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Tim's Skywriter Build

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Lucas Hofman28/02/2017 08:57:20
596 forum posts
316 photos

Clever! I will keep that in mind. Lucas

Tim Ballinger03/03/2017 20:08:13
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540 forum posts
227 photos

Bit further....img_0917.jpg

Tim Ballinger04/03/2017 08:23:22
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540 forum posts
227 photos

And somewhere to stand the fin before it gets covered.

img_0918.jpg

john stones 104/03/2017 17:33:41
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10487 forum posts
1475 photos

Coming on nicely Tim, stringers look good on yours, i've struggled a bit with the notches on mine, i'll have some filing to do on em. crook

John

Tim Ballinger04/03/2017 18:38:38
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540 forum posts
227 photos

Thank you John but I did of course have the ready cut formers from slec which I have to say were spot on.

Tim

Lucas Hofman05/03/2017 06:52:58
596 forum posts
316 photos

How will you do the fairing Tim? With the Ballerina I made a dummy elevator and fin bit, glued together on the bench (to get them 90 degrees). These were covered with plastic tape that stayed in place until after covering the fuse.

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img_2771 (small).jpg

Edited By Lucas Hofman on 05/03/2017 06:54:52

Tim Ballinger05/03/2017 09:07:30
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540 forum posts
227 photos

Thanks for the thought Lucas, I was just going to shape it with just a support under the rear but filling in the gaps is a neat way of keeping it all solid and shapely.

Tim

Tim Ballinger05/03/2017 09:09:21
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540 forum posts
227 photos

Lucas, Is the infill between the stringers part of the plan or your idea. It looks quite smart.

john stones 105/03/2017 09:12:53
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10487 forum posts
1475 photos

The Ballerina plan shows infils Tim, courtesy of Peter Miller, copied it of me though wink

Tim Ballinger05/03/2017 09:16:06
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540 forum posts
227 photos

thanks John, Think I might add that little feature.

Tim

Tim Ballinger05/03/2017 09:47:29
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540 forum posts
227 photos

Then again having just looked at skywriters stringer density that might make tha bit too much of a challenge.

Tim

Tim Ballinger05/03/2017 14:51:38
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540 forum posts
227 photos

So with A Lucas dummy tail and a lot of dust and shavings...

img_0922.jpg

img_0921.jpg

And the I couldn't resist a look see.

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Quite pleased.

john stones 105/03/2017 14:55:07
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10487 forum posts
1475 photos

Looks great, you're right to be pleased, i see there's a curve on the stringers ? if so my cutting's not as bad as i thought face 1

John

Lucas Hofman05/03/2017 15:33:02
596 forum posts
316 photos

Wow, this starts to look really good. Do not forget to replace the dummy before covering. Shrink film excerts enough force when shrinking to break off your fairings.

Lucas

There may not be so much mass in this build, but the three of use achieve its goal nicely...

Tim Ballinger05/03/2017 15:37:41
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540 forum posts
227 photos

John , what dimension are you looking at. Certainly there is a curve along each stringer along the length of the fus. Laterally, the only one which is actually curved Is the lower stringer on the starboard side. I fat fingered the last attachment on F9 and did not notice until it was set. The rest are pretty straight laterally when you put a ruler along but she definitely has a curve along the back. Must look at some others to see if I am unique.

I need to think about the wings now so will have to go back and reread all your wing building logs to see what tips I can pick up.

Am I right that you have changed the aileron design ?

Tim

john stones 105/03/2017 15:57:38
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10487 forum posts
1475 photos

Yes along the length, i was misreading my plan and thought i'd cut mine wrong. Yes i've gone for inset ailerons because i cut em myself, and thought i'd be different.

John

Tim Ballinger05/03/2017 17:15:48
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540 forum posts
227 photos

Thanks Lucas. Dummy tail back in already. Now talking about covering. I have a few questions.

Firstly the glass and epoxy covering on the front fus of the original. Was that so that detailing was easier to apply (rivets etc) or is there a durability or strength factor that I am missing?

Secondly , solarfilm was the only shrink game in town when I last covered a model(other than patching attic damage to my impala wings that is and even that was with 40yr old solarfilm), now there seems to be a plethora of types . I know I may get several different answers and that is fine but what do you all recommend?

Tim

john stones 105/03/2017 17:19:12
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10487 forum posts
1475 photos

Hobby King film..good price, very strong, lots of colours.

john stones 105/03/2017 17:27:09
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10487 forum posts
1475 photos

Glassing would add strength, Lindsay added panel lines n rivets as you've said, maybe it's easier around the cabane area also ?

John

Lucas Hofman06/03/2017 08:31:29
596 forum posts
316 photos

I have used Oracover and Hobby King. Hobby King is both easier to apply and more durable. Do not use anything else anymore.

Glassing add strenght but you do not need it. 6mm balsa is enough. I am going to glass but that is only because I want to try a new technique (have never glassed a fuse before) and want to start doing panel lines, nails etc. If you just want to fly cover the nose with film and you are good to go much faster (and cheaper, since glass means hi-build primer and paint).

Regards, Lucas

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