---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Fri 01/21/05: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:06 AM - prop size (Richard Navratil) 2. 08:30 AM - Re: prop size (DJ Vegh) 3. 11:06 AM - Ohio Weather Prediction (Isablcorky@aol.com) 4. 11:25 AM - Re: Ohio Weather Prediction (Michael D Cuy) 5. 11:29 AM - Re: Ohio Weather Prediction (Phillips, Jack) 6. 05:26 PM - Re: prop size (Les Schubert) 7. 06:49 PM - Re: prop size (Richard Navratil) 8. 08:13 PM - Saw dust is Flying (Chad Johnson) 9. 10:36 PM - Re: Ohio Weather Prediction (Rcaprd@aol.com) 10. 11:52 PM - Re: prop size (Clif Dawson) ________________________________ Message 1 _____________________________________ Time: 08:06:12 AM PST US From: "Richard Navratil" Subject: Pietenpol-List: prop size I have been reading a book on making propellers. Just for comparisons, what size prop do those flying with the Corvair engine use? Does the Corvair run at about 100 hp? What is max rpm? What is the cruise speed you get? I have a Rotec radial engine on order. According to this book, I may have ordered a much too aggresive prop. The factory recommended a 72x55. I told them I wanted a climb prop, but I'm not going to be towing banners or gliders. Thanks Dick N. ________________________________ Message 2 _____________________________________ Time: 08:30:37 AM PST US From: "DJ Vegh" Subject: Re: Pietenpol-List: prop size my Corvair has a 66x29 on it, which for a Corvair is considered a climb prop. I'm not looking for fast cruise so I propped it for great climb. The Corvair puts out anywhere from about 90-110hp depending on how you build it. Max rpm in the Corvair is limited by the size of prop you use.... but I'm going to redlinemine at about 3300. DJ ----- Original Message ----- From: Richard Navratil To: pietenpol-list@matronics.com Sent: Friday, January 21, 2005 9:03 AM Subject: Pietenpol-List: prop size I have been reading a book on making propellers. Just for comparisons, what size prop do those flying with the Corvair engine use? Does the Corvair run at about 100 hp? What is max rpm? What is the cruise speed you get? I have a Rotec radial engine on order. According to this book, I may have ordered a much too aggresive prop. The factory recommended a 72x55. I told them I wanted a climb prop, but I'm not going to be towing banners or gliders. Thanks Dick N. ________________________________ Message 3 _____________________________________ Time: 11:06:26 AM PST US From: Isablcorky@aol.com Subject: Pietenpol-List: Ohio Weather Prediction Do Not Archive Hey Mikee Cuy, I just can't believe the beautiful weekend forecast they are favoring for you. If I were fortunate to live there and fly during these beautiful nawthurn winters I believe I would jump in my Piet and fly down to Three Rivers Sunday afternoon and watch the game. How lucky can you guys get. Corky, suffering in this southern heat in Jan Do not archive ________________________________ Message 4 _____________________________________ Time: 11:25:55 AM PST US From: Michael D Cuy Subject: Re: Pietenpol-List: Ohio Weather Prediction --> Pietenpol-List message posted by: Michael D Cuy Corky-- The Pietenpol Rebel from the South !! (and all round nice guy) We are supposed to get a good dose of the white stuff again late tonight into Saturday so I guess I'm going to just have to stay inside and fiddle with my Lionel trains. As long as I have enough snacks and stuff I'll not be out doing any whifferdills in the Pietenpol. We have a special shippment coming to ya'll on Sunday direct from our neighbors in Canada to Louisianna so don't get too comfortable with your 70's because your high is only going to be about 45 F on Sunday. That is downright too cold for your thin Louisianna blood. You'd better stay inside with the bride after church. After this winter here being so tough, our blood is as thick as a Wisconsin ground hog, I tell you. Thicker, perhaps. Good thing we've grown an extra layer of fat insulation over the Christmas and New Year's holidays so we don't catch a cold. Don't wanna be anywhere close to Theresa Heinz Ketchup Field at Three Rivers on Sunday due to all the sorry Steeler fans drying tears in beers. We'll just watch it on tee-vee. If it is as exciting as last weeks game, that will be a thrill. Bundle up for Sunday, Corky and keep the bride warm ! The Yankee Boy in Ohio, Mike do not archive ________________________________ Message 5 _____________________________________ Time: 11:29:43 AM PST US Subject: RE: Pietenpol-List: Ohio Weather Prediction From: "Phillips, Jack" Corky, You're making fun of Mikeee's weather, but even as far south as Raleigh we don't have much better. Wednesday morning here was 13 degrees, and we got an inch or so of snow (which absolutely paralysed traffic). Last night we got 2" more and tomorrow we are supposed to get sleet and freezing rain, accumulating about 1/4" of ice. High on Sunday is supposed to