tools"
Tools: good point. I need to check it again, but I think my Piet sits at betweena 12 and 13 degree angle on the ground, at rest. Piets with taller spokedwheels are probably going to be sitting a few more degrees nose-high than that.I suppose that means if I full-stall land my airplane properly, the tailwheelwill touch down first.The good thing about most of the full-stall landings that I make is that I getto try them again, because I can never keep from rebounding anywhere from a littleto a lot, especially on hard surface, so I get another shot at almost everylanding ;o) At that point I have to decide 'save or wave'... if the reboundon touchdown was just a little bounce, I can hold the stick even more firmlyback in my lap and wait for the ground to meet me in earnest, or if I bouncedenergetically back into the air on touchdown I push power back in, ease the stickforward to gain airspeed and stop the porpoising, and either fix it or goaround. Since my home field is 8800' long, I have a lot of options unless United,Horizon, or Delta is on final behind me ;o)--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: wing stall angle