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Chris's Mini Tyro

Hopefully a quick build

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Mini Tyro

Mini Tyro

The plan build article

Chris Bott - Moderator21/10/2013 21:49:43
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A Mini Tyro wood pack arrived this morning, so:

Here we go on mine.

Having spent quite a bit of tim cutting ply formers for this:-

lanc6.jpg

it's a nice pleasant change to have some perfect looking laser cut parts:-

Here's all the Mini Tyro bits straight out of the packet.

tyro1.jpg

For this type of construction I tend to cut the shear webs beforehand, this speeds up assembly, spaces the ribs well and jigs them nice and upright.

tyro2.jpg

Of course having said that, they weren't quite the right size.

tyro3.jpg

here's the wing part way through.

tyro4.jpg

and a couple done. Easy peasey this laser cut stuff!

tyro5.jpg

Robin Kearney21/10/2013 22:12:36
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I misread the first post Chris, and found myself thinking 'its been a while but I don't remember the fuselage of my Mini Tyro looking like that' took a few moments to realise that was your lanc smiley

r

Chris Bott - Moderator21/10/2013 22:24:11
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Gotcha there Robin

A quick sand and a trial fit and it's looking quite wing-ish.

tyro6.jpg

Shame Dad's taxi is required now, or the wing tips would go on at least.

Edited By Chris Bott - Moderator on 21/10/2013 22:24:30

Robin Kearney21/10/2013 22:32:28
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Good progress for an evening! I forgot to ask, what will you be powering it with?

r

Chris Bott - Moderator21/10/2013 23:38:56
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Power is going to be this Robin.

tyro7.jpg

Assuming it passes it's ground running tests once a 3BA nut arrives for a propnut.

Danny Fenton21/10/2013 23:55:40
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Looking good Chris, excellent progress, if you can get this finished in the morning that would be good then we can get back to that opening shot smile p oooo the rivets they are calling......

Cheers

Danny

TheFlyingCrust21/10/2013 23:57:35
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Never heard of that little motor. It looks awfully similar to the DC Merlin I have in my MT. What capacity is it?

Ian

Chris Bott - Moderator22/10/2013 09:00:03
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Hi Danny. Rivets? there are no rivets on a 1/12 scale model

Hi Rentman, as far as I know it is indeed a Merlin.

If Geoff Smith (Wonky Webit) ever looks in, this is the model your engine is going in.

Looks like this to me anyway.


TheFlyingCrust22/10/2013 09:38:34
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Ah, ok. Should be perfect. A little more power than the Mills so I have a 7x4 on mine. Still gallops along.

£2.37p. I must buy a couple whilst in stock face 22

Ian

Chris Bott - Moderator22/10/2013 21:37:49
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Tonight - things slowed down while some nice satisfying carving was carried out. Razor saw first, then razor plane, and finally sanding blocks and loose sandpaper.

tyro8.jpg

After all shaping was complete, the wings were joined and the centre capping attached.

tyro9.jpg

tyro10.jpg

Time for a tidy up I think.

Robin Kearney22/10/2013 21:42:41
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Nice work Chris, looking good.

That is a nice looking little motor. I owned one as a kid and I'm still not quite over my dad throwing it in a skip along with the airframe it was attached too!

Have you chosen a colour scheme yet?

r.

Concorde Speedbird22/10/2013 21:50:29
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Ah, the Merlin, you'll need 4 more for the Lancaster Oh wrong one...!

Tyro's looking great, a great design. That Lancaster (if it is that) is interesting, is it the TN 72" one? Any build blog?

CS

Chris Bott - Moderator22/10/2013 22:18:52
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Merlins for the Lanc - brilliant, why didn't I think of that ?

Yes it is indeed a Lanc, but it's based on a John Ranson and Trevor Stennard design. I've had the plan for years and it will be altered from the B1 Special version to one of the aircraft my father crewed as a member of 83 Sqdn. R5669 OL-E or R5913 OL-G
The model is 2.5M span, should come in under 7kg and be a good practical size.
As for a build thread, I probably will, but it's going to be a slow burn project with other things done in between, so if I do a thread, posts won't be very often.

Edited By Chris Bott - Moderator on 22/10/2013 22:22:55

Chris Bott - Moderator22/10/2013 22:32:08
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I'm not quite settled on a colour scheme yet Robin, but do quite favour the Orange and Black standard Boddington scheme.

I don't think I'll replicate this first Tyro I had, White fus and Metallic Gold Solarfilm wings if I remember correctly.

Chris Bott - Moderator01/11/2013 20:54:01
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I grabbed a little more workshop time this evening. I do really enjoy some of Boddo's old techniques.

First a photocopy of the plan, then the areas where glue was to be applied had sellotape stuck over them to stop the cyano sticking to the paper.

Here the tailplane was framed up with all the 3mm balsa that makes up it's core.
It was given a nice flat sand with the big block at this point to even out and slight unevenness in the surfaces.

tyro11.jpg

The photocopy was cut so the end profile could be transferred to the wood, and the ends were shaped.
tyro12.jpg

Next, more 3mm balsa was glued to one side.
tyro13.jpg

and the same on the other side.
tyro14.jpg

Finally the large sanding block really came into it's own, for sanding the whole thing to profile.
Making a nice light rigid structure.
tyro15.jpg

Biggles' Elder Brother - Moderator01/11/2013 21:06:04
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Nice progress Chris and looking good.

BEB

Tony Bennett01/11/2013 21:11:21
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love the tail construction method.

Chris Bott - Moderator01/11/2013 21:54:18
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I agree Tony, that Mr Boddington seemed to know a thing or two!

A couple of small laser cut parts and a few sticks glued together, and we have a fin ready to sand.

tyro16.jpg

Tony Bennett01/11/2013 21:56:34
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nice

Tim Hooper01/11/2013 22:09:21
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That looks nice, Chris!

tim

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