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WACO YMF

Old 06-12-2016, 03:08 PM
  #18776  
mrdhud
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Originally Posted by tmac48
https://youtu.be/rIPTeqWxzs8

Nice day so took the Waco out. Link to YouTube video (taken on iPhone 6) quality is OK.

Regards



tmac 48
Looks like you had a fun day. I like the looks of your flying field plenty of room.
Old 06-12-2016, 05:26 PM
  #18777  
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Sorry to take so long to reply. I see that I am slightly in error. After watching the video shown above, you will notice another titled Saito FG 84 R3 Intake Modification.So I guess this refers to another, larger (?) Saito radial. Very interesting, nonetheless. In short, on that engine it was found that each cylinder was getting a different mixture, leaving one lean and one rich. A man with apparent motor car racing credentials has a mod for that engine. Fascinating, to me. After watching this it would make me wonder if all sizes of this type would have the problem in stock form.
https://www.youtube.com/watch?v=ffUehgpp8Ug
Old 06-12-2016, 05:37 PM
  #18778  
Stickbuilder
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I do know that on mine, when you're shooting an approach and throttle down, if you don't have on board glow drivers, the #2 cylinder will drop out. The other 2 cylinders don't produce enough power to drag the dead cylinder and make enough power to go around. As far as I'm concerned, it's an interesting paper weight and not much else.

Bill, Waco Brother #1
Old 06-12-2016, 07:06 PM
  #18779  
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Yeah. Exactly as those fellows who made the video say. Watch that video. They claim to have evened things out.
https://www.youtube.com/watch?v=ffUehgpp8Ug
Old 06-18-2016, 06:15 PM
  #18780  
ctflyboy
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what the hell is up with RCU,lately every night when I come to the site I get a message reading
"R C Universe is not responding.
Old 06-18-2016, 06:28 PM
  #18781  
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i haven't had any issues with RCU in a while.

Might be time to empty your cache of cookies and logout of RCU then back in. Might fix the issue.

on another note, that is a very interesting video!

Bill S.

Last edited by Twin_Flyer; 06-18-2016 at 06:44 PM.
Old 06-18-2016, 06:34 PM
  #18782  
Cougar429
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Took the 1/5 Pica out for the first time this season and it fired up instantly. Stately as ever and seems to get lots of attention.

Let my turbine friend have some time at the sticks to show what the other end of the speed range is like.

International Biplane Day coming up next Saturday so hope the weather cooperates.
Old 06-21-2016, 11:31 AM
  #18783  
Prekin
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Does anybody has some factory or another picture of WACO YMF where is visible which parts are covered by fabric or aluminium?
Old 06-21-2016, 02:40 PM
  #18784  
mrdhud
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Originally Posted by Prekin
Does anybody has some factory or another picture of WACO YMF where is visible which parts are covered by fabric or aluminium?
Prekin,
I don't have any pictures I can post but if you do a Google search for HD Waco YMF and click on images you may find what your looking for. Hopefully some one may have pictures they can post. Good luck in your search.
Old 06-22-2016, 03:36 AM
  #18785  
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Thank you for advice. I´ll try it.
Old 06-22-2016, 07:07 PM
  #18786  
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Hello fellow Waco fans. Got a question. I have an old Dave Platt 60 size (1/6 scale) YMF Waco that I'm almost finished with. I scaled it out and covered it with Sig Koverall and dope with paint trim. What flying weights have you guys seen with a scaled out 1/6 size plane? I'm a little concerned about it getting a little heavy. It looks good, but weight is concerning. I think it might come out around 9 pounds - maybe a few ounces more. I tried to keep the weight down as much as possible like balsa wing fairings instead of epoxy/micro balloons. Engine is a .60. Thanks...Gary
Old 06-22-2016, 11:45 PM
  #18787  
jeffo
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I would use a .90/1.20 four stroke engine.You didn't say how it balanced,but I'm sure with a two stroke .60 you'll need nose weight.I have the 1/5 scale waco,it to seems heavy,but flies great.If you can squeeze a DLE 20cc,that to would work.jeffo
Old 06-23-2016, 06:11 AM
  #18788  
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I too would recommend a 4-stroke, (with personal preference for the Saito 100 for your app) primarily due to the ability to swing a large diameter prop you need to get out beyond that large cowl. Also, they just sound more scale.

