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Grunau Baby 2B - Island Models

Started by tadleysoarer, January 07, 2012, 22:10:23 pm

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tadleysoarer

Less caps than I thought, 140 in total.

Done some more only 81 to go :)

Question on covering.

1) Do I need balsaloc (or watered down white PVA) on  the undercambered cap strips so covering sticks nicely and I do not get a flat section when I shrink the covering.

2) I am planning red fuz, red on the wing sheeting and white at the rear over the cap strips. Is it possible to get translucent white as having the wing structure more visible than using Easycoat which I have 10 metres of would be nice if cost effective.

Tad
Scale soarer's do it quietly in style!

tadleysoarer

Cap strips all done on the wings.

Added some trailing edge sheeting to the ailerons.

[attach=1]

Only 48 aileron cap strips to go :)

Tad
Scale soarer's do it quietly in style!

tadleysoarer

At last capped all the strips for the ailerons.

[attach=1]

Thus completing the ailerons. Need a sand sown before covering.

Need to add the airbrake tops and the strut mountings and the wing will be done.

Slow but sure progress.

Tad

Scale soarer's do it quietly in style!

tadleysoarer

Added the root leading edge of one of the wings. Will need shaping later.

[attach=1]

Decided on colour scheme. Red Fuz, White wings (means I can use electrical tape to secure the wings if it is required. Fin will be red white and blue.

Here is a link to an article.

http://www.glidingmagazine.com/FeatureArticle.asp?id=311

Tad
Scale soarer's do it quietly in style!

tadleysoarer

Well a little bit here and there and the frame is nearly ready for covering!

Shaped and added the nose!

[attach=1]

Only bits to do no are struts, skid and airbrake tops which I will do after covering.

Tad
Scale soarer's do it quietly in style!

tadleysoarer

Sanded her down, then did dry assembly.

[attach=1]

Looks nice. Slight problem she is very nose heavy. Too much lead in, without the battery she balances nicely. Guess covering will add some weight at the rear,

Tad
Scale soarer's do it quietly in style!

selleri

Not sure you'll see that much difference unless you cover in lead!  :D

Looking good! My Ka-3 might be heading to the building table late in October, need to make a longer table than the one I currently have.
Sverrir  - Icelandic Volcano Yeti - RCMF Tech Team

tadleysoarer

I will cover all appart from the nose and see how she balances and maybe drill out some lead from the nose.

[attach=1]

Covered the rudder in White Easycoat. Pleased that it is semi translucent so the ribs can be seen. Oh well on with the ironing :)

Selleri, is your KA3 an Island Models? 1/3 or 1/4 scale?

KA3 is a nice model, I built one form Charlesworth plan.

Tad
Scale soarer's do it quietly in style!

selleri

Sverrir  - Icelandic Volcano Yeti - RCMF Tech Team

tadleysoarer

September 30, 2012, 14:06:37 pm #129 Last Edit: September 30, 2012, 14:54:54 pm by tadleysoarer
I thought of getting the 1/3 KA3, but I have always admired the shape of the GB2. I started scratch building one years ago. These short kits from Fred with excellent plans mean none of the tedious works (ribs and formers) need to be done.

Just added a removeable cover for the centre section of the wings.

[attach=1]

Wings will be held on by white electrical tape though with stiff wing joiners and struts not sure it is needed,

Tad
Scale soarer's do it quietly in style!

Pennbrit

Looking good.
It looks like we are pretty much at the same level with our build.
I just covered the rudder before coming on here.  ;D
Looking forward to seeing video of yours and getting mine in the air.

Ray  :af
When in Dought go flying.
Raptor 50 Titan: Raptor 50 Titan in an MD530 body:
Raptor E550: Sceadu Evo

tadleysoarer

Very similar levels in our build, my tailplane and elevator are now covered. Unfortunately it is raining and the uncovered bits are in the garage.

Tad
Scale soarer's do it quietly in style!

tadleysoarer

Fuselage now covered appart from nose, nose will need drilling into to remove lead.

Starboard wing covered, tailplane, elevator and rudder covered.

Ironing takes a while !

