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Author Topic: Death of a Canard  (Read 1386 times)

Offline john vlna

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Death of a Canard
« on: May 03, 2011, 10:10:50 AM »
Death of a canard.
I started project this sometime ago, lost interest but came back and finished it this spring. Power is a Baby Bee with the large tank. I had the engine on a SIG Skyray and it always has run well.  Construction is all sheet balsa, wingspan is 26” with an inch of forward sweep. Wing area is about 100 sq. in. There isn’t any gear.

Of course I hooked the controls up backwards on the maiden flight. Oddly I had them correct, but my helper and I talked ourselves into changing the connections. I touched up on launch and it went straight down. There was not much damage and it was soon in the air. The funny blue marks on the elevator/stab are field repairs for a broken hinge. It flies very well. Quite fast and maneuverable. I used an online calculator to determine the balance point and it was perfect.

The down side is that on the second day of flying I re-kitted the model. I think it was pilot error. I was inverted and did a wingover to get upright. I lost it and well instant kit. It is repairable, but I think a new one with a built up wing would be a good idea. The design  seems OK. 

Offline Eddie Culver

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Re: Death of a Canard
« Reply #1 on: May 03, 2011, 04:54:55 PM »
Congrats on the successful part of the flight sorry about the rekitting part.  I have rekitted too many canards myself no to feel your pain.

You said you used an online calulator.. I would love to know the link for that tool.  I have been calculating mine by hand (yes I still count on my fingers) and the only tool I have found online is directed mostly at RC and gives no consideration for lead-out lines.

Thanks for any info - Eddie

Offline Tim Wescott

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Re: Death of a Canard
« Reply #2 on: May 03, 2011, 05:07:41 PM »
I would think that the answer that Line III coughs up would be perfectly on track -- it gives inches behind the CG, and should be agnostic to the way that the CG was arrived at.
AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Offline john vlna

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Re: Death of a Canard
« Reply #3 on: May 03, 2011, 06:13:20 PM »
Eddie,
This is the calculator I used
 http://adamone.rchomepage.com/cg_canard.htm
Your right all of them are for RC, but I simply mount the BC behind the CG and bring out the leadouts slightly aft of the CG, just as I would for a conventional design. Seems to work.part of the reason I crashed is that the leadouts could have been a bit farther back. It was light on the lines, and my older reflexes didn't keep up.

john

Offline Eddie Culver

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Re: Death of a Canard
« Reply #4 on: May 04, 2011, 02:06:33 PM »
Thanks for the link - I will check it out and see how (or if) my numbers add up.

I am currently building my 5th design again since it was a great flier.  Hope to get out with it this summer.

Later - Eddie

Offline john vlna

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Re: Death of a Canard
« Reply #5 on: May 05, 2011, 06:50:55 PM »
Eddie,
Good luck. I liked my short lived model well enough to build a new one, maybe later this year.
John

Offline john e. holliday

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Re: Death of a Canard
« Reply #6 on: May 06, 2011, 08:48:16 AM »
I like it.   Do you have a drawing of it? H^^
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530  Have fun as I have and I am still breaking a record.

Offline john vlna

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Re: Death of a Canard
« Reply #7 on: May 06, 2011, 10:39:39 AM »
 Doc

No plans but I plan to make some since I really liked the plane. I'll keep you in mind when I get to it.

Offline john vlna

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Re: Death of a Canard
« Reply #8 on: May 12, 2011, 07:43:31 PM »
Rising like a Phoenix, the Canard is almost ready to fly. Most of the really bad damage was to the elevator. Since I never named this creation I have decided to call the Phoenix. I had to put it back together since I never actually drew a plan. Despite the two crashes, It flies so well I wanted to capture the design for future use, and besides, Doc wanted a copy. (It is coming Doc, but I have a contest this weekend so it is delayed)

Offline john e. holliday

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Re: Death of a Canard
« Reply #9 on: May 13, 2011, 08:56:54 AM »
I guess a contest is as good as an excuse as any. LL~ LL~ Remember I have lots of patience,  like it should have been here last month. VD~
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530  Have fun as I have and I am still breaking a record.

Offline john vlna

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Re: Death of a Canard
« Reply #10 on: May 13, 2011, 10:21:51 AM »
Doc,
I crashed twice this month does that count?
John

Offline john e. holliday

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Re: Death of a Canard
« Reply #11 on: May 14, 2011, 09:23:01 AM »
Okay. D>K
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530  Have fun as I have and I am still breaking a record.


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