---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Mon 02/24/03: 24 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:45 AM - will an A-65 stop spinning? (Edwin Johnson) 2. 07:51 AM - Re: Pietenpol-List Digest: 12 Msgs - 02/23/03 (Isablcorky@aol.com) 3. 08:40 AM - just try not to touch that throttle----a test (Michael D Cuy) 4. 09:46 AM - Web Site (Ken Rickards) 5. 10:00 AM - Ken's Nose/Cowl Idea on his web page (Michael D Cuy) 6. 10:15 AM - Re: Ken's Nose/Cowl Idea on his web page (Ken Rickards) 7. 10:19 AM - GN-1 vs. aircamper (travis battreal) 8. 10:26 AM - Cooling Eyebrows (Dick and Marge Gillespie) 9. 10:31 AM - Re: Cooling Eyebrows (Isablcorky@aol.com) 10. 10:49 AM - Re: GN-1 vs. aircamper (Ken Rickards) 11. 11:03 AM - Re: Web Site (DJ Vegh) 12. 11:04 AM - Re: GN-1 vs. aircamper (DJ Vegh) 13. 11:20 AM - Re: Web Site (Ken Rickards) 14. 12:06 PM - Re: another windshield Q (rambog@erols.com) 15. 12:10 PM - Re: just try not to touch that throttle----a test (del magsam) 16. 12:20 PM - Re: another windshield Q (walter evans) 17. 01:41 PM - Re: Cooling Eyebrows (Hubbard, Eugene) 18. 02:18 PM - Re: Cooling Eyebrows (walter evans) 19. 03:09 PM - Re: just try not to touch that throttle----short patterns (Michael Conkling) 20. 03:41 PM - corvair piet (Mark) 21. 05:52 PM - Re: Cooling Eyebrows (Jack Phillips) 22. 06:40 PM - Alternate Woods (ANNCARLEK@aol.com) 23. 06:44 PM - Re: another windshield Q (Waytogopiet@aol.com) 24. 06:56 PM - GN-1 Plans (Paul Schermerhorn) ________________________________ Message 1 _____________________________________ Time: 07:45:17 AM PST US From: Edwin Johnson Subject: Pietenpol-List: will an A-65 stop spinning? --> Pietenpol-List message posted by: Edwin Johnson Hello Walt, Your answer, as you have already read, depends upon at least two factors: 1) condition of the compression in your particular engine and 2) an airspeed fast enough to spin the prop. The smaller engines, such as an A-65, will almost always begin windmilling if you lower the nose and then restart if all is right in the engine. But this depends on the compression condition in that engine. I had a Luscombe with an A-65 in it and had in the course of ownership both wooden and metal props. The engine always had better than average compression. I stopped the engine with both props and generally couldn't get it to stop windmilling unless near a stall. The airport used to have a C-150 in which I gave instruction and I tried it with the Cessna with the same results. However, that plane had an overhaul and when returned the engine was rather tight with good compression. We tried it then and the prop stopped. Lowering the nose a little started the prop windmilling with no problem. Generally you don't have to 'dive' the plane that fast to achieve windmilling. Now the Piet has such a sink rate that altitude would matter if you inadvertantly slowed the plane down and the prop stopped and you needed the altitude to lower the nose. :) Keeping the plane gliding you would probably never stop the prop with either metal or wooden prop. Practice your engine out landings to determine speeds you need for round-out and flair. _After_ you feel comfortable with that, then go up and try it, over a decent size airport. ...Edwin > --> Pietenpol-List message posted by: "walter evans" > > > Here's the question,,,An A-65 with a wood prop, let's say pulled back to idle, > and you shut off the mags. Would the engine keep spinning? Would it make a > difference if you were at cruise or flying slow? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~ Edwin Johnson ....... elj@shreve.net ~ ~ http://www.shreve.net/~elj ~ ~ ~ ~ "Once you have flown, you will walk the ~ ~ earth with your eyes turned skyward, ~ ~ for there you have been, there you long ~ ~ to return." -- da Vinci ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ________________________________ Message 2 _____________________________________ Time: 07:51:21 AM PST US From: Isablcorky@aol.com Subject: Pietenpol-List: Re: Pietenpol-List Digest: 12 Msgs - 02/23/03 --> Pietenpol-List message posted by: Isablcorky@aol.com Discussion on spinning props brought back some fond memories ( when you get old you will realize that most all you have left is memories). Anyway we were to go through our dead stick stage at a WWII aux field near New Braunfels, Tex. BIG, LONG runways. We were flying L-16s with 85 and 90 HP fuel inj Continentals. Procedure was to fly downwind directly over the runway, cut ignition and silently float