be 29 (if you can call that a high). Good time to be in the basement working on the Pietenpol. Got my new stabilizer nearly finished and am starting in on the aileron repairs. Hope to be back in the air by May or June. Jack Phillips Raleigh, NC (which is supposed to be in the South, but doesn't feel like it) Do not archive ________________________________ Message 6 _____________________________________ Time: 05:26:06 PM PST US From: Les Schubert Subject: Re: Pietenpol-List: prop size Looking at the Rotec website I suspect that your prop will be close to correct. Also remember it is way easier to cut a little off of the blades if you have too much prop, impossible to add a little on if you don't have enough. Also the corvair typically has the prop running at crankshaft speed where as the Rotec has a 2-3 gear box. I suspect the factory has made a good recomendation. Looks like a really nice engine. Les At 10:03 AM 21/01/2005 -0600, you wrote: >I have been reading a book on making propellers. Just for comparisons, >what size prop do those flying with the Corvair engine use? Does the >Corvair run at about 100 hp? What is max rpm? What is the cruise speed >you get? >I have a Rotec radial engine on order. According to this book, I may have >ordered a much too aggresive prop. The factory recommended a 72x55. I >told them I wanted a climb prop, but I'm not going to be towing banners >or gliders. >Thanks >Dick N. ________________________________ Message 7 _____________________________________ Time: 06:49:11 PM PST US From: "Richard Navratil" Subject: Re: Pietenpol-List: prop size Thanks les &DJ I'm trying to just get an idea if the guide in the book I have is accurate. It indicates that a 72x55 will give me 107 mph at 2450 rpm prop speed. Yes, I can throttle back for cruise and use the power for climb. Dick ----- Original Message ----- From: Les Schubert To: pietenpol-list@matronics.com Sent: Friday, January 21, 2005 7:23 PM Subject: Re: Pietenpol-List: prop size Looking at the Rotec website I suspect that your prop will be close to correct. Also remember it is way easier to cut a little off of the blades if you have too much prop, impossible to add a little on if you don't have enough. Also the corvair typically has the prop running at crankshaft speed where as the Rotec has a 2-3 gear box. I suspect the factory has made a good recomendation. Looks like a really nice engine. Les At 10:03 AM 21/01/2005 -0600, you wrote: I have been reading a book on making propellers. Just for comparisons, what size prop do those flying with the Corvair engine use? Does the Corvair run at about 100 hp? What is max rpm? What is the cruise speed you get? I have a Rotec radial engine on order. According to this book, I may have ordered a much too aggresive prop. The factory recommended a 72x55. I told them I wanted a climb prop, but I'm not going to be towing banners or gliders. Thanks Dick N. ________________________________ Message 8 _____________________________________ Time: 08:13:30 PM PST US From: "Chad Johnson" Subject: Pietenpol-List: Saw dust is Flying Just a note to say that after years of dreaming and "saying" I am going to start building a piet, I actually built my table today. I know it is not an "actual" part of the airplane but I have to start some where. I am just happy to see some physical progress. I will be ready to order wood for the fin and rudder as soon as I get a quote back from the supplier. My questions for all those "experienced" builders is this. What tool or tools would you say was the most handy to have around during your building process? Any opinions on Aeropoxy glue? Any and all sugestions would be very much appreciated. Thank you. Chad Johnson, McPherson Kansas. ________________________________ Message 9 _____________________________________ Time: 10:36:45 PM PST US From: Rcaprd@aol.com Subject: Re: Pietenpol-List: Ohio Weather Prediction --> Pietenpol-List message posted by: Rcaprd@aol.com OK guys, the 'Steel Curtain' is up, and nobody, including Dillion, is allowed through!! Not in Our House !! Hey...I have a theory about why the Jets missed those two field goals: There were so many 'Terrible Towls' waving in the stadium, that it caused a series of vorticies through the goal posts, and the ball couldn't get through !! :) Steeler Fan & W Va Hillbilly Chuck do not archive ________________________________ Message 10 ____________________________________ Time: 11:52:35 PM PST US From: Clif Dawson Subject: Re: Pietenpol-List: prop size <000e01c5002c$d0c52830$0600a8c0@laptop> Which book? Here's an interesting little program to play with; http://www.nicon.org/chapter328/PropDesign/ Clif Subject: Re: Pietenpol-List: prop size Thanks les &DJ I'm trying to just get an idea if the guide in the book I have is accurate. It indicates that a 72x55 will give me 107 mph at 2450 rpm prop speed. Yes, I can throttle back for cruise and use the power for climb. Dick