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Classic Designs => Classic Planes => Topic started by: Tom Niebuhr on June 16, 2007, 09:42:34 AM
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Here is another Sheeks Classic Era airplane.
The "Freedom 45" is a beautiful airplane. It appeared in Flying Models, May 1968. FM plan is CF121.
This one can have either a Foam wing, or a "C" tube wing.
We would love to see one at VSC 2008!
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One of my favorites.
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thats pretty cool, looks very "t-38" or F-5 ish
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Randy,
This gives you another one to think about building!
In a day or so I'll put another Sheeks Classic airplane on the forum.
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Tom,
I think this one of the only ones I don't have plans for. Orginally designed for an Enya 45, be cool with the Magnum 53 I have sitting in the drawer. Hmm....
I had thought about building a Bernie Ash Supersonic Stunter for that engine, but now I'm thinking maybe the Freedom 45.
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how big is it?
span and squares
Dave jr.
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Dave,
60" span. I think around 650 squares.
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Hi randy
i just printed out the plan that was attached and scaled it out.
i got 58" span and about 650 squares just slightly bigger than a cobra
if you figure the C/G at 20% the leadouts might need to come out the front of the leading edge to be anywhere near the modern definition of optimum!
any thoughts ?
any one familiar with sheeks other swept back wings and where the leadouts ended up?
might just as well forget the adjustable leadouts and shove them all the way forward i guess
Dave jr.
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The FM plans directory says the Freedom 45 is 60". The plans #CF121 are still available from FM. I hope they are more accurate than the Sea Vixen that I have started. (Thank God that Jack is only a phone call away.)
The best thing to do for the leadout position is to calculate the CG at approx 18% (25% max) of the Mean Aerodynamic Chord. (Easiest method to approximate the MAC is to draw an "X" : LE tip to TE of flap at fuselage; LE at fuselage to TE of flap at tip. This will locate the MAC. The 18% of the chord location will be the starting GG location) I have calculated all this and the "X" method is amazingly close to the calculations. This is always a starting point anyway.
Look at Don Hutchinchin's F86 that was in August '03 Model Aviation ...he used a stinger in front of the wing with the forward leadout adjustable. It has worked well. I will use the same setup in my Sea Vixen.
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The plans show the leadout exit at the wing tip. Wonder how it flies if built as drawn?
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Probably flies well. Jack told me that he never published an airplane that didn't fly well.
I think that Jack would be glad to answer any questions on the leadouts, or particulars of the design. He will give unbiased , sound advice, on any chages that might be needed. His Tel number is in the PAMPA directory.
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I built mine per the plans. I used a Foam wing and frankly it is a porker. Despite that, the plane started out with a ST 46 which had plenty of power, but I was not able to carry enough fuel. It went on the wall and then I got an LA 46 which was able to fly it equally as well and I had more fuel economy. The plane seems to require about 1 1/2 ounces of tailweight. Now remember, mine was and is a porker. Don't ask me what it weighs as I built in in 1993. I had Jack sign it for me and it is a prized possession and if it hangs on the wall the duration of my life that will be fine for me. It is a cool looking airplane. I hope to post a picture here in the near future. Mine seemed to have a strange wiggle to it. Meaning that when it came out of a hard corner, the tail would wiggle in and out of the circle. Maybe that was due to the leadout/bellcrank location, I don't know for sure. I built it without adjustable controls, exactly like the plans. I would like to hear more about what Ed Ruane was saying about the setup he would use with the Sea Vixon.