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WACO YMF

Old 07-30-2012, 11:10 AM
  #15176
ceije
 
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Default RE: WACO YMF

Dan, I know your a gas power type and i Nitro but i think, when i get to it i'll go to a DLE 55 it should be enough for the 1/4 . I finally decided that i'll use the Saito radial if it will start. it last ran in 1986 and has been boxed except fot the last 3 years, if it doesn't turn over i have the OS twin 300 both turn a 20/8 or a 20/10 prop.[8D][8D]

regards,
Chris #196

"sometimes you have to build it a little wrong in order for it to look right"DAVE PLATT
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Old 07-30-2012, 11:40 AM
  #15177
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Default RE: WACO YMF

Chris,
Sure hope you get your radial running it would be a shame not to use it. I was thinking on the lines of using a G62 heaver then the DLE but it a long way off.
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Old 07-30-2012, 04:45 PM
  #15178
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Default RE: WACO YMF

Wayne, Give us a few more pic's of your flight and the plane.

Bill, I love this thread.......

Eddie of OKC

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Old 07-30-2012, 07:12 PM
  #15179
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Default RE: WACO YMF

The trick is not to use outer wheel collars. Instead, solder a piece of brass tubing to a brass Tee that you will cut from a strip of K&S brass strip (I used a piece that was 1/32 thick, and then drill a small hole just before the end of each point of the Tee. Drill a corresponding hole for each of the 3 holes in the outside of the wheel pant. Once the wheel and inner pant is mounted, add a 2-56 screw to the pant and tee. The piece of tubing will hold the wheel in position, and the 3 screws look just like what the full scale has.

Joe, the hatch and latch are found in posts 7785 and 7811. The cabane strut modification is found in post 8064 and 9083.

Here is a pic of the wheel pant showing where the tee goes.

Bill, Waco Brother #1
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Old 07-31-2012, 08:39 AM
  #15180
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Default RE: WACO YMF

Re:  An appropriate pilot figure

I have been searching for an appropriate pilot figure for my 1/5 scale YMF-3 without success.  What I would like to use is an "old-timer/barnstormer" figure - with a scarf, if possible.  I would appreciate any advice as to where I might find such a pilot figure.

Thanks,

Jim
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Old 07-31-2012, 08:59 AM
  #15181
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Default RE: WACO YMF

Dan, I'm working on installing the radial on the frame as we speak for a run-up, my major concern is exhaust oils soakting the wood, looking at setting a small throw rug right behind the exhaust tubes as a deflector. not too worried about a carpet and it should work.

Chris #196
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Old 07-31-2012, 06:40 PM
  #15182
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Default RE: WACO YMF

Hi Bill,
Not getting tired of the thread, as a matter of fact I check in on a daily basis to see who's doing what. Just so you know I'll be starting a 1/5th scale shortly and I'll be checking in and adding some input as I go.
George
WACO Brotherhood # 5
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Old 07-31-2012, 07:00 PM
  #15183
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Default RE: WACO YMF

Bill,

Quote:
Hi Bill,
Not getting tired of the thread, as a matter of fact I check in on a daily basis to see who's doing what. Just so you know I'll be starting a 1/5th scale shortly and I'll be checking in and adding some input as I go.
George
WACO Brotherhood # 5
DITTO!

I hope to start the 1/5 Pica Waco this fall...
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Old 07-31-2012, 07:37 PM
  #15184
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Istill haven't attached my cowl, as Iwas hoping to locate someof SIG's discontinued 1/4 turn latches. Ihave given up on those and have settled on using a system Iused on the cowl of my 1/6 scale P-40. Hopefully, these will also be very unobtrusive when completed.

I'm using 4-40 x 11/2" socket head screws for my attachments. I have attached a piece of thin aluminum to the bottom of 1/4 aircraft ply and attached it to the inside of the cowl. Then I drilled a hole just large enough to clear the 4 x 40 screw all the way thru the alum. Next I opened the hole large enough for the head of the screw to fit into, going as close to the alum as possible without enlarging the hole. While not necessary, Imade the hole large enough for a short piece of alum tube to line the hole with a close fit on the screw head. When primer fills the small gap between thecowling surface and the alum tube, it will be a very neat hole.

The depth of the hole to the alum is deep enough to allow the screw head to go well below the surface. By some careful fitting, a smaller piece of alum tubing can go in the hole to control the depth of the screw head, leaving it flush with the surface. Once painted, it almost dissappears.

As for the internal securing points, a small block of wood will be epoxied to the aluminum on the cowl and drilled out for the screw. This piece will beabout 5/8" thick and should extend to about the edge of W-1, the firewall. The piece that attaches to the firewall will have the brass threaded insert already in it and will be screwed up tight to the underside of the cowl. When the cowl is fitted in place, the latter pieces will be epoxied to the firewall. Since they will be screwed tigthtly to the underside of the cowl when they were gluedin place, there should be no danger of warping the cowl due to over tightening the screws when it is removed and replaced. The small circle I have tried to draw around the screw shows about where the seperation point is between the cowl block and the fixed block on the firewwall.

I'm sure this is not a new technique, but Ihaven't seen it shown anywhere else.

