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AMR 33% Waco YMF-5 Build

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AMR 33% Waco YMF-5 Build

Old 04-23-2009, 07:46 AM
  #776  
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Default RE: AMR 33% Waco YMF-5 Build


ORIGINAL: germrb



The elevator servos are in the horizontal stabs (I'm sure you realized that) and I installed the rudder servo on a tray under the cockpit. Because of the fuselage shape, I crossed the pull-pull wires and reversed the servo. I also installed an extra servo in the bottom of the tail to drive the tail wheel. However, Anthony has a much better configuration, which he posted earlier in the thread. He attached both the rudder and tail wheel to a single sevo.
How did you find the room under the cockpit? The cockpit floor is imbedded into the bottom wing in the full scale. I wound up with my servo bay being behind the wing saddle on my smaller version.

Bill, Waco Brother #1
Old 04-25-2009, 05:59 PM
  #777  
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Default RE: AMR 33% Waco YMF-5 Build

Bill,

I didn't do a scale cockpit and the AMR version merely provided a false floor. Its hard to envision the cockpit floor deep enough to be embedded in the bottom wing section, but I never researched it. Even with a full cockpit, I would have moved the rudder servo a little further aft. Since, theres only one servo, it dosen't require a lot of space. Does anyone have a photo of the open airframe showing the cockpit floor, seat, etc?

After following Anthony, Lonnie, and others on this as well as your thread, I would certainly build another one much differently. These threads have been a great source of ideas as well as inspiration to move up to the next level. I'm afraid of running out of years before I get there. We have a club member (Noel Hess) who routinely took first place in scale at the old QSAA meets in Las Vegas. He's in his eighties now and still buiding, so I still have a ways to go.
Old 04-25-2009, 08:21 PM
  #778  
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Default RE: AMR 33% Waco YMF-5 Build

Bob,

Nothing for a YMF but this ATO is the only uncovered open cockpit Waco I have pictures of that shows the seats, control linkage and other stuff. It is getting ready (dis-assembled) to be re-restored as it had been started and they are now starting over.

P1 - Overall side view
P2 - Front seat area, port side, note control linkages
P3 - Both seats starboard side, note holes for the control linkage to pass thru (removed in this picture)
P4 - Inside of the rear cockpit of UBF NC 2091K. Note the forward wing attachment point next to the rudder pedal and the brown staining on the sidewall fabric showing the wing rib shape. This forward point also corresponds to the forward spar location that is typical of Waco wing construction.
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Old 04-25-2009, 10:11 PM
  #779  
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Default RE: AMR 33% Waco YMF-5 Build

John,

Thank you!! Excellent photos. Often times it is difficult to develop the proper prospective without either seeing the real thing or photos such as these. Bill's comments make much more sense. Well, at least most of the time.

I am constantly amazed at the depth of your research material. Thanks for sharing.
Old 04-26-2009, 07:41 PM
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Default RE: AMR 33% Waco YMF-5 Build

Well I had to work an airshow yesterday for the Middle Tennessee RC Club Association in Murfreesboro TN so I did not get anything done on the WACO yesterday. However I have gotten the landing light cover just about finished. It will need some sanding around the edges so that they are not so sharp. They are kinda beveled around the edges. But you can see what it will look like with the clear lens cover. Of course it would look better with the landing lights in place. I have them out now and trying to add the 3 dimensional details that are inside the light. Will probably end up using alum. Tried plastic covered with Bare medal foil but I'm not happy with the results.
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Old 04-26-2009, 07:44 PM
  #781  
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Default RE: AMR 33% Waco YMF-5 Build

Today I was able to finish the hookup of the elevator pull pull system. Also I have read enough about stab inscidence and wishing that it was adjustable to try it myself. Bill encouraged me to do it along with TR. So I gave it shot. First the elevator pull pull system.
Old 04-26-2009, 07:51 PM
  #782  
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Default RE: AMR 33% Waco YMF-5 Build

Hit the post button to soon again. Here are the pictures
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Old 04-26-2009, 07:54 PM
  #783  
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Default RE: AMR 33% Waco YMF-5 Build

Finally the adjustable stab incidence
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Old 04-26-2009, 10:28 PM
  #784  
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Default RE: AMR 33% Waco YMF-5 Build

Lonnie,

First of all, I'm really impressed with the whole arrangement. I only wish I had met up with you guys when I was building mine. I'm almost ready to order another kit and start all over again. I'm not sending out anymore of my junky stuff.

Questions: Is there a duplicate bellcrank arrangement for the adjustable stab on the starboard side? Do you have any concerns about loads? Also, I assume that the bellcrank is driven by a pushrod. Where did you locate the adjustable stab servo?

Now I understand why you located the receiver board under the center section. Putting it in the lugage compartment isn't going to work. I barely have enough room without servos.

