Original Posted By: "Mark Roberts"
>From that quintessential tome, Theory of Wing Sections, the angle of attack is"the angle between the plane of the wing and the direction of motion."Not totally clear. If only the authors had stated whether the chord is, in fact,the chord of the wing. In fact, however, it would appear that the plane ofthe airfoil is indeed, the mean aerodynamic chord.Perhaps someone more knowledgeable can chime in?--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Wire spoke wheels size...
Pietenpol-List: Wire spoke wheels size...
Original Posted By: "Greg Cardinal"
In the current discussion of the height of the landing gear, I am wondering ifyou wire spoked wheel guys can tell me what wheels you chose, what size they arewhen inflated, and where you got them.I am drawing out my landing gear design from the "improved" gear design, but planto use wire spoked wheels, not 6" tires.So, I want to keep the overall height of the top of the fuse in the same locationas plans, but, that will require compensation for the additional height ofthe spoked wheels...Since I have not purchased the wheels, I am wondering what size I should be designingto match.Thanks!Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
In the current discussion of the height of the landing gear, I am wondering ifyou wire spoked wheel guys can tell me what wheels you chose, what size they arewhen inflated, and where you got them.I am drawing out my landing gear design from the "improved" gear design, but planto use wire spoked wheels, not 6" tires.So, I want to keep the overall height of the top of the fuse in the same locationas plans, but, that will require compensation for the additional height ofthe spoked wheels...Since I have not purchased the wheels, I am wondering what size I should be designingto match.Thanks!Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Re: Pietenpol-List: Wire spoke wheels size...
Original Posted By: "Mark Roberts"
Mark,On NX18235 we have 19" rims and the tires are Chen Shin 19 X 3.50 with the treads shaved off. Fully inflated they are about 25" tall.The tires were purchased from JC Whitney.Greg Cardinal----- Original Message -----
Mark,On NX18235 we have 19" rims and the tires are Chen Shin 19 X 3.50 with the treads shaved off. Fully inflated they are about 25" tall.The tires were purchased from JC Whitney.Greg Cardinal----- Original Message -----
Pietenpol-List: Re: Wire spoke wheels size...
Original Posted By: "taildrags"
Hello,I have recently acquired the bug to build a steel tube Pietenpol.- Spending my entire life in the air, in hangers and barns has left me with a love of craftsmanship. I am not ready to start actually building but more in the research stage. if anyone in the Cincinnati area will be in their shop or hanger this week, I would love to stop by and have a look at your project or completed aircraft.Thanks in advance for patience offered to a Pietenpol scrod...Best Regards,DaveRead this topic online here:http://forums.matronics.com/viewtopic.p ... 0#402320le, List Admin.________________________________________________________________________________Subject: Pietenpol-List: Re: Wire spoke wheels size...
Hello,I have recently acquired the bug to build a steel tube Pietenpol.- Spending my entire life in the air, in hangers and barns has left me with a love of craftsmanship. I am not ready to start actually building but more in the research stage. if anyone in the Cincinnati area will be in their shop or hanger this week, I would love to stop by and have a look at your project or completed aircraft.Thanks in advance for patience offered to a Pietenpol scrod...Best Regards,DaveRead this topic online here:http://forums.matronics.com/viewtopic.p ... 0#402320le, List Admin.________________________________________________________________________________Subject: Pietenpol-List: Re: Wire spoke wheels size...
RE: Pietenpol-List: Wire spoke wheels size...
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Mark,Mine are 21" x 3.00" aluminum rims, with Avon Speedmaster tyres (fromEngland). The wheels have 36 spokes, the hubs are 6" wide of my own design,machined from a solid billet of 6061 T651 aluminum. Spokes were custom made(rolled threads) and laced by Buchanan's in California. Brakes areCleveland 6" hydraulic disc brakes. Total weight of each wheel, completewith tire, tube and brake disc is 25 lbs.Anything else you need to know?Jack PhillipsNX899JPSmith Mountain Lake, Virginia-----Original Message-----
Mark,Mine are 21" x 3.00" aluminum rims, with Avon Speedmaster tyres (fromEngland). The wheels have 36 spokes, the hubs are 6" wide of my own design,machined from a solid billet of 6061 T651 aluminum. Spokes were custom made(rolled threads) and laced by Buchanan's in California. Brakes areCleveland 6" hydraulic disc brakes. Total weight of each wheel, completewith tire, tube and brake disc is 25 lbs.Anything else you need to know?Jack PhillipsNX899JPSmith Mountain Lake, Virginia-----Original Message-----
Pietenpol-List: Re: Wire spoke wheels size...
Original Posted By: "Mark Roberts"
Thanks guys... I was thinking that I might lay a .090 steel strap over the topof the ash and use plenty of bolts to sandich the ash block, but it sounds likesome of yu are using 3/4" ash, so maybe it is a moot point. I just needed tohave some input as to whether I was in the "safe" zone. I plan to make the bottomsteel straps all the way across the belly as well, as I can see hard landingspotentially an issue with my skill set
Thanks for the feedback.MarkRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Wire spoke wheels size...
