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Thread: WACO YMF


  1. #2701

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    RE: WACO YMF

    Jay, don't forget our warbird fly-in tomorrow (Sat 6/02) Weather looks good until at least late afternoon. Hope you can make it.

    www.wham-rc.org for directions
    Club Saito #2, WACO Brotherhood #20. What other trouble can I get into?

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    RE: WACO YMF

    I think he must have been thinking about the thread in the seaplane section, "Show us your beaver."

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    RE: WACO YMF

    OK, OK, hahaha ha HA. The shirts are tentatively scheduled to be printed TUESDAY JUNE 5th. Sheez.. can't you guys even read minds??
    Everybody knows you can\'\'t make a time machine out of a Tilt-A-Whirl.........-:WACO Brotherhood 25:-

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    RE: WACO YMF

    HELP[b]
    I recently acquired a Pica Waco YMF-3 kit 1/6 scale 60" wing, however all the plywood parts are missing, I am hoping that out there somewhere there is someone that can provide me with templates for these parts.
    Thank you one and all
    John
    johnexi@aol.com

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    RE: WACO YMF

    Building with animal hair conjures up images I don't even want to think about, especially given the connotations of beaver fur in other context

    We had a good fly-in today; not a lot of out-of-towners, maybe due to gas prices, but a great turnout of spectators and local flyers. A couple of guys did come over from Sevierville Tenn, a long haul just to spectate, they didn't fly. The weather was perfect, just a slight breeze which started picking up about 2:30, and mostly overcast, which kept the sun's glare down.

    I got two great flights on the UMF, even got comfortable enough to do a roll. The changes I made to the control throws took out the twitchiness, and the changes to the tailwheel alignment with the rudder and allowing some free caster was just what I needed to make the takeoff roll more controllable. I did have one little, uh, incident, though. Not with the Waco, no, no, no.

    We had a bunch of WWI stuff there today, and somebody suggested a gaggle flight of all Fokker airplanes. We fired up two BUSA 1/4 scale D-VII's , an SR Batteries 1/4 scale Eindecker, a BUSA 1/4 scale D-VIII, and my GP DR-1. We were all buzzing around in a big melee, and I came up behind the D-VIII. I thought I was outside him in the turn, but not far enough and the right wingtips on my top and middle wing went through his prop. I went into a right hand spin from about 250 feet with most of the right wings gone, and totally trashed the DR-1. The D-VIII on the other hand kept flying and he made the runway and did a perfect landing, engine still running, but with half of one prop blade gone. The only other damage he sustained was a tiny ding to his cowl.

    He said he was going to paint a small Maltese cross on the side for an air-to-air victory. I hate losing the plane, but I'm not the least upset about it, well...... The way I look at it, now I have an available .91 Saito, a Rx and 5 servos for another plane. I do need to send the engine in, there's a small dent on one pushrod tube and the needle body on the carb got bent; I want to make sure the crank isn't damaged. The whole front of the engine was buried in the dirt.

    heck, it was just an ARF If I had to crash a plane today, I'm real glad it was that one. I got three good flights on it today before the crash.
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    Club Saito #2, WACO Brotherhood #20. What other trouble can I get into?

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    RE: WACO YMF

    Ken --
    Awfully sorry to hear about that. I bet your DR1 was "just an ARF" like your Waco is "just an ARF"....
    So it's a real loss. But you have plenty more aircraft to throw up in the air, so keep 'em going.
    MobyAl

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    RE: WACO YMF

    All,

    Thanks to ChrisMH, the Supplimental Web Site, House of Moy http://www.houseofmoy.com/waco/ , has been updated with an updated Plans, Kits and Documentation List (more stuff) and a partial Index to this site (and more). The Index is still being cataloged and updated as I get time. The first column is the subject, 2nd - author, 3rd - Initial post #, 4th - page #, 5th - more info about the subject and/or the location of the subject if not on this thread. And yes, I have noticed some mistakes (after posting) that I will be correcting. Hope this will help you find things that have been posted on this monster thread.
    John F Howard (aka skylarkmk1)
    AMA 10955, WACO Brotherhood #26, AWC, NWC

  8. #2708
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    RE: WACO YMF

    Ken- Couldn't make it today. I had enough time to fly my Super Skybolt 3 times though. Sorry about your crash. Do you know about the 8th annual IMAA Fly-in near Salisbury NC next weekend (June 9 &10)? I'm planning on going down for one of the days. Oh, I forgot, you are going to Ohio, right? Tell Ernie and some of those guys about it. Have you ever been to it? For those who have not been to it the facility is fantastic; a private grass airfield used for this Fly-in every year. The Statesville Model Flyers put on the event.
    Everybody knows you can\'\'t make a time machine out of a Tilt-A-Whirl.........-:WACO Brotherhood 25:-

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    RE: WACO YMF


    ORIGINAL: khodges

    Building with animal hair conjures up images I don't even want to think about, especially given the connotations of beaver fur in other context
    Could you be referring to my Ikon'N West Beaver? I don't think so, too many vacuum formed moldings.

