Original Posted By: Michael Cuy
Just for the chuckle. When I read this in the Doug Sheets post;......I assume that Mr. Pietenpol used a French Curve to generate the airfoil.........I remembered making some part (can't remember which) that had a curve and I startedlooking for something the right size to trace around to draw the curve. After some experimenting I found that a three pound coffee can was the exact sizeI needed. I thought to myself, I'll bet that's exactly what Bernard did!Those cans haven't changed much over time. I really enjoy and admire the geniusof simplicity in his design.Bill Sayre________________________________________________________________________________
Pietenpol-List: simplicity
Pietenpol-List: Re: simplicity
Original Posted By: Bill Talbert
>Just for the chuckle.> When I read this in the Doug Sheets post;>>......I assume that Mr. Pietenpol used a French Curve to generate the >airfoil.........>>I remembered making some part (can't remember which).......I found that athree pound coffee can..... Bill S.Bill !! You sound like me !! I used medicine bottles, the ID and OD of ducttape or elect tape..etc.And by the way speaking of French curves, somewhere I read where Pietepol'sairfoil is an Eiffel 9or 7 or some such thang.Mike C. Just for the chuckle.When I readthis in the Doug Sheets post;......I assume that Mr. Pietenpol used a French Curve to generatethe airfoil.........I remembered making some part (can't remember which).......I foundthat a three pound coffee can..... Bill S.Bill !! You sound like me !! I used medicine bottles, the ID andOD of duct tape or elect tape..etc.And by the way speaking of French curves, somewhere I read wherePietepol's airfoil is an Eiffel 9or 7 or some such thang.Mike C. ________________________________________________________________________________
>Just for the chuckle.> When I read this in the Doug Sheets post;>>......I assume that Mr. Pietenpol used a French Curve to generate the >airfoil.........>>I remembered making some part (can't remember which).......I found that athree pound coffee can..... Bill S.Bill !! You sound like me !! I used medicine bottles, the ID and OD of ducttape or elect tape..etc.And by the way speaking of French curves, somewhere I read where Pietepol'sairfoil is an Eiffel 9or 7 or some such thang.Mike C. Just for the chuckle.When I readthis in the Doug Sheets post;......I assume that Mr. Pietenpol used a French Curve to generatethe airfoil.........I remembered making some part (can't remember which).......I foundthat a three pound coffee can..... Bill S.Bill !! You sound like me !! I used medicine bottles, the ID andOD of duct tape or elect tape..etc.And by the way speaking of French curves, somewhere I read wherePietepol's airfoil is an Eiffel 9or 7 or some such thang.Mike C. ________________________________________________________________________________
Pietenpol-List: Re: simplicity
Original Posted By: Joe & Marian Beck
An even easier way to draw the curves (for the airfoils at least) is todraw a grid based on the table of ordinates, drill a 1/16" hole andinsert a 1" finishing nail at each point, then use a rib stick heldagainst the inside of the nails as a guide for the pencil. Another trickI used on my rib jig is to make it out of a piece of melmane shelving-glue dont stick to it ;-)An even easier way to draw thecurves (for theairfoils at least) is to draw a grid based on the table of ordinates,drill a1/16 hole and insert a 1 finishing nail at each point, thenuse arib stick held against the inside of the nails as a guide for thepencil.Another trick I used on my rib jig is to make it out of a piece ofmelmaneshelving- glue dont stick to it ;-)________________________________________________________________________________
An even easier way to draw the curves (for the airfoils at least) is todraw a grid based on the table of ordinates, drill a 1/16" hole andinsert a 1" finishing nail at each point, then use a rib stick heldagainst the inside of the nails as a guide for the pencil. Another trickI used on my rib jig is to make it out of a piece of melmane shelving-glue dont stick to it ;-)An even easier way to draw thecurves (for theairfoils at least) is to draw a grid based on the table of ordinates,drill a1/16 hole and insert a 1 finishing nail at each point, thenuse arib stick held against the inside of the nails as a guide for thepencil.Another trick I used on my rib jig is to make it out of a piece ofmelmaneshelving- glue dont stick to it ;-)________________________________________________________________________________
Pietenpol-List: Re: simplicity
Original Posted By: "R. Mueller"
> I used medicine bottles, the ID and OD of duct tape or elect tape..etc.> And by the way speaking of French curves, somewhere I read where>Pietepol's airfoil is an Eiffel 9> or 7 or some such thang.Darn close...Piet states in the '32 Flying + Glider Manual "...Don Finke, aneighbor who flies as though he were born in a plane, and myself sketchedit {the curve} out one night out of our heads....I am told by experts thatthe curve is practically an Eiffel 36 with ordinates increased 25% allalong the chord. Westy {Farmer} has all the dope at his fingertips, so hemust be right......Eiffel was a good engineer too, y'know. The Eiffel 36was the curve used by the Curtis Jennies."Ryan M.________________________________________________________________________________
