HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Jan 09, 2007, 11:06 PM
Bernoulli+Newton=Lift
magic612's Avatar
Somewhere south of Chicago, IL
Joined Jan 2006
1,952 Posts
Xanard "chuck glider"

Quote:
Originally Posted by canard addict
Magic: That Geomefly really looks interesting, like a reverse canard. I suppose it flys with the green wing forward? Where will the motor go? I look forward for more and more of your ideas. I'll bet that you and Inspector Gadget could make modeling history!! It would be nice to meet you at SEFF. Charles
Charles, here's that version I described earlier - X-style support bracing between the low-canard and the high-wing. The spot in the middle of the "X" is a dime for a bit of mass - it didn't really need weight up-front, because the CG is about where the dime is, but the mass helped to keep it moving in glide tests.

It's hard to get the sucker to stall!! It just slows down, and sort of "settles down" slowly, rocking back and forth a bit. It may need a vertical stabilizer, which if one was put straight up the middle from the center of the "X" to the high wing, would provide some nice additional support for the main wing.

I'm excited about making a larger version of this for the coming weekend.

Oh, vital stats on the glider: I'm calling it the Xanard. 2mm Depron foam and epoxy construction, 14 grams AUW (including the dime), 15" wingspan main wing, canard span is 12.5" inches, and length is about 13". I did bend in a slight airfoil into the upper wing, but none into the canard. And, there's no incidence in the wing or the canard - both are set at 0 degrees, so there's certainly possibilities it could fly much better with a little of each. However, it glides in such a way right now that I'm thinking it may actually fly better with the extra radio / battery / motor weight ON it, as opposed to being a light glider.

I'll post more details as I progress. Hope you like!
magic612 is offline Find More Posts by magic612
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 10, 2007, 01:12 AM
INDORUS EXPARAMINTO
SPEED-E-FLYER's Avatar
Springfield, Missouri, United States
Joined Jul 2002
4,206 Posts
Quote:
Originally Posted by falcompsx
what is the purpose of the canard design? They look kinda cool, but is there any functional purpose to them over a traditional design or is it mostly just to be different / unique? Either way some nice planes here!
One of the benefit of the forward wing is during high angle of attack the front wing(canard) will loss its lift and stall before the aft wing. When that happens it will drop and keep the back wing from stalling and loosing all lift.

Hope this makes sense, will look for some moreinfomation for you, maybe some pictures too.

Larry

PS Got to love that name "Xanard" sounds like some type of pig latin
SPEED-E-FLYER is offline Find More Posts by SPEED-E-FLYER
Reply With Quote
Old Jan 10, 2007, 05:51 AM
Registered User
Airboatflyingshp's Avatar
B'ham UK
Joined Oct 2005
2,990 Posts
Quote:
Originally Posted by falcompsx
what is the purpose of the canard design? They look kinda cool, but is there any functional purpose to them over a traditional design or is it mostly just to be different / unique? Either way some nice planes here!
Traditionally Canards are virtually stall proof ............this was a life saving feature in early aircraft with low power...
There are several downloadable free Canard CAD designs out there one is based on the WW2 Ascender Fighter others are based on the work of the Miles Aircraft company.
Airboatflyingshp is offline Find More Posts by Airboatflyingshp
Reply With Quote
Old Jan 10, 2007, 09:31 AM
Bernoulli+Newton=Lift
magic612's Avatar
Somewhere south of Chicago, IL
Joined Jan 2006
1,952 Posts
Quote:
Originally Posted by SPFD-E-FLYER
PS Got to love that name "Xanard" sounds like some type of pig latin
Just a mash up between "X" and "canard".
magic612 is offline Find More Posts by magic612
Reply With Quote
Old Jan 10, 2007, 12:06 PM
Registered User
Airboatflyingshp's Avatar
B'ham UK
Joined Oct 2005
2,990 Posts
Try this vintage link http://home.att.net/~mybeasts/Europe.htm
and http://home.att.net/~dannysoar2/Homepage2.htm

one of several at The Plans page http://www.theplanpage.com/Months/2504/indoorcanard.htm

Going back to Traplet I found more Canards Flyback Canis a lage delta by David lovegrove, Quickfire by peter Boulton and another I have plans for Treki by brian young....They also do Paul Janssens PSS of the XB70 Valkrie. I think they also did Preadator a forward swept wing Canard.