Thanks for the pictures!
Old 04-27-2009, 06:27 AM
  #785  
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Default RE: AMR 33% Waco YMF-5 Build

Hey Bob

Haven't decided on the servo location yet. I would really like to mount it in the rear to keep the linkage as tight as I can. Just haven't figured out how and still have access. If I have to mount it up front then I will be using a carbon fiber rod. There is not a duplicate on the other side. Don't really think it is neccessary. As for the loads I talked to Bill (Stickbuilder) about it and it should not be a concern. The servo will be a High Tech Digital with metal gears and at least 164 oz. of torgue. Will be on the flap channel and use the flap knob for adjustment. The nylon bellcrank will go away. To much opportunity for it to flex.
Old 04-27-2009, 06:44 AM
  #786  
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Default RE: AMR 33% Waco YMF-5 Build

Bob
Does this help
TR
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Old 04-30-2009, 08:24 PM
  #787  
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Default RE: AMR 33% Waco YMF-5 Build

Spent the last couple of evenings fabricating the elevator hinges. These are scale hinges. They are made from G10. I used very light alum rod for the "U" bolts and threaded the ends to 4-40. The leading edge of the elevator will be a 3/4 inch wing tub. Should not flex any. It will rotate inside the hinges. The hinges will be fixed to the stab trailing edge. I will us large scale threaded control horns drilled through the wing tube right next to the vertical stab for control. When I get that far and have the final hookup I will post more pictures.
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Old 04-30-2009, 10:00 PM
  #788  
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Default RE: AMR 33% Waco YMF-5 Build

Looking good Lonnie.

Does anyone know what happened to Anthony? He has been conspicuously absent lately.
Old 05-01-2009, 07:39 AM
  #789  
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Default RE: AMR 33% Waco YMF-5 Build

Thanks Ken. I was wondering about Anthony to. Maybe he is having to much fun on that new riding mower. Nah!!!
Old 05-01-2009, 10:13 AM
  #790  
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Default RE: AMR 33% Waco YMF-5 Build

That's exactly the setup I made for my stab hinges. It works fine. I join the two elevatorhalves with a 6" hardwood dowel and the threaded control arm goes thru that and drives both sides. The dowel is fixed in place with a couple of servo screws on the bottom so they're out of sight but can be removed to take the empennage apart.....important for painting and set up. Where the dowel goes through the vertical fin I made a plywood "washer" that supports the assembly instead of hinging there as the full scale is. I use a 180 oz digital servo located just aft of the last turtledeck former to drive it with a short pushrod and ball link connectors. My plane is packed up right now for the long haul to Florida for TopGun. I'm sure that you and I engineered this setup the same way but if you'd like pix I could post when I get back in a week. Mitch
Old 05-01-2009, 10:16 AM
  #791  
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Default RE: AMR 33% Waco YMF-5 Build

Hey Mitch
Definitly want some pictures
Old 05-01-2009, 11:18 AM
  #792  
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Default RE: AMR 33% Waco YMF-5 Build

HI Guys,
I am here sort of, I have been extremely busy at work and then my PC went down a couple of days ago. I think the power supply died. Anyhow I am going to drop off the PC tomorrow but I have to work every day for the next 2 weeks so there is not much time for the Waco as it seems all my time will have to go to cutting grass.
I am checking the thread when I can from work, the server here at work will ocassionally drop it's guard long enogh to let me on.

Lonnie your build is looking great!!!
Anthony
Old 05-02-2009, 03:05 PM
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Default RE: AMR 33% Waco YMF-5 Build

I picked up a Power Supply for my PC and it is back up and running
Now off to cut grass[:@]
Anthony
Old 05-04-2009, 07:00 AM
  #794  
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Default RE: AMR 33% Waco YMF-5 Build

Did more work on the stab and elevators this weekend. Made the cutouts for the hinges in the stab and elevator. Then put everything together to see how it will work. Still needs a little refinement but from the pictures you will get the idea. Also the stab and elevator profile is not scale. This is understandable if you mount the elevator servos in the stab as show in the plans. But seeing as I have the servos mount behind the cockpit this is not and issue so I took the stab and elevator down to a scale profile.
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Old 05-04-2009, 07:03 AM
  #795  
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Default RE: AMR 33% Waco YMF-5 Build

You can see how thin the stab and elevator become. Here are some before and after of the profile
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Old 05-04-2009, 07:05 AM
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Default RE: AMR 33% Waco YMF-5 Build

Well that one picture of the new profile is not that good. Here are a couple more. Hope this give a better idea of the profile
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Old 05-04-2009, 07:16 AM
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Default RE: AMR 33% Waco YMF-5 Build

You know I really need to clean up my work bench. I would also like to mention that TR has been helping to keep me on the straight and narrow on this build. His advise has been priceless.
Old 05-10-2009, 06:39 PM
  #798  
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Default RE: AMR 33% Waco YMF-5 Build

Anthony,

Are you mowing the entire state of Ohio? Perhaps we should all take up a collection and buy Anthony a new computer and a herd of goats.

I got my WACO out of winter storage this weekend. I am excited to continue doing some more flight tuning on Monday. Remember Mondays? Now it is the first flying day of the week. Ok, that's cruel and unusual punishment for the poor working stiffs.

Hope you can get some time for yourself and the WACO. Hang in there, your day is coming.
Old 05-11-2009, 10:52 AM
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Default RE: AMR 33% Waco YMF-5 Build

Hey Bob

Don't want to hear about Monday's. They are a pain in the you know what for me. I still work. Like I said before. I think Anthony is having too much fun on that new mower.
Old 05-11-2009, 06:18 PM
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Default RE: AMR 33% Waco YMF-5 Build

Work is really getting to me[:@] I haven't had a day off in 3 weeks and I am leaving the house at 5:15 am and get home at 6:00 pm. Throw in 3 hours of cutting grass twice a weekand whatever else the wife thinks I must get done and I am pretty much beat down
To top it all off I need about 10 hrs of work to get my Pepino 1/4 scale airworthy and I am going to have to make time for that as I am missing out on some great flying weather.

Lonnie you need to stop doing so much great work on your Waco as I am going to have to go back and redo too much of mine if you keep it up!!
Anthony

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