    Sorry you lost your model but you missed the main advantage, not only do you have the machinery for another model going begging but you also have room in the hangar for more, probably the most important advantage.



    WACO Brotherhood No. 14.

    old git - - - - - - aka John L.

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    RE: WACO YMF

    WACO Brothers


    I am laying out the 1/8" ply dihedral wing braces they will be 12" long from center extending out three wing ribs. Using my protractor set at 2 degrees this gives me 13/16" clearance at the end of spar. Does this sound right?? I hate to muff this part up.
    Dan Hudson WACO Brotherhood #45
    GIT-ER-DUN \"Build a WACO\"

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    RE: WACO YMF

    I read about the event in the AMA Calendar. I'd like to go, depends on what the wife already has planned. I don't fly out to Creve Couer til the following Thursday. I'll certainly pass the word, I'm sure Ernie or some others might make it. Do you have a link to directions from Statesville, either I-40 or I-77?
    Club Saito #2, WACO Brotherhood #20. What other trouble can I get into?

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    RE: WACO YMF


    ORIGINAL: old git

    but you missed the main advantage, not only do you have the machinery for another model going begging but you also have room in the hangar for more, probably the most important advantage.

    Funny you mention that. My storage was at the point that I have to keep one plane on the worktable, and then move them around like one of those little puzzles until I got the one I needed on the table to work on it. What I'd really like is a bigger shop.
    Club Saito #2, WACO Brotherhood #20. What other trouble can I get into?

  13. #2713
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    RE: WACO YMF

    Ken- Take I-77 to Statesville Exit 49-A. Go east on Hwy 70 to Rowan Co. Line (about 8 miles). Field is on the left behind Shaver Wood Products. Watch for signs. Let me know what day you might go.
    Everybody knows you can\'\'t make a time machine out of a Tilt-A-Whirl.........-:WACO Brotherhood 25:-

  14. #2714
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    RE: WACO YMF

    Dope and fabric covering. Here's what I do.

    1. After the part is covered, spray two coats of nitrate in a 70% thinner, 30% dope mix. This allows the dope to penetrate and encapuslate the fibers. Note: For synthetic fabrics (Stits, Coverall, Ceconite) unless sprayed (or rolled or brushed) really thin, the dope will sit on top of the fabric surface and not penetrate the fibers. I literally peeled the dope finish from a PT-19 rudder that was not done correctly. With natural fabrics (silk, cotton) the dope will be absorbed very quickly. Natural fabrics will fill much faster than synthetic fabrics.

    2. Spray two coats of butyrate clear to the same ratios as above. You still need the dope to penetrate the synthetic fabrics and lock it to the fibers. Natural fabrics will start to fill.

    3. Spray two or three coats of silver butyrate buildup dope. This stuff has fine aluminum powder added to help prevent the fabric from absorbing UV light which can degrade the covering over time. LIGHTLY wet sand off one coat of the silver dope using 320 paper or higher and try not to sand on the ribs. Thoroughly wash down the part and allow to dry When sanding, dump in a bit of hand dish washing soap into your water bucket. It acts as a "lubricant" for the sandpaper. Spray one more coat of silver to cover and protect the fabric. Silver is used to prevent that opaque look to doped finishes. It may be nice to have that "see through" look on a vintage R/C assist free flight but not a scale model!

    4. Spray two coats of white. White acts as a base coat for all pigmented color dopes. Sand if needed, same procedure as above but use 400 or 600 paper.

    5. Spray your pigmented colors, lighter colors first then dark. Use several light coats, not one heavy coat.

    6. Allow the part to "cure" for at least 72 hours then spray a batch of dope, thinner, retarter in @ a 40%, 30%, 30% mix. Note that this will be super thin so try to spray a light, wet coat and keep the part as flat as possible to prevent sags. Allow to cure for at least a week then rub with fine rubbing compound and add a coat of wax. The end result should be a nice shiny finish (Nightstalker would be proud) with enough dope that allows the fabric weave to be seen.