Nexus do Irregon and Dranac and Flexwing Canard by W Brooks.
Airboatflyingshp is offline Find More Posts by Airboatflyingshp
Last edited by Airboatflyingshp; Jan 10, 2007 at 12:55 PM.
Reply With Quote
Old Jan 10, 2007, 03:26 PM
Registered User
United States, CA, Chino
Joined May 2006
125 Posts
so...a canard design means the main wing is to the very front of the airplane? or the horizontal stabalizer is at the front? I've seen some of the planes here, and it seems that they can be made either way...
falcompsx is offline Find More Posts by falcompsx
Reply With Quote
Old Jan 10, 2007, 04:22 PM
Registered User
Airboatflyingshp's Avatar
B'ham UK
Joined Oct 2005
2,990 Posts
Canard is from the French ..for Duck in silhouette a log neck sticking out in front of the body and wings.
On an Aircraft it puts horizontal fins out in front they may be fixed , have Elevators or be whole moving surfaces.
Canards are particularly well suited to pusher layouts..the worlds largest, fastest most expensive Xplane/bomber was a canard ..The XB70 Valkrie. http://www.labiker.org/xb70.html http://www1.dfrc.nasa.gov/Gallery/Ph...-70/index.html
TID=P2A5BT43ABBR228667509&PS=1&PID=3200995&showcat =1&sparte=

VTH plan link scour the rest of this site for many Ducks http://www.vth.de/shop/shopfiles/product.asp?

Ducted Fan model http://homepage.mac.com/dbbond/XB-70/PhotoAlbum62.html
Big thread http://www.rcuniverse.com/forum/m_26...alkarie/tm.htm

For early very early aircraft examples G search for Santos Dumont.

Burt Rutan for modern http://www1.dfrc.nasa.gov/Gallery/Ph...eus/index.html
Airboatflyingshp is offline Find More Posts by Airboatflyingshp
Last edited by Airboatflyingshp; Jan 11, 2007 at 09:09 AM.
Reply With Quote
Old Jan 10, 2007, 04:51 PM
Visitor from Reality
United States, VA, Arlington
Joined Dec 1996
12,788 Posts
Quote:
Originally Posted by magic612
Unless of course, one has access to a (undoubtedly very expensive) computer program that will "fly" the plane "in" one's computer first.

And for the rest of us, there are always "chuck gliders"....
I had high hopes that one or t'other of the RC flight sims would come out with a design mode of some sort - if only a generic wire frame where you could input the design basics.

Obviously, there's no money in that, and plenty in using a flight sim to peddle kits...

Anyway, slinging a chucky around in the street is more fun than diddling with computers - though the neighbours may wonder more at the former...

D
Dereck is offline Find More Posts by Dereck
Reply With Quote
Old Jan 10, 2007, 05:26 PM
Registered User
Airboatflyingshp's Avatar
B'ham UK
Joined Oct 2005
2,990 Posts
Quote:
Originally Posted by Dereck
Anyway, slinging a chucky around in the street is more fun than diddling with computers - though the neighbours may wonder more at the former...

D
Well said Sir ...........and I have been known to teach Science..if it don't break sometimes and it doesn't hurt you don't learn, and you certainly do not learn sticking power!
Airboatflyingshp is offline Find More Posts by Airboatflyingshp
Reply With Quote
Old Jan 10, 2007, 06:13 PM
Registered User
Joined Jun 2005
2,473 Posts
Airboat: Thank you for all the great canard links. I especially enjoyed the Pelican boat and the Borgo which has the wing shapes of my newest design.The canard wing will be swept back both LE and TE and the main wing will have Swept back LE and straight TE. My stable has equal quantities of canards and conventional planes but the canards are gaining. I enjoy flying both types but the canards are fascinating because each wing has a flying job to do and usually they do it very well. There is a different feel and I love it. To me, they are very stable and they do not look like they would be.I also found that the approach and landings are much more controlled.I will try to show some pictures of the canards of one of our club members. Charles
canard addict is offline Find More Posts by canard addict
Reply With Quote
Old Jan 10, 2007, 07:02 PM
Registered User
Airboatflyingshp's Avatar
B'ham UK
Joined Oct 2005
2,990 Posts
Canard adict do you mind me putting up some 3 views of real canards here as inspiration and some more links?
Have you ever come across the inter Ex site for unusual designs or seen the Microlights/homebuilt canards both land and waterplanes at Vula search it all its worth it ?? http://vulatalk.zdwebhosting.com/pictures.htm http://vulatalk.zdwebhosting.com/pic.../page0027.html
regards Clive

http://inter-ex.com/english/iexoverview1.htm multi lingual site off homepage top button....

