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Canard Foil

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borist
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Re: Canard Foil

Postby borist » Fri Mar 17, 2017 1:51 am

I agree with that. If wings are flat, G10 would be reasonable for weight/stiffness/cost formula

BWD
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Re: Canard Foil

Postby BWD » Fri Mar 17, 2017 1:54 am

A good option might be carbon strut with g10 wings, is this a thing with any models out or a diy project?
It would make sense to start with al/g10 and a shorter strut/mast and upgrade to longer cf strut &/or wings as desired -- if anyone had the sense to develop the components to work together.

ronnie
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Re: Canard Foil

Postby ronnie » Wed Apr 12, 2017 12:29 pm


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Starsky
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Re: Canard Foil

Postby Starsky » Wed Apr 12, 2017 2:37 pm

Yo, that is outside the box by building a box!

Call it the Northfire.

Easily changed to misfire if it doesn't work!

juandesooka
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Re: Canard Foil

Postby juandesooka » Sun May 14, 2017 5:00 am

First experience with my diy canard wings. I copied the spitfire shape out of g10 but scaled up 20% on rear wing and 10% front wing.

Not really an ideal testing day...just barely enough to make 17m go then wind increased to over powered. But had to try.

First impressions...

-- harder than I thought to adapt. Going to take a few sessions I reckon

-- oddly I got toeside immediately but regular heelside more challenging....will have to analyze that.

-- definitely needs more speed....even with the scaled up wing size

-- didn't get to full carving but the few turns done were SUPER fast. I see the benefit!

-- smaller wing size has noticeably less resistance in the water.

More experiments soon.

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DrLightWind
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Re: Canard Foil

Postby DrLightWind » Mon May 15, 2017 1:20 pm

juandesooka wrote:
Sun May 14, 2017 5:00 am
First experience with my diy canard wings. I copied the spitfire shape out of g10 but scaled up 20% on rear wing and 10% front wing.
Great. :thumb:
Would be nice if you could post a picture of it. :idea:

DrLW

juandesooka
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Re: Canard Foil

Postby juandesooka » Mon May 15, 2017 3:47 pm

20170512_123755_resized-1.jpg
Couple photos. Based off stringy fuselage. I might try experimenting with removing the spacer on front wing. Though maybe that provides some yaw control? Dunno....going to take a little monkeying around....or need to get used to it. Harder than I thought it would be!
Attachments
20170512_123618.jpg

BWD
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Re: Canard Foil

Postby BWD » Mon May 15, 2017 5:17 pm

Thanks for sharing that picture, looks cool!

I suspect one of the things that took some tinkering for zeeko to figure out on the spitfire was the size ratio of front and rear wings. If yours is extra rear biased and twitchy you might try a front wing a little bigger to stay close to the ratio of the spitfire wings, which seems to work well. Fuselage length may also be something to tune, maybe longer could be tried, if you stick with your small front wing?

juandesooka
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Re: Canard Foil

Postby juandesooka » Mon May 15, 2017 5:49 pm

BWD wrote:
Mon May 15, 2017 5:17 pm
Thanks for sharing that picture, looks cool!

I suspect one of the things that took some tinkering for zeeko to figure out on the spitfire was the size ratio of front and rear wings. If yours is extra rear biased and twitchy you might try a front wing a little bigger to stay close to the ratio of the spitfire wings, which seems to work well. Fuselage length may also be something to tune, maybe longer could be tried, if you stick with your small front wing?
Twitchy.....that's indeed how I'd describe it. I found I'd get up on foil, then quickly drop, over and over ... kinda like going back to the bucking bronco of the beginner days. BUT, weird thing is, toeside was smooth as, no problem. I actually think maybe on heelside I was trying to over compensate for being overpowered by trying to go too slow, whereas the toeside was more properly powered (with the 20% or so loss of efficiency from toeside bringing it into comfortable range). I found when I gunned it a little more heelside, it flew better. All in all, I'm not going to do anything until I get a proper testing day! I had intended to save the first use for one of those perfect easy days, but just couldn't resist! :lol:

Good advice though about getting the scaling even. If I can't get it working properly after a few sessions or it doesn't feel stable enough, I may do that, as I have one more piece of g10 left over. Alternatively, I could just use my stringy small wing "upside down", as it looks about right size too. Fun to play around.

jespin4845
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Re: Canard Foil

Postby jespin4845 » Mon May 15, 2017 6:22 pm

dude careful with all that g10 dust in your garage, that stuff will take years off your life


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