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WACO YMF

Old 10-20-2007, 12:50 PM
  #4051
aminiet
 
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Default RE: WACO YMF

SuperCub Man.

Thank you for the wing side view drawing, it answered my question regarding the angle cut on the aileron, and Stickbuilder answered the question about the link installation to move the aileron up/down. Thank you both.
Bill, I would also like to see the drawing. The picture is on pg. 79
post 1571

Angel
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Old 10-20-2007, 12:55 PM
  #4052
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Default RE: WACO YMF


Quote:
ORIGINAL: raston

Hi there all...
I am really interested in building this plane. Iv'e got an engine I want to build around, and I'm looking for a winter project. Does anybody know of kits available, or are there any kit cutters that are doing this plane (ie: the PICA 1/5th scale)

Thanks!
There are a few still out there, and from time to time you can find one on the big selling site. Or you can contact the AMA, and order the plan set, and with it, you will get the parts templates, download the manual from the site mentioned here, and cut your own kit.

Bill, AMA 4720
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Old 10-20-2007, 01:18 PM
  #4053
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Default RE: WACO YMF

Raston,

I agree with Bill, order the plans from the AMA, down load the manual(s), spend a little time with your jig saw and you will then have a custom cut kit produced by you.

The kit on eBay (item #130164323425) is currently at $385 (plus $25 shipping) and bidding closes tomorrow the 21st. To much for my wallet. Cut your own and save the money for covering and other items.

I am not aware of any kit cutters doing the Pica Waco YMF. The House of Moy site http://www.houseofmoy.com/waco/ suppliments this thread and has a list of Waco plans, kits and other info. Check the list to see.
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Old 10-20-2007, 01:22 PM
  #4054
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Default RE: WACO YMF

It's kind of crude, but here it is.
the second one is going to be a little more helpful.
Bill, AMA 4720
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Old 10-20-2007, 02:18 PM
  #4055
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Default RE: WACO YMF

Thank you Bill, That should work.

Angel
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Old 10-20-2007, 02:19 PM
  #4056
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Default RE: WACO YMF

Bill and the rest,

Here are some aileron linkage shots from the full size Wacos. The “kinked” connecting rod is common as seen in P2 as is the straight rod in P1; it depends on each plane what style to use. All three aircraft are UBF-2s in the pictures.

P1 Shot with the cover removed, brown tube at the top is the push rod to the cockpit (UBF-2 NC 12002)
P2 Cover on (UBF-2 NC 2091K)
P3/4 Streamline covers over linkage, front and rear views. (UBF-2 NC 155Y)
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Old 10-20-2007, 02:20 PM
  #4057
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Default RE: WACO YMF

You're welcome See also page 94 post 1878!
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Old 10-20-2007, 02:44 PM
  #4058
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Default RE: WACO YMF

The kink is necessary to eliminate any binding when the aileron is moved to the up position, if it were not present, the pushrod would contact the trailing edge of the wing.

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Old 10-21-2007, 08:09 AM
  #4059
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Default RE: WACO YMF

Thanks Bill, that should easily be adapted to a more direct servo connection for the scale I am building. And thanks Skylark for the photos, they really help!!!
Scott
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Old 10-21-2007, 12:52 PM
  #4060
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Default RE: WACO YMF

Yeah Bill,

that´s great, your construction for the aileron linkage. I wood realize it too at my Barth Waco, but the servo was to high at this place,
and the low profile servos were not strong enough. I would have the servo direct near the aileron, because of access to it.


Regards
Bernie
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Old 10-21-2007, 12:56 PM
  #4061
Jim Henley
 
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Default RE: WACO YMF

All,
Not sure just when I joined this group but the WACO has had it's first birthday, since I brought it at the club auction last year. Believe it or not it is just about finished. I have to put the cockpit floor in, find and install the pilot and do the final balancing on the whole airplane.
Anyway for what it is worth, here it is. I am especially proud of the homebuilt exhaust system.
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Old 10-21-2007, 01:00 PM
  #4062
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Default RE: WACO YMF

VERY NICE PLANE JIM! is that one the 1/5 or the 1/6 scale?
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Old 10-21-2007, 01:08 PM
  #4063
Jim Henley
 
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Default RE: WACO YMF

Vasek,
Thank You!
It is the 1/5th Pica, with a Saito 150 for power.
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Old 10-21-2007, 02:23 PM
  #4064
Jim Henley
 
