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COX Pica WACO 1/6 scale

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Old 01-31-2007, 07:37 AM
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Default COX Pica WACO 1/6 scale

There's a thread on the 1/5th scale, so here's the 1/6 scale version.

The photos show progress from opening the box to this point in 2 evenings (7 hours) of work.

I'm looking for a suitable dummy engine and some tail brace wires.

Power is going to be a Saito .82.

Looks like the weight is headed for the high 8 pound range
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Old 01-31-2007, 08:00 AM
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Default RE: COX Pica WACO 1/6 scale

Great, I was waiting for a thread on this plane, I have one in the box and am starting to accumulate the parts and pieces for it. My on sale magnum 91 just showed up from tower yesterday. Any observations on the assembly so far?
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Old 01-31-2007, 08:05 AM
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Default RE: COX Pica WACO 1/6 scale

So far, so good.

Using 4 Hitec HS-475 servos and one 422 on throttle.

Put 2-56 jam nuts on all control rods behind the clevises and check to see that the set screws in the wheel collars are the correct size. Mine were too small and would not tighten.

Also make sure you install the N struts correctly, not like I have them in the photo.

It's a real bear to install the hinges on the elevators, because the elevator halves are already joined by a wire.

Looks like there's not much room in the servo area, for my clumsy hands, that is.

The strings in the wing panels are barely long enough to be of benefit. Tie more string to them and pull servo wires that way.

I found a dummy engine. Great Planes PT-17 radial. It'll be here next week.
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Old 02-01-2007, 07:55 AM
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Default RE: COX Pica WACO 1/6 scale

Has anyone noticed that the N struts are assembled incorrectly? They don't match the photos in the manual or the full scale plane.

If you look at the photo of my plane, the diagonal brace goes from lower rear to upper front mounting bracket.

The full scale brace goes from lower front to upper rear, almost vertically

It'll be strong enough, but it should at least what is shown in the manual, eh?
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Old 02-01-2007, 09:27 AM
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Default RE: COX Pica WACO 1/6 scale

I'm going to start on mine this weekend. Were you not able to install it as shown in the manual, or is the way you have it the only way it could be intalled?
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Old 02-01-2007, 09:41 AM
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Default RE: COX Pica WACO 1/6 scale

They will only go one way and that way is different from what is shown in the manual and on the full scale plane.

The diagonal piece is between the wrong 2 end points.
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Old 02-05-2007, 09:01 AM
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Default RE: COX Pica WACO 1/6 scale

Here it is, just about ready to go, but I still need that dummy radial, a pilot figure and a remote glow lighter, all supposed to be here this week.

So far, the weight is 8.5 pounds.
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Old 02-05-2007, 03:16 PM
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Default RE: COX Pica WACO 1/6 scale

Dick, that's a good-looking plane, I think I like the colors better than the 1/5 scale. Are the "N" struts made of wood, or metal? That's rather humorous, that they (mfg) screwed up the struts; they should have looked at the bigger one. Of course, it has its own share of non-scale features, too.

You know, Cox has really pushed the fact that this is the "old" Pica kit in ARF form, but there are many changes between the two. Stickbuilder posted a picture of one of his all framed up a while back, and when I compare things like wingtips, struts, landing gear and look at how the fuse is framed, there are as many differences as similarities, or so it seems. I can see changing some things to make the manufacturing process quicker, but in some cases the changes don't seem to make sense.

I have stripped my 1/5 ARF, and will re-cover it with Koverall, and sheet parts of it, and I am completely rebuilding the wingtips to bring them closer to scale. The prototype's are straight on the top surface all the way to the tip, and the underside curves up slightly, but the ARF's (both scales) are the other way around. This, to me, is one of the prettiest parts on the WACO, the wingtips have an elegance to them that adds to the overall beauty of the plane's lines.

I looked at the GP Stearman radial dummy, wasn't quite what I wanted. Have you looked at Aerotec's dummies? They have a 7 cylinder dummy in several sizes; kinda pricey, but they look great. Which pilot figure are you going with? I'm still looking .
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Old 02-05-2007, 03:21 PM
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Default RE: COX Pica WACO 1/6 scale

I just got the Great Planes radial, put most of the pushrods on and the cylinder on the left will be cut away to allow air to reach Saito 82's engine.

It'll be a lot better than a big empty hole in the nose!

It may need to be trimmed a bit around the perimeter but I'm hoping the rocker boxes fit in the cowl blisters.

UPDATE:

It did need to be trimmed a bit to fit. There's a lot of plastic on the workshop floor!
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Old 02-17-2007, 09:43 PM
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Default RE: COX Pica WACO 1/6 scale

Dick, don't leave us stranded out here. What's up with this ship? More pics please. Did the dummy radial fit well?
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Old 02-18-2007, 06:41 AM
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Default RE: COX Pica WACO 1/6 scale

Ken, Dick and all,

Ken brought up the question of the difference in framing between the ARF that Cox is offering, and the traditional kit. The ARF is framed for speed of construction, and I think that the objective for COX is to provide the same scale outline with a lower parts count, and lower costs. (which is as it always is to remain competitive in the business arena) Sadly, most of the time, this equates a shorter life, and a lower expectation for hard (semi) landings, and the other scrapes that our flying models are subjected to. This is neither right or wrong, just the way it is.

Hopefully these planes (both sizes) will renew the interest in these models, and we will see more people building the model from cut parts.

