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Does anyone know what this is ?

Old 11-05-2007, 11:42 AM
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Default Does anyone know what this is ?

Hello everyone:

I was given this plane and have no clue what it is, where the CG is, what the elevator needs to do to make it go up and down, in other words, everthing about it.

Thank You
Desertrider49
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Old 11-05-2007, 12:35 PM
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Default RE: Does anyone know what this is ?

I have never seen one of those before, but I can answer your other questions. The elevator on a canard goes up to make the front of the airplane go down and it goes down to make the front of the airplane go up. It is backward from the conventional tail mounted elevator.

Go here to figure the CG. http://sky.prohosting.com/air2/cg_canard.htm

Jim
Old 11-05-2007, 12:44 PM
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Default RE: Does anyone know what this is ?

Thanks JRF, every little bit helps.

Desertrider49
Old 11-05-2007, 01:20 PM
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Default RE: Does anyone know what this is ?

Just posting so I can follow along.

Hoping someone can identify the plane.

Thank you,
Old 11-05-2007, 01:30 PM
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Default RE: Does anyone know what this is ?

My brain wants to say RCM plans.. mid-late 80's...
Old 11-05-2007, 01:38 PM
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Default RE: Does anyone know what this is ?

Send a PM to RCU user Ed_Moorman. He and Flaps Lafferty love canards and can likely help you set this one up.
Old 11-05-2007, 02:00 PM
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Default RE: Does anyone know what this is ?

Found it!!! AMA Model Aviation August 89

The Sweepee AMA Plans #00626
Sport Pattern Canard .40



I knew I'd seen it before..

Thanks go to the AMA Digital Archives search engine.
Old 11-05-2007, 02:08 PM
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Default RE: Does anyone know what this is ?

sscherin, you are the man.

I and all who will watch this plane fly will be indebted to you.

Thanks
Desertrider49
Old 11-05-2007, 03:46 PM
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Default RE: Does anyone know what this is ?

The article says the CG is 5 3/4" forward of the LE

I couldn't find any recommended throws other than 30deg on the ailerons each way.

Elevator runs backwards of normal.. Up makes the nose go down..

If you have access to the AMA digital archive it's worth reading.
It's 15 pages and gets into some of the odd flight characteristics.

http://www.modelaircraft.org/Members...hive/index.asp

It's interesting.. He mentions the same Don Sobbe article I remember reading (maybe where I got RCM stuck in my head) from around 1987-88
I spent a bit of time that summer designing and building Canard FSW free flight gliders and a Canard FSW slope glider that I never got around to finishing.

I'm thinking I'll be adding the Sweepee to my list of planes to build.

One thing I do remember is these things have weird stall characteristics.
Because the CG is just about in the center when it stalls it falls flat.. No pich up or down.. Just flat until it gains enough forward speed to fly.
Old 11-05-2007, 04:59 PM
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Default RE: Does anyone know what this is ?

The canard needs to be 3 degrees positive incidence compared to the wing. You never, never want the wing to stall before the canard. This would be a disaster, a tail first drop.

Normally, on a pusher canard, there isn't much airflow over the canard tail, so you need a lot of travel. With this plane in the tractor configuration, you can blow the canard and nose off the ground with prop blast before the wing has flying speed. I did this on our first tractor canard. The plane flips like a 3D plane, then crashes. Plan on a long take off run and be gentle on the up control until you know the characteristics of the plane.
Old 11-05-2007, 05:05 PM
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Default RE: Does anyone know what this is ?

You Sir, are a like saver. If you are interested, it may fly this coming weekend. If so, i'll post a video on my clubs website.
WWW.trabucorcflyers.com Also, if you ever make it to southern California you must stop by the club for a flight.

Thanks Again
Randy
Old 11-14-2007, 02:23 AM
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Default RE: Does anyone know what this is ?

Hope to see it fly soon. Or at least read that all went well.
John

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