> I used medicine bottles, the ID and OD of duct tape or elect tape..etc.> And by the way speaking of French curves, somewhere I read where>Pietepol's airfoil is an Eiffel 9> or 7 or some such thang.Darn close...Piet states in the '32 Flying + Glider Manual "...Don Finke, aneighbor who flies as though he were born in a plane, and myself sketchedit {the curve} out one night out of our heads....I am told by experts thatthe curve is practically an Eiffel 36 with ordinates increased 25% allalong the chord. Westy {Farmer} has all the dope at his fingertips, so hemust be right......Eiffel was a good engineer too, y'know. The Eiffel 36was the curve used by the Curtis Jennies."Ryan M.________________________________________________________________________________
Pietenpol-List: Re: simplicity
Original Posted By: fishin
>Just for the chuckle.> When I read this in the Doug Sheets post;>>......I assume that Mr. Pietenpol used a French Curve to generate theairfoil.........>>I remembered making some part (can't remember which) that had a curve and Istarted looking for something the right size to trace around to draw thecurve. After some experimenting I found that a three pound coffee can wasthe exact size I needed. I thought to myself, I'll bet that's exactly whatBernard did! Those cans haven't changed much over time. I really enjoy andadmire the genius of simplicity in his design.>>Bill Sayre>Another great designer of that time, that I admire for his simplicitythrough the years is Henry Mignet (designer of the Flying Flea). Is amazing how those men thought how to solve thing without the speciallydesigned "aproved" part.I have his HM-380 two seater, Is going to be my next project (I hope) and Ihave studied (and Admired) his plans for several months...A great book about his life, theory and planes, is "H. Mignet and his FlyingFleas". Very interesting to read. This English authors mention that he isthe European father of Homebuilt, and of course mention Mr. Pietenpol asthe American pioneer. I also think that is more educating and rewarding being a Homebuilder than a"kit" builder. Well both are pilots and "brothers".Saludos initial testing --------------EAA Chapter 1039 President | 1,835 VW 2 place "modified" 1932 Ramsey= BathtubDelegado Regional FEMEDA-FAI | FAI Legal Ultralight (224 Kg dry) (90%= finished)ggower(at)informador.com.mx | (modifying the wings) cover. 1999(?)---------------------------------------------------------------------------Flying WWP (Wife & Weather Permited) from (Private/Club Owned):Aerodromo "Paco Yerena" (For Ultralights and light planes ONLY) in Chapala:Alt 4,997' ASL N 20=BA18.610' W 103=BA09.606' (Grass) CT: PAK 123.45 Main Strip 14/32, 700 mts (2,300'Long 60'W) two more strips for cross windlanding.>>> Right Pattern to 14 (WARNING: flying over town forbidden)Visits Welcome, call in advance for instructions.Info: G. Gower, Apdo # 5-96 Chapalita, Zapopan Jalisco, 45040 MEXICO. VERY IMPORTANT: check Altitude ASL & power available for take off inadvance! (or bring your trailer :-)________________________________________________________________________________
>Just for the chuckle.> When I read this in the Doug Sheets post;>>......I assume that Mr. Pietenpol used a French Curve to generate theairfoil.........>>I remembered making some part (can't remember which) that had a curve and Istarted looking for something the right size to trace around to draw thecurve. After some experimenting I found that a three pound coffee can wasthe exact size I needed. I thought to myself, I'll bet that's exactly whatBernard did! Those cans haven't changed much over time. I really enjoy andadmire the genius of simplicity in his design.>>Bill Sayre>Another great designer of that time, that I admire for his simplicitythrough the years is Henry Mignet (designer of the Flying Flea). Is amazing how those men thought how to solve thing without the speciallydesigned "aproved" part.I have his HM-380 two seater, Is going to be my next project (I hope) and Ihave studied (and Admired) his plans for several months...A great book about his life, theory and planes, is "H. Mignet and his FlyingFleas". Very interesting to read. This English authors mention that he isthe European father of Homebuilt, and of course mention Mr. Pietenpol asthe American pioneer. I also think that is more educating and rewarding being a Homebuilder than a"kit" builder. Well both are pilots and "brothers".Saludos initial testing --------------EAA Chapter 1039 President | 1,835 VW 2 place "modified" 1932 Ramsey= BathtubDelegado Regional FEMEDA-FAI | FAI Legal Ultralight (224 Kg dry) (90%= finished)ggower(at)informador.com.mx | (modifying the wings) cover. 1999(?)---------------------------------------------------------------------------Flying WWP (Wife & Weather Permited) from (Private/Club Owned):Aerodromo "Paco Yerena" (For Ultralights and light planes ONLY) in Chapala:Alt 4,997' ASL N 20=BA18.610' W 103=BA09.606' (Grass) CT: PAK 123.45 Main Strip 14/32, 700 mts (2,300'Long 60'W) two more strips for cross windlanding.>>> Right Pattern to 14 (WARNING: flying over town forbidden)Visits Welcome, call in advance for instructions.Info: G. Gower, Apdo # 5-96 Chapalita, Zapopan Jalisco, 45040 MEXICO. VERY IMPORTANT: check Altitude ASL & power available for take off inadvance! (or bring your trailer :-)________________________________________________________________________________