what is chordwise
02-06-2009 | 11:14 AM
#3
RE: what is chordwise
In what context did you see it? Chord is the measurement of the wing perpendicular to the span. For instance you could have a 60" span with an 11" chord. You could have seen "chordwise" used to describe something laid out parallel to the wing chord?
02-06-2009 | 11:31 AM
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From: lake peekskill,
NY
RE: what is chordwise
I read a message were someone installed there tail fin off by a 1/8 inch and they were told it had to be removed because of chordwise would make the
plane yaw. I have the same plane as this guy and I am ready to install the tail and don't want this to hapen to me.
plane yaw. I have the same plane as this guy and I am ready to install the tail and don't want this to hapen to me.
02-06-2009 | 11:52 AM
#5
RE: what is chordwise
The only time I have heard this term used is in building wings out of coroplast for SPADs. The coroplast has flutes in it, like cardboard. If the flutes run front to back on the wing, they are chordwise flutes. If the flutes run from the fuselage to the wingtip, they run spanwise. It just has to do with which way you fold the material.
The usage of the word in your question doesn't make any sense to me.
Good luck
The usage of the word in your question doesn't make any sense to me.
Good luck
02-06-2009 | 12:13 PM
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From: Oklahoma City,
OK
RE: what is chordwise
ORIGINAL: wzak29
I read a message were someone installed there tail fin off by a 1/8 inch and they were told it had to be removed because of chordwise would make the
plane yaw. I have the same plane as this guy and I am ready to install the tail and don't want this to hapen to me.
I read a message were someone installed there tail fin off by a 1/8 inch and they were told it had to be removed because of chordwise would make the
plane yaw. I have the same plane as this guy and I am ready to install the tail and don't want this to hapen to me.
02-06-2009 | 12:16 PM
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From: lake peekskill,
NY
RE: what is chordwise
Original post:
I am building a pt40 and happened to notice that when I mounted the tail fin I didn't get it perfectly straight. Stupid mistake, not paying attention and allowing myself to get distracted. It's not off by much, maybe 1/8", to the right. Is this going to hurt anything? Will it be fly-able like this? It's glued on pretty good so I don't know that I'll be able to get it off to fix it. Any other reccomendations or ideas? Thanks.
Reply:
If the vertical fin is off by 1/8" chordwise, then you'll have noticeable yaw added, and the rudder and ailerons will have to fight it. That must be corrected...repeat MUST. You'll have to carefully cut the structure apart to fix it.
Now, if the vertical fin tilts off the vertical by a small amount, but is straight when you check front to rear, it won't affect much at all, and can be safely ignored.
_____________________________
Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: [email protected]
I am building a pt40 and happened to notice that when I mounted the tail fin I didn't get it perfectly straight. Stupid mistake, not paying attention and allowing myself to get distracted. It's not off by much, maybe 1/8", to the right. Is this going to hurt anything? Will it be fly-able like this? It's glued on pretty good so I don't know that I'll be able to get it off to fix it. Any other reccomendations or ideas? Thanks.
Reply:
If the vertical fin is off by 1/8" chordwise, then you'll have noticeable yaw added, and the rudder and ailerons will have to fight it. That must be corrected...repeat MUST. You'll have to carefully cut the structure apart to fix it.
Now, if the vertical fin tilts off the vertical by a small amount, but is straight when you check front to rear, it won't affect much at all, and can be safely ignored.
_____________________________
Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: [email protected]
02-06-2009 | 12:25 PM
#8
RE: what is chordwise
Sounds like you saw a mis-use of the term to me. Just follow the the instructions that came with the plane and remember to "measure twice, cut (or glue) once" and you will be fine.
02-06-2009 | 12:38 PM
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From: lake peekskill,
NY
RE: what is chordwise
I'm building using 1/16" tolerences is this ok? I used this to draw a center line on my stab.
did not glue it but will soon. I can't see how a 1/8" can mean that much am I wrong?
did not glue it but will soon. I can't see how a 1/8" can mean that much am I wrong?
