Giant Rc Foamie Biplane Scratch Build
02-03-2009, 04:28 AM
#226
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[quote=CHELLIE;557370][quote=stevecooper;557154]
ChellieOne:: silver solder a piece across the cut span on those wheels so it don't squat on you,,
lot of plane come'in in!
! bub, steve
I might need a wider landing gear 
Hi Steve I was thinking about cutting the landing gear, in two, and making it wider, that should work ok, and adding some wire half circles under the bottom wing tips for a scuff Guard, i know I am going to drop a wing 
or maybe some wing tip Training wheels 
It already Has a BiPlane Murphy Training Wing on it 
, Take care, Chellie
Hi Steve
I was thinking about cutting the landing gear, in two, and making it wider, that should work ok, and adding some wire half circles under the bottom wing tips for a scuff Guard, i know I am going to drop a wing or maybe some wing tip Training wheels It already Has a BiPlane Murphy Training Wing on it , Take care, Chellie
lot of plane come'in in!! bub, steve
02-03-2009, 10:00 AM
#227
Huffy01
Join Date: Dec 2008
Location: Australia
Posts: 587
I'd suggest you find another landing gear. It would a shame to cut it up.
May be buy some aluminium flat bar. drill hole for the wheel's ,then find out where your bend's go and stick it in a vise and bend away.
May be buy some aluminium flat bar. drill hole for the wheel's ,then find out where your bend's go and stick it in a vise and bend away.
02-03-2009, 02:34 PM
#229
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Join Date: Jul 2005
Location: Moorpark, Ca
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[QUOTE=CHELLIE; and adding some wire half circles under the bottom wing tips for a scuff Guard, i know I am going to drop a wing [/QUOTE]
Chellie,
Here's a little trick that I've used for just what you mention. Take an old GWS wheel, a-la slow-stick or TM 400. Cut out the hub and pin-wheel spokes, cut into 2 equal halves and walaah! wing tip half circle skids. Attach as you would a set of wire skids at a fraction of the weight. Your plane looks great
Good luck!
Rick
Chellie,
Here's a little trick that I've used for just what you mention. Take an old GWS wheel, a-la slow-stick or TM 400. Cut out the hub and pin-wheel spokes, cut into 2 equal halves and walaah! wing tip half circle skids. Attach as you would a set of wire skids at a fraction of the weight. Your plane looks great
Good luck!Rick
02-03-2009, 06:39 PM
#230
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Originally Posted by RickAvery
Chellie,
Here's a little trick that I've used for just what you mention. Take an old GWS wheel, a-la slow-stick or TM 400. Cut out the hub and pin-wheel spokes, cut into 2 equal halves and walaah! wing tip half circle skids. Attach as you would a set of wire skids at a fraction of the weight. Your plane looks great Good luck!
Rick
Here's a little trick that I've used for just what you mention. Take an old GWS wheel, a-la slow-stick or TM 400. Cut out the hub and pin-wheel spokes, cut into 2 equal halves and walaah! wing tip half circle skids. Attach as you would a set of wire skids at a fraction of the weight. Your plane looks great
Good luck!Rick
,, Gotta try that! your bub, steve
02-04-2009, 03:37 AM
#234
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Thank you Everyone for the complements & suggestions, they are all great Ok now i have to decide which one to use 
I think I may just bend up a piece of aluminum, and make a landing gear, the landing gear in the pic, was the Largest one Hobby King Had, I was also thinking about making 2 halfs, they sell them like that too, I will take a good hard look at it 
The fuselage is long, so I think the steering tail wheel i bought should be ok there, This sure is turning out to be a Project but its fun, I have Friday and Monday off from work, Yeaaaaa so I will devote some more time to it, Take care, Chellie
Ok now i have to decide which one to use I think I may just bend up a piece of aluminum, and make a landing gear, the landing gear in the pic, was the Largest one Hobby King Had, I was also thinking about making 2 halfs, they sell them like that too, I will take a good hard look at it The fuselage is long, so I think the steering tail wheel i bought should be ok there, This sure is turning out to be a Project but its fun, I have Friday and Monday off from work, Yeaaaaa so I will devote some more time to it, Take care, Chellie
02-04-2009, 05:58 AM
#235
Look out for that tree!!!