    Note: When using silk or cotton, use a taughtening nitrate and butyrate dope. Synthetic fabrics should use a non-taughtening dope. Try to use products from the same manufacturer. Brodak is Randolph dope, Sig is a different formula.

    Of course, when using the Stits process fill the fabric according to the manufacturers instructions. The same for the polyurethane, water based or other finishing systems.

    FMI: http://www.conaircraft.com/
    He's crazy Lew, he builds toy airplanes!"
    Frank Towns - Flight of the Phoenix (1965)

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    RE: WACO YMF

    Today, started brushing nitrate on the fuse, and tail feathers. I'll let that sit and cure a while and then see if it needs more dope to fill or if I can start with the primer. Wow! I fogot how strong dope fumes are, this is the first dope job I've done in years. Once I get the fuse and tail feathers sealed with the nitrate I'll start the wings. With any luck, I'll get this thing finished by Labor Day...
    Jim,
    WACO Brotherhood #3, AMA 816592, IMAA 41683,

  16. #2716
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    RE: WACO YMF

    Dan,

    In the long manual for the 1/5th WACO, for the top wing on page 9, step 1 and 2 are the steps for the wing dihedral brace/spar assembly. At the last W-6 RIB (outer most), the manual state 7/8" is equal to 2°. If you draw the center spar flat, at W-3/W-4 measure out the distance to the last W-6 and measure up 7/8" and that will be the 2° angle.

    For the bottom wing on page 16, step 2 has the measurement at 3/4" for 2°, but the bottom wing is a little shorter from W-3/W-4 to W-6.

    Check the measurements from w-3/W-4 to W-6 and adjust accordingly. On the 1/6 WACO this works out to be just under 11/16" (.7291) for the top wing and 5/8" (.625) for the bottom.
    John F Howard (aka skylarkmk1)
    AMA 10955, WACO Brotherhood #26, AWC, NWC

  17. #2717
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    RE: WACO YMF

    Worked on all the 'T' formers today. Cut all from 3" X 36" X 5/32" Sig balsa and used Forstner bits for the lightening holes. From start to finish these took 2 hrs and 45 minutes.
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  18. #2718
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    RE: WACO YMF

    I remember when I started cutting out all the parts for my Waco, what a job. Today I finished covering the fuselage and my wife says," I remember when you first started cutting pieces". Too funny, we're both enjoying the many stages of scratchbuilding. An even more enjoyable experience, we left our two young boys to fend for themselves and we headed off to a Float Fly. After visiting for awhile we found ourselves admiring a 1/5th kit built YMF on floats. Who'd of known we would run into this. We thought mine would be the only one around for miles!
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  19. #2719
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    RE: WACO YMF

    Michael - Thanks for the info on your covering and finishing methods. I am studying as many techniques as I can, and will probably use the information to come up with my own "Doggie" methods. Hey speaking of purdy, shiney aero'chines - how are those new fangled Chinooks going up there at Boeing? You guys are up to F and G models I read. Wow - I started in Super Chucks (C models with L-712 engines) then D's / MH-Ds (I crewed one of the first original MH-D models with aerial refueling probe - tail# 342 at Ft. Campbell) and then got out right before the 160th got their first Echo models. Man I'm feeling old[8D] - Thanks again for the tips on finishing.

    Todd
    WACO Brotherhood #47

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    RE: WACO YMF

    skylarkmk1

    Thanks for the info sounds easy enough. MAN !!! I have a new found APPRECIATION for you scratch builders. I spent most of the weekend cutting out wing ribs had about 1/2 done and threw every one in the trash. To much double sided tape, saw not cutting square, and trying to use a drum sander on my drill press. But fear not this is only a set back.

    Think I need to do some adjusting on my scroll saw and look into buying some kind of sander ( any suggestions ) I only lost about six pc of 5/32 balsa so I dont feel to bad I ordered 30 pc. At lest I learn from my mistakes. Back to the drawing board. Keep up all the good work your doing.