down to a beautiful 3 pt with nothing moving other than a rapid pulse after a 180 overhead pattern. When we tried it, instructor aboard, we couldn't get the prop stopped, metal. Finally, the only way I was able to stop the prop was through excessive pumping the primer. THEN when some poor mechanic tried to restart the engine it took several proppers as it did not want to restart. The thing I do remember from that is the longer glide with no spinning prop drag and the errie silence experienced. Pardon me Piet but I just had to recall this little memory Corky in La waiting for Walt's sleet, snow and freezing rain to come tonight from Dallas Then I'll send it on to New Joisey. DO NOT ARCHIVE ________________________________ Message 3 _____________________________________ Time: 08:40:31 AM PST US From: Michael D Cuy Subject: Pietenpol-List: just try not to touch that throttle----a test --> Pietenpol-List message posted by: Michael D Cuy Walt/ Group, While dreaming about lush green sod runways and gorgeous burnt orange and yellow sunsets at 500 feet agl at 45 mph in the Pietenpol, (can you tell we are still burried in snow ?) I wanted to tell you guys about a little game I play with myself and the Piet when in the pattern shooting landings. I choose an altitude and spot to bring the throttle back on downwind then try not to touch the throttle till after touchdown. Not as easy as I thought it would be in the Piet. These things are draggy. I mean draggy. You need to hold the nose down further than any other plane you have flown before to keep your speed sufficient with the engine at idle. Compound that with a wind down the runway (which is the way most of us try to land) and this becomes a game of "would I have clipped the wires or made the runway ?". I'm amazed at how many times I would have not made the runway if that burst of power were not available. To make the Piet fly more like our old Champ or a Cub I generally don't throttle all the way back opposite the threshold like most taildragger instructors used to and still teach. I leave a bit in there to flatten out the entire base and final leg. This really helps to give you time to make your turns, look for traffic, and setup for landing. The wild thing about the Piet is that while you can fly a pattern much, much, tighter into the runway, you'll see the Cherokees and Cessnas doing long, drawn out approaches that even the jets at LaGuardia would laugh at. I always thought that if you lost your engine in the pattern you were still supposed to be able to make the runway. I don't know about you guys but the only ones who fly like that are the guys with Piets, Cubs, Champs, etc. I realize that sometimes we need spacing and that the pattern gets stretched out, but at least in the Cleveland area people fly like they are in 737's. I know Bonanzas and hotter factory builts or Lancairs need some time to setup, but fitting into these patterns with a Piet you are always running cruise power till on short final. Sorry for the editorial........I digress. Mike C. ________________________________ Message 4 _____________________________________ Time: 09:46:22 AM PST US From: Ken Rickards Subject: Pietenpol-List: Web Site --> Pietenpol-List message posted by: Ken Rickards After seeing DJ's web site a couple of months ago, I decided to try my hand at creating my own site for documenting my progress. I found the various sites and pictures very useful, everyone has their own way of doing things and I picked up some good ideas. Although not as complex as DJ's (i'm limited to space on my server), I tried to pack in as much as possible. I apologies for the name of the site, Pietbuilder, but believe it or not, Aircamper, Gn1, etc were all taken, So I had to use Pietbuilder, even though it's a GN1. I will add more pages as I progress with the project. http://home.cogeco.ca/~pietbuilder/index.htm Ken Ken Rickards Cole Vision Canada 80 Centurion Drive, Markham, Ontario. L3R 8C1 tel 905-940-8675 ext 237 krickards@CVCI.com ________________________________ Message 5 _____________________________________ Time: 10:00:11 AM PST US From: Michael D Cuy Subject: Pietenpol-List: Ken's Nose/Cowl Idea on his web page --> Pietenpol-List message posted by: Michael D Cuy >Ken Rickard's shows something I have never seen done to a Piet with some >nice flowing lines created by utilizing a large spinner that would blend into the cowling behind it. Looks like a Corvair for power maybe. wow, what a pretty looking GN-1 !!!!! Mike C. do not archive >http://home.cogeco.ca/~pietbuilder/index.htm ________________________________ Message 6 _____________________________________ Time: 10:15:29 AM PST US From: Ken Rickards Subject: RE: Pietenpol-List: Ken's Nose/Cowl Idea on his web page --> Pietenpol-List message posted by: Ken Rickards Thanks for the feedback Mike, and yes it's gonna be Corvair powered. I got the Idea for the large spinner from the Hawker Fury, one of the best looking Bi-Plane fighters of all time!!! Ken do not archive -----Original Message----- From: Michael D Cuy [mailto:Michael.D.Cuy@grc.nasa.gov] Subject: Pietenpol-List: Ken's Nose/Cowl Idea on his web page --> Pietenpol-List message posted by: Michael D Cuy >Ken Rickard's shows something I have never seen done to a Piet with some >nice flowing lines created by utilizing a large spinner that would blend into the cowling behind it. Looks like a Corvair for power maybe. wow, what a pretty looking GN-1 !!!!! Mike C. do not archive >http://home.cogeco.ca/~pietbuilder/index.htm ________________________________ Message 7 _____________________________________ Time: 10:19:35 AM PST US From: travis battreal Subject: Pietenpol-List: GN-1 vs. aircamper --> Pietenpol-List message posted by: travis battreal What are the differences between the GN-1 and the aircamper? I noticed the photos of a GN-1 posted a couple of days ago showed ply webbing under the fuselage, similar to the mini-max design. I assume the GN-1 is not a steel tube variant. --- Ken Rickards wrote: > --> Pietenpol-List message posted by: Ken Rickards > > > After seeing DJ's web site a couple of months ago, I > decided to try my hand > at creating my own site for documenting my progress. > I found the various > sites and pictures very useful, everyone has their > own way of doing things > and I picked up some good ideas. Although not as > complex as DJ's (i'm > limited to space on my server), I tried to pack in > as much as possible. I > apologies for the name of the site, Pietbuilder, but > believe it or not, > Aircamper, Gn1, etc were all taken, So I had to use > Pietbuilder, even > though it's a GN1. I will add more pages as I > progress with the project. > > http://home.cogeco.ca/~pietbuilder/index.htm > > > Ken > > > Ken Rickards > Cole Vision Canada > 80 Centurion Drive, > Markham, Ontario. > L3R 8C1 > > tel 905-940-8675 ext 237 > krickards@CVCI.com > > > > Contributions > any other > Forums. > > latest messages. > List members. > > http://www.matronics.com/subscription > http://www.matronics.com/FAQ/Pietenpol-List.htm > Digests:http://www.matronics.com/digest/pietenpol-list > http://www.matronics.com/archives > http://www.matronics.com/photoshare > http://www.matronics.com/emaillists > > > > > http://taxes.yahoo.com/ ________________________________ Message 8 _____________________________________ Time: 10:26:20 AM PST US From: "Dick and Marge Gillespie" Subject: Pietenpol-List: Cooling Eyebrows --> Pietenpol-List message posted by: "Dick and Marge Gillespie" What is the thinnest 4130 that brackets can be made of that fasten to the cylinder attach studs, and are they placed between the nuts and the palnuts? DickG. in Ft. Myers ________________________________ Message 9 _____________________________________ Time: 10:31:47 AM PST US From: Isablcorky@aol.com Subject: Re: Pietenpol-List: Cooling Eyebrows --> Pietenpol-List message posted by: Isablcorky@aol.com I would think about .025 to .032 would be plenty strong as you have a flange for added strength. Mind is bolted between the case and the hold down bolt. I have no pal nuts. Corky ________________________________ Message 10 ____________________________________ Time: 10:49:05 AM PST US From: Ken Rickards Subject: RE: Pietenpol-List: GN-1 vs. aircamper --> Pietenpol-List message posted by: Ken Rickards Both the GN1 and the Pietenpol have steel fuse versions. Although both Aircraft look similar there are some differences. The wing construction in the GN1 is different, some may say overbuilt, the wing on the Pietenpol is moveable, fuse construction is also different with the GN1, plans calling for the plywood sides to extend beyond the rear cockpit to the tail post. DJ Vegh has eliminated this on his GN1 to save weight and I will be doing the same thing. The GN1 fuse is longer than the original Pietenpol, but the Pietenpol also comes in a long fuse version. The GN1 also allows for the use of Cub parts, fuel tank, main gear etc. No matter which way you go you will end up will a classic homebuilt. Ken -----Original