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Old Jul 21, 2012, 12:31 PM
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Edwen, Your B-2 seemed to have adequate power. You could be first with an original EDF canard. I did more net searching but could not create enough spark to jump into it. The Captain Johnny may have the best arrangement with his sailplane.

Charles
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Old Jul 21, 2012, 01:17 PM
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Duck Twin test flight

A great day to fly happened last week with moderate temp. low wind and a blue sky. The large amount of vertical fin area kept it straight into the wind on take off. Two clicks of DOWN elevator trim gave near level flight past mid throttle and that setting was held throughout the flight. When testing for canard stall with full UP elevator at low cruise speed, it responded with repeated oscillating canard stalls. With reduced power and full UP elevator it went into a nose high mush position which I had hoped for to make a three point landing easy. With about 3/4 throttle, it did a large round loop which drew applause from one in the crowd. The next test was a steep banking turn at cruise speed which it did without any tendency to drop the nose. I give the credit to the 50% canard and the large side fuselage area up front. I briefly tried rudder at level flight and at knife edge position but found it was overly sensitive at zero exponential. The base turn was pretty at lowest throttle and the landing touch down was an easy three points. The all white side view will have to be changed and today I am building red wing fins for it.

Charles
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Old Jul 21, 2012, 04:53 PM
What could possibly go wrong?
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Well done Charles! Great stuff!

Nick
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Old Jul 21, 2012, 09:26 PM
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Congrats Charles, with such a nice build and flight report!

My Shinden stalled briefly, falling flatly with a little wobble, easy recovered with power up.

Maybe there is not much effort for EDF on conventional airframe, but seems a few French jet fighters have canard with delta wing. Some of them are now available as RC EDF. Yes put EDF on Shinden, not even the Japanese were able to complete it , would be cool.

Love the canard now, really inspired by you and other canard lovers, will soon try some crazy silly ideas
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Old Jul 22, 2012, 12:49 AM
What could possibly go wrong?
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How about one of these? Miles Libellula


or these:
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Old Jul 23, 2012, 02:24 AM
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Today flew my Shinden again and some of the bystanders commented, "The (main) wing is in the wrong place..."."That is the whole point", I laughed. Man I love the eccentric look of canard planes.
Plus the agility and stability of Shinden is just amazing. I have Parkzone T-28 Trojan for almost three years, this Shinden's agility is just no less than the Trojan, despite its lack of propwash to help the maneuverability. Or maybe just because of my luck when building her, despite my lack of experience.
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Old Jul 23, 2012, 06:23 AM
TonyS
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Congratulations, Charles!

TonyS
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Old Jul 23, 2012, 07:07 AM
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Thanks Nick, edwen and Tony. We find all types of modelers out there with lots of different interests and I have no problem with them and enjoy finding out what their motives are..

edwen
Quote:
Today flew my Shinden again and some of the bystanders commented, "The (main) wing is in the wrong place..."."That is the whole point", I laughed. Man I love the eccentric look of canard planes.
Plus the agility and stability of Shinden is just amazing. I have Parkzone T-28 Trojan for almost three years, this Shinden's agility is just no less than the Trojan, despite its lack of propwash to help the maneuverability. Or maybe just because of my luck when building her, despite my lack of experience.
I hear this all the time, edwen and thoroughly enjoy showing off my canards. The T-28 is probably the sweetest handling conventional model I have ever owned but to me there is more after that to be experienced and canards have captured my interest for the most part of a decade. Creating a two wing model with control up front which protects the main wing from stalling is a great experience. I am happy for each of you and others who can find joy in canard modeling.

Charles
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Old Jul 23, 2012, 08:49 AM
Visitor from Reality
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Joined Dec 1996
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Congratulations on your succesful 'maiden' Charles. She's a good looking model and a good flier too - if all you have to is twiddle a few clevices and paint the wingtip fins red, you've done great.

Dereck
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Old Jul 23, 2012, 02:21 PM
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Thanks Dereck. The white main wing fins seem to block the red of the wing and show a large glob of white with the rear stabilizer rudder which ruins the definition when there are clouds in the background. I am just building two new fins to be covered in red and swap out using the three existing screws.

The designer of the Miles Libellula must have been highly knowledgeable to hurriedly design what I see as a great accomplishment. From what I have read in Lennon's book, it tested well. Are there any still flying in the UK?

Charles
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Old Jul 23, 2012, 08:38 PM
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Charles
The full size Miles canards did not survive as far as I know. Don't recall reading anything on how wondrous any of them were.

I met Doug McHard, designer of the rubber powered Libellula, on many occasions. He was one of the finest aeromodellers ever, who specialised in modeling the 'most interesting' aircraft going. Asked him about the Miles model once - he was a little vague on how it went.

Which could be taken as a challenge...

D
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Old Jul 24, 2012, 07:02 PM
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Canard layout is just so popular, like in this glider bashing thread where I have been pretty active:
http://www.rcgroups.com/forums/thumb...=threadgallery
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Old Jul 26, 2012, 05:16 PM
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edwen303
Quote:
My Shinden stalled briefly, falling flatly with a little wobble, easy recovered with power up.
I feel that your Shinden's wings were both into near stall or what I call a mush condition. This may have been due to an under sized canard for a model and a CG point back into the main wing. That was the case with my Hobby Lobby International foam Shinden. At low speed the model would assume a nose up mushing position and slowly land itself. I found that a model plane needs a larger than scale horizontal stabilizer to give adequate lift at low speeds because the Reynolds number gets too low with a small chord. My Shinden was slow and light weight and the small canard was sluggish so an extra cell and more area was added to the canard which moved the CG forward. The discussion of my Shinden can be found in this thread and I hope it agrees with my recollection. It was passed on to Happymcc who may still be flying it.

The Duck Twin received red tip fins today to improve it's visibility.

Charles
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Old Jul 26, 2012, 06:08 PM
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Here is the more visible Duck Twin.
Charles
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Old Jul 26, 2012, 06:33 PM
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Sydney, Australia
Joined Mar 2006
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Charles, The duck Twin is a great looking model. The red winglets look better too me.

What are your thoughts on the weight distribution? Have you noticed any benefit of having the engines and battery located close to the COG?
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