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Originally Posted by starcad
Chellie, you could extend the tail wheel wire to where it extends just past the end of the rudder, thus a longer moment. Turns un-tamely beasts into kittens.
Id recommend keeping the pivot point aligned with the rudder hinge and dont have a long lever arm on the wheel. Im especially fond of the Sullivan type for 'lighter' giant scale models. Once you get much over 16-18 pounds or so you need to look at other options.
02-04-2009, 06:02 AM
#236
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Originally Posted by Larry3215
That technique works well on smaller models but on giant scale its really hard on the rudder servo gears when you're landing - especially if there is any cross wind at all.
Id recommend keeping the pivot point aligned with the rudder hinge and dont have a long lever arm on the wheel. Im especially fond of the Sullivan type for 'lighter' giant scale models. Once you get much over 16-18 pounds or so you need to look at other options.
Id recommend keeping the pivot point aligned with the rudder hinge and dont have a long lever arm on the wheel. Im especially fond of the Sullivan type for 'lighter' giant scale models. Once you get much over 16-18 pounds or so you need to look at other options.
I like the Sullivan tail wheel, with the spring arm, those work great IMHO , Take care, Chellie
02-05-2009, 02:00 AM
#238
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Originally Posted by Biplane Murphy
Looks Great Chellie.
BTW where is the CG located on your Biplane is it 25% from the leading edge of your top wing Thank you in advance, Take care, Chellie
02-05-2009, 02:27 AM
#239
Look out for that tree!!!
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Chellie, if your wings have sweep and are staggared like in the drawings you had at the beginning, your going to want the CG a lot further back that 25% of the top wing.
Here is a wing CG calculator that works well for swept wing setups.
http://www.palosrc.com/instructors/cg.htm
Id would calculate the 25% CG location for each wing on its own. Then set the over all CG for the plane at the point mid way between those two locations.
Id guess you will end up closer to the leading edge of the lower wing point where it joins the fuse - depending on the degree of sweep and the amount of stagger. You may end up further back than that - again depending on how much sweep and stagger you end up with.
My Ultimates usually flew best for patern work around that point and were best for 3D a little further back. Your drawings show more stagger than the typical Ultimate though.
Here is a wing CG calculator that works well for swept wing setups.
http://www.palosrc.com/instructors/cg.htm
Id would calculate the 25% CG location for each wing on its own. Then set the over all CG for the plane at the point mid way between those two locations.
Id guess you will end up closer to the leading edge of the lower wing point where it joins the fuse - depending on the degree of sweep and the amount of stagger. You may end up further back than that - again depending on how much sweep and stagger you end up with.
My Ultimates usually flew best for patern work around that point and were best for 3D a little further back. Your drawings show more stagger than the typical Ultimate though.
Last edited by Larry3215; 02-05-2009 at 02:32 AM. Reason: changed link to the one I wanted in the first place
02-05-2009, 02:31 AM
#240
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Originally Posted by Larry3215
Chellie, if your wings have sweep and are staggared like in the drawings you had at the beginning, your going to want the CG a lot further back that 25% of the top wing.
Here is a wing CG calculator that works well for swept wing setups.
http://adamone.rchomepage.com/cg_calc.htm
Id would calculate the 25% CG location for each wing on its own. Then set the over all CG for the plane at the point mid way between those two locations.
Id guess you will end up closer to the leading edge of the lower wing point where it joins the fuse - depending on the degree of sweep and the amount of stagger. You may end up further back than that - again depending on how much sweep and stagger you end up with.
