khodges
Posts: 5063
Joined: 7/3/2003
From: newton,
NC, USA
Status: offline
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Thanks, Chic. I am also planning to hide the flap linkage. I've been studying the angles involved to figure on how much leverage I'll lose, but with a 132 oz./in. servo operating each flap, I don't think it will matter. Roy's plans state for 45 degrees full deployment, but I'm going for the scale 60 degrees.
While we're on this kind of subject, what servos did you use for all your surfaces? I've always been a Futaba man, so I'm sticking with them for this plane as well. This is what I'm looking at:
Rudder, elevator and flaps---S9206. Std size, 2 ball bearings, coreless motor and metal gears, 132 oz./in. torque, 4.8V only
Ailerons---S9402. Std size, 2 ball bearings, coreless motor, metal gears, 89 oz./in. at 4.8V
Throttle--S3001 precision. good basic servo, plenty for a gas throttle.
Too much, too little? I certainly would rather go the overkill route than not enough. I really don't feel a need for digitals, this isn't a high performance plane and don't need the speed or holding power.
Oh, and the CD will go out in tomorrow's mail back to you, and I am including templates for #5 and #6 formers. I made a few notes on them and since you've already built one, you will see what other mods have to be made to the airfoiled root piece that glues inside the cabin. It will have to be notched at #4 to allow it to make the angle possible, and the cabin sides will also require a relief "kerf cut" along the same line, just down to the line of the kerf cut called for by the plans. What happens here is the top of the cabin just above the rear side window should make a more gradual curve, but the root area must make a sudden angle. I can see it in my mind, especially after looking at several of the shots on that CD, and I will post pictures and a detailed explanation when I get to that point.
< Message edited by khodges -- 1/20/2008 5:29:49 PM >
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Club Saito #2, WACO Brotherhood #20. What other trouble can I get into?
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All Forums >> RC Airplanes >> RC Warbirds and Warplanes >> RE: 25% Cessna L-19/0-1 Bird Dog build 
RE: 25% Cessna L-19/0-1 Bird Dog build - 
. But nice of you to think so. 
I also connected my elevators with a dowel and as you see in the pictures on page 1 of this thread, I also cut in an elevator tab with the tab placed on the bottom of the elevator side. Your changes are right on even though it is too late for me to incorporate several of those changes. The cigar tubes worked great, I went through several tubes to get the right airfoil shape cut into them. I gave the cigars to my flying friends. I used a balsa plug and wheel collars to mount the FM antennas. They will be removable for travel. Trying to find a quote "rod" that is also flexible instead of mounting copper tubing which I displayed in my pictures of my bird. Keep up the great work, your diligence will result in a great looking model. Note: the 
To be truthful, at the time I was selecting servos, I was replacing all the windows in the house and did not have alot of extra money 
so I opted for mostly Hitec servos, they were an online bargain that I could not pass up. For the ailerons, I have 625MG's installed, for the flaps, I have 645MG's installed, for the rudder and elevators, I have 755's installed, for the payload drops (duffle bags with parachutes) I had several Ace 8107's needing employment, and finally for the throttle, as a JR man, I had to install at least one JR servo and I went with the DS821. My transmitter is the JR 10X with the Spectrum module. I'll run a heavy duty switch and two