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Will THis Work

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Old 03-01-2006 | 09:59 PM
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From: Russell, KS
Default Will THis Work

Before you guys and gals say what the heck, just read the post, dont look at the pic and post. On the pic say its straight and up to scale. Do you guys think that this will work. This is some thing I would scratch build with out plans just to see if it would work. Here would be the following specs:

Twin 70mm brushless fans and esc to go with
2 6.5g servos
3 cell lipo
elevon control with elevator and canard contol
This jet is hand toss
landing gear NA

So say this would work how fast "wild guess" would it go and like I asked before will this work.

THis came off the top of my head.
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Old 03-02-2006 | 07:18 AM
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Default RE: Will THis Work

Nitro, I think demisions would help in determining if it will work, I like the design, it's a tad simular to one I have drawn up to build soon
I think your gonna have a prob with your wing area being cabable of supporting decent flight, however the size of the fuse may counter that. I think you will need to center your EDF to get to CG as this design will be tough to ballance, IMO you need to give the wings a little more cord, you can add to full length or just taper it from mid wing to fuse to give more surface area to work with
I must say if it does work it would be pretty fast. one last thing, are you going to build this flat foam or full 3-D body, if 3-D I don't think it will fly very stable, if flat you can use the fuse as part of the needed surface area. Give the overall deminsions your thinking it will be and ask again. Good luck with it
Old 03-02-2006 | 05:57 PM
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From: Russell, KS
Default RE: Will THis Work

I was thinking along of the following:

Semi Scale " full bodied, not 3-d profiled"
Fuse 40" long about about 5 to 6" in wide
Wing 9"in wide and 30in wing span
Canard 8" by 9"
elevator 9" by 10"

Hope this works
Old 03-03-2006 | 07:42 AM
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Default RE: Will THis Work

nitro, here is pretty much the only place to get depron on the net http://www.depronusa.com/
you can also use blue core that can be picked up at lowes or home depot, that runs about 35.00 per pack of 23 sheets
also you can get resourcfull and find depron by picking up platters used for packing meat for the smaller parts, grocery stores, wal-mart, and party stores have them, I have had grocery stores just give me a few for the asking. Now I'm just guessing but using your deminsions I'm thinking your going to be around 19 to 23 oz AUW using full 3-D build depending on foam used, keeping that in mind I still feel your wing is going to be a weak point in relation to stable flight, deminsion wise it sounds good if wing TE and elev LE meet you will have 4.66" from wing LE to canard TE, if you stay with your current wing config I would suggest extra CF to prevent flexing or curling under hard manuvers, they are going to want to twist or tuck under at the tips at high speeds or hard turns, this can cause uncontrolable spiral dives as well as make it bad to tip stall. One last note with the exception of swept back full wings like on the F-18 as a rule of thumb you want the wing span to be greater than the fuse length, I think it can work and would like to see it when your done,,, so I am going to follow your post here I might get some ideas for mine as well, Good luck with it, I hope it works
That was a hint to turn this into a build thread or you could join us at fun with flat foam thread in the foamy section, we are trying to start a thread that covers all kinds of foam built planes, scratch ideas or tiled plans alike, most of us are begginners at building but I'm hoping to get some seasoned builders interested in sharing their ideas and builds there
Old 03-03-2006 | 10:23 PM
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From: Russell, KS
Default RE: Will THis Work

By 3-d are you meaning like the Great Planes flat outs
Old 03-03-2006 | 10:30 PM
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Default RE: Will THis Work

Hi You guys can get depron and zepron at this dealer 25 sheets min. but you can mix and match.
http://www.nyblimp.com/zepron.htm
Old 03-03-2006 | 10:35 PM
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Default RE: Will THis Work

Nitro, in this case I'm meaning full fuse, not flat profile design, I'm still new to the whole 3-D thing, I always thought 3-D meant full body design, not flying capabilities. I did understand you intend for this design to be full bodied fuse, I am gonig for the same thing with my design, I'm bilding a downloaded F-15 plan now to get the understanding of how to take my idea from lines on paper to completed plane, I fully intend on flying the F-15 as well, I'm going to take it's fuse and adapt it to work for my plane.
Old 03-03-2006 | 11:01 PM
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From: Russell, KS
Default RE: Will THis Work

I got to more drawings of the jet in the 3-d profile but now iam also changed the motor to brushless out runner and lessen the sweap
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Old 03-04-2006 | 06:11 AM
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Default RE: Will THis Work

Nitro [sm=thumbup.gif] now that should work, looks good, go for it
Old 03-07-2006 | 08:18 AM
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Default RE: Will THis Work

Andy Lennon has written a book entitled "Designing R/C Models" or something like that. He has devoted a chapter to forward swept wing plan forms, how to determine the CoG, etc. Might be worth a look.
Old 03-07-2006 | 12:55 PM
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Default RE: Will THis Work

Here is a nice plane with swept forward wings and a canard ... it a powered thermal glider that I have. Anything can fly ... even bumble bees right.
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Old 07-17-2006 | 04:08 PM
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Default RE: Will THis Work

Nitro

Have you seen the movie Stealth? A design based on the Northrop Grumman Switchblade the FA-37 Talon was fabricated. Cool stuff. Or the X-29 I have the drawing on my site for X-29 this might help, it is similar to yours.

I have some other Ideas that might tweak your fancy.


http://betterfly.ca/BetterFly/RC_concepts.htm

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