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Build Thread- WACO SRE From Manzano

Old 03-01-2009, 08:33 PM
  #151  
hoffboy
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Default Silkspan over doculam

Not trying to hijack this thread or anything, but we were discussing silkspan over doculam earlier. Here's my finished EVA. Open bays have .5 mil doculam with one layer of silkspan and two coats of Minwax Polycrylic (WBPU). D-box and fuse have one layer of just silkspan (no mylar) and three coats of WBPU. All WBPU coats were lightly sanded then damp clothed. Somewhere between the second and third coat seems to be where the finish really "takes" and looks like a scale fabric covering. I'm going to skip the mylar on my next plane and try two layers of silkspan. I'm told that's nearly as strong as using mylar, but you don't have to fool around with hot irons and shrinking.

More info on the plane is at my RCG Blog (winces) http://www.rcgroups.com/forums/member.php?u=197445
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Old 03-12-2009, 03:01 AM
  #152  
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Hi Ron, just checking in to see how your doing on your Waco. hope all is well.

Glenn
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Old 03-12-2009, 10:54 AM
  #153  
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Default Took A Break

Hi Matt, Great job on the EVA, looks good!
Hello Glenn, I'm ready to get back to work on the Waco, took a bit of time off to catch up on some non-modeling stuff.
I did try your suggestion for the side windows, used CA around the edges, no fogging and it came out pretty well. I also used thin striping tape to frame the edges. Will post some photos soon.
Thanks,
Ron
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Old 03-12-2009, 05:32 PM
  #154  
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Glad to here it worked for ya Ron, looking forward to some pic's, I'm just about at the window stage myself.

Glenn
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Old 03-12-2009, 05:38 PM
  #155  
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I too can't wait to see updated pictures, Ron. But we all need a break every now and then.
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Old 03-12-2009, 10:39 PM
  #156  
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Nope, no breaks allowed in build threads. More pictures please.
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Old 03-13-2009, 12:35 AM
  #157  
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Default OK, OK!

LOL, Tom!
Boy, aren't you impatient! Just kidding, I've been away from this build too long. Had some "issues" at work and it took all my spare time and then some, to get it straightened out. After a couple of 60+ hour weeks I was only able to squeeze in an hour here and there.
Anyway, here's the side windows installed. The Litespan needs a bit of re-sticking around the window frames, I haven't applied a top coat of Minwax to the fuselage yet. I'm also going to frame the front windshield after I install it.
I used 1/8" metallic black striping tape, tried the home-made iron-on type but it didn't work. This is the 4th set of side windows I've cut, and hopefully the last!
I'm back to 40 hour work weeks, now back to work on the Waco!
Ron
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Old 03-13-2009, 04:58 PM
  #158  
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windows are coming along nice Ron, Is that the testors trim tape that comes in a bunch of differant colors your using ?

60 hour's , I would love to work 60 hour's, more money for plane stuff

Glenn
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Old 03-13-2009, 06:19 PM
  #159  
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Default Window Tape

Hi Glenn,
I believe it's Testors tape, it's "Pin Striping" tape from the hobby shop.
I should be covering the wings and gluing them to the fuselage this weekend. I've been hoping for a long stretch of build time to do this uninterrupted.
Some of the steps are hard to do in small bits of time.
Yes, the paychecks from the long weeks are great, but a little R + R is overdue!
Ron
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Old 03-14-2009, 06:51 PM
  #160  
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Default Bottom Wing

Here's the bottom wing attachment to the fuse, used Titebond for this. As mentioned earlier, I lengthened the dowels one rib bay and carried them through the fuselage, no dihedral on the bottom wing.
After checking the joint I will cover the wing, then add the top wing.
Ron
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Old 03-15-2009, 02:38 AM
  #161  
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Default Bottom Wing Covering

Here's the left bottom wing covering, pretty much step-by-step. Took about 20 minutes, after cutting the pieces to size.
Ron
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Old 03-15-2009, 03:00 AM
  #162  
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Default Bottom Wing Covered

Finished the right wing, now it's done. The covering hasn't been shrunk yet, I will now go around with a slightly hotter iron and seal all the edges.
Ron
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Old 03-16-2009, 03:20 AM
  #163  
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Default Lower Wing Shrunk, Start Upper Wing

Here's photos of the lower wing after shrinking the covering. No topcoat yet.
Then I began covering the top wing. I stuck the covering around the aileron, then applied Minwax to the rest of the framework. Without using the iron, I pulled the covering as tight as possible. Then I sealed the edges with the iron.
I am going to mount the upper wing to the fuselage without covering the top surface (yet). The reason is I want to get a good glue joint on the interplane struts from the inside. Also, since I'll be sheeting the top of the fuselage between the wing panels, I'd rather not have the upper panel (top) covered while I sand the sheeting to match the root ribs.
Ron
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Old 03-16-2009, 01:47 PM
  #164  
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Looks like you're on the home stretch Ron.
Looking good, as usual.
Paul
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Old 03-17-2009, 10:40 AM
  #165  
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Default The Home Stretch?