Message----- From: travis battreal [mailto:travisbattreal@yahoo.com] Subject: Pietenpol-List: GN-1 vs. aircamper --> Pietenpol-List message posted by: travis battreal What are the differences between the GN-1 and the aircamper? I noticed the photos of a GN-1 posted a couple of days ago showed ply webbing under the fuselage, similar to the mini-max design. I assume the GN-1 is not a steel tube variant. --- Ken Rickards wrote: > --> Pietenpol-List message posted by: Ken Rickards > > > After seeing DJ's web site a couple of months ago, I > decided to try my hand > at creating my own site for documenting my progress. > I found the various > sites and pictures very useful, everyone has their > own way of doing things > and I picked up some good ideas. Although not as > complex as DJ's (i'm > limited to space on my server), I tried to pack in > as much as possible. I > apologies for the name of the site, Pietbuilder, but > believe it or not, > Aircamper, Gn1, etc were all taken, So I had to use > Pietbuilder, even > though it's a GN1. I will add more pages as I > progress with the project. > > http://home.cogeco.ca/~pietbuilder/index.htm > > > Ken > > > Ken Rickards > Cole Vision Canada > 80 Centurion Drive, > Markham, Ontario. > L3R 8C1 > > tel 905-940-8675 ext 237 > krickards@CVCI.com > > > > Contributions > any other > Forums. > > latest messages. > List members. > > http://www.matronics.com/subscription > http://www.matronics.com/FAQ/Pietenpol-List.htm > Digests:http://www.matronics.com/digest/pietenpol-list > http://www.matronics.com/archives > http://www.matronics.com/photoshare > http://www.matronics.com/emaillists > > > > > http://taxes.yahoo.com/ ________________________________ Message 11 ____________________________________ Time: 11:03:09 AM PST US From: "DJ Vegh" Subject: Re: Pietenpol-List: Web Site --> Pietenpol-List message posted by: "DJ Vegh" lookin good! I especially like the method of clamping the rib gussets with plexiglass... I must admit.. after building a rib and nailing about 150 nails with tweezers and a small hammer, my fingers and eyes hurt. DJ ----- Original Message ----- From: Ken Rickards To: 'pietenpol-list@matronics.com' Sent: Monday, February 24, 2003 10:57 AM Subject: Pietenpol-List: Web Site --> Pietenpol-List message posted by: Ken Rickards After seeing DJ's web site a couple of months ago, I decided to try my hand at creating my own site for documenting my progress. I found the various sites and pictures very useful, everyone has their own way of doing things and I picked up some good ideas. Although not as complex as DJ's (i'm limited to space on my server), I tried to pack in as much as possible. I apologies for the name of the site, Pietbuilder, but believe it or not, Aircamper, Gn1, etc were all taken, So I had to use Pietbuilder, even though it's a GN1. I will add more pages as I progress with the project. http://home.cogeco.ca/~pietbuilder/index.htm Ken Ken Rickards Cole Vision Canada 80 Centurion Drive, Markham, Ontario. L3R 8C1 tel 905-940-8675 ext 237 krickards@CVCI.com = This email has been scanned for known viruses and made safe for viewing by Half Price Hosting, a leading email and web hosting provider. For more information on an anti-virus email solution, visit . ________________________________ Message 12 ____________________________________ Time: 11:04:42 AM PST US From: "DJ Vegh" Subject: Re: Pietenpol-List: GN-1 vs. aircamper --> Pietenpol-List message posted by: "DJ Vegh" a question that has been asked hundreds of times.... basically the GN-1 is a clone of the Piet with the exception of being a tad over built... plywood sides all the way to tail post, larger wing spars, etc. GN-1 was also designed to accept a host of off the shelf parts... things like J-3 landing gear, J-3 tank, J-3 engine mount (if using A-65 or C-85), Aeronca control stick assembly, T-Craft aux wing tanks, J-3 drag-anti drag wing wires, and lots more I am not remembering now. I am building a GN-1/Piet hybrid.... taking the best of both planes. John Grega dies last November, but I suppose his family will continue to sell the plane... if not someone ought to contact them and buy the rights cause we need the keep the spirit of the GN-1 alive. DJ Vegh www.imagedv.com/aircamper ----- Original Message ----- From: travis battreal To: pietenpol-list@matronics.com Sent: Monday, February 24, 2003 11:19 AM Subject: Pietenpol-List: GN-1 vs. aircamper --> Pietenpol-List message posted by: travis battreal What are the differences between the