Original Posted By: "Dallas L. Benham"
Dave,As far as I can figure, the model plywood is adequate for gussets. Fir willadd about ten per-cent weight to your wood structure, but is about 25%stronger, so you could, carefully, reduce dimensions some. Be aware that thismay have major consequences later when you try to fit things together, but ifyou are careful, and think things through thoroughly first, you should be ableto avoid major problems. I'm using some fir, and find it less pleasant towork with than spruce...it is more brittle, which makes it prone to splittingand it has nastier slivers. It is considerably cheaper, though, so you paysyour money and you takes your chances. Keep building!Don Cooley________________________________________________________________________________
Pietenpol-List: plywood and doug fir
Pietenpol-List: plywood and doug fir
Original Posted By: ADonJr(at)aol.com
Is there any reason not to order rib gusset plywood from Balsa USA? They are a model airplane supplier that sells1/16" birch ply in 12"x48" pieces. The price works out toabout $55 for a 4'x8'sheet. This is a whole lot cheaperthan AAS gets. Plus the little sheets are a lot easier tohandle.Also, how much weigh would building from Douglas Fir add?I am considering using local materials. The little sticksare easily gotten out of fir. I would probably still go with sitka for the spars and longerons.DaveHaven't ordered the plans yet but figuring out the options.________________________________________________________________________________
Is there any reason not to order rib gusset plywood from Balsa USA? They are a model airplane supplier that sells1/16" birch ply in 12"x48" pieces. The price works out toabout $55 for a 4'x8'sheet. This is a whole lot cheaperthan AAS gets. Plus the little sheets are a lot easier tohandle.Also, how much weigh would building from Douglas Fir add?I am considering using local materials. The little sticksare easily gotten out of fir. I would probably still go with sitka for the spars and longerons.DaveHaven't ordered the plans yet but figuring out the options.________________________________________________________________________________
Pietenpol-List: Re: plywood and doug fir
Original Posted By: Rcaprd(at)aol.com
The 1/16" birch plywood from Balsa USA is suitable for the gussets. I used itfor some of mine, and have used it extensively in building model r.c. planes,and find it a high quality plywood. Douglas Fir, acording to AC 43.13 - 1A / 2a, exceeds the strength of sprucebut is more difficult to work with, having a tendency to split and splinter.It is 10% heavier, but 10% stronger. I used it for my 3/4" spars, andlongerons. Port Orford Cedar is also a replacement for spruce, and is readilyavailable at local lumber stores. When choosing wood from the lumber store,you should take your time in selecting lumber with few knots (cut the knotsout) and straight grain. Chuck "A superior pilot uses superior judgment to avoid those situationswhich require the use of superior skill"________________________________________________________________________________
The 1/16" birch plywood from Balsa USA is suitable for the gussets. I used itfor some of mine, and have used it extensively in building model r.c. planes,and find it a high quality plywood. Douglas Fir, acording to AC 43.13 - 1A / 2a, exceeds the strength of sprucebut is more difficult to work with, having a tendency to split and splinter.It is 10% heavier, but 10% stronger. I used it for my 3/4" spars, andlongerons. Port Orford Cedar is also a replacement for spruce, and is readilyavailable at local lumber stores. When choosing wood from the lumber store,you should take your time in selecting lumber with few knots (cut the knotsout) and straight grain. Chuck "A superior pilot uses superior judgment to avoid those situationswhich require the use of superior skill"________________________________________________________________________________
Pietenpol-List: Re: plywood and doug fir
Original Posted By: "Dallas L. Benham"
John, Also, take a look athttp://www.aitwood.comparticularly their ultra-thin plywood section.WarrenJohn Duprey wrote:> ADonJr(at)aol.com wrote:> >>> Can someone give me the contact info for this source of plywood?>> Thanks> John> > Dave,> > As far as I can figure, the model plywood is adequate for gussets. Fir will> > add about ten per-cent weight to your wood structure, but is about 25%> > stronger, so you could, carefully, reduce dimensions some. Be aware that this> > may have major consequences later when you try to fit things together, butif> > you are careful, and think things through thoroughly first, you should be able> > to avoid major problems. I'm using some fir, and find it less pleasant to> > work with than spruce...it is more brittle, which makes it prone to splitting> > and it has nastier slivers. It is considerably cheaper, though, so you pays> > your money and you takes your chances. Keep building!> > Don Cooley________________________________________________________________________________
