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Giant Rc Foamie Biplane Scratch Build

Old 01-10-2009, 03:55 AM
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CHELLIE
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Build Review Giant Rc Foamie Biplane Scratch Build

HELP Now What Did I get Myself into Hi Everyone, This is my Attempt to make a Giant Scale Rc Foamie BiPlane, It will have a 6' Wing span and a 6' Fuselage, the fuselage will be made from 6mm depron, it will be a box in Fuselage, and the wing will be 9mm Depron, the wing will have a wood frame around it to help to stiffen it up and will also have 8.5mm carbon fiber tube for bracing, it will be powered by a 3520-7 towerpro motor, turning a 15x4 APC e Prop, on 4 cells, Wish me luck, as this is my first Giant Scale Foamy, It will be a Fun Project, and I am Sure I will Learn alot doing it, The BiPlane will Look a little like a Super Skybolt, but it will have both wings tappered back like a Ultimate bi plane, I had to make some special tools to draw the plans with and I tried to scale up a BiPlane picture, using a 1" to 9" scale, it seems to be working ok, here are a few sketches/Patterns that I am Making, and a picture of what i hope it will look Like when I am Done Take care, Chellie
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Last edited by CHELLIE; 01-10-2009 at 04:16 AM.
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Old 01-10-2009, 03:57 AM
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hopefully it will look something like this when i am Done with it




Well, i Got it Close anyway


pic taken on 3-29-09 during maiden flight Yea it flies
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Old 01-10-2009, 04:00 AM
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Chillie::This is just outta the ball-park cool girlfriend!! I will follow this with peak interest!! you bestist bub, steve
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Old 01-10-2009, 04:01 AM
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Sweet! I've been waiting for you to start this one, Chellie! I love your improvised compass for the cowl curve...
I've subscribed, I don't want to miss anything!
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Old 01-10-2009, 04:04 AM
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Originally Posted by stevecooper View Post
Chillie::This is just outta the ball-park cool girlfriend!! I will follow this with peak interest!! you bestist bub, steve
Thank You Steve Its going to be fun, I may or may not Succeed, but it will be fun trying Take care, Chellie
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Old 01-10-2009, 04:06 AM
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Originally Posted by xuzme720 View Post
Sweet! I've been waiting for you to start this one, Chellie! I love your improvised compass for the cowl curve...
I've subscribed, I don't want to miss anything!
Kewl I am going to give it my best shot, as they say Wish me luck, as this is new territory that I am venturing into Take care, Chellie
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Old 01-10-2009, 04:09 AM
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Originally Posted by CHELLIE View Post
Kewl I am going to give it my best shot, as they say Wish me luck, as this is new territory that I am venturing into Take care, Chellie
If past results are any indication, you won't need luck, Chellie! But since I don't think a 2M foamy bipe exists "yet", Good Luck!!

Last edited by xuzme720; 01-10-2009 at 04:16 AM. Reason: Cause I forgot to put "foamy", the main reason this build is so cool
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Old 01-10-2009, 04:10 AM
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Dang! You're gonna need a roof rack to haul that thing! Looks like a pretty sweet design. Pink and black scheme?
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Old 01-10-2009, 04:14 AM
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Originally Posted by birdDog View Post
Dang! You're gonna need a roof rack to haul that thing! Looks like a pretty sweet design. Pink and black scheme?
Hi BirdDog I have not really decided on the color yet, I just want to make sure its going to fly First I have a van, so that will help alot, I may have to take the seats out to haul it around Take Care, Chellie
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Old 01-10-2009, 04:16 AM
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WHOA thats gonna be awesome Chellie!Any idea what type of finish its going to have
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Old 01-10-2009, 04:19 AM
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Originally Posted by Rolling Thunder View Post
WHOA thats gonna be awesome Chellie!Any idea what type of finish its going to have
I will use tower coat heat film and red and black trim tape, But I just hope it Flies first Take care, Chellie

Last edited by CHELLIE; 01-18-2009 at 08:55 AM.
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Old 01-10-2009, 05:35 AM
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This will be interesting for sure! Any ideas on the power system? Will it have removable wings or are you going to buy a trailer?
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Old 01-10-2009, 05:59 AM
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Originally Posted by jasmine2501 View Post
This will be interesting for sure! Any ideas on the power system? Will it have removable wings or are you going to buy a trailer?
Hi Jasmine It will have a Towerpro 3520-7 motor on it with 4 cells and a 15x4 APC-E prop, the wings will be removable, I think I will use some nylon screws to hold them in place, I have a van, I might have to take out the seats to transport it Take care, Chellie