9 lbs may be getting a bit on the bulky side, but don't forget these have a huge wing area for that size. You should be fine with the recommended engine.
Old 06-25-2016, 07:03 PM
  #18789  
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My friends dad built the Dave Platt in 1979 or 80. Silk and dope and a Super Tiger .60. The plane is still around. When it was built there were no reasonable four strokes and big two strokes were a novelty too. A OS .90 was giant scale territory. Back then .61 was the biggest engine you could use in normal scale competition; any bigger was giant. The rules changed when the 4 strokes came in force. It will fly with a .60, but it flies on the wing. There is no extra power, shallow climbs, maybe a tight loop from level, not fast. .91 four stroke lets the blades clear the cowl. I fly my Pica Bucker with a Magnum .91 and it is nice. An OS or Saito would be a little better but it is fine for most flying. Because it will not be flying fast, you will be surprised when you close the throttle to land. Drag will flat stop it in the air. You will probably be flying at 1/2 throttle on final until you start the flair. Dont and you will be way short landing.
Old 06-28-2016, 07:00 PM
  #18790  
codiddley
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Got my 1/3 Proctor Waco out for the first flights of the season. What a sweet flying bipe! Definitely the heaviest airplane I have ever flown! Wish I had video. The DA-150 really makes a great noise on those low passes!
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Old 06-28-2016, 07:35 PM
  #18791  
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Originally Posted by codiddley
Got my 1/3 Proctor Waco out for the first flights of the season. What a sweet flying bipe! Definitely the heaviest airplane I have ever flown! Wish I had video. The DA-150 really makes a great noise on those low passes!
Sweet
Old 06-29-2016, 06:44 PM
  #18792  
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Originally Posted by codiddley
Got my 1/3 Proctor Waco out for the first flights of the season. What a sweet flying bipe! Definitely the heaviest airplane I have ever flown! Wish I had video. The DA-150 really makes a great noise on those low passes!
That is a good looking Barth Waco!! hope to have mine out again this weekend.
tmac48
PS. What size and make prop are you running ?

Last edited by tmac48; 07-01-2016 at 04:56 AM.
Old 07-11-2016, 02:49 AM
  #18793  
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Okay, finally catching up on work and even though it's summer and everyone is flying,I want to get back in the shop and work on the WACO. It is a pica 1/5 scale and was built straight and true by the previous owner,but he covered it with monokote and I really believe this plane deserves to be covered in fabric and painted. I like what I've learned about the stits lite process. I ordered the DVD and have watched it several times. It seems to be a fairly simple process, I noticed that through the whole process, the guy in the video never uses any kind of respirator while spraying the poly brush,poly spray or poly tone. I know by reading that a lot of guys have used the stits lite process for scale models. So to wrap it up, two questions: Do you think the additional weight of the stits lite will make a big difference in flight performance vs the monokote that is on it now? Is this stuff safe enough not to use any kind of respirator at all? Thanks for the help.
Old 07-11-2016, 03:06 AM
  #18794  
Cougar429
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Regardless of the method you should always follow the recommendations on the container. In any event, adequate ventilation for yourself and any others is good policy and likely the safer option. Some of the toxic elements can be cumulative and may not show their effects until a critical level is reached, (so you may not immediately show negative symptoms).


I've done a few with silk and dope over the years with auto paint final coat(s). From my own experience the initial covering and shrinking is relatively easy, although the dope itself outgasses terribly. With dope a very high majority evaporates so repeated applications are required to fill the weave. The auto paints available back then were able to bind to the dope, but without the flex agent added were brittle and vulnerable to cracking and breaking off. Not sure how the newer water-based coatings would work.

I have the 1/5 Pica and with their design the wing loading is relatively light to begin with, (I weighed it a while ago but cannot remember the number. Will be bringing it with me to a scale event next weekend so will try and check it again). That translates to more benign handling, slower take offs and landings and even a more scale appearance in the air. I find the drag a bigger factor with this one.
Old 07-11-2016, 05:13 AM
  #18795  
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I've used the Stits/PolyTone process on 5 or 6 planes. Straightforward and very forgiving but somewhat time consuming due to the number of paint layers (poly brush, poly spray, color, clear). I always use a respirator but I know people who don't bother. The stuff is not deadly like some automotive paints but still contains some very nasty solvents. I use a disposable 3M respirator (3M 53P71PC1-B Paint Spray and Pesticide Respirator). About $25 and lasts for a year or 2. Just keep it sealed in a ziplock bag between uses. Use MEK for thinning and for paint gun clean up.

The finish will last 25 years but be aware that any solvent will take the finish off the plane as it is not a 2-part cured finish.

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Old 07-15-2016, 11:53 AM
  #18796  
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I am building the AMR 33% with Moki (RCS) 215 cc radial, I am looking for advice on the proper propeller for this combination, 32 diameter seems to be about right, but as far as the pitch goes, I have read anywhere between 10 and 18.
Anyone running the radial?
Thanks!!
Old 07-24-2016, 06:22 PM
  #18797  
mrdhud
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Hello all
Went flying Saturday had two good flights on the Waco and spent some time giving interdictory flight to several kids with the trainer. Its a good feeling helping someone learn to fly. I wanted to get in one more flight with the Waco before calling it a day after fueling up I fired her up and taxied out to the runway and lost all throttle I hit the throttle cut but no help she just keep moving and at a pretty good rate so what do you do I just started going in circles in the grass one of the guys seen I was having problems and came out to see what was wrong I handed him the radio and had to grab the tail to stop it not the smartest thing to do but all I could think of. I will be installing kill switches in all my planes before flying them again.
Old 07-25-2016, 12:05 PM
  #18798  
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Scary, Dan. No injuries? Any damage? Did you identify the source of the failure?

Mike
Old 07-25-2016, 06:40 PM
  #18799  
mrdhud
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Originally Posted by mikedj
Scary, Dan. No injuries? Any damage? Did you identify the source of the failure?

Mike
Hey Mike no damage or injury I haven't had a chance to check it out yet I'll let you know what I find.
Old 07-26-2016, 05:28 AM
  #18800  
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Glad all is ok. Definitely would like to hear about the point of failure if and when you find it.

Mike

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