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Author Topic: Skyleada WACO CG-13 Indoor scale glider  (Read 1785 times)
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Rich Moore
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« on: September 26, 2013, 04:19:16 PM »

I thought I'd start this thread to get me going again...nearly put it in the 'Indoor glider' section, but it is 'Scale, Indoor' as well, so it might as well be here.

I wanted to join in with the new indoor scale glider movement that Andy Sephton has started, so I downloaded this plan from 'Mikes flying scale pages'.

Lightweight construction (1/16" sq) is a bit fiddly but I haven't had any major tantrums yet. Construction is simple, so shouldn't take too much time (I'm working on multiple projects again)

I have been developing a glider winch for indoor flying, which I'll test on this model.
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Skyleada WACO CG-13 Indoor scale glider
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Yak 52
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« Reply #1 on: September 26, 2013, 04:41:24 PM »

Hi Rich, I'm in  Cheesy

I've been drawing a 24" glider soon(ish?) to be revealed. Give us loads of detail old chap? Esp the winch...
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Rich Moore
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« Reply #2 on: September 28, 2013, 03:08:38 PM »

Now the glue has done its thing with the fuselage, I have been able to remove it from the building board, allowing me to get started on the wings.

Nothing unusual but just for the record:
I cut out two thin ply templates and cut out the ribs using the 'sandwich method'. My first deviation from the plan is to use 1/32" balsa for the ribs instead of 1/16". I was tempted to add an upper spar as well as the single 1/16"x1/8" spar shown on the plan. I relented but selected stiff-ish balsa for the wing spar and made it a wee bit deeper. More like 5/32" than 1/8". Hopefully this will prevent the possibility of elliptical dihedral . I am tempted to add spliced secondary ribs between the main ribs. This would improve the look of the wings but add the weight I've saved by going for thinner ribs. We do have to make tough decisions sometimes...

The only other deviations/ modifications I anticipate at the moment is the addition of some sheet balsa on the underside of the fuselage to enable the attachment of a tow hook. Some experimentation/ trial and error will be required to get this in the right position. I expect it will have to be slightly to one side to keep the model straight under tow. Obviously the model will be trimmed to turn, once free.
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Re: Skyleada WACO CG-13 Indoor scale glider
Re: Skyleada WACO CG-13 Indoor scale glider
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Russ Lister
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« Reply #3 on: September 28, 2013, 03:16:21 PM »

Quote
I wanted to join in with the new indoor scale glider movement that Andy Sephton has started
Sounds like an aeromodelling equivalent of 'The Angry Young Men'  Roll Eyes

Looking forward to seeing it take shape Rich .... I have a feeling that I have seen one before at Impington .... maybe Chris Strachan?
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Rich Moore
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« Reply #4 on: September 29, 2013, 03:13:14 PM »

So, I got the main bits done this weekend.

It is quite a delicate structure which will test my hand control when it comes to sanding. As can be seen in the photos I added some secondary ribs to the wings. The added weight is minimal and I think it aesthetically worth the bother. Also, I cambered the wing tips over the wing spar rather than build them flat on the plan. I am not sure this is as intended by the plan/ kit, but looks much better.

Attached files Thumbnail(s):
Re: Skyleada WACO CG-13 Indoor scale glider
Re: Skyleada WACO CG-13 Indoor scale glider
Re: Skyleada WACO CG-13 Indoor scale glider
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« Reply #5 on: September 29, 2013, 05:20:31 PM »

Looking good Rich .... I like the alternating secondary ribs.
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Rich Moore
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« Reply #6 on: October 04, 2013, 04:26:12 PM »

Sanded the structure without any trauma. Painted the cockpit area prior to glazing. Added copious amounts of fine detail in the cockpit including two fully detailed pilots. And started messing around with tissue paper...
Attached files Thumbnail(s):
Re: Skyleada WACO CG-13 Indoor scale glider
Re: Skyleada WACO CG-13 Indoor scale glider
Re: Skyleada WACO CG-13 Indoor scale glider
Re: Skyleada WACO CG-13 Indoor scale glider
Re: Skyleada WACO CG-13 Indoor scale glider
Re: Skyleada WACO CG-13 Indoor scale glider
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Rich Moore
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« Reply #7 on: October 04, 2013, 04:28:26 PM »

Then I removed the blue bits and cut new ones, and stuck them on. Hopefully it'll look vaguely symmetrical when dry...
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« Reply #8 on: October 04, 2013, 05:48:46 PM »

Rich:

Looks great! When do you plan on developing a indoor wench.  Thanks, co2nut
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« Reply #9 on: October 04, 2013, 06:16:01 PM »

Quote
developing a indoor wench

The mind boggles Roll Eyes
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« Reply #10 on: October 04, 2013, 06:48:03 PM »

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developing a indoor wench

The mind boggles Roll Eyes

Do I qualify? Wink
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Art356A
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« Reply #11 on: October 04, 2013, 11:01:44 PM »