GN-1 and the aircamper? I noticed the photos of a GN-1 posted a couple of days ago showed ply webbing under the fuselage, similar to the mini-max design. I assume the GN-1 is not a steel tube variant. --- Ken Rickards wrote: > --> Pietenpol-List message posted by: Ken Rickards > > > After seeing DJ's web site a couple of months ago, I > decided to try my hand > at creating my own site for documenting my progress. > I found the various > sites and pictures very useful, everyone has their > own way of doing things > and I picked up some good ideas. Although not as > complex as DJ's (i'm > limited to space on my server), I tried to pack in > as much as possible. I > apologies for the name of the site, Pietbuilder, but > believe it or not, > Aircamper, Gn1, etc were all taken, So I had to use > Pietbuilder, even > though it's a GN1. I will add more pages as I > progress with the project. > > http://home.cogeco.ca/~pietbuilder/index.htm > > > Ken > > > Ken Rickards > Cole Vision Canada > 80 Centurion Drive, > Markham, Ontario. > L3R 8C1 > > tel 905-940-8675 ext 237 > krickards@CVCI.com > > > > Contributions > any other > Forums. > > latest messages. > List members. > > http://www.matronics.com/subscription > http://www.matronics.com/FAQ/Pietenpol-List.htm > Digests:http://www.matronics.com/digest/pietenpol-list > http://www.matronics.com/archives > http://www.matronics.com/photoshare > http://www.matronics.com/emaillists > > > > > http://taxes.yahoo.com/ = This email has been scanned for known viruses and made safe for viewing by Half Price Hosting, a leading email and web hosting provider. For more information on an anti-virus email solution, visit . ________________________________ Message 13 ____________________________________ Time: 11:20:56 AM PST US From: Ken Rickards Subject: RE: Pietenpol-List: Web Site --> Pietenpol-List message posted by: Ken Rickards Wish I could say that it was my idea, but my brother built his Hatz ribs this way and it looked the easiest method to use. Ken -----Original Message----- From: DJ Vegh [mailto:aircamper@imagedv.com] Subject: Re: Pietenpol-List: Web Site --> Pietenpol-List message posted by: "DJ Vegh" lookin good! I especially like the method of clamping the rib gussets with plexiglass... I must admit.. after building a rib and nailing about 150 nails with tweezers and a small hammer, my fingers and eyes hurt. DJ ----- Original Message ----- From: Ken Rickards To: 'pietenpol-list@matronics.com' Sent: Monday, February 24, 2003 10:57 AM Subject: Pietenpol-List: Web Site --> Pietenpol-List message posted by: Ken Rickards After seeing DJ's web site a couple of months ago, I decided to try my hand at creating my own site for documenting my progress. I found the various sites and pictures very useful, everyone has their own way of doing things and I picked up some good ideas. Although not as complex as DJ's (i'm limited to space on my server), I tried to pack in as much as possible. I apologies for the name of the site, Pietbuilder, but believe it or not, Aircamper, Gn1, etc were all taken, So I had to use Pietbuilder, even though it's a GN1. I will add more pages as I progress with the project. http://home.cogeco.ca/~pietbuilder/index.htm Ken Ken Rickards Cole Vision Canada 80 Centurion Drive, Markham, Ontario. L3R 8C1 tel 905-940-8675 ext 237 krickards@CVCI.com = This email has been scanned for known viruses and made safe for viewing by Half Price Hosting, a leading email and web hosting provider. For more information on an anti-virus email solution, visit . ________________________________ Message 14 ____________________________________ Time: 12:06:25 PM PST US From: "rambog@erols.com" Subject: RE: Pietenpol-List: another windshield Q --> Pietenpol-List message posted by: "rambog@erols.com" Same thing here, I built a new front windshield for my Travel Air out of Lexan. Was pretty proud until the first time I fueled it and spilled a little 100LL on it, shattered into pieces before my eyes. I have also HEARD, so it may not be true, that heating Lexan to form it cooks some type of solvents out of it, making it brittle. Anyone else heard this? Gene do not archive Original Message: ----------------- From: Jack Phillips jackphillips@earthlink.net Subject: RE: Pietenpol-List: another windshield Q --> Pietenpol-List message posted by: "Jack Phillips" Hi Dick, Years ago I did some heat forming of Lexan. It doesn't take much temperature - maybe 200 deg. in your wife's oven. It will be very pliable after a few minutes in