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Default RE: WACO YMF

Bill,
Ken (Hodges) and I have had a bit of a sidebar conversation about this but wanted your thoughts as well. As posted waaay back there, I discovered that the person who had actually started this kit had changed the mounting tabs on the top of the cabane struts. Instead of positioning them where the plan called for, the original builder turned them forward, changing the location of the monting points on the wing to be slightly more narrow than the plan called for.
What I have discovered in trying to obtain the correct balance point for the aircraft, is the CG called out on the plan does not match the location on my top wing. To clairify, the modiication has moved the entire top wing forward by approximately 3/4 inch. As shown in the picture attached, the plan calls for the balance point to be 8 3/4 inches back from F-1. When I use that reference point as CG it requires much less weight than if I try to balance on that point shown on the plan which is 5 3/8 inch from the leading edge of the top wing.
The wing incidence for both wings is 0 degrees with +2 on the stabilizer. What do you think I should use for the CG? With the exception of the increased stagger of the top wing, the rest is built as per plan.
Thanks
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Old 10-21-2007, 03:01 PM
  #4065
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Default RE: WACO YMF


Quote:
ORIGINAL: Jim Henley

I have to....... find and install the pilot .....

I think I saw him behind the hangar, sipping on a bottle of 18-year old "courage"


Jim, you've done an OUTSTANDING job on that plane, it's gorgeous. The dummy engine and spinner look especially nice.
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Old 10-21-2007, 03:10 PM
  #4066
Jim Henley
 
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Default RE: WACO YMF

Thanks! I appreciate the kind words.
Yep! that's him, and he's gonna need all the "courage" he can get when this thing goes up the first time.
Got the Saito back Thursday, and got it fired up yesterday, feels like a different engine, fired right up, no back fire, just sat there and idled happily away. It transitioned nicely, so needless to say I am verry pleased. ( not to mention the boost my self confidence got)
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Old 10-21-2007, 03:19 PM
  #4067
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Default RE: WACO YMF

Jim, if I remember correctly, the CG of any biplane is 30% of the mean aerodynamic chord, or simply, measure from the leading edge of the top wing to the trailing edge of the bottom wing and the CG would be 30% of that distance measured back from the top leading edge. Hope that helps, and pleas, someone correct me if I am wrong.
Scott
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Old 10-21-2007, 03:30 PM
  #4068
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Default RE: WACO YMF

Well, for starters, I think that you need to look at what this has done to the average chord of the wing set. I think that I would consider (1) changing the tabs. or (2) resetting the C/G to the original point plus 1/2 of the gain. In other words, if the top wing is 3/4" forward of the designed point, I would move the C/G back by 3/8". I think that this will give you a starting point. Of course, you could move it back 1/4" and work from there, by shifting the battery.

I almost think that it's not worth all the work involved to reset the lugs, and rework the wing center.

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Old 10-21-2007, 03:32 PM
  #4069
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Default RE: WACO YMF

Jim,

Great job !!!!!!!

Bill, AMA 4720
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Old 10-21-2007, 04:02 PM
  #4070
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Default RE: WACO YMF

Thanks Bill & Scott,
That gives me another perspecive to look at.
Thanks again for your comments.
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Old 10-21-2007, 05:48 PM
  #4071
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Default RE: WACO YMF

Jim,

Its looking great, I like the Red better than the original Navy Blue. The instrument panel, flying wires (what did you use?) and exhaust pipes look good (post a picture of the exhaust with the cowl off so we all can see how you did it). Find your pilot, install the floor and wind shield and it looks like it will soon be ready for that first flight.
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Old 10-21-2007, 06:29 PM
  #4072
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Default RE: WACO YMF


Quote:
ORIGINAL: Jim Henley

All,
Not sure just when I joined this group but the WACO has had it's first birthday, since I brought it at the club auction last year. Believe it or not it is just about finished. I have to put the cockpit floor in, find and install the pilot and do the final balancing on the whole airplane.
Anyway for what it is worth, here it is. I am especially proud of the homebuilt exhaust system.
I have a pilot that I got from Officer and Gentlemen. It is 1/5th scale and is in the proper attire for a sport pilot. Leather jacket, and kakhi trousers. He is a full pilot, so you can mount him with you cockpit bottom, and seat. He needs sunglasses, and a headset, but these can be had. Best of all, it does not look like I stole Ken from my Grandaughter.

Bill, AMA 4720
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Old 10-21-2007, 06:33 PM
  #4073
Jim Henley
 
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Default RE: WACO YMF

Thank you John,
The flying wires are silver beading cord, and the muffler is 3/4 copper pipe. Photo attached.

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Old 10-21-2007, 09:35 PM
  #4074
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Default RE: WACO YMF

Jim,
Thats a good looking plane you got there, you should be PROUD, and your going to love the way that Saito pulls it around.


George
WACO Brotherhood # 5
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Old 10-22-2007, 04:17 AM
  #4075
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Default RE: WACO YMF

Isn't it amazing how we can take a box of planks and sticks and come out with something like that? The guys who never build will never know the feeling that producing something like that plane gives you. It's a sad thing, at least to me.

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