John, Also, take a look athttp://www.aitwood.comparticularly their ultra-thin plywood section.WarrenJohn Duprey wrote:> ADonJr(at)aol.com wrote:> >>> Can someone give me the contact info for this source of plywood?>> Thanks> John> > Dave,> > As far as I can figure, the model plywood is adequate for gussets. Fir will> > add about ten per-cent weight to your wood structure, but is about 25%> > stronger, so you could, carefully, reduce dimensions some. Be aware that this> > may have major consequences later when you try to fit things together, butif> > you are careful, and think things through thoroughly first, you should be able> > to avoid major problems. I'm using some fir, and find it less pleasant to> > work with than spruce...it is more brittle, which makes it prone to splitting> > and it has nastier slivers. It is considerably cheaper, though, so you pays> > your money and you takes your chances. Keep building!> > Don Cooley________________________________________________________________________________
Pietenpol-List: Re: plywood and doug fir
Original Posted By: Owen Davies
>ADonJr(at)aol.com wrote:>> >>Can someone give me the contact info for this source of plywood?>>Thanks >JohnBalsa USA advertises in RC Modeler (or at leat they did last timeI bought a copy). They are also at http://www.balsausa.com. I flew one of their kits for years. Dave ________________________________________________________________________________
>ADonJr(at)aol.com wrote:>> >>Can someone give me the contact info for this source of plywood?>>Thanks >JohnBalsa USA advertises in RC Modeler (or at leat they did last timeI bought a copy). They are also at http://www.balsausa.com. I flew one of their kits for years. Dave ________________________________________________________________________________
Pietenpol-List: Re: plywood and doug fir
Original Posted By: Ken Beanlands
John,I get mine at the local hobby shop, but I bet you could get a better priceordering from one of the Model Airplane magazines...they always used to havelots of ads for mail-order houses.Good hunting!Don Cooley________________________________________________________________________________
John,I get mine at the local hobby shop, but I bet you could get a better priceordering from one of the Model Airplane magazines...they always used to havelots of ads for mail-order houses.Good hunting!Don Cooley________________________________________________________________________________
Pietenpol-List: Re: plywood and doug fir
Original Posted By: Warren Shoun
ADonJr(at)aol.com wrote:> Can someone give me the contact info for this source of plywood?Thanks John> Dave,> As far as I can figure, the model plywood is adequate for gussets. Fir will> add about ten per-cent weight to your wood structure, but is about 25%> stronger, so you could, carefully, reduce dimensions some. Be aware that this> may have major consequences later when you try to fit things together, but if> you are careful, and think things through thoroughly first, you should be able> to avoid major problems. I'm using some fir, and find it less pleasant to> work with than spruce...it is more brittle, which makes it prone to splitting> and it has nastier slivers. It is considerably cheaper, though, so you pays> your money and you takes your chances. Keep building!> Don Cooley________________________________________________________________________________
ADonJr(at)aol.com wrote:> Can someone give me the contact info for this source of plywood?Thanks John> Dave,> As far as I can figure, the model plywood is adequate for gussets. Fir will> add about ten per-cent weight to your wood structure, but is about 25%> stronger, so you could, carefully, reduce dimensions some. Be aware that this> may have major consequences later when you try to fit things together, but if> you are careful, and think things through thoroughly first, you should be able> to avoid major problems. I'm using some fir, and find it less pleasant to> work with than spruce...it is more brittle, which makes it prone to splitting> and it has nastier slivers. It is considerably cheaper, though, so you pays> your money and you takes your chances. Keep building!> Don Cooley________________________________________________________________________________