the oven and can be draped over a form to cool. To get really slick, make your form of aluminum with tiny holes drilled on 1" squares and a plenum chamber on the back side connected to a vacuum (like a shop vac). Put the softened lexan in place, turn on the vacuum and it will quickly take the shape of the form. Be careful with Lexan. Lexan is a polycarbonate and is highly susceptible to a phenomenon known as "stress-cracking". What happens is that while polycarbonate is very strong, in the presence of some solvents it loses strength very rapidly, to the point that any locked in stresses (such as the stresses applied by the bolts holding the windshiedl in place) can cause cracks to develop. Unfortunately, one of the solvents that causes this is gasoline. If you have any stresses in the windshield and spill a little gas on it, it will likely begin to crack around the screw holes. I once saw a Lexan windshield on a Starduster Too get some 100 octane splashed on it and the whole thing just crazed and shattered right before my eyes. I was working the line at the airport and certainly was glad that the owner had fueled the plane, instead of me being responsible. Acrylic (plexiglas) is not as strong as polycarbonate, but is not so susceptible to stress cracking. Jack -----Original Message----- From: owner-pietenpol-list-server@matronics.com [mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Richard Navratril Subject: Pietenpol-List: another windshield Q --> Pietenpol-List message posted by: "Richard Navratril" I have already cut my lexan from a template. Now I would like to heat form it. Does anyone have ideas of heating required and methods for bending? I dont have much scrap left to play with. Dick N. ________________________________ Message 15 ____________________________________ Time: 12:10:56 PM PST US From: del magsam Subject: Re: Pietenpol-List: just try not to touch that throttle----a test --> Pietenpol-List message posted by: del magsam The wild thing about the Piet is that > while you can fly a > pattern much, much, tighter into the runway, you'll > see the Cherokees and > Cessnas doing long, drawn out approaches that even > the jets at LaGuardia > would laugh at. I always thought that if you lost > your engine in the > pattern you were still supposed to be able to make > the runway. MIke my instructor gets after me when I don't fly out a big pattern, because he doesn't want to cut the power so much, especially in the winter time, when descending. but when I'm flying myself, I like the old school of thought of shortening up the pattern. I liked landing with the old tcraft, just pull the throttle and push the yolk to panel (nearly) Del ===== Del-New Richmond, Wi "farmerdel@rocketmail.com" http://taxes.yahoo.com/ ________________________________ Message 16 ____________________________________ Time: 12:20:16 PM PST US From: "walter evans" Subject: Re: Pietenpol-List: another windshield Q --> Pietenpol-List message posted by: "walter evans" I've heard something like that. For me the only thing I didn't like about Plexiglass was that I couldn't bend it. Now that I've found out how easy it is, there is no reason to use anything else. Plexiglass is: fraction of the cost gas doesn't bother it heat bends nice, and been done like that for years Lexan: expensive to bend it a mystery doesn't like gas cant clean it with normal stuff (windex will destroy it). for me Plexiglass is a win, win, win , situation walt ps going to try complex bends with Plexi soon ( dombs) ----- Original Message ----- From: Subject: RE: Pietenpol-List: another windshield Q > --> Pietenpol-List message posted by: "rambog@erols.com" > > Same thing here, I built a new front windshield for my Travel Air out of > Lexan. Was pretty proud until the first time I fueled it and spilled a > little 100LL on it, shattered into pieces before my eyes. I have also > HEARD, so it may not be true, that heating Lexan to form it cooks some type > of solvents out of it, making it brittle. Anyone else heard this? > > Gene > do not archive > > Original Message: > ----------------- > From: Jack Phillips jackphillips@earthlink.net > Date: Fri, 21 Feb 2003 21:48:34 -0500 > To: pietenpol-list@matronics.com > Subject: RE: Pietenpol-List: another windshield Q > > > --> Pietenpol-List message posted by: "Jack Phillips" > > > Hi Dick, > > Years ago I did some heat forming of Lexan. It doesn't take much > temperature - maybe 200 deg. in your wife's oven. It will be very pliable > after a few minutes in the