Original Posted By: LanhamOS
Yes I have another question! What is thought about using poplar i/ospruce. At a wing rib building exhibit(oddly enough piet ribs) atSun-N-Fun this year the instructor was extolling the virtues of usingpoplar. Is this a one for one exchange, or do the dimensions of thewood have to be changed? I ask because I have a near unlimted supplyof clear poplar that seems to meet the same requirements that spruceselection would.Thanks for all the help! Paris W pezz720(at)yahoo.com________________________________________________________________________________
Pietenpol-List: Yet Another ??
Pietenpol-List: Re: Yet Another ??
Original Posted By: Ken Anderson
Paris,AC43.13-1a says that yellow poplar's strength is slightly less thanspruce except in compression and shear. Maximum permissable graindeviation is 1:15. It recomends not using as a direct substitute forspruce without accounting for strength properties. It's about 7% heavierthan spruce but not as heavy as douglas fir. If you don't already have acopy of AC43.13-1a get it! It's an invaluable source of construction andinspection and repair info.The ribs on the Pietenpol are overbuilt to start with. I know of manyother airplanes with significantly highter wing loading that use 1/4 X1/4 capstrips on the ribs. I don't think poplar would be a problem. Notto long ago I recal reading an article on "The Poplar Piet". I wouldcontact the owner to see if he has any suggestions.Good Luck!Paris Wilcox wrote:> Yes I have another question! What is thought about using poplar i/o> spruce. At a wing rib building exhibit(oddly enough piet ribs) at> Sun-N-Fun this year the instructor was extolling the virtues of using> poplar. Is this a one for one exchange, or do the dimensions of the> wood have to be changed? I ask because I have a near unlimted supply> of clear poplar that seems to meet the same requirements that spruce> selection would.> Thanks for all the help! Paris W pezz720(at)yahoo.com>> --David B.Schober, CPEInstructor, Aviation MaintenanceFairmont State CollegeNational Aerospace Education CenterRt. 3 Box 13Bridgeport, WV 26330-9503(304) 842-8300________________________________________________________________________________
Paris,AC43.13-1a says that yellow poplar's strength is slightly less thanspruce except in compression and shear. Maximum permissable graindeviation is 1:15. It recomends not using as a direct substitute forspruce without accounting for strength properties. It's about 7% heavierthan spruce but not as heavy as douglas fir. If you don't already have acopy of AC43.13-1a get it! It's an invaluable source of construction andinspection and repair info.The ribs on the Pietenpol are overbuilt to start with. I know of manyother airplanes with significantly highter wing loading that use 1/4 X1/4 capstrips on the ribs. I don't think poplar would be a problem. Notto long ago I recal reading an article on "The Poplar Piet". I wouldcontact the owner to see if he has any suggestions.Good Luck!Paris Wilcox wrote:> Yes I have another question! What is thought about using poplar i/o> spruce. At a wing rib building exhibit(oddly enough piet ribs) at> Sun-N-Fun this year the instructor was extolling the virtues of using> poplar. Is this a one for one exchange, or do the dimensions of the> wood have to be changed? I ask because I have a near unlimted supply> of clear poplar that seems to meet the same requirements that spruce> selection would.> Thanks for all the help! Paris W pezz720(at)yahoo.com>> --David B.Schober, CPEInstructor, Aviation MaintenanceFairmont State CollegeNational Aerospace Education CenterRt. 3 Box 13Bridgeport, WV 26330-9503(304) 842-8300________________________________________________________________________________
Pietenpol-List: Re: Yet Another ??
Original Posted By: "David B. Schober"
---"David B. Schober" wrote:>> Paris,> AC43.13-1a says that yellow poplar's strength is slightly less than> spruce except in compression and shear. Maximum permissable grain> deviation is 1:15. It recomends not using as a direct substitute for> spruce without accounting for strength properties. It's about 7%heavier> than spruce but not as heavy as douglas fir. If you don't alreadyhave a> copy of AC43.13-1a get it! It's an invaluable source of constructionand> inspection and repair info.> > The ribs on the Pietenpol are overbuilt to start with. I know of many> other airplanes with significantly highter wing loading that use 1/4 X> 1/4 capstrips on the ribs. I don't think poplar would be a problem.Not> to long ago I recal reading an article on "The Poplar Piet". I would> contact the owner to see if he has any suggestions.> > Good Luck!> > David, Forgive my ignorance, but how do I go about getting a copy ofAC43.13-1a? Any idea where you saw the article on the poplar piet? Orwho the owner might be? I appreciate the help- this could be the onlyway I can afford to get started on this dream- thanks, Paris________________________________________________________________________________
---"David B. Schober" wrote:>> Paris,> AC43.13-1a says that yellow poplar's strength is slightly less than> spruce except in compression and shear. Maximum permissable grain> deviation is 1:15. It recomends not using as a direct substitute for> spruce without accounting for strength properties. It's about 7%heavier> than spruce but not as heavy as douglas fir. If you don't alreadyhave a> copy of AC43.13-1a get it! It's an invaluable source of constructionand> inspection and repair info.> > The ribs on the Pietenpol are overbuilt to start with. I know of many> other airplanes with significantly highter wing loading that use 1/4 X> 1/4 capstrips on the ribs. I don't think poplar would be a problem.Not> to long ago I recal reading an article on "The Poplar Piet". I would> contact the owner to see if he has any suggestions.> > Good Luck!> > David, Forgive my ignorance, but how do I go about getting a copy ofAC43.13-1a? Any idea where you saw the article on the poplar piet? Orwho the owner might be? I appreciate the help- this could be the onlyway I can afford to get started on this dream- thanks, Paris________________________________________________________________________________
Pietenpol-List: Re: Yet Another ??
