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Old Sep 16, 2008, 02:16 AM
Park Jet Guru
jetset44's Avatar
Seattle, WA
Joined Jun 2002
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Quote:
Originally Posted by larryross
Jetset44... Has anybody thought about making it a little bigger? I am old and slow I need a plane that is at least 60" and can fly slow. What do you think increasing the size will do to the fly-ability? I thought about doubling the plans, in fact I have them printed. I am in the middle of a couple of builds right now. Sure would like to start this one now. Let me know what you think about doubling the plans to 2x and what problems you think I might run into.

Larry
Sure, if built larger but similarly the wing loading would get even lighter and the model would get slower and easier to fly. Doubling the plans would result in a LARGE airplane for a foam model, but it'll work. Keep in mind the wing loading on this bird is only 8 oz/sq ft as is, which is light even by parkflyer standards! So this model slows down quite well already at the current size, I think. But it'll be even easier to fly at double the size.
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Old Sep 16, 2008, 02:23 AM
Park Jet Guru
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Seattle, WA
Joined Jun 2002
5,616 Posts
Quote:
Originally Posted by Tripod333
Hello, i am just starting out in rc flight. i've built an Electric Orange depron cub and one of the epp f22's(out of foamboard). I just added aeilerons to my cub this week, ready to test it out!

my question is...

I seem to have used a similar linkage method as you did on your elevons for my cub's aeilerons. could you post a few details on this part of build? or anyone elses build.

What about any possible modifications for this design for someone who planned on landing in grass only?
Sure, I've posted a few photos of my strip aileron installation below.

As for grass, NO modifications are required except to strengthen the bottom of the fuselage appropriately to withstand the bumps. You could use a couple layers of packing tape (like I did), or go all out and fiberglass the bottom.

Steve
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Old Sep 16, 2008, 06:18 AM
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Joined Jun 2008
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Awsome, that's pretty much the same way i did mine. looks like the same dubro couplers. is your wire threaded? Mine was not, i just scarred the wire and used CA. Should i be worried about using CA in such an important location?

Was any thought given to the legnth of the linkages or was the tight space the deciding factor? What i mean is, if you use a wire/dubro that is the same legnth as your servo arm you get the same degree of travel on the control surface as the servo moves. If you make the wire/dubro shorter than the servo arm you get more degrees of travel on the surface...requireing more torque, ect...such as gear ratios work.

My appologies for asking a question about my plane on your thread. I hope you dont mind as we are using the same build technique. I'm sure other people use this style of linkage but you are only the second i've seen personally.
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Old Sep 16, 2008, 01:56 PM
We shall serve the Lord
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United States, TX, Kingsland
Joined Sep 2005
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Subscribed.
McD
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Last edited by kingsflyer; Dec 25, 2008 at 10:25 AM.
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Old Sep 16, 2008, 02:16 PM
Too lazy to repair!
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Round Rock, Tx
Joined Oct 2002
3,396 Posts
Quote:
Originally Posted by jnida63
Thanks for the post. It looks like this motor is a little bigger than the GBx stuff.

Joe
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Old Sep 16, 2008, 02:32 PM
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Grand Junction, Colorado
Joined Dec 2007
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Quote:
Originally Posted by jetset44
Sure, if built larger but similarly the wing loading would get even lighter and the model would get slower and easier to fly. Doubling the plans would result in a LARGE airplane for a foam model, but it'll work. Keep in mind the wing loading on this bird is only 8 oz/sq ft as is, which is light even by parkflyer standards! So this model slows down quite well already at the current size, I think. But it'll be even easier to fly at double the size.

Great double scale it'll be. As I said I already have the templates printed. I will start on it as soon as I finish the two I am working on now (maybe before ). I can't seem to get one finished before I find another to build at this rate I will never learn to fly them. I will have a huge hanger before I learn to fly.
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Old Sep 16, 2008, 03:36 PM
SG Talon... Super Genius.
Lenox, Michigan
Joined Nov 2005
3,161 Posts
DO NOT USE PINK!!!

I built 1 model out of the pink stuff and it was terrible.

I weighed the foam. 6.5 oz for a 24"x48" sheet of Pink - 4 oz. for a sheet of blue!!!

Plus it is not as strong, the skin changes thickness by about 10x over a single sheet!!! one end it is nearly measurable in thickness the other end is so thin that you can't even peel it!

This is a great design though. I am thinking of building one but my concern is that once my gear is in there it is permanently in there.

I would need to make some modifications to the design so i can get my stuff out when i need them for another plane.
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Old Sep 17, 2008, 08:13 AM
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I have a Northstar and I would like to build a Polaris this winter. I haven't built a foam plane before so how do I get a set of plans and the building instructions for the T-38.
Brian, cheadleb@magma.ca
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Old Sep 17, 2008, 08:35 AM
Slipping the Surly Bonds
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Attica, MI
Joined Dec 2006
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Quote:
Originally Posted by cheadleb
I have a Northstar and I would like to build a Polaris this winter. I haven't built a foam plane before so how do I get a set of plans and the building instructions for the T-38.
Brian, cheadleb@magma.ca
Here is the T-38 Plans link

http://www.rcgroups.com/forums/showp...0&postcount=14

Not sure where the building instructions are though.

Ken
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Old Sep 17, 2008, 10:07 AM
Pusher jets rule!
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Mesa, AZ
Joined Jan 2006
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Instruction Guides for all of Steve's kits can be found on the 6mmFlyRC website (under "Original Series"). Here's a link to the instructions page:

http://www.6mmflyrc.com/kit-instructions/

Pat
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Old Sep 17, 2008, 06:17 PM
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Old Sep 17, 2008, 06:20 PM
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Brunswick, Ohio
Joined Jul 2005
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I'd like to cut this out on my Phlatprinter when I get it. Have any cad files you wouldn't mind posting to ease the process?

Thanks!
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Old Sep 17, 2008, 11:39 PM
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United States, IN, Indianapolis
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I have a set of dxf files on 3 sheets of depron that I plan to use on my cnc
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Old Sep 18, 2008, 12:21 AM
Park Jet Guru
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Seattle, WA
Joined Jun 2002
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Quote:
Originally Posted by Bohh33
I'd like to cut this out on my Phlatprinter when I get it. Have any cad files you wouldn't mind posting to ease the process?

Thanks!
Well, actually I just started working with a kit manufacturer to develop a kit of the Polaris, and to help protect their interests I won't be making the CAD files for this design publicly available. I hope you understand.

Stay tuned for more details soon about the new kit!

Steve
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Old Sep 18, 2008, 12:23 AM
Park Jet Guru
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Seattle, WA
Joined Jun 2002
5,616 Posts
By the way, I've also started developing an illustrated construction guide for the Polaris to support the new kit, and of course once it's done I'll create and post a separate version for the scratchbuilders. Should be done within a week.

Steve
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