Tad
Scale soarer's do it quietly in style!

tadleysoarer

October 24, 2012, 20:13:52 pm #133 Last Edit: October 24, 2012, 20:17:49 pm by tadleysoarer
What is wrong with this picture?

[attach=1]

Answer the elevator control rod is outside the fuselage, Doh!

I am doing some work on the airbrakes so took the sockets and servos out of the fuselage to make it easier to connect the wings up. Later went to put the fuselage away and heard this rattling and noticed the elevator control r0d had come out.

Oh well now to put it back in. Think it unlikely I can drop it carefully in and hope the brass lines up exactly with the brass socket at the rear so will have to cut a hole in the fuz at the rear.

Grrrrrrrrr, rushing too much.

Tad
Scale soarer's do it quietly in style!

tadleysoarer

Good thing I had photos of the build. Cut a hole in the fuselage and managed to get the elevator control rod back where it belongs.

[attach=1]

Paper clip put through the hole the elevator pin goes through so it will stay put now.

Need to fix the hole which is straightforward. Hopefully will not have weakened the fuselage to much,

Tad
Scale soarer's do it quietly in style!

tadleysoarer

Well table set, veg prepared girls are watching Christmas musicals, hmm what shall I do? An hour spent sanding wing struts down :)

Tad
Scale soarer's do it quietly in style!

Anthony

When and where will the maiden be, Tad. ?  Ant.

tadleysoarer

2013 plan for the maiden, Kingsclere downs, :)

Tad
Scale soarer's do it quietly in style!

tadleysoarer

Wing struts all done. Not very strong though I thing they are not structural in the model.

I have a question about the aileron gaps.

I know the gap is scale but looking at full size pictures the gap is sealed. There seem to be two ways.

U way where there seems to be tape adhered to top of wing and aileron.

Z Where tape is on top of wing and under aileron.

[attachimg=1]

Which is better or is it not worth the hassle?

Tad
Scale soarer's do it quietly in style!

selleri

I wouldn't bother, it's such a high drag airframe but if you want go for an U on the underside, much less visible and does the same thing. Keep the covering in the gap, no need to take it to the horizontal surface.
Sverrir  - Icelandic Volcano Yeti - RCMF Tech Team

tadleysoarer

Thanks I think not bothering is less work.

Can always add later if I decide to.

Tad
Scale soarer's do it quietly in style!

tadleysoarer

Oh well finally finished the model :)

Had t drill some lead out of the nose and replace a broken hinge on a strut.

Plan early start tomorrow as a NE is forecast.

Here are two pictures.

[attachimg=1]

[attachimg=2]

Tad
Scale soarer's do it quietly in style!

selleri

Congrats and good luck on the maiden! 

I'm still smiling from the maiden on my Ka3.   :af
Sverrir  - Icelandic Volcano Yeti - RCMF Tech Team

tadleysoarer

Sadly I am not smiling after my maiden.

Long story short, heavy arrival on top of slope after an eventful first flight where I never felt completely in control. Both wings wrecked and the pylon on the fuz had come away. Fuz looks OK, Need new wings and some work on the pylon part of fuz.

Still smiling from maiden of my Quark.

Tad
Scale soarer's do it quietly in style!

Pennbrit

Sorry to hear about your baby having problems.
I had my maiden flight with mine last week. Superb flight. Loved it.

Ray.
When in Dought go flying.
Raptor 50 Titan: Raptor 50 Titan in an MD530 body:
Raptor E550: Sceadu Evo

tadleysoarer

I saw your maiden and it looked good, maybe I should have had more lift. Oh welI I enjoy building so some more opportunity for me.

Tad
Scale soarer's do it quietly in style!

selleri

Ouch, two time is the charm...  :af

Good to hear about the Quark, I've got a kit that I'll start on soon.
Sverrir  - Icelandic Volcano Yeti - RCMF Tech Team

tadleysoarer

On reflection I think the lift was not adequate for the Baby. Also looks like a big repair job, so on with the Habicht I started in 2005.

Tad
Scale soarer's do it quietly in style!

Jas

Hello - Looking good, i am working on a 1:3rd scale Grunua Baby on my website  ;D

JG

Thanks JG