Thanks guys... I was thinking that I might lay a .090 steel strap over the topof the ash and use plenty of bolts to sandich the ash block, but it sounds likesome of yu are using 3/4" ash, so maybe it is a moot point. I just needed tohave some input as to whether I was in the "safe" zone. I plan to make the bottomsteel straps all the way across the belly as well, as I can see hard landingspotentially an issue with my skill set
Thanks for the feedback.MarkRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Wire spoke wheels size...Pietenpol-List: Re: Wire spoke wheels size...
Original Posted By: "Bill Church"
Thanks Steve.... I might be over thinking the whole thing, but I want to be safe!Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Wire spoke wheels size...
Thanks Steve.... I might be over thinking the whole thing, but I want to be safe!Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Wire spoke wheels size...
Pietenpol-List: Re: Wire spoke wheels size...
Original Posted By: "Mark Roberts"
Mark,My rule of thumb is "when all else fails, read the instructions (plans)".In this case, referring to drawing No. 3 (split axle LG), we see that the drawingsrecommend 19" x 9" air wheels, but say that 24" x 4" or similar wheels mayalso be used. The 24" x 4" wheels would be the tall, skinny "motorcycle" wheels.As Greg mentioned, his wheels with 19" rims are about 25" tall when thetires are added. 21" rims typically produce a wheel that is about 27" diameter,when the tires get installed. Remember that the axle height is affected bythe RADIUS of the wheels. A 25" diameter wheel will have an axle that is 121/2" off the ground, and a 27" wheel will have an axle that is only 1" higher(13 1/2"). Going back to drawing No. 1, we see that the dimensions provided for W&B indicatea recommended longeron height of 51" - based on using 24" x 4" wheels.So, in summary, the landing gear should work fine as drawn, with tall wheels. If you choose to use taller wheels, it won't make much difference, but you couldadjust the geometry slightly to maintain the longeron height called for inthe plans.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/dwg_ ... ___Subject: Pietenpol-List: Re: Wire spoke wheels size...
Mark,My rule of thumb is "when all else fails, read the instructions (plans)".In this case, referring to drawing No. 3 (split axle LG), we see that the drawingsrecommend 19" x 9" air wheels, but say that 24" x 4" or similar wheels mayalso be used. The 24" x 4" wheels would be the tall, skinny "motorcycle" wheels.As Greg mentioned, his wheels with 19" rims are about 25" tall when thetires are added. 21" rims typically produce a wheel that is about 27" diameter,when the tires get installed. Remember that the axle height is affected bythe RADIUS of the wheels. A 25" diameter wheel will have an axle that is 121/2" off the ground, and a 27" wheel will have an axle that is only 1" higher(13 1/2"). Going back to drawing No. 1, we see that the dimensions provided for W&B indicatea recommended longeron height of 51" - based on using 24" x 4" wheels.So, in summary, the landing gear should work fine as drawn, with tall wheels. If you choose to use taller wheels, it won't make much difference, but you couldadjust the geometry slightly to maintain the longeron height called for inthe plans.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/dwg_ ... ___Subject: Pietenpol-List: Re: Wire spoke wheels size...
Original Posted By: "Jack Phillips"
Okay. Back at the hangar today and measured the spoked rims that I posted pixof a day or two ago. What I have are Takasago EXCEL aluminum rims with IRC tiresthat are 3.50-16, 4 ply rating. There are disk brakes fitted that appearto be Airheart 150x1 hydraulics. From the hangar floor to the top of the inflatedtire is about 23-1/4".Spoked wheels and narrow tires with brakes look like a really sweet combination,although I've never flown them.--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Okay. Back at the hangar today and measured the spoked rims that I posted pixof a day or two ago. What I have are Takasago EXCEL aluminum rims with IRC tiresthat are 3.50-16, 4 ply rating. There are disk brakes fitted that appearto be Airheart 150x1 hydraulics. From the hangar floor to the top of the inflatedtire is about 23-1/4".Spoked wheels and narrow tires with brakes look like a really sweet combination,although I've never flown them.--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
RE: Pietenpol-List: Re: Wire spoke wheels size...
Original Posted By: owner-pietenpol-list-server(at)matronics.com
21" x 3.00" is the tire size. The rim is 21" in diameter, and 3" wide.Outside diameter of the tire is 27", as Bill Church said.Jack PhillipsNX899JPSmith Mountain Lake, Virginia-----Original Message-----
21" x 3.00" is the tire size. The rim is 21" in diameter, and 3" wide.Outside diameter of the tire is 27", as Bill Church said.Jack PhillipsNX899JPSmith Mountain Lake, Virginia-----Original Message-----