Original Posted By: Michael D Cuy
Paris,AC 43.13-1a Acceptable Methods, Techniques, and Practices - AircraftInspection and Repair is available from the U.S Government Printing Office,Aircraft Spruce, Jeppesen and any number of other sources. Cost is about$14.00.As to the "Popler Piet" I don't remember where I saw it. I'd suggestchecking the Buckeye Pietenpol Web Page. There may be a reference to itthere. Check Sport Aviation for about the past 6 Months. I just don'tremember.Remember, when you build, keep it light! The difference in performance willsuprise you. I've flown light "A" powered Piets that outperformed heavy C-85Piets.Later.Paris Wilcox wrote:> ---"David B. Schober" wrote:> >> > Paris,> > AC43.13-1a says that yellow poplar's strength is slightly less than> > spruce except in compression and shear. Maximum permissable grain> > deviation is 1:15. It recomends not using as a direct substitute for> > spruce without accounting for strength properties. It's about 7%> heavier> > than spruce but not as heavy as douglas fir. If you don't already> have a> > copy of AC43.13-1a get it! It's an invaluable source of construction> and> > inspection and repair info.> >> > The ribs on the Pietenpol are overbuilt to start with. I know of many> > other airplanes with significantly highter wing loading that use 1/4 X> > 1/4 capstrips on the ribs. I don't think poplar would be a problem.> Not> > to long ago I recal reading an article on "The Poplar Piet". I would> > contact the owner to see if he has any suggestions.> >> > Good Luck!> >> > David, Forgive my ignorance, but how do I go about getting a copy of> AC43.13-1a? Any idea where you saw the article on the poplar piet? Or> who the owner might be? I appreciate the help- this could be the only> way I can afford to get started on this dream- thanks, Paris>> --David B.Schober, CPEInstructor, Aviation MaintenanceFairmont State CollegeNational Aerospace Education CenterRt. 3 Box 13Bridgeport, WV 26330-9503(304) 842-8300________________________________________________________________________________
Paris,AC 43.13-1a Acceptable Methods, Techniques, and Practices - AircraftInspection and Repair is available from the U.S Government Printing Office,Aircraft Spruce, Jeppesen and any number of other sources. Cost is about$14.00.As to the "Popler Piet" I don't remember where I saw it. I'd suggestchecking the Buckeye Pietenpol Web Page. There may be a reference to itthere. Check Sport Aviation for about the past 6 Months. I just don'tremember.Remember, when you build, keep it light! The difference in performance willsuprise you. I've flown light "A" powered Piets that outperformed heavy C-85Piets.Later.Paris Wilcox wrote:> ---"David B. Schober" wrote:> >> > Paris,> > AC43.13-1a says that yellow poplar's strength is slightly less than> > spruce except in compression and shear. Maximum permissable grain> > deviation is 1:15. It recomends not using as a direct substitute for> > spruce without accounting for strength properties. It's about 7%> heavier> > than spruce but not as heavy as douglas fir. If you don't already> have a> > copy of AC43.13-1a get it! It's an invaluable source of construction> and> > inspection and repair info.> >> > The ribs on the Pietenpol are overbuilt to start with. I know of many> > other airplanes with significantly highter wing loading that use 1/4 X> > 1/4 capstrips on the ribs. I don't think poplar would be a problem.> Not> > to long ago I recal reading an article on "The Poplar Piet". I would> > contact the owner to see if he has any suggestions.> >> > Good Luck!> >> > David, Forgive my ignorance, but how do I go about getting a copy of> AC43.13-1a? Any idea where you saw the article on the poplar piet? Or> who the owner might be? I appreciate the help- this could be the only> way I can afford to get started on this dream- thanks, Paris>> --David B.Schober, CPEInstructor, Aviation MaintenanceFairmont State CollegeNational Aerospace Education CenterRt. 3 Box 13Bridgeport, WV 26330-9503(304) 842-8300________________________________________________________________________________