oven and can be draped over a form to cool. To > get really slick, make your form of aluminum with tiny holes drilled on 1" > squares and a plenum chamber on the back side connected to a vacuum (like a > shop vac). Put the softened lexan in place, turn on the vacuum and it will > quickly take the shape of the form. > > Be careful with Lexan. Lexan is a polycarbonate and is highly susceptible > to a phenomenon known as "stress-cracking". What happens is that while > polycarbonate is very strong, in the presence of some solvents it loses > strength very rapidly, to the point that any locked in stresses (such as the > stresses applied by the bolts holding the windshiedl in place) can cause > cracks to develop. Unfortunately, one of the solvents that causes this is > gasoline. If you have any stresses in the windshield and spill a little gas > on it, it will likely begin to crack around the screw holes. I once saw a > Lexan windshield on a Starduster Too get some 100 octane splashed on it and > the whole thing just crazed and shattered right before my eyes. I was > working the line at the airport and certainly was glad that the owner had > fueled the plane, instead of me being responsible. Acrylic (plexiglas) is > not as strong as polycarbonate, but is not so susceptible to stress > cracking. > > Jack > > -----Original Message----- > From: owner-pietenpol-list-server@matronics.com > [mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Richard > Navratril > To: pietenpol-list@matronics.com > Subject: Pietenpol-List: another windshield Q > > --> Pietenpol-List message posted by: "Richard Navratril" > > > I have already cut my lexan from a template. Now I would like to heat form > it. Does anyone have ideas of heating required and methods for bending? I > dont have much scrap left to play with. > Dick N. > > ________________________________ Message 17 ____________________________________ Time: 01:41:01 PM PST US From: "Hubbard, Eugene" Subject: RE: Pietenpol-List: Cooling Eyebrows --> Pietenpol-List message posted by: "Hubbard, Eugene" Dick, I made an angle of .032 4130 about 3/4" on a side that spanned the fore and aft cylinder. I put this between the nuts and palnuts with the flange facing the centerline of the engine (easy way to put it on). I then mounted five rivnuts to screw the eyebrow itself onto. This helps support the eyebrow itself. It hasn't flown yet, but it looks official. Gene -----Original Message----- From: Dick and Marge Gillespie [mailto:dickmarg@peganet.com] Subject: Pietenpol-List: Cooling Eyebrows --> Pietenpol-List message posted by: "Dick and Marge Gillespie" What is the thinnest 4130 that brackets can be made of that fasten to the cylinder attach studs, and are they placed between the nuts and the palnuts? DickG. in Ft. Myers ________________________________ Message 18 ____________________________________ Time: 02:18:31 PM PST US From: "walter evans" Subject: Re: Pietenpol-List: Cooling Eyebrows --> Pietenpol-List message posted by: "walter evans" Does everyone roll welding rod wire in the exposed edges of the eyebrows? Guess everyone does, but I thought I'd bring it up again, since the thread started again. also used it in all the openings of the engine cowl. Makes for a really nice job. walt evans NX140DL ----- Original Message ----- From: "Dick and Marge Gillespie" Subject: Pietenpol-List: Cooling Eyebrows > --> Pietenpol-List message posted by: "Dick and Marge Gillespie" > > What is the thinnest 4130 that brackets can be made of that fasten to the cylinder attach studs, and are they placed between the nuts and the palnuts? > > DickG. in Ft. Myers > > ________________________________ Message 19 ____________________________________ Time: 03:09:07 PM PST US From: "Michael Conkling" Subject: Re: Pietenpol-List: just try not to touch that throttle----short patterns --> Pietenpol-List message posted by: "Michael Conkling" You're reminding me of one of the drills my instructor had us do in the Cub (mid 60's flight training) -- Arlo had me pull the throttle across from the landing point & put the Cub into a L.H. forward slip -- the turn to base was accomplished by easing out the right rudder (the bank was already there) -- on base you applied the R.H. rudder -- same thing again for the turn to final. The pattern was real close -- about 1/2 to 1/3 normal -- a lot of fun slipping the Cub with the windows & door open. I also liked the pattern we used at the glider port -- at the "point" we started a shallow constant banked approach -- no base leg as per say -- just did a big descending 180 degree turn -- easy to adjust your turn rate as you came down. You guys are "clearing your engine" on base, aren't you??;-) Mike C. (are we getting too many "mikes" in this group??) Pretty Prairie, KS ----- Original Message ----- From: "del magsam" Subject: Re: Pietenpol-List: just try not to touch that throttle----a test > --> Pietenpol-List message posted by: del magsam > > The wild thing about the Piet is that > > while you can fly a > > pattern much, much, tighter into the runway, you'll > > see the Cherokees and > > Cessnas doing long, drawn out approaches that even > > the jets at LaGuardia > > would laugh at. I always thought that if you lost > > your engine in the > > pattern you were still supposed to be able to make > > the runway. > > MIke > my instructor gets after me when I don't fly out a big > pattern, because he doesn't want to cut the power so > much, especially in the winter time, when descending. > but when I'm flying myself, I like the old school of > thought of shortening up the pattern. I liked landing > with the old tcraft, just pull the throttle and push > the yolk to panel (nearly) > Del > > ===== > Del-New Richmond, Wi > "farmerdel@rocketmail.com" > > http://taxes.yahoo.com/ > > ________________________________ Message 20 ____________________________________ Time: 03:41:04 PM PST US From: "Mark" Subject: Pietenpol-List: corvair piet required 7.5, SPAM_PHRASE_00_01, USER_AGENT_OE) --> Pietenpol-List message posted by: "Mark" Does anyone on the list have a flying corvair piet?? ________________________________ Message 21 ____________________________________ Time: 05:52:06 PM PST US From: "Jack Phillips" Subject: RE: Pietenpol-List: Cooling Eyebrows --> Pietenpol-List message posted by: "Jack Phillips" I did it on the cooling eyebrows, since they were made of 3003-H14 (soft) aluminum. My cowling is .025" 2024-T3 so I didn't roll the wires in the edges of the cutouts on the cowling. By the way, the December 1999 issue of Sport Aviation (the one with the article about Mike Cuy's plane) has a very good description of how to do this and a lot of other metal working techniques in the article on building a cowling for a Curtiss Robin. Jack -----Original Message----- From: owner-pietenpol-list-server@matronics.com [mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of walter evans Subject: Re: Pietenpol-List: Cooling Eyebrows --> Pietenpol-List message posted by: "walter evans" Does everyone roll welding rod wire in the exposed edges of the eyebrows? Guess everyone does, but I thought I'd bring it up again, since the thread started again. also used it in all the openings of the engine cowl. Makes for a really nice job. walt evans NX140DL ________________________________ Message 22 ____________________________________ Time: 06:40:04 PM PST US From: ANNCARLEK@aol.com Subject: Pietenpol-List: Alternate Woods --> Pietenpol-List message posted by: ANNCARLEK@aol.com I just cut all the little struts and braces for the wing ribs, enough for 30 ribs. These were all out of very nice straight-grained Douglas Fir. Sure are a lot of pieces! The weight of them all, less capstrips, is 4.5 lbs. This means to me that one should not spend a lot of effort trying to reduce this weight by selecting a less desirable wood, such as red cedar from Home Depot, and instead, work on those areas with more promise. Carl@Compton ________________________________ Message 23 ____________________________________ Time: 06:44:31 PM PST US From: Waytogopiet@aol.com Subject: Re: Pietenpol-List: another windshield Q --> Pietenpol-List message posted by: Waytogopiet@aol.com In a message dated 2/24/2003 2:09:18 PM Central Standard Time, rambog@erols.com writes: > I have also > HEARD, so it may not be true, that heating Lexan to form it cooks some type > of solvents out of it, making it brittle. Anyone else heard this? > Gene.. I had some experience with plastics molding of bottles and we recycled waste material. The reheating process cooks out the plastcizer that is needed to avoid brittleness. Don Hicks ________________________________ Message 24 ____________________________________ Time: 06:56:33 PM PST US From: Paul Schermerhorn Subject: Pietenpol-List: GN-1 Plans --> Pietenpol-List message posted by: Paul Schermerhorn I ordered GN-1 plans 12.02.02. Check has been cashed, but no plans yet. I did not know of John's passing at the time. Still not a big deal! Cheers, Paul ---------------------------------