Thanks, Paul!
Yes, I'm near the end, the covering is going pretty fast as I get the hang of the Minwax method. But I wanted to be done by "Spring" and it's only days away!
Ron
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Old 03-17-2009, 01:38 PM
  #166  
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Looking pretty good there Ron, I'm looking forward to the warmer weather as well.

Glenn
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Old 03-21-2009, 02:57 PM
  #167  
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Default Upper Wing Attachment

Hi Glenn, thanks, Winter's over!
Here's the upper (right) wing attachment. First I glued the short stub 1/8" dowels into the wing root with CA. Then I used Titebond on the face of the root rib and spar, pulled the servo lead into position, then slid the wing into place. Before the glue started setting up, I maneuvered the outboard strut into position and used two rubber bands to hold the wings in position. The spring clamps are to keep the incidence correct and the spar insert flush with the dihedral brace. I also covered the landing gear fairings and the lower nose earlier, this is a late post.
Ron
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Old 03-21-2009, 03:17 PM
  #168  
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Looking great Ron! Gonna be a keeper!
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Old 03-21-2009, 06:57 PM
  #169  
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Default Left Upper Wing Attached

Thanks, Kev! Yes, I'm hoping it will be around a long time. It's been a slow build, mainly because of my lack of time. If I could work on this model every night, it would have been done in a month.
Here's the left upper wing joint, everything fit properly, no problem.
Next I'll cover the upper wing surface and begin fitting the ESC, battery tray and any other "innards" before adding front windshield.
Ron
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Old 03-21-2009, 08:17 PM
  #170  
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I understand not having enough time. My Cub has sat untouched for over a week, being so busy with home stuff and gearing up for baseball/softball season starting. I am sure it's getting lonely all by itself in the shop.....LOL
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Old 03-22-2009, 03:11 PM
  #171  
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Originally Posted by Sky Sharkster View Post
Thanks, Kev! Yes, I'm hoping it will be around a long time. It's been a slow build, mainly because of my lack of time. If I could work on this model every night, it would have been done in a month.
Here's the left upper wing joint, everything fit properly, no problem.
Next I'll cover the upper wing surface and begin fitting the ESC, battery tray and any other "innards" before adding front windshield.
Ron

Really coming together Ron, and another great idea with those rubber bands.

Well the Day's are getting longer, but now it's time for yard work

Glenn
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Old 03-23-2009, 11:52 AM
  #172  
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Default Rx, ESC, Center Sheeting

Hi Glenn + Kev,
Had a few hours to build this weekend, so I soldered the bullet connectors onto a C.C. T-Bird 18 ESC.
Also applied a thin coat of epoxy to the servo tray for the Rx mounting velcro. Put some epoxy on the top of the landing gear mounts for battery mounting, also.
Partially sheeted the top of the fuselage/wing center section.
Weight of airframe, motor, ESC, Rx, all servos, cowl, everything covered except top of upper wings;
16.1 ounces, 453 grams.
Here's photos;
Ron
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Old 03-27-2009, 09:58 PM
  #173  
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Default Cowling Mount

After a morning of shovelling snow, got a little time in on the build. The plans show a "Split" cowl, the bottom half removeable for motor maintainance.
I decided to make the entire cowl removeable. No split.
First I whittled off the flash (flange?) from the back of the cowl. Then I put the 2nd ply ring inside the cowl to hold its' shape while I sanded the back side flat. Just rotated the cowl on a flat piece of #200 sandpaper.
Then I used the ply ring as a template to make circular doublers from 1/4" balsa scrap.
Rubber bands hold my "Alignment Jig" to the nose.
CA on the back of the doubler, glue it in place.
I'll use very small machine screws (from the RR section of Hobby Shop) to attach the cowl, screwing into the doublers. After lining everything up and drilling pilot holes for the screws, a shot of CA will harden the holes in the balsa.
I'll try it with 2 doublers, but just in case, I cut 4; may add top + bottom ones later.
Ron
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Old 03-28-2009, 05:16 AM
  #174  
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looking sharp Ron, Yikes ,snow shoveling?? seems there's always one more storm after spring has arrived.

Glenn
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Old 03-28-2009, 01:55 PM
  #175  
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Looks good Ron. Have you considered a couple of dowels to align the cowl and a couple of magnets to hold it?

Paul
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