Dick, You need more new shirts (bright colors too)

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Old 02-18-2007, 10:03 AM
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Default RE: COX Pica WACO 1/6 scale


ORIGINAL: Stickbuilder

Ken, Dick and all,

Ken brought up the question of the difference in framing between the ARF that Cox is offering, and the traditional kit. The ARF is framed for speed of construction, and I think that the objective for COX is to provide the same scale outline with a lower parts count, and lower costs. (which is as it always is to remain competitive in the business arena) Sadly, most of the time, this equates a shorter life, and a lower expectation for hard (semi) landings, and the other scrapes that our flying models are subjected to. This is neither right or wrong, just the way it is.


Bill, AMA 4720
WACO Brotherhood #1
Absolutely correct. As I progress with my "reconstruction" of the 1/5 ARF, I will address areas where I feel that the airframe could use some beefing up and will include pics of my "improvements". These obviously will result in some weight gain; this is my 3rd ARF re-vamp and I have found that even adding another 1-1/2 to 2 pounds doesn't seriously affect the flyability of these planes (at this size). It may increase stall speed slightly, and require a faster flying speed, but handling is not adversely changed; I think a heavier plane "feels" better, but that's my opinion. I definitely see that the landing gear attach area needs some improvement, especially since I intend to attach floats as well as the standard wheel gear to mine. It's a while yet before I get to that part, though. Stay tuned.
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Old 02-18-2007, 12:23 PM
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Default RE: COX Pica WACO 1/6 scale

Ken,

I don't think that you are going to get this (or any) Biplane to really fly faster. There is just too much parasitic drag involved. You may find that a little more throttle is required on final, but I don't think that your speed will actually increase, but you will probably have to fly it a little further in on landing. The WACO (at least the 1/5th scale) really does drop when it quits flying. Makes an expensive sound when it hits too. [:@][:@][:@]

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Old 02-18-2007, 07:24 PM
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Default RE: COX Pica WACO 1/6 scale

I guess I meant you'd have to maintain a higher power level, yeah, it's no rocket. The wing loading on the ARF is pretty light, and it can gain some weight without making it a brick. My Sportsman 60 size UPF flies very nicely at a good pound heavier than it started at, but man, if the engine quits, it has the glide ratio of a cinder block. Only happened once, thankfully I was on final anyway.
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Old 02-18-2007, 09:25 PM
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Default RE: COX Pica WACO 1/6 scale

Dick,

Looks like COX missed on this one too. It's not a YMF, it's a UMF. The cowl on this one is for the Continental engine just like the 1/5th scale job. Probably doesn't make any difference to the guys who will fly it, but ....oh well.

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Old 02-19-2007, 07:27 AM
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Default RE: COX Pica WACO 1/6 scale

Dick,

This model really does need tail bracing. Take it from someone who knows. I know that Gordon wants you to not make any modifications to the model, but I think that you need it here.

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Old 02-19-2007, 07:28 AM
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Default RE: COX Pica WACO 1/6 scale

For looks or for longevity?
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Old 02-19-2007, 12:17 PM
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Default RE: COX Pica WACO 1/6 scale

Longevity. The H-stab on the WACO is fairly weak and may depart without the bracing. If nothing else, maybe thread some kevlar string through the H-stab, v-stab and the bottom of the plane, and touch the framing with some thin C/A where the string goes through.

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Old 02-19-2007, 12:18 PM
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Default RE: COX Pica WACO 1/6 scale

Good point. I'll add it this week before test flying.
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Old 02-19-2007, 06:54 PM
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Default RE: COX Pica WACO 1/6 scale

Dick,

You won't be sorry that you did. You don't really need to add all that much in the way of bracing, just make it so it will catch the surface before it can move. That is all the strength that you need to add. Anything more is just looks. Kevlar string is great for a small plane like this, I use more stern stuff for the bigger one.

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Old 02-19-2007, 10:04 PM
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Default RE: COX Pica WACO 1/6 scale

Stuck my wings together tonight, man this is a nice kit, everything so far fits well.
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Old 03-07-2007, 09:22 AM
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Default RE: COX Pica WACO 1/6 scale

Dick, have you flown your WACO yet? How did your weight and balance work out with the Saito?
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Old 03-07-2007, 09:30 AM
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Default RE: COX Pica WACO 1/6 scale

Weight and balance came out just fine with no extra weight needed. Only battery and receiver relocation.

Total weight is just short of 9 pounds.

Not flown let (Perry Swap Shop last weekend, family reunion this weekend) but soon after that.
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Old 03-07-2007, 06:59 PM
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Default RE: COX Pica WACO 1/6 scale


ORIGINAL: pettit



Not flown yet but soon after that.
If this dang wind don't quit soon, tie a string to it and make it into a kite
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Old 03-08-2007, 11:25 AM
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Default RE: COX Pica WACO 1/6 scale

This dummy radial, although very complete, does not look anywhere near the right scale, need one for a much smaller cowl. Probably stick one of the two i have on my Balsa usa nieuport 11, looks more like the right size even though it's not a leRhone radial.


ORIGINAL: pettit

I just got the Great Planes radial, put most of the pushrods on and the cylinder on the left will be cut away to allow air to reach Saito 82's engine.

It'll be a lot better than a big empty hole in the nose!

It may need to be trimmed a bit around the perimeter but I'm hoping the rocker boxes fit in the cowl blisters.

UPDATE:

It did need to be trimmed a bit to fit. There's a lot of plastic on the workshop floor!
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