02-06-2009 | 12:40 PM
#10
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RE: what is chordwise
One method to remove items that are glued on..... is to take a cheap plastic box cutter and heat its blade ( propane/heat gun/wife's hair dryer, etc. ). Use the heated blade to cut through and loosen the glue. You may have to re-heat the blade a number of times to get all of the way through the glued joint. rich
02-06-2009 | 12:49 PM
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From: Oklahoma City,
OK
RE: what is chordwise
ORIGINAL: wzak29
Original post:
I am building a pt40 and happened to notice that when I mounted the tail fin I didn't get it perfectly straight. Stupid mistake, not paying attention and allowing myself to get distracted. It's not off by much, maybe 1/8", to the right. Is this going to hurt anything? Will it be fly-able like this? It's glued on pretty good so I don't know that I'll be able to get it off to fix it. Any other reccomendations or ideas? Thanks.
Reply:
If the vertical fin is off by 1/8" chordwise, then you'll have noticeable yaw added, and the rudder and ailerons will have to fight it. That must be corrected...repeat MUST. You'll have to carefully cut the structure apart to fix it.
Now, if the vertical fin tilts off the vertical by a small amount, but is straight when you check front to rear, it won't affect much at all, and can be safely ignored.
_____________________________
Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: [email protected]
Original post:
I am building a pt40 and happened to notice that when I mounted the tail fin I didn't get it perfectly straight. Stupid mistake, not paying attention and allowing myself to get distracted. It's not off by much, maybe 1/8", to the right. Is this going to hurt anything? Will it be fly-able like this? It's glued on pretty good so I don't know that I'll be able to get it off to fix it. Any other reccomendations or ideas? Thanks.
Reply:
If the vertical fin is off by 1/8" chordwise, then you'll have noticeable yaw added, and the rudder and ailerons will have to fight it. That must be corrected...repeat MUST. You'll have to carefully cut the structure apart to fix it.
Now, if the vertical fin tilts off the vertical by a small amount, but is straight when you check front to rear, it won't affect much at all, and can be safely ignored.
_____________________________
Bill Baxter, Manager Hobby Services/Futaba Service/North America
3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
Service Phone: 217 398-0007
Email: [email protected]
02-06-2009 | 03:04 PM
#13
RE: what is chordwise
ORIGINAL: brett65
It makes more sense now. He used it right, because he is saying that when looking straight down on the tail fin from above it looks like this / . When it should be straight inline with the fuse, which is in the chordwise direction. I bet RCKen or MinnFlyer have a good pictorial example somewhere. Yes, 1/16 should be fine.
It makes more sense now. He used it right, because he is saying that when looking straight down on the tail fin from above it looks like this / . When it should be straight inline with the fuse, which is in the chordwise direction. I bet RCKen or MinnFlyer have a good pictorial example somewhere. Yes, 1/16 should be fine.
Regardless, just get it as straight as you possibly can and it will be fine. I've seen some very crooked airplanes that could be trimmed out and flown. They may not fly ideally but they can fly. I'm not advocating building anything but straight of course.
02-06-2009 | 03:29 PM
#14
RE: what is chordwise
If the vertical fin is "twisted" or rotated in relation to the fuselage centerline it will cause the plane to yaw slightly. If the vertical fin is offset slightly from being on the centerline of the fuselage the effect would not be very noticeable but should still be avoided. If the vertical fin is mounted properly but leans slightly it will induce a slight amount of pitch when the rudder is moved (like V-tails).
Full scale single engine A/C actually have their vertical fins "twisted" or "rotated" slightly to compensate for engine rotation. German built ME-109 A/C had their Verticals offset in one direction but Spanish built ME-109's were offset the opposite way because their engines rotated in the opposite direction. The ME-109 in Harlingen,Tx was Spanish with a German motor retrofit. VERY hard to fly I heard for this reason.
Full scale single engine A/C actually have their vertical fins "twisted" or "rotated" slightly to compensate for engine rotation. German built ME-109 A/C had their Verticals offset in one direction but Spanish built ME-109's were offset the opposite way because their engines rotated in the opposite direction. The ME-109 in Harlingen,Tx was Spanish with a German motor retrofit. VERY hard to fly I heard for this reason.