    Thanks
    Dan Hudson WACO Brotherhood #45
    GIT-ER-DUN \"Build a WACO\"

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    RE: WACO YMF


    ORIGINAL: Nightstalker

    Michael - Thanks for the info on your covering and finishing methods. I am studying as many techniques as I can, and will probably use the information to come up with my own "Doggie" methods. Hey speaking of purdy, shiney aero'chines - how are those new fangled Chinooks going up there at Boeing? You guys are up to F and G models I read. Wow - I started in Super Chucks (C models with L-712 engines) then D's / MH-Ds (I crewed one of the first original MH-D models with aerial refueling probe - tail# 342 at Ft. Campbell) and then got out right before the 160th got their first Echo models. Man I'm feeling old[8D] - Thanks again for the tips on finishing.

    Todd
    WACO Brotherhood #47

    Crankin' em out! We're trying to get them delivered ASAP cause some good guys need them now and are working them hard. Right now I'm messing with the V-22 Osprey at NAS Pax River, MD. doin' things the Navy/Marine way. Jeez, I have an airshow everyday!

    A couple of things I forgot about doping.....use a good filter mask so you don't breathe in the dope. Spray in the hot sun as this will help the cure process. And, those nasty little gnats and bugs will be drawn to your work just by the smell. They especially like yellow because it's bright and smells so nice. If you get blushing in the initial coats, don't worry because you will be using retarter in your final coats.
    He's crazy Lew, he builds toy airplanes!"
    Frank Towns - Flight of the Phoenix (1965)

  22. #2722

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    RE: WACO YMF

    All,
    I have an elementry question, how do you know when you have the fabric filled with sufficiant Nitrate? I have two coats brushed on reduced with thinner 50 / 50, just like the instructions say to. I only have the fuselage and tail feathers doped out, I want to make sure I am getting the dope on correctly before tackling the wings. ( I will also want to check the incidence one last time in case I need to tweak things before covering them in dope.
    Thanks!
    Jim,
    WACO Brotherhood #3, AMA 816592, IMAA 41683,

  23. #2723
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    RE: WACO YMF

    Dan,

    The manual and the plans say all the ribs are 1/8" stock not 5/32". Save some weight and $$$. Suggest making a good accurate template of the parts (1/16" to 1/8" ply, light aluminum, etc.) and use this to cut you ribs out. You can save the template to make another plane or as patterns for repairs.

    On your saw, square it up if you can, place a square against the blade and table. A simple way of checking is to take a piece of thicker stock, make a cut and flip one of the pieces over top to bottom (180°) and push them back together. If it is square, the pieces will fit, if not you will have a gap and will need to adjust your saw accordingly.
    John F Howard (aka skylarkmk1)
    AMA 10955, WACO Brotherhood #26, AWC, NWC

  24. #2724
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    RE: WACO YMF


    ORIGINAL: Michaelj2k


    ORIGINAL: Nightstalker

    Michael - Thanks for the info on your covering and finishing methods. I am studying as many techniques as I can, and will probably use the information to come up with my own "Doggie" methods. Hey speaking of purdy, shiney aero'chines - how are those new fangled Chinooks going up there at Boeing? You guys are up to F and G models I read. Wow - I started in Super Chucks (C models with L-712 engines) then D's / MH-Ds (I crewed one of the first original MH-D models with aerial refueling probe - tail# 342 at Ft. Campbell) and then got out right before the 160th got their first Echo models. Man I'm feeling old[8D] - Thanks again for the tips on finishing.

    Todd
    WACO Brotherhood #47

    Crankin' em out! We're trying to get them delivered ASAP cause some good guys need them now and are working them hard. Right now I'm messing with the V-22 Osprey at NAS Pax River, MD. doin' things the Navy/Marine way. Jeez, I have an airshow everyday!

    A couple of things I forgot about doping.....use a good filter mask so you don't breathe in the dope. Spray in the hot sun as this will help the cure process. And, those nasty little gnats and bugs will be drawn to your work just by the smell. They especially like yellow because it's bright and smells so nice. If you get blushing in the initial coats, don't worry because you will be using retarter in your final coats.
    Yeah - Like we got hot sun here in Arizona And as far as blushing goes, well... sometimes my finishes are embarassing Oh, and what are flying bugs? It's the damn scorpions that will really do a nice finish in (and the finisher). If I see'em, I dope'em - point blank... kinda like a mini gun burst - but not near as loud (or spectacular).

    Thanks Mike!

    Out Here
    Todd
    Waco Brotherhood #47

  25. #2725
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    RE: WACO YMF

    The tee shirts have been ordered and the printer says they will do 'em Thursday. I've ordered a few extras just in case. Hopefully we'll be able to ship them out on the 11 th or 12th of June (yeah, yeah, this year).
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