Joe
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Old 08-01-2012, 02:07 PM
  #15185
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Default RE: WACO YMF

Joe, I like your idea on mounting the cowl I’ll have to keep that one in mind
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Old 08-01-2012, 04:40 PM
  #15186
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Quote:
ORIGINAL: mrdhud

Joe, I like your idea on mounting the cowl I’ll have to keep that one in mind

Glad you like it, Dan. Here are a few more photos of the process. They are pretty much self explainitary, with a note or two. Since the rear edge of the cowl is even with the back of the firewall, when Idrilled our the firewall mounts, I placed them on a piece of 1/4 " plywood, the same as my firewall. Idrilled through the mount on the cowl and into the firewall mount with the clearance drill for the 4 x 40 screw. Using that as a guide hole, I drilled the hole for the brass insert and screwed it in flush with the surface. Screwing everything up tight, Idid a trial fit on the firewall. It took a few trial fits, and some clearance cuts for the engine mount, but I'm very happy with how it came out. The mounts do take up a little room in the cowl. We'll see how it works out when Itry to stick a battery or two up there.

Joe

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Old 08-01-2012, 05:02 PM
  #15187
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Default RE: WACO YMF


Quote:
ORIGINAL: jmdunstan

Re: An appropriate pilot figure

I have been searching for an appropriate pilot figure for my 1/5 scale YMF-3 without success. What I would like to use is an ''old-timer/barnstormer'' figure - with a scarf, if possible. I would appreciate any advice as to where I might find such a pilot figure.

Thanks,

Jim

Officer and Gentleman has one. It is a civilian sport pilot. Looks good, wearing a jacket and slacks.

Bill, Waco Brother #1
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Old 08-02-2012, 06:17 AM
  #15188
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Default RE: WACO YMF

Been at this game a fair number of years, and If it was me, I would mount the cowl like it was a servo; i.e., rubber gromets in the cowl, brass eyelets in the gromets, and screws thru the eyelets. Let any vibration be absorbed by the gromets, and not the fiberglass. I realize you are running a twin, so not as bad as a single, but vibtration never the less.

Les
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Old 08-02-2012, 06:51 AM
  #15189
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Default RE: WACO YMF

Joe,

Go back one page. I posted a pic of the wheel pants and I'll put one of the hatch here. Seat too (can't resist) Someone asked about the cabane struts too, so here they are.
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Old 08-02-2012, 08:23 AM
  #15190
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Default RE: WACO YMF

Neat work, Bill.

I'm still trying to figure out how you did the wheel pant to hold on the wheel. I'm guessing now, butyou mentioined the brass "T" that screws into the outer side of the pant, and has a piece of tubing soldered to it. Does that piece of brass tubing actually pass over the wheel axiel ? If so, then you're counting on the stiffness of the pant to hold the wheel in place. Correct? I can visualize how that works, but it seems like a good side load from the inside would cause a lot of flex on the outboard side of the pant.

Your seat looks neat, but the photo was so small Icouldn't tell much about it.

Joe
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Old 08-02-2012, 08:29 AM
  #15191
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Quote:
ORIGINAL: LesUyeda

Been at this game a fair number of years, and If it was me, I would mount the cowl like it was a servo; i.e., rubber gromets in the cowl, brass eyelets in the gromets, and screws thru the eyelets. Let any vibration be absorbed by the gromets, and not the fiberglass. I realize you are running a twin, so not as bad as a single, but vibtration never the less.

Les
Les,

I'm sure that would save a lot of wear on screw holes in the fiberglass, but they would stand out like a sore thumb. My goal here was to make a good solid mount and still keep it somewhat scale looking. The mount Ihave made should be solid enough, and the holes for the screws are actually protected by the wood on the inside, sothat there should be no vibration problems causing enlarged holes or cracks around them.

Joe

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Old 08-02-2012, 11:09 AM
  #15192
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Default RE: WACO YMF

Joe, I did the horseshoe brass that is being spoke of for the wheel pant. Only I soldered a wheel collar to it. I did both side's and it is real easy to slide everything on then just tighten the wheel collar set screws.
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Old 08-03-2012, 12:34 PM
  #15193
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Default RE: WACO YMF

Robert, what did you do for your tail wheel. George
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Old 08-03-2012, 12:38 PM
  #15194
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Default RE: WACO YMF

Robert , what did you do for your tail wheel. George
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Old 08-03-2012, 02:15 PM
  #15195
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I built one.
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Old 08-03-2012, 02:34 PM
  #15196
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Quote:
ORIGINAL: acerc

I built one.
It looks good!

Joe
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Old 08-03-2012, 10:36 PM
  #15197
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Hi All, been some time since I last posted. Have finally got a bit of colour on the old girl, starting to get a little excited again, still lots to do but I am enjoying the build. Will post a few photos.
Regards tmac.
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Old 08-04-2012, 04:24 AM
  #15198
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Tmac48,

Beautiful work!  And it's hugh!  What kit is that?  Radial power?

Joe

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Old 08-04-2012, 05:31 AM
  #15199
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Hi Dash, It is a 1/3 scale kit from Peter Barth in Germany. Peter makes a superb kit and is a real great guy to deal with I just wish he would make a 40 percenter, maybe one day. No on the Radial, DA 150.
Regards tmac.
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Old 08-04-2012, 07:29 AM
  #15200
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It's a beautiful model. Keep us posted on your final details and maiden flight!

Joe

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