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Author Topic: Slingsby T.31 Tandem Tutor 1:20  (Read 3418 times)
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Yak 52
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« Reply #25 on: December 06, 2014, 07:14:29 PM »

The bits in the last photo are just under 12g (span is 26") but with some detail and nose weight ill be pleased if it comes out under 17g. It's not built super light because of the scale stucture, plus I just didn't try hard enough! Smiley

With regard to the indoor/outdoor thing, whilst they are both line launched gliders the actual task aerodynamically speaking and aims are quite different. If you can understand the task you can start to design (or choose the right design) specifically for the event.
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DavidJP
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« Reply #26 on: December 07, 2014, 06:04:12 AM »

Thank you Jon. Well yours does not sound exactly overweight!

I think I will probably experiment with the structure and see hat happens. There does seem scope as quite a few bits are over - spec. I will start a new topic of course. 

I am finding this small model building quite fascinating. 
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Yak 52
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« Reply #27 on: December 07, 2014, 08:58:13 AM »

It takes me a little while to 'get my eye in' with building light. Its a case of trusting that what feels really flimsy will stiffen up by the time the whole structure is complete and covered. The tutor was much stiffer than need be - so it could have been lighter!  Undecided
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« Reply #28 on: December 07, 2014, 12:10:13 PM »

missed you at Bushfields Jon!  I will miss the next one down there as we have our hanger rat comp at the Nottingham uni the next day.......

So I guess I will miss this beauty taking to the sky for the first time, and witnessing the lister glide o riser (TM) in action.... :'(

Andrew
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Russ Lister
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« Reply #29 on: December 07, 2014, 02:16:25 PM »

Are they having meetings at Nottingham again Andrew?

I thought I read something about the hanger rat comp .... or something hanger ratish at Peterborough?
I had better get moving on the launch system!

If anyone is planning on going ... and I do make this a reality .... you might want to consider building a 'superlight'!
I am trying to reduce launch stresses to enable models to be built lighter.
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Pete Fardell
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« Reply #30 on: December 07, 2014, 02:35:12 PM »

Russ, the Lister Glider-O-Riser has me intrigued. I'm hoping it features some really unorthodox technology such as giant springs, high explosives or maybe even a hamster in a treadmill winch system. When are you planning to unveil it?
« Last Edit: December 07, 2014, 02:54:53 PM by Pete Fardell » Logged
Russ Lister
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« Reply #31 on: December 07, 2014, 02:54:28 PM »

Pete,

I'll start a new thread so I don't clog up Jon's ... mmmm, hadn't thought of using a hamster ....
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« Reply #32 on: December 07, 2014, 03:05:09 PM »

Are they having meetings at Nottingham again Andrew?

Just for the Hanger rat....

It is the 4th of Jan in the evening if you are interested.

Andrew
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Russ Lister
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« Reply #33 on: December 07, 2014, 04:08:19 PM »

Yes indeed .... time and weather permitting  Smiley
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Yak 52
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« Reply #34 on: December 08, 2014, 05:09:27 AM »

missed you at Bushfields Jon!  I will miss the next one down there as we have our hanger rat comp at the Nottingham uni the next day.......

So I guess I will miss this beauty taking to the sky for the first time, and witnessing the lister glide o riser (TM) in action.... :'(

I dunno Andrew, the way things are going these days, I may just get it done for the Nats Smiley
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Yak 52
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« Reply #35 on: December 31, 2014, 08:01:55 AM »

I've been making steady progress with the Tandem Tutor as I'm hoping to fly it at our indoor meeting on Saturday.

I've finished it in a fictional Air Cadets scheme. It's nice to be freed from the burden of documentation for a change Smiley this was always meant to be a stress free build!

The roundels are printed tissue with white floral spray on the reverse for opacity. The wing registration is cut from black tissue.

The tailplane is mounted on two small pegs (thinned down toothpicks) and gives fully adjustable incidence for trimming. The wing mount is the same but will be glued. The forward pylon strut is balsa, the tissue covering makes it very rigid. As soon as it is positioned and glued I will cover the sides.

The windscreens are inset into the deck with canopy glue run into the join. It's quicker than taping them in place but not very neat. However the framing tissue covers the joins. Not super neat but as the originals are soft pop on ones I'm determined not to worry about it Smiley


Jon
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Pete Fardell
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« Reply #36 on: December 31, 2014, 10:41:07 AM »

Looking really good, Jon! You really are a master at crisp, neat tissue finishes.
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« Reply #37 on: December 31, 2014, 03:22:37 PM »

Jon,

Fabulous workmanship as always....

Andrew
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« Reply #38 on: December 31, 2014, 06:21:12 PM »

Very impressive Jon. The toothpic idea for the tailplane is neat and very practical.
Happy New Year

John
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« Reply #39 on: December 31, 2014, 09:26:18 PM »

   Super Neat Jon !
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Yak 52
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« Reply #40 on: January 01, 2015, 08:31:20 AM »

Thanks guys.

Currently jigging for rigging...
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Yak 52
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« Reply #41 on: January 01, 2015, 02:54:22 PM »

Fuselage sides are done Smiley

The lettering is printed on the red esaki.
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« Reply #42 on: January 01, 2015, 03:13:57 PM »

Really lovely Jon.
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Russ Lister
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« Reply #43 on: January 01, 2015, 06:19:19 PM »

Really looking forward to seeing this Jon ... to see it in the air and to admire the build
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Yak 52
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« Reply #44 on: January 02, 2015, 08:59:08 AM »

Thanks   Smiley

Here is the landing skid, laminated from two pieces of 1/64th ply.
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Yak 52
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« Reply #45 on: January 02, 2015, 10:42:18 AM »

Finished! AUW before nose weight is 13.9g. I'd expect a gram or two of nose weight so she's just about on target  Smiley
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Yak 52
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« Reply #46 on: January 02, 2015, 10:43:10 AM »

More...
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Pete Fardell
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« Reply #47 on: January 02, 2015, 11:00:00 AM »

Beauftiful, Jon! What a pleasure it's been to watch this coming together right from the design stage. Still can't believe how tidily you build. Should look superb in the air!

(Would you consider adding a profile pilot or two?)
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Yak 52
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« Reply #48 on: January 02, 2015, 11:11:53 AM »

Thanks Pete, yeah it really needs an insouciant cadet gorping from the cockpit  Grin
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DavidJP
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« Reply #49 on: January 02, 2015, 11:45:03 AM »

Yes, smashing.......  rather more concours d'elegance than I remember from my well spent youth. Were it me in the cockpit I doubt you would have seen much more than the top of my head!

What is the dihedral Jon?  It looks not far off scale - it is is not in fact "scale"?
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