My Ultimates usually flew best for patern work around that point and were best for 3D a little further back. Your drawings show more stagger than the typical Ultimate though.
Here is a wing CG calculator that works well for swept wing setups.
http://adamone.rchomepage.com/cg_calc.htm
Id would calculate the 25% CG location for each wing on its own. Then set the over all CG for the plane at the point mid way between those two locations.
Id guess you will end up closer to the leading edge of the lower wing point where it joins the fuse - depending on the degree of sweep and the amount of stagger. You may end up further back than that - again depending on how much sweep and stagger you end up with.
My Ultimates usually flew best for patern work around that point and were best for 3D a little further back. Your drawings show more stagger than the typical Ultimate though.
02-05-2009, 02:31 AM
#241
2 Wings, Twice The Fun
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Originally Posted by CHELLIE
Thank you Chris BTW where is the CG located on your Biplane is it 25% from the leading edge of your top wing Thank you in advance, Take care, Chellie
BTW where is the CG located on your Biplane is it 25% from the leading edge of your top wing Thank you in advance, Take care, ChellieBut the real deal with the bipes is:
Find 27% from the leading edge of both top and bottom. Then find the median point of those 2 locations.
That way, no matter what % of stagger your wings have, you can find the right spot.
However, 1 swept back wing and the other straight, can affect that some.
Hope this helps.
02-05-2009, 02:41 AM
#244
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Originally Posted by CHELLIE
Thank You Larry, Yes there is a little stagger in the wings, thank you for the link, Take care, Chellie
I never fly tail heavy but I ain't got no Butt anymore anyhoo!
02-05-2009, 02:48 AM
#245
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Thank you Larry and Chris My wings dont have a lot of sweep to them, very little, I would rather be a little nose heavy on the maiden flight its getting there, My Scratch built Katana, that I made for MiniSteve beat a stock C Stryker Thats Funny, I used a section of 3/8" X 3/8" Square CF in the Wing, because i know how Steve flies I had to make it strong For him,
http://vimeo.com/3061750?pg=embed&sec=3061750
Originally Posted by ministeve2003
you Beat a Stryker with a 3D Plane
Originally Posted by CHELLIE you Beat a Stryker with a 3D Plane
yep...hehehe.... and Charlie now wants to buy the same turnigy motor we got on Daniels Stryker so he can go abit faster.... I don't think he likes the idea of a 3d foamy going faster than his styker...LOL
SK
My wings dont have a lot of sweep to them, very little, I would rather be a little nose heavy on the maiden flight its getting there, My Scratch built Katana, that I made for MiniSteve beat a stock C Stryker Thats Funny, I used a section of 3/8" X 3/8" Square CF in the Wing, because i know how Steve flies I had to make it strong For him, http://vimeo.com/3061750?pg=embed&sec=3061750
Originally Posted by ministeve2003
Since the video never shows how fast the katana was, I don't have footage yet to doppler it, but I do know it pulled away from Charlies stock stryker-C fairly well... I think thats Pretty dang good for a flat 9mm depron plane....LOL
Power system on it was...
turnigy 40amp esc
turnigy SK series 35x36x910kv
apc 12x8e prop
4cell 1500mah rhino battery
4 hxt900 servos...
SK
Power system on it was...
turnigy 40amp esc
turnigy SK series 35x36x910kv
apc 12x8e prop
4cell 1500mah rhino battery
4 hxt900 servos...
SK
you Beat a Stryker with a 3D Plane Originally Posted by CHELLIE
you Beat a Stryker with a 3D Plane SK
02-05-2009, 09:01 AM
#247
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Hi Everyone well I got a little more done, I finished the top wing, I used some low heat towercoat covering and some trim tape, just One more wing to go 
why do BiPlanes have 2 wings Take care, Chellie
well I got a little more done, I finished the top wing, I used some low heat towercoat covering and some trim tape, just One more wing to go why do BiPlanes have 2 wings Take care, Chellie