Do I qualify? Wink

Eminently.
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Rich Moore
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« Reply #12 on: October 05, 2013, 04:18:20 AM »

The Airforce roundel has come out much better second time around. I really must play with printed tissue soon but 'physical' techniques will suffice for this one. I can plod on in my 'bat cave' with a sharp blade quite happily cutting silly little pieces out - I might miss that if I print everything. I'll overlay strips of tissue for the D-day stripes.

co2nut - My indoor wench is quite well-developed already (in indoor' general discussion' somewhere). I'm waiting for a quiet moment in the sports hall to try it out. I've got a basic stick model to try it on - taken the prop hanger off, added a blob of plasticene and added a paper clip tow hook. It is a little light for winching, so I'll have to be gentle. I suspect it'll take some practice not to fold the wings. It may not be an ideal test model as it might struggle to lift the weight of the line but it'll demonstrate to me the potential. As I'm writing this I'm thinking I should build a more appropriate glider to test it on. That'll have to be the WACO then. Someone somewhere said that small models are more sensitive on a line, which makes sense. I wish I'd gone for a bigger model but too late now...
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Art356A
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« Reply #13 on: October 05, 2013, 09:41:15 AM »

What's the normal increase ratio for these "wenches" (I suppose that's British spelling for winch)? Like typically, what would the crankthrow be, and how much line would be drawn in per revolution of the crank? Or is the class too new for preferences to have developed?

a.
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Dave Andreski
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« Reply #14 on: October 05, 2013, 11:00:33 AM »

Art,
Thinking of a 'chain gang' winch?
Dave
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Art356A
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« Reply #15 on: October 05, 2013, 11:26:43 AM »

I dunno. Just thinkin'. Probably too much time on my hands.

The whole thing with the winder is being able to feel the motor's feedback through the handle. Not a factor here, is it?

a.
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Dave Andreski
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« Reply #16 on: October 05, 2013, 11:31:08 AM »

I dunno. Just thinkin'. Probably too much time on my hands.

The whole thing with the winder is being able to feel the motor's feedback through the handle. Not a factor here, is it?

a.

I really wouldn't know but I could sense that you were 'thinking'.
Dave
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Pit
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« Reply #17 on: October 05, 2013, 02:48:13 PM »

One the subject of a lightweight tow-line, a guy showed up at the field yesterday with one of the new ParkZone (Horizon Hobbies) ASK-21 rc micro-sailplanes (~30" span).  He got it AIR-towed by another PZ electric using a length of medium weight CARPET thread!  The glider snagged grass a number of times on takeoff (ground start) and the thread held up fine, is very light and is relatively easy to find.  Should be just the ticket for the winch.

Pete
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Rich Moore
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« Reply #18 on: October 05, 2013, 03:50:31 PM »

Thanks for the suggestion Pit. I've got some thin kite line that I was going to try first. As kite line, it is designed to be light, but it is also designed to be very strong. Stronger than our application requires, so carpet thread would probably be more sensible. It'll have a greater tendency to tangle, I imagine, but we'll see. It also comes in a wide variety of colours...
« Last Edit: October 05, 2013, 04:08:44 PM by Fat Dragon » Logged

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Rich Moore
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« Reply #19 on: October 06, 2013, 03:16:15 PM »

An ickle bit of progress...
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Andy Sephton
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« Reply #20 on: October 08, 2013, 01:37:32 PM »

That's looking very nice FD, I'll look forward to seeing it in the air!

Winches: Peter Smart's is based on a 1960s outdoor FF Glider winch that was used to quickly reel in the towline after launch. It's 8:1 ratio with a reel diameter of about 4 inches. They're now unavailable, but Mike Woodhouse supplies a similar modern version of which I have procured an example and I've also invested in a 4.5:1 fishing reel on ebay for less than £5.00. I'll let you know how I get on with them on my Glider thread after the Shawbury meeting on 27th Oct. 
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Rich Moore
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« Reply #21 on: October 08, 2013, 04:31:44 PM »

Started covering fuselage this evening. Fuse has developed a bit of twist. Should be less noticeable when covered and I'm not eye-balling down the length of it! I usually cut longerons from the same piece of wood, but I had some 1/16" square  sticking out of a jar which I used at the time. They were obviously not quite of equal stiffness...note to self: be bothered to 'balance' stiffness of longerons in future...

I keep mentioning my winch and how I'm going to test it. Hopefully tomorrow...

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« Reply #22 on: October 12, 2013, 08:18:11 PM »

Nice covering job on the wing... looks great!

Tom
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DavidJP
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« Reply #23 on: December 16, 2013, 05:39:27 AM »

How are things going here?
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Rich Moore
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« Reply #24 on: April 09, 2014, 04:22:52 PM »

Hi - I've not touched this for a while. I hope to assemble this by the end of play Friday night, maybe Saturday morning. Mostly there, just needs tissue on tail surfaces. I may not (read that as 'won't') finish the markings before the glider comp at Nottingham - they'll have to wait.
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