My resources thread can be found here by the way http://www.rcgroups.com/forums/showt...t=448080&pp=15
Airboatflyingshp is offline Find More Posts by Airboatflyingshp
Last edited by Airboatflyingshp; Jan 11, 2007 at 11:39 AM.
Reply With Quote
Old Jan 10, 2007, 07:17 PM
Registered User
Vrated's Avatar
United States, UT, Marysvale
Joined Aug 2004
1,113 Posts
Diddle FW-42 Canard Twin

Hi All, I just found this thread, It was great to read about all your experiences. Last year I decided to build a Scratch/Design Diddle scale model of the FW-42. I never built or flown a Canard or a twin so I gave it a try. It was a very enjoyable project. The Model is all balsa, covered with tissue and painted with 50/50 thinned clear dope. I also tried printing the markings on tissue for the first time and worked well. The FW-42 is powered by (2) LPS B2C motors (6.2:1 gearing) using 6050 props, and TP 2- 480 mAh Lipo. The AUW is at 4-3/4 Ounces, Rudder / Canard, ESC. The plane turns out to be very easy to fly, stays up for about 5 minutes. at first the rudder turned out to be very sensitive, so I reduced the rudder thrown down 1/8" travel ( Right & Left). Then she flew great. I also found out that you want to land before running out of power, the canard on this plane takes quite a beating on deadstick landings . I would like to do a more scale built-up wing version with landing gear someday .
Vrated is offline Find More Posts by Vrated
Last edited by Vrated; Jan 10, 2007 at 07:25 PM.
Reply With Quote
Old Jan 10, 2007, 07:52 PM
Registered User
Airboatflyingshp's Avatar
B'ham UK
Joined Oct 2005
2,990 Posts
Someone is reportedly building a model of this for six geared S400 power http://freespace.virgin.net/john.dell/Aart.htm
Airboatflyingshp is offline Find More Posts by Airboatflyingshp
Last edited by Airboatflyingshp; Jan 10, 2007 at 08:26 PM.
Reply With Quote
Old Jan 10, 2007, 08:16 PM
↓↘→ + (punch)
theKM's Avatar
central PA.
Joined Sep 2004
20,223 Posts
Quote:
Originally Posted by Airboatflyingshp
Canard adict do you mind me putting up some 3 views of real canards here as inspiration and some more links?
Have you ever come across the inter Ex site for unusual designs or seen the Microlights/homebuilt canards both land and waterplanes at Vula?? http://vulatalk.zdwebhosting.com/pictures.htm
regards Clive
My resources thread can be found here by the way http://www.rcgroups.com/forums/showt...t=448080&pp=15
Fly boats! they rock! ...thanks for sharing, and giving me yet another plane to build
theKM is offline Find More Posts by theKM
Reply With Quote
Old Jan 10, 2007, 08:28 PM
Registered User
Joined Jun 2005
2,473 Posts
Airboat: To me , this is a fun thead and I would welcome any canard pictures and three view shots. Maybe someone like Vrated will get inspired to bring something different to our meets. Vrated, that is a beautiful piece of work!! Like a conventional model, the horizontal stabilizer works better if enlarged. If your canard wing is less tha 30% of the main wing area, it may have trouble holding the nose up with authority. I have enlarged more than one canard wing above 30% with good results. A strip of wood added to the front of your canard wing may help with slow landings. A little extra speed or a shift to the rear of the CG may also help.I had a sluggish canard on my Shinden which had a 20% canard area. By doing all three fixes,as above, it is now is a super performer.Actually, with an extra cell, I had to move the CG a bit forward. Charles
canard addict is offline Find More Posts by canard addict
Reply With Quote
Reply


Thread Tools