WEIGHT 305g
MAX EFFICIENCY 93% ??? I dont know about that
BATTERY 4 cell Li-poly battery
KV 670
PROPOLLER 13*8/14*7APC-E I think i can go up in dia. and down on pitch and use a 15x4 APC-E
CURRENT 1.2A-50A
VOLTAGE 14.8
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Old 01-10-2009, 06:13 AM
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Dang this is a Big Rudder 15" x 6 3/4" I dont think 9 gram HEX servos are going to work here
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Old 01-10-2009, 06:29 AM
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Originally Posted by CHELLIE View Post
Dang this is a Big Rudder 15" x 6 3/4" I dont think 9 gram HEX servos are going to work here
Use two!! silly ain't it? but it's work's! bub, steve
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Old 01-10-2009, 06:32 AM
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Thank Goodness The hard part is done, just getting an Idea of How the fuselage was going to look and size wise was a chore, Now that i have a pattern, the Rest is going to be EASY I Hope Take care, Chellie
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Old 01-10-2009, 06:35 AM
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Looks like an interesting project. I will watch for updates and hope it flies well for you.
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Old 01-10-2009, 06:37 AM
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Yeah, your going to need some full size servos for this one Chellie

Welcome to the big bird club! You're gonna like it a lot.

Dont worry about it flying - the bigger they are the better they fly!

Keep the wings parallel (that is the single most important detail for a good flying bipe) and get the cg in the ball park and it will be a ***** cat.

Also dont scrimp on the size of the controll surfaces. These big foamies tend to fly much much slower than there glow/gas cousins so they NEED larger controll surfaces to maintain controll at the lower speeds.

Even if you have no intention of ever doing any 3D - make all the surfaces over sized and have LOTS of throw.

That means you will need a good bit of torque from your servos to move those BIG surfaces. Id go at least 50-60 ounce on each aileron (assuming 4ea servos), 80-100 on the elevator and 60-100 on the rudder depending on its size. You know I like HUGE rudders, so I always go over kill there
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Old 01-10-2009, 06:38 AM
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Originally Posted by stevecooper View Post
Use two!! silly ain't it? but it's work's! bub, steve
Hi Steve, Good Idea, one to push and one to pull It should work, I have some standard size servos, that I am going to use, only because i want to move the weight forwards as much as possible, the tail feathers will have nyrod going to them, with the servos are far forwards as possible, I am using a old tower pro motor that i have here, because its a big boat anchor, its heavy, for the power that it delivers, but thats ok, because, i dont want to add any weight to the nose if i dont have too Take care, Chellie
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Old 01-10-2009, 06:40 AM
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By the way - if you cut the rudder and elevator with some balance area you can get by with smaller servos.
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Old 01-10-2009, 06:44 AM
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Originally Posted by Larry3215 View Post
Yeah, your going to need some full size servos for this one Chellie

Welcome to the big bird club! You're gonna like it a lot.

Dont worry about it flying - the bigger they are the better they fly!

Keep the wings parallel (that is the single most important detail for a good flying bipe) and get the cg in the ball park and it will be a ***** cat.

Also dont scrimp on the size of the controll surfaces. These big foamies tend to fly much much slower than there glow/gas cousins so they NEED larger controll surfaces to maintain controll at the lower speeds.

Even if you have no intention of ever doing any 3D - make all the surfaces over sized and have LOTS of throw.

That means you will need a good bit of torque from your servos to move those BIG surfaces. Id go at least 50-60 ounce on each aileron (assuming 4ea servos), 80-100 on the elevator and 60-100 on the rudder depending on its size. You know I like HUGE rudders, so I always go over kill there
Hi Larry Yes I want this bird to fly slow, I dont know if it will 3D with the motor I am going to use or not, but it should be fun, yes it will have big control surfaces too I like big control surfaces, More fun I have to look up the JR Ball Bearing servos that I have to find out what the oz of power is on them, Thank you for the input, Take care, Chellie
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Old 01-10-2009, 06:46 AM
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Originally Posted by Larry3215 View Post
By the way - if you cut the rudder and elevator with some balance area you can get by with smaller servos.
Great, I think thats what I will do, Thank you
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Old 01-10-2009, 06:49 AM
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Originally Posted by stevecooper View Post
Use two!! silly ain't it? but it's work's! bub, steve
Whoah them some new planes you got there stevebub?

GRU
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Old 01-10-2009, 06:54 AM
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Originally Posted by darylm44 View Post
Looks like an interesting project. I will watch for updates and hope it flies well for you.
Thank you, it should be fun

Originally Posted by groundrushesup View Post
Whoah them some new planes you got there stevebub?

GRU
I wish I had as many Toy Planes as Steve Does
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Old 01-10-2009, 06:58 AM
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Originally Posted by CHELLIE View Post
Thank you, it should be fun



I wish I had as many Toy Planes as Steve Does

What happened to my other post? Watt the Flyer?!?!

Anyways Chellie This is an awesome project, I will follow it closely.

I've always wanted to make a big pink monstrosity out of the foamula-2 board... maybe you'll be the inspiration!

GRU
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